Intensity and color are now adjusted upon import to get correct values

Better not have settings manipulate eachother where possible,
in this case an operator could be used to manage mixing manipulator options

intern/ghost/intern/GHOST_SystemX11.cpp

@@ -525,6 +525,16 @@ processEvents(
 				continue;
 			}
 #endif
+			/* when using autorepeat, some keypress events can actually come *after* the
+			 * last keyrelease. The next code takes care of that */
+			if (xevent.type == KeyRelease) {
+				m_last_release_keycode = xevent.xkey.keycode;
+				m_last_release_time = xevent.xkey.time;
+			}
+			else if (xevent.type == KeyPress) {
+				if ((xevent.xkey.keycode == m_last_release_keycode) && ((xevent.xkey.time <= m_last_release_time)))
+					continue;
+			}
 
 			processEvent(&xevent);
 			anyProcessed = true;

intern/ghost/intern/GHOST_SystemX11.h

@@ -356,6 +356,10 @@ private:
 	 *  and stop accumulating all events generated before that */
 	Time m_last_warp;
 
+	/* detect autorepeat glitch */
+	unsigned int m_last_release_keycode;
+	Time m_last_release_time;
+
 	/**
 	 * Return the ghost window associated with the
 	 * X11 window xwind

release/scripts/modules/bpy_types.py

@@ -140,6 +140,15 @@ class WindowManager(bpy_types.ID):
         finally:
             self.pupmenu_end__internal(popup)
 
+    def popup_menu_pie(self, event, draw_func, title="", icon='NONE'):
+        import bpy
+        pie = self.piemenu_begin__internal(title, icon, event)
+
+        try:
+            draw_func(pie, bpy.context)
+        finally:
+            self.piemenu_end__internal(pie)
+
 
 class _GenericBone:
     """

release/scripts/startup/bl_operators/wm.py

@@ -527,7 +527,33 @@ class WM_OT_context_menu_enum(Operator):
 
         context.window_manager.popup_menu(draw_func=draw_cb, title=prop.name, icon=prop.icon)
 
-        return {'PASS_THROUGH'}
+        return {'FINISHED'}
+
+
+class WM_OT_context_pie_enum(Operator):
+    bl_idname = "wm.context_pie_enum"
+    bl_label = "Context Enum Pie"
+    bl_options = {'UNDO', 'INTERNAL'}
+    data_path = rna_path_prop
+
+    def invoke(self, context, event):
+        data_path = self.data_path
+        value = context_path_validate(context, data_path)
+
+        if value is Ellipsis:
+            return {'PASS_THROUGH'}
+
+        base_path, prop_string = data_path.rsplit(".", 1)
+        value_base = context_path_validate(context, base_path)
+        prop = value_base.bl_rna.properties[prop_string]
+
+        def draw_cb(self, context):
+            layout = self.layout
+            layout.prop(value_base, prop_string, expand=True)
+
+        context.window_manager.popup_menu_pie(draw_func=draw_cb, title=prop.name, icon=prop.icon, event=event)
+
+        return {'FINISHED'}
 
 
 class WM_OT_context_set_id(Operator):

release/scripts/startup/bl_ui/space_userpref.py

@@ -216,6 +216,13 @@ class USERPREF_PT_interface(Panel):
         sub.prop(view, "open_toplevel_delay", text="Top Level")
         sub.prop(view, "open_sublevel_delay", text="Sub Level")
 
+        col.separator()
+        col.label(text="Pie Menus:")
+        sub = col.column(align=True)
+        sub.prop(view, "pie_animation_timeout")
+        sub.prop(view, "pie_initial_timeout")
+        sub.prop(view, "pie_menu_radius")
+        sub.prop(view, "pie_menu_threshold")
         col.separator()
         col.separator()
         col.separator()
@@ -681,6 +688,9 @@ class USERPREF_PT_theme(Panel):
             col.label(text="Menu:")
             self._theme_widget_style(col, ui.wcol_menu)
 
+            col.label(text="Pie Menu:")
+            self._theme_widget_style(col, ui.wcol_pie_menu)
+
             col.label(text="Pulldown:")
             self._theme_widget_style(col, ui.wcol_pulldown)
 

release/scripts/templates_py/ui_pie_menu.py

@@ -0,0 +1,32 @@
+import bpy
+from bpy.types import Menu
+
+# spawn an edit mode selection pie (run while object is in edit mode to get a valid output)
+
+
+class VIEW3D_PIE_template(Menu):
+    # label is displayed at the center of the pie menu.
+    bl_label = "Select Mode"
+
+    def draw(self, context):
+        layout = self.layout
+
+        pie = layout.menu_pie()
+        # operator_enum will just spread all available options
+        # for the type enum of the operator on the pie
+        pie.operator_enum("mesh.select_mode", "type")
+
+
+def register():
+    bpy.utils.register_class(VIEW3D_PIE_template)
+
+
+def unregister():
+    bpy.utils.unregister_class(VIEW3D_PIE_template)
+
+
+if __name__ == "__main__":
+    register()
+
+    bpy.ops.wm.call_menu_pie(name="VIEW3D_PIE_template")
+

source/blender/blenkernel/BKE_blender.h

@@ -42,7 +42,7 @@ extern "C" {
  * and keep comment above the defines.
  * Use STRINGIFY() rather than defining with quotes */
 #define BLENDER_VERSION         271
-#define BLENDER_SUBVERSION      3
+#define BLENDER_SUBVERSION      4
 /* 262 was the last editmesh release but it has compatibility code for bmesh data */
 #define BLENDER_MINVERSION      270
 #define BLENDER_MINSUBVERSION   5

source/blender/collada/DocumentImporter.cpp

@@ -805,10 +805,14 @@ void DocumentImporter::write_profile_COMMON(COLLADAFW::EffectCommon *ef, Materia
 	// DIFFUSE
 	// color
 	if (ef->getDiffuse().isColor()) {
+		/* too high intensity can create artefacts (fireflies)
+		   So here we take care that intensity is set to 0.8 wherever possible
+		*/
 		col = ef->getDiffuse().getColor();
-		ma->r = col.getRed();
-		ma->g = col.getGreen();
-		ma->b = col.getBlue();
+		ma->ref = max_ffff(col.getRed(), col.getGreen(), col.getBlue(), 0.8);
+		ma->r = col.getRed()   / ma->ref;
+		ma->g = col.getGreen() / ma->ref;
+		ma->b = col.getBlue()  / ma->ref;
 	}
 	// texture
 	else if (ef->getDiffuse().isTexture()) {

source/blender/editors/include/ED_space_api.h

@@ -35,6 +35,7 @@ struct ARegionType;
 struct bContext;
 
 void ED_spacetypes_init(void);
+void ED_spacemacros_init(void);
 
 /* the pluginnable API for export to editors */
 

source/blender/editors/include/UI_interface.h

@@ -102,6 +102,7 @@ typedef struct uiLayout uiLayout;
 #define UI_EMBOSSN      1   /* Nothing, only icon and/or text */
 #define UI_EMBOSSP      2   /* Pulldown menu style */
 #define UI_EMBOSST      3   /* Table */
+#define UI_EMBOSSR      4   /* Pie Menu */
 
 /* uiBlock->direction */
 #define UI_DIRECTION       (UI_TOP | UI_DOWN | UI_LEFT | UI_RIGHT)
@@ -137,6 +138,7 @@ typedef struct uiLayout uiLayout;
 /* block->flag bits 14-17 are identical to but->drawflag bits */
 
 #define UI_BLOCK_LIST_ITEM   (1 << 19)
+#define UI_BLOCK_RADIAL      (1 << 20)
 
 /* uiPopupBlockHandle->menuretval */
 #define UI_RETURN_CANCEL     (1 << 0)   /* cancel all menus cascading */
@@ -359,6 +361,17 @@ struct uiLayout *uiPupMenuLayout(uiPopupMenu *head);
 void uiPupMenuReports(struct bContext *C, struct ReportList *reports) ATTR_NONNULL();
 bool uiPupMenuInvoke(struct bContext *C, const char *idname, struct ReportList *reports) ATTR_NONNULL(1, 2);
 
+/* Pie menus */
+typedef struct uiPieMenu uiPieMenu;
+
+void uiPieMenuInvoke(struct bContext *C, const char *idname, const struct wmEvent *event);
+void uiPieOperatorEnumInvoke(struct bContext *C, const char *title, const char *opname,
+                             const char *propname, const struct wmEvent *event);
+void uiPieEnumInvoke(struct bContext *C, const char *title, const char *path, const struct wmEvent *event);
+
+struct uiPieMenu *uiPieMenuBegin(struct bContext *C, const char *title, int icon, const struct wmEvent *event) ATTR_NONNULL();
+void uiPieMenuEnd(struct bContext *C, uiPieMenu *pie);
+struct uiLayout *uiPieMenuLayout(struct uiPieMenu *pie);
 /* Popup Blocks
  *
  * Functions used to create popup blocks. These are like popup menus
@@ -416,7 +429,8 @@ typedef enum {
 	UI_BLOCK_BOUNDS_TEXT,
 	UI_BLOCK_BOUNDS_POPUP_MOUSE,
 	UI_BLOCK_BOUNDS_POPUP_MENU,
-	UI_BLOCK_BOUNDS_POPUP_CENTER
+	UI_BLOCK_BOUNDS_POPUP_CENTER,
+	UI_BLOCK_BOUNDS_PIE_CENTER,
 } eBlockBoundsCalc;
 
 void uiBoundsBlock(struct uiBlock *block, int addval);
@@ -704,7 +718,7 @@ void                       UI_panel_category_draw_all(struct ARegion *ar, const
  * as screen/ if ED_KEYMAP_UI is set, or internally in popup functions. */
 
 void UI_add_region_handlers(struct ListBase *handlers);
-void UI_add_popup_handlers(struct bContext *C, struct ListBase *handlers, uiPopupBlockHandle *popup);
+void UI_add_popup_handlers(struct bContext *C, struct ListBase *handlers, uiPopupBlockHandle *popup, const bool accept_dbl_click);
 void UI_remove_popup_handlers(struct ListBase *handlers, uiPopupBlockHandle *popup);
 void UI_remove_popup_handlers_all(struct bContext *C, struct ListBase *handlers);
 
@@ -736,6 +750,7 @@ void UI_exit(void);
 #define UI_LAYOUT_HEADER        1
 #define UI_LAYOUT_MENU          2
 #define UI_LAYOUT_TOOLBAR       3
+#define UI_LAYOUT_PIEMENU       4
 
 #define UI_UNIT_X               ((void)0, U.widget_unit)
 #define UI_UNIT_Y               ((void)0, U.widget_unit)
@@ -826,8 +841,8 @@ uiLayout *uiLayoutListBox(uiLayout *layout, struct uiList *ui_list, struct Point
 uiLayout *uiLayoutAbsolute(uiLayout *layout, int align);
 uiLayout *uiLayoutSplit(uiLayout *layout, float percentage, int align);
 uiLayout *uiLayoutOverlap(uiLayout *layout);
-
 uiBlock *uiLayoutAbsoluteBlock(uiLayout *layout);
+uiLayout *uiLayoutRadial(uiLayout *layout);
 
 /* templates */
 void uiTemplateHeader(uiLayout *layout, struct bContext *C);

source/blender/editors/interface/interface.c

@@ -321,6 +321,20 @@ static void ui_centered_bounds_block(wmWindow *window, uiBlock *block)
 	ui_bounds_block(block);
 	
 }
+
+static void ui_centered_pie_bounds_block(uiBlock *block)
+{
+	const int xy[2] = {
+	    block->pie_data.pie_center_spawned[0],
+	    block->pie_data.pie_center_spawned[1]
+	};
+
+	ui_block_translate(block, xy[0], xy[1]);
+
+	/* now recompute bounds and safety */
+	ui_bounds_block(block);
+}
+
 static void ui_popup_bounds_block(wmWindow *window, uiBlock *block,
                                   eBlockBoundsCalc bounds_calc, const int xy[2])
 {
@@ -1062,6 +1076,42 @@ static bool ui_but_event_property_operator_string(const bContext *C, uiBut *but,
 	return found;
 }
 
+/* this goes in a seemingly weird pattern:
+ *
+ *     4
+ *  5     6
+ * 1       2
+ *  7     8
+ *     3
+ *
+ * but it's actually quite logical. It's designed to be 'upwards compatible'
+ * for muscle memory so that the menu item locations are fixed and don't move
+ * as new items are added to the menu later on. It also optimises efficiency -
+ * a radial menu is best kept symmetrical, with as large an angle between
+ * items as possible, so that the gestural mouse movements can be fast and inexact.
+
+ * It starts off with two opposite sides for the first two items
+ * then joined by the one below for the third (this way, even with three items,
+ * the menu seems to still be 'in order' reading left to right). Then the fourth is
+ * added to complete the compass directions. From here, it's just a matter of
+ * subdividing the rest of the angles for the last 4 items.
+ *
+ * --Matt 07/2006
+ */
+const char ui_radial_dir_order[8] = {
+    UI_RADIAL_W,  UI_RADIAL_E,  UI_RADIAL_S,  UI_RADIAL_N,
+    UI_RADIAL_NW, UI_RADIAL_NE, UI_RADIAL_SW, UI_RADIAL_SE};
+
+const char  ui_radial_dir_to_numpad[8] = {8, 9, 6, 3, 2, 1, 4, 7};
+const short ui_radial_dir_to_angle_visual[8] = {90, 40, 0, 320, 270, 220, 180, 140};
+const short ui_radial_dir_to_angle[8] =        {90, 45, 0, 315, 270, 225, 180, 135};
+
+static void ui_but_pie_direction_string(uiBut *but, char *buf, int size)
+{
+	BLI_assert(but->pie_dir < ARRAY_SIZE(ui_radial_dir_to_numpad));
+	BLI_snprintf(buf, size, "%d", ui_radial_dir_to_numpad[but->pie_dir]);
+}
+
 static void ui_menu_block_set_keymaps(const bContext *C, uiBlock *block)
 {
 	uiBut *but;
@@ -1071,13 +1121,23 @@ static void ui_menu_block_set_keymaps(const bContext *C, uiBlock *block)
 	if (block->rect.xmin != block->rect.xmax)
 		return;
 
-	for (but = block->buttons.first; but; but = but->next) {
-
-		if (ui_but_event_operator_string(C, but, buf, sizeof(buf))) {
-			ui_but_add_shortcut(but, buf, false);
+	if (block->flag & UI_BLOCK_RADIAL) {
+		for (but = block->buttons.first; but; but = but->next) {
+			if (but->pie_dir != UI_RADIAL_NONE) {
+				ui_but_pie_direction_string(but, buf, sizeof(buf));
+				ui_but_add_shortcut(but, buf, false);
+			}
 		}
-		else if (ui_but_event_property_operator_string(C, but, buf, sizeof(buf))) {
-			ui_but_add_shortcut(but, buf, false);
+	}
+	else {
+		for (but = block->buttons.first; but; but = but->next) {
+
+			if (ui_but_event_operator_string(C, but, buf, sizeof(buf))) {
+				ui_but_add_shortcut(but, buf, false);
+			}
+			else if (ui_but_event_property_operator_string(C, but, buf, sizeof(buf))) {
+				ui_but_add_shortcut(but, buf, false);
+			}
 		}
 	}
 }
@@ -1173,6 +1233,9 @@ void uiEndBlock_ex(const bContext *C, uiBlock *block, const int xy[2])
 		case UI_BLOCK_BOUNDS_POPUP_CENTER:
 			ui_centered_bounds_block(window, block);
 			break;
+		case UI_BLOCK_BOUNDS_PIE_CENTER:
+			ui_centered_pie_bounds_block(block);
+			break;
 
 			/* fallback */
 		case UI_BLOCK_BOUNDS_POPUP_MOUSE:
@@ -1244,6 +1307,10 @@ void uiDrawBlock(const bContext *C, uiBlock *block)
 	rcti rect;
 	int multisample_enabled;
 	
+	/* early exit if cancelled */
+	if ((block->flag & UI_BLOCK_RADIAL) && (block->pie_data.flags & UI_PIE_FINISHED))
+		return;
+
 	/* get menu region or area region */
 	ar = CTX_wm_menu(C);
 	if (!ar)
@@ -1279,7 +1346,9 @@ void uiDrawBlock(const bContext *C, uiBlock *block)
 	wmOrtho2(-0.01f, ar->winx - 0.01f, -0.01f, ar->winy - 0.01f);
 	
 	/* back */
-	if (block->flag & UI_BLOCK_LOOP)
+	if (block->flag & UI_BLOCK_RADIAL)
+		ui_draw_pie_center(block);
+	else if (block->flag & UI_BLOCK_LOOP)
 		ui_draw_menu_back(&style, block, &rect);
 	else if (block->panel)
 		ui_draw_aligned_panel(&style, block, &rect, UI_panel_category_is_visible(ar));
@@ -3002,6 +3071,7 @@ static uiBut *ui_def_but(uiBlock *block, int type, int retval, const char *str,
 	but->lock = block->lock;
 	but->lockstr = block->lockstr;
 	but->dt = block->dt;
+	but->pie_dir = UI_RADIAL_NONE;
 
 	but->block = block;  /* pointer back, used for frontbuffer status, and picker */
 
@@ -3028,8 +3098,11 @@ static uiBut *ui_def_but(uiBlock *block, int type, int retval, const char *str,
 		}
 	}
 
-	if ((block->flag & UI_BLOCK_LOOP) ||
-	    ELEM(but->type, MENU, TEX, LABEL, BLOCK, BUTM, SEARCH_MENU, PROGRESSBAR, SEARCH_MENU_UNLINK))
+	if (block->flag & UI_BLOCK_RADIAL) {
+		but->drawflag |= (UI_BUT_TEXT_LEFT | UI_BUT_ICON_LEFT);
+	}
+	else if ((block->flag & UI_BLOCK_LOOP) ||
+	         ELEM(but->type, MENU, TEX, LABEL, BLOCK, BUTM, SEARCH_MENU, PROGRESSBAR, SEARCH_MENU_UNLINK))
 	{
 		but->drawflag |= (UI_BUT_TEXT_LEFT | UI_BUT_ICON_LEFT);
 	}

source/blender/editors/interface/interface_handlers.c

@@ -116,6 +116,7 @@ static bool ui_mouse_motion_keynav_test(struct uiKeyNavLock *keynav, const wmEve
 #define BUTTON_TOOLTIP_DELAY        0.500
 #define BUTTON_FLASH_DELAY          0.020
 #define MENU_SCROLL_INTERVAL        0.1
+#define PIE_MENU_INTERVAL           0.01
 #define BUTTON_AUTO_OPEN_THRESH     0.3
 #define BUTTON_MOUSE_TOWARDS_THRESH 1.0
 /* pixels to move the cursor to get out of keyboard navigation */
@@ -1238,7 +1239,7 @@ static bool ui_but_start_drag(bContext *C, uiBut *but, uiHandleButtonData *data,
 			WM_event_add_ui_handler(C, &data->window->modalhandlers,
 			                        ui_handler_region_drag_toggle,
 			                        ui_handler_region_drag_toggle_remove,
-			                        drag_info);
+			                        drag_info, false);
 
 			CTX_wm_region_set(C, ar_prev);
 		}
@@ -6377,6 +6378,43 @@ static bool ui_but_contains_pt(uiBut *but, float mx, float my)
 	return BLI_rctf_isect_pt(&but->rect, mx, my);
 }
 
+static void ui_but_pie_dir__internal(RadialDirection dir, float vec[2], const short angles[8])
+{
+	float angle;
+
+	BLI_assert(dir != UI_RADIAL_NONE);
+
+	angle = DEG2RADF((float)angles[dir]);
+	vec[0] = cosf(angle);
+	vec[1] = sinf(angle);
+}
+
+void ui_but_pie_dir_visual(RadialDirection dir, float vec[2])
+{
+	ui_but_pie_dir__internal(dir, vec, ui_radial_dir_to_angle_visual);
+}
+
+void ui_but_pie_dir(RadialDirection dir, float vec[2])
+{
+	ui_but_pie_dir__internal(dir, vec, ui_radial_dir_to_angle);
+}
+
+static bool ui_but_isect_pie_seg(uiBlock *block, uiBut *but)
+{
+	const float angle_range = (block->pie_data.flags & UI_PIE_DEGREES_RANGE_LARGE) ? M_PI_4 : M_PI_4 / 2.0;
+	float vec[2];
+
+	if (block->pie_data.flags & UI_PIE_INVALID_DIR)
+		return false;
+
+	ui_but_pie_dir(but->pie_dir, vec);
+
+	if (saacos(dot_v2v2(vec, block->pie_data.pie_dir)) < angle_range)
+		return true;
+
+	return false;
+}
+
 uiBut *ui_but_find_activated(ARegion *ar)
 {
 	uiBlock *block;
@@ -6495,6 +6533,7 @@ static bool ui_mouse_inside_region(ARegion *ar, int x, int y)
 
 static bool ui_mouse_inside_button(ARegion *ar, uiBut *but, int x, int y)
 {
+	uiBlock *block = but->block;
 	float mx, my;
 	if (!ui_mouse_inside_region(ar, x, y))
 		return false;
@@ -6502,10 +6541,16 @@ static bool ui_mouse_inside_button(ARegion *ar, uiBut *but, int x, int y)
 	mx = x;
 	my = y;
 
-	ui_window_to_block_fl(ar, but->block, &mx, &my);
+	ui_window_to_block_fl(ar, block, &mx, &my);
 
-	if (!ui_but_contains_pt(but, mx, my))
+	if (but->dt == UI_EMBOSSR) {
+		if (!ui_but_isect_pie_seg(block, but)) {
+			return false;
+		}
+	}
+	else if (!ui_but_contains_pt(but, mx, my)) {
 		return false;
+	}
 	
 	return true;
 }
@@ -6559,7 +6604,13 @@ static uiBut *ui_but_find_mouse_over_ex(ARegion *ar, const int x, const int y, c
 
 		for (but = block->buttons.last; but; but = but->prev) {
 			if (ui_is_but_interactive(but, labeledit)) {
-				if (ui_but_contains_pt(but, mx, my)) {
+				if (but->pie_dir != UI_RADIAL_NONE) {
+					if (ui_but_isect_pie_seg(block, but)) {
+						butover = but;
+						break;
+					}
+				}
+				else if (ui_but_contains_pt(but, mx, my)) {
 					butover = but;
 					break;
 				}
@@ -6764,7 +6815,7 @@ static void button_activate_state(bContext *C, uiBut *but, uiHandleButtonState s
 	if (!(but->block->handle && but->block->handle->popup)) {
 		if (button_modal_state(state)) {
 			if (!button_modal_state(data->state))
-				WM_event_add_ui_handler(C, &data->window->modalhandlers, ui_handler_region_menu, NULL, data);
+				WM_event_add_ui_handler(C, &data->window->modalhandlers, ui_handler_region_menu, NULL, data, false);
 		}
 		else {
 			if (button_modal_state(data->state)) {
@@ -7914,6 +7965,30 @@ static int ui_handle_menu_button(bContext *C, const wmEvent *event, uiPopupBlock
 	return retval;
 }
 
+void ui_block_calculate_pie_segment(uiBlock *block, const float event_xy[2])
+{
+	float seg1[2];
+	float seg2[2];
+	float len;
+
+	if (block->pie_data.flags & UI_PIE_INITIAL_DIRECTION) {
+		copy_v2_v2(seg1, block->pie_data.pie_center_init);
+	}
+	else {
+		copy_v2_v2(seg1, block->pie_data.pie_center_spawned);
+	}
+
+	sub_v2_v2v2(seg2, event_xy, seg1);
+
+	len = normalize_v2_v2(block->pie_data.pie_dir, seg2);
+
+	/* ten pixels for now, a bit arbitrary */
+	if (len < U.pie_menu_threshold * U.pixelsize)
+		block->pie_data.flags |= UI_PIE_INVALID_DIR;
+	else
+		block->pie_data.flags &= ~UI_PIE_INVALID_DIR;
+}
+
 static int ui_handle_menu_event(
         bContext *C, const wmEvent *event, uiPopupBlockHandle *menu,
         int level, const bool is_parent_inside, const bool is_parent_menu, const bool is_floating)
@@ -8415,10 +8490,311 @@ static int ui_handle_menu_return_submenu(bContext *C, const wmEvent *event, uiPo
 		ui_mouse_motion_towards_reinit(menu, &event->x);
 	}
 
-	if (menu->menuretval)
+	if (menu->menuretval) {
+		/* pie menus should not close but wait for release instead */
+		if ((block->flag & UI_BLOCK_RADIAL) &&
+		    !(block->pie_data.flags & UI_PIE_CLICK_STYLE))
+		{
+			menu->menuretval = 0;
+			block->pie_data.flags |= UI_PIE_FINISHED;
+		}
+
 		return WM_UI_HANDLER_CONTINUE;
-	else
+	}
+	else {
 		return WM_UI_HANDLER_BREAK;
+	}
+}
+
+static bool ui_but_pie_menu_supported_apply(uiBut *but)
+{
+	return (but->type != NUMSLI);
+}
+
+static int ui_but_pie_menu_apply(bContext *C, uiPopupBlockHandle *menu, uiBut *but, bool force_close, bool click_style)
+{
+	int retval = WM_UI_HANDLER_BREAK;
+
+	if (but && ui_but_pie_menu_supported_apply(but)) {
+		if (but->type == MENU) {
+			/* forcing the pie menu to close will not handle menus */
+			if (!force_close) {
+				uiBut *active_but = ui_but_find_activated(menu->region);
+
+				if (active_but) {
+					button_activate_exit(C, active_but, active_but->active, false, false);
+				}
+
+				button_activate_init(C, menu->region, but, BUTTON_ACTIVATE_OPEN);
+				return retval;
+			}
+			else {
+				menu->menuretval = UI_RETURN_CANCEL;
+			}
+		}
+		else {
+			ui_apply_button(C, but->block, but, but->active, false);
+			button_activate_exit((bContext *)C, but, but->active, false, true);
+
+			if (!(click_style || force_close)) {
+				but->block->pie_data.flags |= UI_PIE_FINISHED;
+				menu->menuretval = 0;
+			}
+			else {
+				menu->menuretval = UI_RETURN_OK;
+			}
+		}
+	}
+	else {
+		uiBlock *block = menu->region->uiblocks.first;
+
+		if (!(click_style || force_close)) {
+			block->pie_data.flags |= UI_PIE_FINISHED;
+		}
+		else {
+			menu->menuretval = UI_RETURN_CANCEL;
+		}
+
+		ED_region_tag_redraw(menu->region);
+	}
+
+	return retval;
+}
+
+static uiBut *ui_block_pie_dir_activate(uiBlock *block, const wmEvent *event, RadialDirection dir)
+{
+	uiBut *but;
+
+	if ((block->flag & UI_BLOCK_NUMSELECT) && event->val == KM_PRESS) {
+		for (but = block->buttons.first; but; but = but->next) {
+			if (but->pie_dir == dir && !ELEM(but->type, SEPR, SEPRLINE)) {
+				return but;
+			}
+		}
+	}
+
+	return NULL;
+}
+
+static int ui_but_pie_button_activate(bContext *C, uiBut *but, uiPopupBlockHandle *menu, bool is_click_style)
+{
+	uiBut *active_but;
+
+	if (but == NULL)
+		return WM_UI_HANDLER_BREAK;
+
+	active_but = ui_but_find_activated(menu->region);
+
+	if (active_but)
+		button_activate_exit(C, active_but, active_but->active, false, false);
+
+	button_activate_init(C, menu->region, but, BUTTON_ACTIVATE_OVER);
+	return ui_but_pie_menu_apply(C, menu, but, false, is_click_style);
+}
+
+static int ui_handler_pie(bContext *C, const wmEvent *event, uiPopupBlockHandle *menu)
+{
+	ARegion *ar;
+	uiBlock *block;
+	uiBut *but;
+	float event_xy[2];
+	double duration;
+	bool is_click_style;
+
+	/* we block all events, this is modal interaction, except for drop events which is described below */
+	int retval = WM_UI_HANDLER_BREAK;
+
+	if (event->type == EVT_DROP) {
+		/* may want to leave this here for later if we support pie ovens */
+
+		retval = WM_UI_HANDLER_CONTINUE;
+	}
+
+	ar = menu->region;
+	block = ar->uiblocks.first;
+
+	is_click_style = (block->pie_data.flags & UI_PIE_CLICK_STYLE);
+
+	if (menu->scrolltimer == NULL) {
+		menu->scrolltimer =
+		    WM_event_add_timer(CTX_wm_manager(C), CTX_wm_window(C), TIMER, PIE_MENU_INTERVAL);
+		menu->scrolltimer->duration = 0.0;
+	}
+
+	duration = menu->scrolltimer->duration;
+
+	if (event->type == TIMER) {
+		if (event->customdata == menu->scrolltimer) {
+			/* deactivate initial direction after a while */
+			if (duration > 0.01 * U.pie_initial_timeout) {
+				block->pie_data.flags &= ~UI_PIE_INITIAL_DIRECTION;
+			}
+
+			/* handle animation */
+			if (!(block->pie_data.flags & UI_PIE_ANIMATION_FINISHED)) {
+				uiBut *but;
+				double final_time = 0.01 * U.pie_animation_timeout;
+				float fac = duration / final_time;
+				float pie_radius = U.pie_menu_radius * UI_DPI_FAC;
+
+				if (fac > 1.0f) {
+					fac = 1.0f;
+					block->pie_data.flags |= UI_PIE_ANIMATION_FINISHED;
+				}
+
+				pie_radius *= fac;
+
+				for (but = block->buttons.first; but; but = but->next) {
+					if (but->pie_dir != UI_RADIAL_NONE) {
+						float dir[2];
+
+						ui_but_pie_dir_visual(but->pie_dir, dir);
+
+						mul_v2_fl(dir, pie_radius );
+						add_v2_v2(dir, block->pie_data.pie_center_spawned);
+						BLI_rctf_recenter(&but->rect, dir[0], dir[1]);
+					}
+				}
+				block->pie_data.alphafac = fac;
+
+				ED_region_tag_redraw(ar);
+			}
+		}
+	}
+
+	event_xy[0] = event->x;
+	event_xy[1] = event->y;
+
+	ui_window_to_block_fl(ar, block, &event_xy[0], &event_xy[1]);
+
+	ui_block_calculate_pie_segment(block, event_xy);
+
+	if (block->pie_data.flags & UI_PIE_FINISHED) {
+		if ((event->type == block->pie_data.event && event->val == KM_RELEASE) ||
+		    ((event->type == RIGHTMOUSE || event->type == ESCKEY) && (event->val == KM_PRESS)))
+		{
+			menu->menuretval = UI_RETURN_OK;
+		}
+
+		ED_region_tag_redraw(ar);
+		return WM_UI_HANDLER_BREAK;
+	}
+
+	if (event->type == block->pie_data.event) {
+		if (event->val != KM_RELEASE) {
+			ui_handle_menu_button(C, event, menu);
+
+			/* why redraw here? It's simple, we are getting many double click events here.
+			 * Those operate like mouse move events almost */
+			ED_region_tag_redraw(ar);
+		}
+		else {
+			/* distance from initial point */
+			if (len_squared_v2v2(event_xy, block->pie_data.pie_center_init) < PIE_CLICK_THRESHOLD_SQ) {
+				block->pie_data.flags |= UI_PIE_CLICK_STYLE;
+			}
+			else if (!is_click_style) {
+				uiBut *but = ui_but_find_activated(menu->region);
+
+				retval = ui_but_pie_menu_apply(C, menu, but, true, is_click_style);
+			}
+		}
+	}
+	else {
+		/* direction from numpad */
+		RadialDirection num_dir = UI_RADIAL_NONE;
+
+		switch (event->type) {
+			case MOUSEMOVE:
+				/* mouse move should always refresh the area for pie menus */
+				ui_handle_menu_button(C, event, menu);
+				ED_region_tag_redraw(ar);
+				break;
+
+			case LEFTMOUSE:
+				if (event->val == KM_PRESS) {
+					uiBut *but = ui_but_find_activated(menu->region);
+					retval = ui_but_pie_menu_apply(C, menu, but, false, is_click_style);
+				}
+				break;
+
+			case ESCKEY:
+			case RIGHTMOUSE:
+				if (!is_click_style) {
+					block->pie_data.flags |= UI_PIE_FINISHED;
+					menu->menuretval = 0;
+					ED_region_tag_redraw(ar);
+				}
+				else
+					menu->menuretval = UI_RETURN_CANCEL;
+				break;
+
+			case AKEY:
+			case BKEY:
+			case CKEY:
+			case DKEY:
+			case EKEY:
+			case FKEY:
+			case GKEY:
+			case HKEY:
+			case IKEY:
+			case JKEY:
+			case KKEY:
+			case LKEY:
+			case MKEY:
+			case NKEY:
+			case OKEY:
+			case PKEY:
+			case QKEY:
+			case RKEY:
+			case SKEY:
+			case TKEY:
+			case UKEY:
+			case VKEY:
+			case WKEY:
+			case XKEY:
+			case YKEY:
+			case ZKEY:
+			{
+				if ((event->val  == KM_PRESS || event->val == KM_DBL_CLICK) &&
+				    (event->shift == 0) &&
+				    (event->ctrl  == 0) &&
+				    (event->oskey == 0))
+				{
+					for (but = block->buttons.first; but; but = but->next) {
+						if (but->menu_key == event->type) {
+							ui_but_pie_button_activate(C, but, menu, is_click_style);
+						}
+					}
+				}
+				break;
+			}
+
+#define CASE_NUM_TO_DIR(n, d) \
+			case (ZEROKEY + n): case (PAD0 + n): \
+				{ if (num_dir == UI_RADIAL_NONE) num_dir = d; } (void)0
+
+			CASE_NUM_TO_DIR(1, UI_RADIAL_SW);
+			CASE_NUM_TO_DIR(2, UI_RADIAL_S);
+			CASE_NUM_TO_DIR(3, UI_RADIAL_SE);
+			CASE_NUM_TO_DIR(4, UI_RADIAL_W);
+			CASE_NUM_TO_DIR(6, UI_RADIAL_E);
+			CASE_NUM_TO_DIR(7, UI_RADIAL_NW);
+			CASE_NUM_TO_DIR(8, UI_RADIAL_N);
+			CASE_NUM_TO_DIR(9, UI_RADIAL_NE);
+			{
+				but = ui_block_pie_dir_activate(block, event, num_dir);
+				retval = ui_but_pie_button_activate(C, but, menu, is_click_style);
+				break;
+			}
+#undef CASE_NUM_TO_DIR
+			default:
+				retval = ui_handle_menu_button(C, event, menu);
+				break;
+		}
+	}
+
+	return retval;
 }
 
 static int ui_handle_menus_recursive(
@@ -8440,17 +8816,21 @@ static int ui_handle_menus_recursive(
 		uiBlock *block = menu->region->uiblocks.first;
 		const bool is_menu = ui_block_is_menu(block);
 		bool inside = false;
+		/* root pie menus accept the key that spawned them as double click to improve responsiveness */
+		bool do_recursion = (!(block->flag & UI_BLOCK_RADIAL) || event->type != block->pie_data.event);
 
-		if (is_parent_inside == false) {
-			int mx, my;
+		if (do_recursion) {
+			if (is_parent_inside == false) {
+				int mx, my;
 
-			mx = event->x;
-			my = event->y;
-			ui_window_to_block(menu->region, block, &mx, &my);
-			inside = BLI_rctf_isect_pt(&block->rect, mx, my);
+				mx = event->x;
+				my = event->y;
+				ui_window_to_block(menu->region, block, &mx, &my);
+				inside = BLI_rctf_isect_pt(&block->rect, mx, my);
+			}
+
+			retval = ui_handle_menus_recursive(C, event, submenu, level + 1, is_parent_inside || inside, is_menu, false);
 		}
-
-		retval = ui_handle_menus_recursive(C, event, submenu, level + 1, is_parent_inside || inside, is_menu, false);
 	}
 
 	/* now handle events for our own menu */
@@ -8483,7 +8863,12 @@ static int ui_handle_menus_recursive(
 			}
 		}
 		else {
-			retval = ui_handle_menu_event(C, event, menu, level, is_parent_inside, is_parent_menu, is_floating);
+			uiBlock *block = menu->region->uiblocks.first;
+
+			if (block->flag & UI_BLOCK_RADIAL)
+				retval = ui_handler_pie(C, event, menu);
+			else if (event->type == LEFTMOUSE || event->val != KM_DBL_CLICK)
+				retval = ui_handle_menu_event(C, event, menu, level, is_parent_inside, is_parent_menu, is_floating);
 		}
 	}
 
@@ -8698,12 +9083,12 @@ static void ui_handler_remove_popup(bContext *C, void *userdata)
 void UI_add_region_handlers(ListBase *handlers)
 {
 	WM_event_remove_ui_handler(handlers, ui_handler_region, ui_handler_remove_region, NULL, false);
-	WM_event_add_ui_handler(NULL, handlers, ui_handler_region, ui_handler_remove_region, NULL);
+	WM_event_add_ui_handler(NULL, handlers, ui_handler_region, ui_handler_remove_region, NULL, false);
 }
 
-void UI_add_popup_handlers(bContext *C, ListBase *handlers, uiPopupBlockHandle *popup)
+void UI_add_popup_handlers(bContext *C, ListBase *handlers, uiPopupBlockHandle *popup, const bool accept_dbl_click)
 {
-	WM_event_add_ui_handler(C, handlers, ui_handler_popup, ui_handler_remove_popup, popup);
+	WM_event_add_ui_handler(C, handlers, ui_handler_popup, ui_handler_remove_popup, popup, accept_dbl_click);
 }
 
 void UI_remove_popup_handlers(ListBase *handlers, uiPopupBlockHandle *popup)

source/blender/editors/interface/interface_intern.h

@@ -88,6 +88,7 @@ typedef enum {
 	
 	UI_WTYPE_PULLDOWN,
 	UI_WTYPE_MENU_ITEM,
+	UI_WTYPE_MENU_ITEM_RADIAL,
 	UI_WTYPE_MENU_BACK,
 
 	/* specials */
@@ -121,6 +122,24 @@ enum {
 	/* warn: rest of uiBut->flag in UI_interface.h */
 };
 
+/* but->pie_dir */
+typedef enum RadialDirection {
+	UI_RADIAL_NONE  = -1,
+	UI_RADIAL_N     =  0,
+	UI_RADIAL_NE    =  1,
+	UI_RADIAL_E     =  2,
+	UI_RADIAL_SE    =  3,
+	UI_RADIAL_S     =  4,
+	UI_RADIAL_SW    =  5,
+	UI_RADIAL_W     =  6,
+	UI_RADIAL_NW    =  7,
+} RadialDirection;
+
+extern const char  ui_radial_dir_order[8];
+extern const char  ui_radial_dir_to_numpad[8];
+extern const short ui_radial_dir_to_angle_visual[8];
+extern const short ui_radial_dir_to_angle[8];
+
 /* internal panel drawing defines */
 #define PNL_GRID    (UI_UNIT_Y / 5) /* 4 default */
 #define PNL_HEADER  (UI_UNIT_Y + 4) /* 24 default */
@@ -144,6 +163,19 @@ enum {
 /* split numbuts by ':' and align l/r */
 #define USE_NUMBUTS_LR_ALIGN
 
+/* PieMenuData->flags */
+enum {
+	UI_PIE_DEGREES_RANGE_LARGE  = (1 << 0),  /* pie menu item collision is detected at 90 degrees */
+	UI_PIE_INITIAL_DIRECTION    = (1 << 1),  /* use initial center of pie menu to calculate direction */
+	UI_PIE_3_ITEMS              = (1 << 2),  /* pie menu has only 3 items, careful when centering */
+	UI_PIE_INVALID_DIR          = (1 << 3),  /* mouse not far enough from center position  */
+	UI_PIE_FINISHED             = (1 << 4),  /* pie menu finished but we still wait for a release event  */
+	UI_PIE_CLICK_STYLE          = (1 << 5),  /* pie menu changed to click style, click to confirm  */
+	UI_PIE_ANIMATION_FINISHED   = (1 << 6),  /* pie animation finished, do not calculate any more motio  */
+};
+
+#define PIE_CLICK_THRESHOLD_SQ 50.0f
+
 typedef struct uiLinkLine {  /* only for draw/edit */
 	struct uiLinkLine *next, *prev;
 	struct uiBut *from, *to;
@@ -227,6 +259,7 @@ struct uiBut {
 	BIFIconID icon;
 	bool lock;
 	char dt; /* drawtype: UI_EMBOSS, UI_EMBOSSN ... etc, copied from the block */
+	signed char pie_dir; /* direction in a pie menu, used for collision detection (RadialDirection) */
 	char changed; /* could be made into a single flag */
 	unsigned char unit_type; /* so buttons can support unit systems which are not RNA */
 	short modifier_key;
@@ -274,6 +307,15 @@ struct uiBut {
 	uiBlock *block;
 };
 
+struct PieMenuData {
+	float pie_dir[2];
+	float pie_center_init[2];
+	float pie_center_spawned[2];
+	int flags;
+	int event; /* initial event used to fire the pie menu, store here so we can query for release */
+	float alphafac;
+};
+
 struct uiBlock {
 	uiBlock *next, *prev;
 
@@ -356,6 +398,7 @@ struct uiBlock {
 	char display_device[64]; /* display device name used to display this block,
 	                          * used by color widgets to transform colors from/to scene linear
 	                          */
+	struct PieMenuData pie_data;
 };
 
 typedef struct uiSafetyRct {
@@ -561,6 +604,9 @@ extern int ui_button_open_menu_direction(uiBut *but);
 extern void ui_button_text_password_hide(char password_str[UI_MAX_DRAW_STR], uiBut *but, const bool restore);
 extern uiBut *ui_but_find_activated(struct ARegion *ar);
 bool ui_but_is_editable(const uiBut *but);
+void ui_but_pie_dir_visual(RadialDirection dir, float vec[2]);
+void ui_but_pie_dir(RadialDirection dir, float vec[2]);
+void ui_block_calculate_pie_segment(struct uiBlock *block, const float event_xy[2]);
 
 void ui_button_clipboard_free(void);
 void ui_panel_menu(struct bContext *C, ARegion *ar, Panel *pa);
@@ -571,6 +617,7 @@ uiBut *ui_but_find_new(uiBlock *block_old, const uiBut *but_new);
 void ui_draw_anti_tria(float x1, float y1, float x2, float y2, float x3, float y3);
 void ui_draw_anti_roundbox(int mode, float minx, float miny, float maxx, float maxy, float rad, bool use_alpha);
 void ui_draw_menu_back(struct uiStyle *style, uiBlock *block, rcti *rect);
+void ui_draw_pie_center(uiBlock *block);
 uiWidgetColors *ui_tooltip_get_theme(void);
 void ui_draw_tooltip_background(uiStyle *UNUSED(style), uiBlock *block, rcti *rect);
 void ui_draw_search_back(struct uiStyle *style, uiBlock *block, rcti *rect);

source/blender/editors/interface/interface_layout.c

@@ -106,6 +106,7 @@ typedef enum uiItemType {
 	ITEM_LAYOUT_ABSOLUTE,
 	ITEM_LAYOUT_SPLIT,
 	ITEM_LAYOUT_OVERLAP,
+	ITEM_LAYOUT_RADIAL,
 
 	ITEM_LAYOUT_ROOT
 #if 0
@@ -218,7 +219,9 @@ static int ui_item_fit(int item, int pos, int all, int available, int last, int
 
 static int ui_layout_vary_direction(uiLayout *layout)
 {
-	return (layout->root->type == UI_LAYOUT_HEADER || layout->alignment != UI_LAYOUT_ALIGN_EXPAND) ? UI_ITEM_VARY_X : UI_ITEM_VARY_Y;
+	return ((ELEM(layout->root->type, UI_LAYOUT_HEADER, UI_LAYOUT_PIEMENU) ||
+	        (layout->alignment != UI_LAYOUT_ALIGN_EXPAND)) ?
+	        UI_ITEM_VARY_X : UI_ITEM_VARY_Y);
 }
 
 /* estimated size of text + icon */
@@ -553,15 +556,24 @@ static void ui_item_enum_expand(uiLayout *layout, uiBlock *block, PointerRNA *pt
 	 */
 
 	uiBut *but;
+	uiLayout *layout_radial = NULL;
 	EnumPropertyItem *item, *item_array;
 	const char *name;
 	int itemw, icon, value;
 	bool free;
+	bool radial = (layout->root->type == UI_LAYOUT_PIEMENU);
 
-	RNA_property_enum_items_gettexted(block->evil_C, ptr, prop, &item_array, NULL, &free);
+	if (radial)
+		RNA_property_enum_items_gettexted_all(block->evil_C, ptr, prop, &item_array, NULL, &free);
+	else
+		RNA_property_enum_items_gettexted(block->evil_C, ptr, prop, &item_array, NULL, &free);
 
 	/* we dont want nested rows, cols in menus */
-	if (layout->root->type != UI_LAYOUT_MENU) {
+	if (radial) {
+		layout_radial = uiLayoutRadial(layout);
+		uiBlockSetCurLayout(block, layout_radial);
+	}
+	else if (layout->root->type != UI_LAYOUT_MENU) {
 		uiBlockSetCurLayout(block, ui_item_local_sublayout(layout, layout, 1));
 	}
 	else {
@@ -569,8 +581,11 @@ static void ui_item_enum_expand(uiLayout *layout, uiBlock *block, PointerRNA *pt
 	}
 
 	for (item = item_array; item->identifier; item++) {
-		if (!item->identifier[0])
+		if (!item->identifier[0]) {
+			if (radial)
+				uiItemS(layout_radial);
 			continue;
+		}
 
 		name = (!uiname || uiname[0]) ? item->name : "";
 		icon = item->icon;
@@ -869,6 +884,8 @@ void uiItemsFullEnumO(uiLayout *layout, const char *opname, const char *propname
 	PointerRNA ptr;
 	PropertyRNA *prop;
 	uiBlock *block = layout->root->block;
+	const bool radial = (layout->item.type == ITEM_LAYOUT_RADIAL) ||
+	                     ((layout->item.type == ITEM_LAYOUT_ROOT) && (layout->root->type == UI_LAYOUT_PIEMENU));
 
 	if (!ot || !ot->srna) {
 		ui_item_disabled(layout, opname);
@@ -887,10 +904,24 @@ void uiItemsFullEnumO(uiLayout *layout, const char *opname, const char *propname
 	if (prop && RNA_property_type(prop) == PROP_ENUM) {
 		EnumPropertyItem *item, *item_array = NULL;
 		bool free;
-		uiLayout *split = uiLayoutSplit(layout, 0.0f, false);
-		uiLayout *column = uiLayoutColumn(split, layout->align);
+		uiLayout *split;
+		uiLayout *target;
+
+		if (radial) {
+			target = uiLayoutRadial(layout);
+		}
+		else {
+			split = uiLayoutSplit(layout, 0.0f, false);
+			target = uiLayoutColumn(split, layout->align);
+		}
+
+		if (radial) {
+			RNA_property_enum_items_gettexted_all(block->evil_C, &ptr, prop, &item_array, NULL, &free);
+		}
+		else {
+			RNA_property_enum_items_gettexted(block->evil_C, &ptr, prop, &item_array, NULL, &free);
+		}
 
-		RNA_property_enum_items_gettexted(block->evil_C, &ptr, prop, &item_array, NULL, &free);
 		for (item = item_array; item->identifier; item++) {
 			if (item->identifier[0]) {
 				PointerRNA tptr;
@@ -905,20 +936,24 @@ void uiItemsFullEnumO(uiLayout *layout, const char *opname, const char *propname
 				}
 				RNA_property_enum_set(&tptr, prop, item->value);
 
-				uiItemFullO_ptr(column, ot, item->name, item->icon, tptr.data, context, flag);
+				uiItemFullO_ptr(target, ot, item->name, item->icon, tptr.data, context, flag);
+
 				ui_but_tip_from_enum_item(block->buttons.last, item);
 			}
 			else {
 				if (item->name) {
 					uiBut *but;
-					if (item != item_array) {
-						column = uiLayoutColumn(split, layout->align);
+
+					if (item != item_array && !radial) {
+						target = uiLayoutColumn(split, layout->align);
+
 						/* inconsistent, but menus with labels do not look good flipped */
 						block->flag |= UI_BLOCK_NO_FLIP;
 					}
 
-					if (item->icon) {
-						uiItemL(column, item->name, item->icon);
+					if (item->icon || radial) {
+						uiItemL(target, item->name, item->icon);
+
 						but = block->buttons.last;
 					}
 					else {
@@ -928,8 +963,14 @@ void uiItemsFullEnumO(uiLayout *layout, const char *opname, const char *propname
 					}
 					ui_but_tip_from_enum_item(but, item);
 				}
-				else {  /* XXX bug here, colums draw bottom item badly */
-					uiItemS(column);
+				else {
+					if (radial) {
+						uiItemS(target);
+					}
+					else {
+						/* XXX bug here, colums draw bottom item badly */
+						uiItemS(target);
+					}
 				}
 			}
 		}
@@ -2072,16 +2113,135 @@ static void ui_litem_layout_column(uiLayout *litem)
 	litem->y = y;
 }
 
+/* calculates the angle of a specified button in a radial menu,
+ * stores a float vector in unit circle */
+static RadialDirection ui_get_radialbut_vec(float vec[2], short itemnum)
+{
+	RadialDirection dir;
+	BLI_assert(itemnum < 8);
+
+	dir = ui_radial_dir_order[itemnum];
+	ui_but_pie_dir_visual(dir, vec);
+
+	return dir;
+}
+
+static bool ui_item_is_radial_displayable(uiItem *item)
+{
+
+	if ((item->type == ITEM_BUTTON) && (((uiButtonItem *)item)->but->type == LABEL))
+		return false;
+
+	return true;
+}
+
+static bool ui_item_is_radial_drawable(uiButtonItem *bitem)
+{
+
+	if (ELEM(bitem->but->type, SEPR, SEPRLINE))
+		return false;
+
+	return true;
+}
+
+static void ui_litem_layout_radial(uiLayout *litem)
+{
+	uiItem *item;
+	int itemh, itemw, x, y;
+	int itemnum = 0;
+	int totitems = 0;
+
+	int minx, miny, maxx, maxy;
+	/* For the radial layout we will use Matt Ebb's design
+	 * for radiation, see http://mattebb.com/weblog/radiation/
+	 * also the old code at http://developer.blender.org/T5103
+	 */
+
+	int pie_radius = U.pie_menu_radius * UI_DPI_FAC;
+
+	x = litem->x;
+	y = litem->y;
+
+	minx = x, miny = y, maxx = x, maxy = y;
+
+	/* first count total items */
+	for (item = litem->items.first; item; item = item->next)
+		totitems++;
+
+	if (totitems < 5)
+		litem->root->block->pie_data.flags |= UI_PIE_DEGREES_RANGE_LARGE;
+
+	if (totitems == 3)
+		litem->root->block->pie_data.flags |= UI_PIE_3_ITEMS;
+
+	for (item = litem->items.first; item; item = item->next) {
+		/* not all button types are drawn in a radial menu, do filtering here */
+		if (ui_item_is_radial_displayable(item)) {
+			RadialDirection dir;
+			float vec[2];
+
+			dir = ui_get_radialbut_vec(vec, itemnum);
+
+			itemnum++;
+
+			if (item->type == ITEM_BUTTON) {
+				uiButtonItem *bitem = (uiButtonItem *) item;
+
+				bitem->but->pie_dir = dir;
+				/* scale the buttons */
+				bitem->but->rect.ymax *= 1.5f;
+				/* add a little bit more here to include number */
+				bitem->but->rect.xmax += 1.5f * UI_UNIT_X;
+				/* enable drawing as pie item if supported by widget */
+				if (ui_item_is_radial_drawable(bitem))
+					bitem->but->dt = UI_EMBOSSR;
+			}
+
+			ui_item_size(item, &itemw, &itemh);
+
+			ui_item_position(item, x + vec[0] * pie_radius - itemw / 2, y + vec[1] * pie_radius - itemh / 2, itemw, itemh);
+
+			minx = min_ii(minx, x + vec[0] * pie_radius - itemw / 2);
+			maxx = max_ii(maxx, x + vec[0] * pie_radius + itemw / 2);
+			miny = min_ii(miny, y + vec[1] * pie_radius - itemh / 2);
+			maxy = max_ii(maxy, y + vec[1] * pie_radius + itemh / 2);
+		}
+	}
+
+	litem->x = minx;
+	litem->y = miny;
+	litem->w = maxx - minx;
+	litem->h = maxy - miny;
+}
+
 /* root layout */
 static void ui_litem_estimate_root(uiLayout *UNUSED(litem))
 {
 	/* nothing to do */
 }
 
+static void ui_litem_layout_root_radial(uiLayout *litem)
+{
+	/* first item is pie menu title, align on center of menu */
+	uiItem *item = litem->items.first;
+
+	if (item->type == ITEM_BUTTON) {
+		int itemh, itemw, x, y;
+		x = litem->x;
+		y = litem->y;
+
+		ui_item_size(item, &itemw, &itemh);
+
+		ui_item_position(item, x - itemw / 2, y + 2 * UI_UNIT_Y, itemw, itemh);
+	}
+}
+
 static void ui_litem_layout_root(uiLayout *litem)
 {
 	if (litem->root->type == UI_LAYOUT_HEADER)
 		ui_litem_layout_row(litem);
+	else if (litem->root->type == UI_LAYOUT_PIEMENU)
+		ui_litem_layout_root_radial(litem);
 	else
 		ui_litem_layout_column(litem);
 }
@@ -2497,6 +2657,40 @@ static uiLayoutItemBx *ui_layout_box(uiLayout *layout, int type)
 	return box;
 }
 
+uiLayout *uiLayoutRadial(uiLayout *layout)
+{
+	uiLayout *litem;
+	uiItem *item;
+
+	/* radial layouts are only valid for radial menus */
+	if (layout->root->type != UI_LAYOUT_PIEMENU)
+		return ui_item_local_sublayout(layout, layout, 0);
+
+	/* only one radial wheel per root layout is allowed, so check and return that, if it exists */
+	for (item = layout->root->layout->items.first; item; item = item->next) {
+		litem = (uiLayout *)item;
+		if (litem->item.type == ITEM_LAYOUT_RADIAL) {
+			uiBlockSetCurLayout(layout->root->block, litem);
+			return litem;
+		}
+	}
+
+	litem = MEM_callocN(sizeof(uiLayout), "uiLayoutRadial");
+	litem->item.type = ITEM_LAYOUT_RADIAL;
+	litem->root = layout->root;
+	litem->active = true;
+	litem->enabled = true;
+	litem->context = layout->context;
+	litem->redalert = layout->redalert;
+	litem->w = layout->w;
+	BLI_addtail(&layout->root->layout->items, litem);
+
+	uiBlockSetCurLayout(layout->root->block, litem);
+
+	return litem;
+}
+
+
 uiLayout *uiLayoutBox(uiLayout *layout)
 {
 	return (uiLayout *)ui_layout_box(layout, ROUNDBOX);
@@ -2843,6 +3037,9 @@ static void ui_item_layout(uiItem *item)
 			case ITEM_LAYOUT_OVERLAP:
 				ui_litem_layout_overlap(litem);
 				break;
+			case ITEM_LAYOUT_RADIAL:
+				ui_litem_layout_radial(litem);
+				break;
 			default:
 				break;
 		}
@@ -2916,7 +3113,7 @@ uiLayout *uiBlockLayout(uiBlock *block, int dir, int type, int x, int y, int siz
 	layout->enabled = 1;
 	layout->context = NULL;
 
-	if (type == UI_LAYOUT_MENU)
+	if (type == UI_LAYOUT_MENU || type == UI_LAYOUT_PIEMENU)
 		layout->space = 0;
 
 	if (dir == UI_LAYOUT_HORIZONTAL) {

source/blender/editors/interface/interface_panel.c

@@ -1912,7 +1912,7 @@ static void panel_activate_state(const bContext *C, Panel *pa, uiHandlePanelStat
 			data = MEM_callocN(sizeof(uiHandlePanelData), "uiHandlePanelData");
 			pa->activedata = data;
 
-			WM_event_add_ui_handler(C, &win->modalhandlers, ui_handler_panel, ui_handler_remove_panel, pa);
+			WM_event_add_ui_handler(C, &win->modalhandlers, ui_handler_panel, ui_handler_remove_panel, pa, false);
 		}
 
 		if (ELEM(state, PANEL_STATE_ANIMATION, PANEL_STATE_DRAG))

source/blender/editors/interface/interface_regions.c

@@ -43,6 +43,8 @@
 #include "BLI_utildefines.h"
 #include "BLI_ghash.h"
 
+#include "PIL_time.h"
+
 #include "BKE_context.h"
 #include "BKE_screen.h"
 #include "BKE_report.h"
@@ -1704,18 +1706,69 @@ uiBlock *ui_popup_block_refresh(
 		BLI_addhead(&block->saferct, saferct);
 	}
 
-	/* clip block with window boundary */
-	ui_popup_block_clip(window, block);
-	
-	/* the block and buttons were positioned in window space as in 2.4x, now
-	 * these menu blocks are regions so we bring it back to region space.
-	 * additionally we add some padding for the menu shadow or rounded menus */
-	ar->winrct.xmin = block->rect.xmin - width;
-	ar->winrct.xmax = block->rect.xmax + width;
-	ar->winrct.ymin = block->rect.ymin - width;
-	ar->winrct.ymax = block->rect.ymax + MENU_TOP;
-	
-	ui_block_translate(block, -ar->winrct.xmin, -ar->winrct.ymin);
+	if (block->flag & UI_BLOCK_RADIAL) {
+		uiBut *but;
+		int win_width = UI_SCREEN_MARGIN;
+		int winx, winy;
+
+		int x_offset = 0, y_offset = 0;
+
+		winx = WM_window_pixels_x(window);
+		winy = WM_window_pixels_y(window);
+
+		copy_v2_v2(block->pie_data.pie_center_init, block->pie_data.pie_center_spawned);
+
+		/* only try translation if area is large enough */
+		if (BLI_rctf_size_x(&block->rect) < winx - (2.0f * win_width)) {
+			if (block->rect.xmin < win_width )   x_offset += win_width - block->rect.xmin;
+			if (block->rect.xmax > winx - win_width) x_offset += winx - win_width - block->rect.xmax;
+		}
+
+		if (BLI_rctf_size_y(&block->rect) < winy - (2.0f * win_width)) {
+			if (block->rect.ymin < win_width )   y_offset += win_width - block->rect.ymin;
+			if (block->rect.ymax > winy - win_width) y_offset += winy - win_width - block->rect.ymax;
+		}
+		/* if we are offsetting set up initial data for timeout functionality */
+
+		if ((x_offset != 0) || (y_offset != 0)) {
+			block->pie_data.pie_center_spawned[0] += x_offset;
+			block->pie_data.pie_center_spawned[1] += y_offset;
+
+			ui_block_translate(block, x_offset, y_offset);
+
+			if (U.pie_initial_timeout > 0)
+				block->pie_data.flags |= UI_PIE_INITIAL_DIRECTION;
+		}
+
+		ar->winrct.xmin = 0;
+		ar->winrct.xmax = winx;
+		ar->winrct.ymin = 0;
+		ar->winrct.ymax = winy;
+
+		ui_block_calculate_pie_segment(block, block->pie_data.pie_center_init);
+
+		/* lastly set the buttons at the center of the pie menu, ready for animation */
+		if (U.pie_animation_timeout > 0) {
+			for (but = block->buttons.first; but; but = but->next) {
+				if (but->pie_dir != UI_RADIAL_NONE) {
+					BLI_rctf_recenter(&but->rect, UNPACK2(block->pie_data.pie_center_spawned));
+				}
+			}
+		}
+	}
+	else {
+		/* clip block with window boundary */
+		ui_popup_block_clip(window, block);
+		/* the block and buttons were positioned in window space as in 2.4x, now
+		 * these menu blocks are regions so we bring it back to region space.
+		 * additionally we add some padding for the menu shadow or rounded menus */
+		ar->winrct.xmin = block->rect.xmin - width;
+		ar->winrct.xmax = block->rect.xmax + width;
+		ar->winrct.ymin = block->rect.ymin - width;
+		ar->winrct.ymax = block->rect.ymax + MENU_TOP;
+
+		ui_block_translate(block, -ar->winrct.xmin, -ar->winrct.ymin);
+	}
 
 	if (block_old) {
 		block->oldblock = block_old;
@@ -2353,6 +2406,12 @@ struct uiPopupMenu {
 	void *menu_arg;
 };
 
+struct uiPieMenu {
+	uiBlock *block_radial; /* radial block of the pie menu (more could be added later) */
+	uiLayout *layout;
+	int mx, my;
+};
+
 static uiBlock *ui_block_func_POPUP(bContext *C, uiPopupBlockHandle *handle, void *arg_pup)
 {
 	uiBlock *block;
@@ -2526,7 +2585,7 @@ uiPopupBlockHandle *ui_popup_menu_create(bContext *C, ARegion *butregion, uiBut
 	if (!but) {
 		handle->popup = true;
 
-		UI_add_popup_handlers(C, &window->modalhandlers, handle);
+		UI_add_popup_handlers(C, &window->modalhandlers, handle, false);
 		WM_event_add_mousemove(C);
 	}
 	
@@ -2588,7 +2647,7 @@ void uiPupMenuEnd(bContext *C, uiPopupMenu *pup)
 	menu = ui_popup_block_create(C, NULL, NULL, NULL, ui_block_func_POPUP, pup);
 	menu->popup = true;
 	
-	UI_add_popup_handlers(C, &window->modalhandlers, menu);
+	UI_add_popup_handlers(C, &window->modalhandlers, menu, false);
 	WM_event_add_mousemove(C);
 	
 	MEM_freeN(pup);
@@ -2599,6 +2658,175 @@ uiLayout *uiPupMenuLayout(uiPopupMenu *pup)
 	return pup->layout;
 }
 
+/*************************** Pie Menus ***************************************/
+
+static uiBlock *ui_block_func_PIE(bContext *UNUSED(C), uiPopupBlockHandle *handle, void *arg_pie)
+{
+	uiBlock *block;
+	uiPieMenu *pie = arg_pie;
+	int minwidth, width, height;
+
+	minwidth = 50;
+	block = pie->block_radial;
+
+	/* in some cases we create the block before the region,
+	 * so we set it delayed here if necessary */
+	if (BLI_findindex(&handle->region->uiblocks, block) == -1)
+		uiBlockSetRegion(block, handle->region);
+
+	uiBlockLayoutResolve(block, &width, &height);
+
+	uiBlockSetFlag(block, UI_BLOCK_LOOP | UI_BLOCK_REDRAW | UI_BLOCK_NUMSELECT);
+
+	block->minbounds = minwidth;
+	block->bounds = 1;
+	block->mx = 0;
+	block->my = 0;
+	block->bounds_type = UI_BLOCK_BOUNDS_PIE_CENTER;
+
+	block->pie_data.pie_center_spawned[0] = pie->mx;
+	block->pie_data.pie_center_spawned[1] = pie->my;
+
+	return pie->block_radial;
+}
+
+static float uiPieTitleWidth(const char *name, int icon)
+{
+	return (UI_GetStringWidth(name) +
+	         (UI_UNIT_X * (1.50f + (icon ? 0.25f : 0.0f))));
+}
+
+uiPieMenu *uiPieMenuBegin(struct bContext *C, const char *title, int icon, const wmEvent *event)
+{
+	uiStyle *style = UI_GetStyleDraw();
+	uiPieMenu *pie = MEM_callocN(sizeof(uiPopupMenu), "pie menu");
+
+	pie->block_radial = uiBeginBlock(C, NULL, __func__, UI_EMBOSS);
+	/* may be useful later to allow spawning pies
+	 * from old positions */
+	/* pie->block_radial->flag |= UI_BLOCK_POPUP_MEMORY; */
+	pie->block_radial->puphash = ui_popup_menu_hash(title);
+	pie->block_radial->flag |= UI_BLOCK_RADIAL;
+	pie->block_radial->pie_data.event = event->type;
+
+	pie->layout = uiBlockLayout(pie->block_radial, UI_LAYOUT_VERTICAL, UI_LAYOUT_PIEMENU, 0, 0, 200, 0, 0, style);
+	pie->mx = event->x;
+	pie->my = event->y;
+
+	/* create title button */
+	if (title[0]) {
+		char titlestr[256];
+		int w;
+		if (icon) {
+			BLI_snprintf(titlestr, sizeof(titlestr), " %s", title);
+			w = uiPieTitleWidth(titlestr, icon);
+			uiDefIconTextBut(pie->block_radial, LABEL, 0, icon, titlestr, 0, 0, w, UI_UNIT_Y, NULL, 0.0, 0.0, 0, 0, "");
+		}
+		else {
+			w = uiPieTitleWidth(title, 0);
+			uiDefBut(pie->block_radial, LABEL, 0, title, 0, 0, w, UI_UNIT_Y, NULL, 0.0, 0.0, 0, 0, "");
+		}
+	}
+
+	return pie;
+}
+
+void uiPieMenuEnd(bContext *C, uiPieMenu *pie)
+{
+	wmWindow *window = CTX_wm_window(C);
+	uiPopupBlockHandle *menu;
+
+	menu = ui_popup_block_create(C, NULL, NULL, NULL, ui_block_func_PIE, pie);
+	menu->popup = true;
+	menu->towardstime = PIL_check_seconds_timer();
+
+	UI_add_popup_handlers(C, &window->modalhandlers, menu, true);
+	WM_event_add_mousemove(C);
+
+	MEM_freeN(pie);
+}
+
+uiLayout *uiPieMenuLayout(uiPieMenu *pie)
+{
+	return pie->layout;
+}
+
+void uiPieMenuInvoke(struct bContext *C, const char *idname, const wmEvent *event)
+{
+	uiPieMenu *pie;
+	uiLayout *layout;
+	Menu menu;
+	MenuType *mt = WM_menutype_find(idname, true);
+
+	if (mt == NULL) {
+		printf("%s: named menu \"%s\" not found\n", __func__, idname);
+		return;
+	}
+
+	if (mt->poll && mt->poll(C, mt) == 0)
+		return;
+
+	pie = uiPieMenuBegin(C, IFACE_(mt->label), ICON_NONE, event);
+	layout = uiPieMenuLayout(pie);
+
+	menu.layout = layout;
+	menu.type = mt;
+
+	if (G.debug & G_DEBUG_WM) {
+		printf("%s: opening menu \"%s\"\n", __func__, idname);
+	}
+
+	mt->draw(C, &menu);
+
+	uiPieMenuEnd(C, pie);
+}
+
+void uiPieOperatorEnumInvoke(struct bContext *C, const char *title, const char *opname,
+                             const char *propname, const wmEvent *event)
+{
+	uiPieMenu *pie;
+	uiLayout *layout;
+
+	pie = uiPieMenuBegin(C, IFACE_(title), ICON_NONE, event);
+	layout = uiPieMenuLayout(pie);
+
+	layout = uiLayoutRadial(layout);
+	uiItemsEnumO(layout, opname, propname);
+
+	uiPieMenuEnd(C, pie);
+}
+
+void uiPieEnumInvoke(struct bContext *C, const char *title, const char *path,
+                     const wmEvent *event)
+{
+	PointerRNA ctx_ptr;
+	PointerRNA r_ptr;
+	PropertyRNA *r_prop;
+	uiPieMenu *pie;
+	uiLayout *layout;
+
+	RNA_pointer_create(NULL, &RNA_Context, C, &ctx_ptr);
+
+	if (!RNA_path_resolve(&ctx_ptr, path, &r_ptr, &r_prop)) {
+		return;
+	}
+
+	/* invalid property, only accept enums */
+	if (RNA_property_type(r_prop) != PROP_ENUM) {
+		BLI_assert(0);
+		return;
+	}
+
+	pie = uiPieMenuBegin(C, IFACE_(title), ICON_NONE, event);
+	layout = uiPieMenuLayout(pie);
+
+	layout = uiLayoutRadial(layout);
+	uiItemFullR(layout, &r_ptr, r_prop, RNA_NO_INDEX, 0, UI_ITEM_R_EXPAND, NULL, 0);
+
+	uiPieMenuEnd(C, pie);
+}
+
+
 /*************************** Standard Popup Menus ****************************/
 
 void uiPupMenuReports(bContext *C, ReportList *reports)
@@ -2695,7 +2923,7 @@ void uiPupBlockO(bContext *C, uiBlockCreateFunc func, void *arg, const char *opn
 	handle->optype = (opname) ? WM_operatortype_find(opname, 0) : NULL;
 	handle->opcontext = opcontext;
 	
-	UI_add_popup_handlers(C, &window->modalhandlers, handle);
+	UI_add_popup_handlers(C, &window->modalhandlers, handle, false);
 	WM_event_add_mousemove(C);
 }
 
@@ -2718,7 +2946,7 @@ void uiPupBlockEx(bContext *C, uiBlockCreateFunc func, uiBlockHandleFunc popup_f
 	handle->cancel_func = cancel_func;
 	// handle->opcontext = opcontext;
 	
-	UI_add_popup_handlers(C, &window->modalhandlers, handle);
+	UI_add_popup_handlers(C, &window->modalhandlers, handle, false);
 	WM_event_add_mousemove(C);
 }
 

source/blender/editors/interface/interface_widgets.c

@@ -1596,6 +1596,21 @@ static struct uiWidgetColors wcol_menu_back = {
 	25, -20
 };
 
+/* pie menus */
+static struct uiWidgetColors wcol_pie_menu = {
+	{10, 10, 10, 200},
+	{25, 25, 25, 230},
+	{140, 140, 140, 255},
+	{45, 45, 45, 230},
+
+	{160, 160, 160, 255},
+	{255, 255, 255, 255},
+
+	1,
+	10, -10
+};
+
+
 /* tooltip color */
 static struct uiWidgetColors wcol_tooltip = {
 	{0, 0, 0, 255},
@@ -1743,6 +1758,7 @@ void ui_widget_color_init(ThemeUI *tui)
 	tui->wcol_menu = wcol_menu;
 	tui->wcol_pulldown = wcol_pulldown;
 	tui->wcol_menu_back = wcol_menu_back;
+	tui->wcol_pie_menu = wcol_pie_menu;
 	tui->wcol_tooltip = wcol_tooltip;
 	tui->wcol_menu_item = wcol_menu_item;
 	tui->wcol_box = wcol_box;
@@ -1891,6 +1907,34 @@ static void widget_state_pulldown(uiWidgetType *wt, int state)
 		copy_v3_v3_char(wt->wcol.text, wt->wcol.text_sel);
 }
 
+/* special case, pie menu items */
+static void widget_state_pie_menu_item(uiWidgetType *wt, int state)
+{
+	wt->wcol = *(wt->wcol_theme);
+
+	/* active and disabled (not so common) */
+	if ((state & UI_BUT_DISABLED) && (state & UI_ACTIVE)) {
+		widget_state_blend(wt->wcol.text, wt->wcol.text_sel, 0.5f);
+		/* draw the backdrop at low alpha, helps navigating with keys
+		 * when disabled items are active */
+		copy_v4_v4_char(wt->wcol.inner, wt->wcol.item);
+		wt->wcol.inner[3] = 64;
+	}
+	/* regular disabled */
+	else if (state & (UI_BUT_DISABLED | UI_BUT_INACTIVE)) {
+		widget_state_blend(wt->wcol.text, wt->wcol.inner, 0.5f);
+	}
+	/* regular active */
+	else if (state & UI_SELECT) {
+		copy_v4_v4_char(wt->wcol.outline, wt->wcol.inner_sel);
+		copy_v3_v3_char(wt->wcol.text, wt->wcol.text_sel);
+	}
+	else if (state & UI_ACTIVE) {
+		copy_v4_v4_char(wt->wcol.inner, wt->wcol.item);
+		copy_v3_v3_char(wt->wcol.text, wt->wcol.text_sel);
+	}
+}
+
 /* special case, menu items */
 static void widget_state_menu_item(uiWidgetType *wt, int state)
 {
@@ -2973,6 +3017,29 @@ static void widget_menu_itembut(uiWidgetColors *wcol, rcti *rect, int UNUSED(sta
 	widgetbase_draw(&wtb, wcol);
 }
 
+static void widget_menu_radial_itembut(uiBut *but, uiWidgetColors *wcol, rcti *rect, int UNUSED(state), int UNUSED(roundboxalign))
+{
+	uiWidgetBase wtb;
+	float rad;
+	float fac = but->block->pie_data.alphafac;
+
+	widget_init(&wtb);
+
+	wtb.emboss = 0;
+
+	rad = 0.5f * BLI_rcti_size_y(rect);
+	round_box_edges(&wtb, UI_CNR_ALL, rect, rad);
+
+	wcol->inner[3] *= fac;
+	wcol->inner_sel[3] *= fac;
+	wcol->item[3] *= fac;
+	wcol->text[3] *= fac;
+	wcol->text_sel[3] *= fac;
+	wcol->outline[3] *= fac;
+
+	widgetbase_draw(&wtb, wcol);
+}
+
 static void widget_list_itembut(uiWidgetColors *wcol, rcti *rect, int UNUSED(state), int UNUSED(roundboxalign))
 {
 	uiWidgetBase wtb;
@@ -3291,6 +3358,12 @@ static uiWidgetType *widget_type(uiWidgetTypeEnum type)
 			wt.wcol_theme = &btheme->tui.wcol_progress;
 			wt.custom = widget_progressbar;
 			break;
+
+		case UI_WTYPE_MENU_ITEM_RADIAL:
+			wt.wcol_theme = &btheme->tui.wcol_pie_menu;
+			wt.custom = widget_menu_radial_itembut;
+			wt.state = widget_state_pie_menu_item;
+			break;
 	}
 	
 	return &wt;
@@ -3397,6 +3470,9 @@ void ui_draw_but(const bContext *C, ARegion *ar, uiStyle *style, uiBut *but, rct
 		/* "nothing" */
 		wt = widget_type(UI_WTYPE_ICON);
 	}
+	else if (but->dt == UI_EMBOSSR) {
+		wt = widget_type(UI_WTYPE_MENU_ITEM_RADIAL);
+	}
 	else {
 		
 		switch (but->type) {
@@ -3649,6 +3725,125 @@ void ui_draw_menu_back(uiStyle *UNUSED(style), uiBlock *block, rcti *rect)
 	}
 }
 
+static void draw_disk_shaded(
+        float start, float angle,
+        float radius_int, float radius_ext, int subd,
+        const char col1[4], const char col2[4],
+        bool shaded)
+{
+	const float radius_ext_scale = (0.5f / radius_ext);  /* 1 / (2 * radius_ext) */
+	int i;
+
+	float s, c;
+	float y1, y2;
+	float fac;
+	unsigned char r_col[4];
+
+	glBegin(GL_TRIANGLE_STRIP);
+
+	s = sinf(start);
+	c = cosf(start);
+
+	y1 = s * radius_int;
+	y2 = s * radius_ext;
+
+	if (shaded) {
+		fac = (y1 + radius_ext) * radius_ext_scale;
+		round_box_shade_col4_r(r_col, col1, col2, fac);
+
+		glColor4ubv(r_col);
+	}
+
+	glVertex2f(c * radius_int, s * radius_int);
+
+	if (shaded) {
+		fac = (y2 + radius_ext) * radius_ext_scale;
+		round_box_shade_col4_r(r_col, col1, col2, fac);
+
+		glColor4ubv(r_col);
+	}
+	glVertex2f(c * radius_ext, s * radius_ext);
+
+	for (i = 1; i < subd; i++) {
+		float a;
+
+		a = start + ((i) / (float)(subd - 1)) * angle;
+		s = sinf(a);
+		c = cosf(a);
+		y1 = s * radius_int;
+		y2 = s * radius_ext;
+
+		if (shaded) {
+			fac = (y1 + radius_ext) * radius_ext_scale;
+			round_box_shade_col4_r(r_col, col1, col2, fac);
+
+			glColor4ubv(r_col);
+		}
+		glVertex2f(c * radius_int, s * radius_int);
+
+		if (shaded) {
+			fac = (y2 + radius_ext) * radius_ext_scale;
+			round_box_shade_col4_r(r_col, col1, col2, fac);
+
+			glColor4ubv(r_col);
+		}
+		glVertex2f(c * radius_ext, s * radius_ext);
+	}
+	glEnd();
+
+}
+
+void ui_draw_pie_center(uiBlock *block)
+{
+	bTheme *btheme = UI_GetTheme();
+	float cx = block->pie_data.pie_center_spawned[0];
+	float cy = block->pie_data.pie_center_spawned[1];
+
+	float *pie_dir = block->pie_data.pie_dir;
+
+	float pie_radius_internal = U.pixelsize * U.pie_menu_threshold;
+	float pie_radius_external = U.pixelsize * (U.pie_menu_threshold + 7.0f);
+
+	int subd = 40;
+
+	float angle = atan2(pie_dir[1], pie_dir[0]);
+	float range = (block->pie_data.flags & UI_PIE_DEGREES_RANGE_LARGE) ? ((float)M_PI / 2.0f) : ((float)M_PI / 4.0f);
+
+	glPushMatrix();
+	glTranslatef(cx, cy, 0.0f);
+
+	glEnable(GL_BLEND);
+	if (btheme->tui.wcol_pie_menu.shaded) {
+		char col1[4], col2[4];
+		shadecolors4(col1, col2, btheme->tui.wcol_pie_menu.inner, btheme->tui.wcol_pie_menu.shadetop, btheme->tui.wcol_pie_menu.shadedown);
+		draw_disk_shaded(0.0f, (float)(M_PI * 2.0), pie_radius_internal, pie_radius_external, subd, col1, col2, true);
+	}
+	else {
+		glColor4ubv((GLubyte *)btheme->tui.wcol_pie_menu.inner);
+		draw_disk_shaded(0.0f, (float)(M_PI * 2.0), pie_radius_internal, pie_radius_external, subd, NULL, NULL, false);
+	}
+
+	if (!(block->pie_data.flags & UI_PIE_INVALID_DIR)) {
+		if (btheme->tui.wcol_pie_menu.shaded) {
+			char col1[4], col2[4];
+			shadecolors4(col1, col2, btheme->tui.wcol_pie_menu.inner_sel, btheme->tui.wcol_pie_menu.shadetop, btheme->tui.wcol_pie_menu.shadedown);
+			draw_disk_shaded(angle - range / 2.0f, range, pie_radius_internal, pie_radius_external, subd, col1, col2, true);
+		}
+		else {
+			glColor4ubv((GLubyte *)btheme->tui.wcol_pie_menu.inner_sel);
+			draw_disk_shaded(angle - range / 2.0f, range, pie_radius_internal, pie_radius_external, subd, NULL, NULL, false);
+		}
+	}
+
+	glColor4ubv((GLubyte *)btheme->tui.wcol_pie_menu.outline);
+	glutil_draw_lined_arc(0.0f, (float)M_PI * 2.0f, pie_radius_internal, subd);
+	glutil_draw_lined_arc(0.0f, (float)M_PI * 2.0f, pie_radius_external, subd);
+
+	glDisable(GL_BLEND);
+	glPopMatrix();
+}
+
+
 uiWidgetColors *ui_tooltip_get_theme(void)
 {
 	uiWidgetType *wt = widget_type(UI_WTYPE_TOOLTIP);

source/blender/editors/interface/resources.c

@@ -2454,6 +2454,31 @@ void init_userdef_do_versions(void)
 		}
 	}
 
+	if (U.versionfile < 271 || (U.versionfile == 271 && U.subversionfile < 4)) {
+		bTheme *btheme;
+
+		struct uiWidgetColors wcol_pie_menu = {
+			{10, 10, 10, 200},
+			{25, 25, 25, 230},
+			{140, 140, 140, 255},
+			{45, 45, 45, 230},
+
+			{160, 160, 160, 255},
+			{255, 255, 255, 255},
+
+			1,
+			10, -10
+		};
+
+		U.pie_menu_radius = 150;
+		U.pie_menu_threshold = 12;
+		U.pie_animation_timeout = 6;
+
+		for (btheme = U.themes.first; btheme; btheme = btheme->next) {
+			btheme->tui.wcol_pie_menu = wcol_pie_menu;
+		}
+	}
+
 	if (U.pixelsize == 0.0f)
 		U.pixelsize = 1.0f;
 	

source/blender/editors/space_api/spacetypes.c

@@ -61,6 +61,7 @@
 #include "ED_space_api.h"
 #include "ED_sound.h"
 #include "ED_uvedit.h"
+#include "ED_view3d.h"
 #include "ED_mball.h"
 #include "ED_logic.h"
 #include "ED_clip.h"
@@ -130,8 +131,17 @@ void ED_spacetypes_init(void)
 			type->operatortypes();
 	}
 
-	/* Macros's must go last since they reference other operators
-	 * maybe we'll need to have them go after python operators too? */
+	/* register internal render callbacks */
+	ED_render_internal_init();
+}
+
+void ED_spacemacros_init(void)
+{
+	const ListBase *spacetypes;
+	SpaceType *type;
+
+	/* Macros's must go last since they reference other operators.
+	 * We need to have them go after python operators too */
 	ED_operatormacros_armature();
 	ED_operatormacros_mesh();
 	ED_operatormacros_metaball();
@@ -152,9 +162,6 @@ void ED_spacetypes_init(void)
 		if (type->dropboxes)
 			type->dropboxes();
 	}
-	
-	/* register internal render callbacks */
-	ED_render_internal_init();
 }
 
 /* called in wm.c */

source/blender/editors/space_view3d/view3d_edit.c

@@ -78,6 +78,7 @@
 #include "ED_view3d.h"
 #include "ED_sculpt.h"
 
+#include "UI_resources.h"
 
 #include "PIL_time.h" /* smoothview */
 
@@ -3550,13 +3551,13 @@ void VIEW3D_OT_zoom_camera_1_to_1(wmOperatorType *ot)
 /* ********************* Changing view operator ****************** */
 
 static EnumPropertyItem prop_view_items[] = {
+	{RV3D_VIEW_LEFT, "LEFT", ICON_TRIA_LEFT, "Left", "View From the Left"},
+	{RV3D_VIEW_RIGHT, "RIGHT", ICON_TRIA_RIGHT, "Right", "View From the Right"},
+	{RV3D_VIEW_BOTTOM, "BOTTOM", ICON_TRIA_DOWN, "Bottom", "View From the Bottom"},
+	{RV3D_VIEW_TOP, "TOP", ICON_TRIA_UP, "Top", "View From the Top"},
 	{RV3D_VIEW_FRONT, "FRONT", 0, "Front", "View From the Front"},
 	{RV3D_VIEW_BACK, "BACK", 0, "Back", "View From the Back"},
-	{RV3D_VIEW_LEFT, "LEFT", 0, "Left", "View From the Left"},
-	{RV3D_VIEW_RIGHT, "RIGHT", 0, "Right", "View From the Right"},
-	{RV3D_VIEW_TOP, "TOP", 0, "Top", "View From the Top"},
-	{RV3D_VIEW_BOTTOM, "BOTTOM", 0, "Bottom", "View From the Bottom"},
-	{RV3D_VIEW_CAMERA, "CAMERA", 0, "Camera", "View From the Active Camera"},
+	{RV3D_VIEW_CAMERA, "CAMERA", ICON_CAMERA_DATA, "Camera", "View From the Active Camera"},
 	{0, NULL, 0, NULL, NULL}
 };
 

source/blender/makesdna/DNA_userdef_types.h

@@ -162,7 +162,7 @@ typedef struct ThemeUI {
 	uiWidgetColors wcol_radio, wcol_option, wcol_toggle;
 	uiWidgetColors wcol_num, wcol_numslider;
 	uiWidgetColors wcol_menu, wcol_pulldown, wcol_menu_back, wcol_menu_item, wcol_tooltip;
-	uiWidgetColors wcol_box, wcol_scroll, wcol_progress, wcol_list_item;
+	uiWidgetColors wcol_box, wcol_scroll, wcol_progress, wcol_list_item, wcol_pie_menu;
 	
 	uiWidgetStateColors wcol_state;
 
@@ -534,6 +534,15 @@ typedef struct UserDef {
 	float fcu_inactive_alpha;	/* opacity of inactive F-Curves in F-Curve Editor */
 	float pixelsize;			/* private, set by GHOST, to multiply DPI with */
 
+	short pie_interaction_type;     /* if keeping a pie menu spawn button pressed after this time, it turns into
+	                             * a drag/release pie menu */
+	short pie_initial_timeout;  /* direction in the pie menu will always be calculated from the initial position
+	                             * within this time limit */
+	int pie_animation_timeout;
+	int pad2;
+	short pie_menu_radius;        /* pie menu radius */
+	short pie_menu_threshold;     /* pie menu distance from center before a direction is set */
+
 	struct WalkNavigation walk_navigation;
 } UserDef;
 

source/blender/makesrna/RNA_access.h

@@ -633,6 +633,7 @@ extern StructRNA RNA_TransformConstraint;
 extern StructRNA RNA_TransformSequence;
 extern StructRNA RNA_UILayout;
 extern StructRNA RNA_UIList;
+extern StructRNA RNA_UIPieMenu;
 extern StructRNA RNA_UIPopupMenu;
 extern StructRNA RNA_UVWarpModifier;
 extern StructRNA RNA_UVProjectModifier;
@@ -794,6 +795,8 @@ void RNA_property_enum_items(struct bContext *C, PointerRNA *ptr, PropertyRNA *p
                              EnumPropertyItem **item, int *r_totitem, bool *r_free);
 void RNA_property_enum_items_gettexted(struct bContext *C, PointerRNA *ptr, PropertyRNA *prop,
                                        EnumPropertyItem **r_item, int *r_totitem, bool *r_free);
+void RNA_property_enum_items_gettexted_all(struct bContext *C, PointerRNA *ptr, PropertyRNA *prop,
+                                       EnumPropertyItem **r_item, int *r_totitem, bool *r_free);
 bool RNA_property_enum_value(struct bContext *C, PointerRNA *ptr, PropertyRNA *prop, const char *identifier, int *r_value);
 bool RNA_property_enum_identifier(struct bContext *C, PointerRNA *ptr, PropertyRNA *prop, const int value, const char **identifier);
 bool RNA_property_enum_name(struct bContext *C, PointerRNA *ptr, PropertyRNA *prop, const int value, const char **name);

source/blender/makesrna/intern/rna_access.c

@@ -1249,12 +1249,9 @@ void RNA_property_enum_items(bContext *C, PointerRNA *ptr, PropertyRNA *prop, En
 	}
 }
 
-void RNA_property_enum_items_gettexted(bContext *C, PointerRNA *ptr, PropertyRNA *prop,
-                                       EnumPropertyItem **r_item, int *r_totitem, bool *r_free)
-{
-	RNA_property_enum_items(C, ptr, prop, r_item, r_totitem, r_free);
-
 #ifdef WITH_INTERNATIONAL
+static void property_enum_translate(PropertyRNA *prop, EnumPropertyItem **r_item, int *r_totitem, bool *r_free)
+{
 	if (!(prop->flag & PROP_ENUM_NO_TRANSLATE)) {
 		int i;
 
@@ -1300,9 +1297,71 @@ void RNA_property_enum_items_gettexted(bContext *C, PointerRNA *ptr, PropertyRNA
 
 		*r_item = nitem;
 	}
+}
+#endif
+
+void RNA_property_enum_items_gettexted(bContext *C, PointerRNA *ptr, PropertyRNA *prop,
+                                       EnumPropertyItem **r_item, int *r_totitem, bool *r_free)
+{
+	RNA_property_enum_items(C, ptr, prop, r_item, r_totitem, r_free);
+
+#ifdef WITH_INTERNATIONAL
+	property_enum_translate(prop, r_item, r_totitem, r_free);
 #endif
 }
 
+void RNA_property_enum_items_gettexted_all(bContext *C, PointerRNA *ptr, PropertyRNA *prop,
+                                       EnumPropertyItem **r_item, int *r_totitem, bool *r_free)
+{
+	EnumPropertyRNA *eprop = (EnumPropertyRNA *)rna_ensure_property(prop);
+	int mem_size = sizeof(EnumPropertyItem) * (eprop->totitem + 1);
+	/* first return all items */
+	*r_free = true;
+	*r_item = MEM_mallocN(mem_size, "enum_gettext_all");
+	 memcpy(*r_item, eprop->item, mem_size);
+
+	if (r_totitem)
+		*r_totitem = eprop->totitem;
+
+	if (eprop->itemf && (C != NULL || (prop->flag & PROP_ENUM_NO_CONTEXT))) {
+		EnumPropertyItem *item;
+		int i;
+		bool free = false;
+
+		if (prop->flag & PROP_ENUM_NO_CONTEXT)
+			item = eprop->itemf(NULL, ptr, prop, &free);
+		else
+			item = eprop->itemf(C, ptr, prop, &free);
+
+		/* any callbacks returning NULL should be fixed */
+		BLI_assert(item != NULL);
+
+		for (i = 0; i < eprop->totitem; i++) {
+			bool exists = false;
+			int i_fixed;
+
+			/* items that do not exist on list are returned, but have their names/identifiers NULLed out */
+			for (i_fixed = 0; item[i_fixed].identifier; i_fixed++) {
+				if (STREQ(item[i_fixed].identifier, (*r_item)[i].identifier)) {
+					exists = true;
+					break;
+				}
+			}
+
+			if (!exists) {
+				(*r_item)[i].name = NULL;
+				(*r_item)[i].identifier = "";
+			}
+		}
+
+		if (free)
+			MEM_freeN(item);
+	}
+
+#ifdef WITH_INTERNATIONAL
+	property_enum_translate(prop, r_item, r_totitem, r_free);
+#endif
+}
 
 bool RNA_property_enum_value(bContext *C, PointerRNA *ptr, PropertyRNA *prop, const char *identifier, int *r_value)
 {

source/blender/makesrna/intern/rna_object.c

@@ -61,12 +61,12 @@
 EnumPropertyItem object_mode_items[] = {
 	{OB_MODE_OBJECT, "OBJECT", ICON_OBJECT_DATAMODE, "Object Mode", ""},
 	{OB_MODE_EDIT, "EDIT", ICON_EDITMODE_HLT, "Edit Mode", ""},
+	{OB_MODE_POSE, "POSE", ICON_POSE_HLT, "Pose Mode", ""},
 	{OB_MODE_SCULPT, "SCULPT", ICON_SCULPTMODE_HLT, "Sculpt Mode", ""},
 	{OB_MODE_VERTEX_PAINT, "VERTEX_PAINT", ICON_VPAINT_HLT, "Vertex Paint", ""},
 	{OB_MODE_WEIGHT_PAINT, "WEIGHT_PAINT", ICON_WPAINT_HLT, "Weight Paint", ""},
 	{OB_MODE_TEXTURE_PAINT, "TEXTURE_PAINT", ICON_TPAINT_HLT, "Texture Paint", ""},
 	{OB_MODE_PARTICLE_EDIT, "PARTICLE_EDIT", ICON_PARTICLEMODE, "Particle Edit", ""},
-	{OB_MODE_POSE, "POSE", ICON_POSE_HLT, "Pose Mode", ""},
 	{0, NULL, 0, NULL, NULL}
 };
 

source/blender/makesrna/intern/rna_space.c

@@ -1784,11 +1784,11 @@ static void rna_def_space_view3d(BlenderRNA *brna)
 	PropertyRNA *prop;
 
 	static EnumPropertyItem manipulators_items[] = {
-		{V3D_MANIP_TRANSLATE, "TRANSLATE", ICON_MAN_TRANS, "Manipulator Translate",
+		{V3D_MANIP_TRANSLATE, "TRANSLATE", ICON_MAN_TRANS, "Translate",
 		                      "Use the manipulator for movement transformations"},
-		{V3D_MANIP_ROTATE, "ROTATE", ICON_MAN_ROT, "Manipulator Rotate",
+		{V3D_MANIP_ROTATE, "ROTATE", ICON_MAN_ROT, "Rotate",
 		                   "Use the manipulator for rotation transformations"},
-		{V3D_MANIP_SCALE, "SCALE", ICON_MAN_SCALE, "Manipulator Scale",
+		{V3D_MANIP_SCALE, "SCALE", ICON_MAN_SCALE, "Scale",
 		                  "Use the manipulator for scale transformations"},
 		{0, NULL, 0, NULL, NULL}
 	};

source/blender/makesrna/intern/rna_ui_api.c

@@ -462,6 +462,13 @@ void RNA_api_ui_layout(StructRNA *srna)
 	RNA_def_float(func, "percentage", 0.0f, 0.0f, 1.0f, "Percentage", "Percentage of width to split at", 0.0f, 1.0f);
 	RNA_def_boolean(func, "align", false, "", "Align buttons to each other");
 
+	/* radial/pie layout */
+	func = RNA_def_function(srna, "menu_pie", "uiLayoutRadial");
+	parm = RNA_def_pointer(func, "layout", "UILayout", "", "Sub-layout to put items in");
+	RNA_def_function_return(func, parm);
+	RNA_def_function_ui_description(func, "Sublayout. Items placed in this sublayout are placed "
+	                                "in a radial fashion around the menu center)");
+
 	/* Icon of a rna pointer */
 	func = RNA_def_function(srna, "icon", "rna_ui_get_rnaptr_icon");
 	parm = RNA_def_int(func, "icon_value", ICON_NONE, 0, INT_MAX, "", "Icon identifier", 0, INT_MAX);

source/blender/makesrna/intern/rna_userdef.c

@@ -953,6 +953,12 @@ static void rna_def_userdef_theme_ui(BlenderRNA *brna)
 	RNA_def_property_flag(prop, PROP_NEVER_NULL);
 	RNA_def_property_ui_text(prop, "Menu Backdrop Colors", "");
 	RNA_def_property_update(prop, 0, "rna_userdef_update");
+
+	prop = RNA_def_property(srna, "wcol_pie_menu", PROP_POINTER, PROP_NONE);
+	RNA_def_property_flag(prop, PROP_NEVER_NULL);
+	RNA_def_property_ui_text(prop, "Pie Menu Colors", "");
+	RNA_def_property_update(prop, 0, "rna_userdef_update");
+
 	prop = RNA_def_property(srna, "wcol_tooltip", PROP_POINTER, PROP_NONE);
 	RNA_def_property_flag(prop, PROP_NEVER_NULL);
 	RNA_def_property_ui_text(prop, "Tooltip Colors", "");
@@ -3208,6 +3214,26 @@ static void rna_def_userdef_view(BlenderRNA *brna)
 	RNA_def_property_ui_text(prop, "Sub Level Menu Open Delay",
 	                         "Time delay in 1/10 seconds before automatically opening sub level menus");
 
+	/* pie menus */
+	prop = RNA_def_property(srna, "pie_initial_timeout", PROP_INT, PROP_NONE);
+	RNA_def_property_range(prop, 0, 1000);
+	RNA_def_property_ui_text(prop, "Recenter Timeout",
+	                         "Pie menus will use the initial mouse position as center for this amount of time "
+	                         "(in 1/100ths of sec)");
+
+	prop = RNA_def_property(srna, "pie_animation_timeout", PROP_INT, PROP_NONE);
+	RNA_def_property_range(prop, 0, 1000);
+	RNA_def_property_ui_text(prop, "Animation Timeout",
+	                         "Time needed to fully animate the pie to unfolded state (in 1/100ths of sec)");
+
+	prop = RNA_def_property(srna, "pie_menu_radius", PROP_INT, PROP_PIXEL);
+	RNA_def_property_range(prop, 0, 1000);
+	RNA_def_property_ui_text(prop, "Radius", "Pie menu size in pixels");
+
+	prop = RNA_def_property(srna, "pie_menu_threshold", PROP_INT, PROP_PIXEL);
+	RNA_def_property_range(prop, 0, 1000);
+	RNA_def_property_ui_text(prop, "Threshold", "Distance from center needed before a selection can be made");
+
 	prop = RNA_def_property(srna, "use_quit_dialog", PROP_BOOLEAN, PROP_NONE);
 	RNA_def_property_boolean_sdna(prop, NULL, "uiflag", USER_QUIT_PROMPT);
 	RNA_def_property_ui_text(prop, "Prompt Quit",

source/blender/makesrna/intern/rna_wm.c

@@ -594,6 +594,17 @@ static PointerRNA rna_PopupMenu_layout_get(PointerRNA *ptr)
 	return rptr;
 }
 
+static PointerRNA rna_PieMenu_layout_get(PointerRNA *ptr)
+{
+	struct uiPieMenu *pie = ptr->data;
+	uiLayout *layout = uiPieMenuLayout(pie);
+
+	PointerRNA rptr;
+	RNA_pointer_create(ptr->id.data, &RNA_UILayout, layout, &rptr);
+
+	return rptr;
+}
+
 static void rna_Window_screen_set(PointerRNA *ptr, PointerRNA value)
 {
 	wmWindow *win = (wmWindow *)ptr->data;
@@ -1716,6 +1727,26 @@ static void rna_def_popupmenu(BlenderRNA *brna)
 	RNA_define_verify_sdna(1); /* not in sdna */
 }
 
+static void rna_def_piemenu(BlenderRNA *brna)
+{
+	StructRNA *srna;
+	PropertyRNA *prop;
+
+	srna = RNA_def_struct(brna, "UIPieMenu", NULL);
+	RNA_def_struct_ui_text(srna, "PieMenu", "");
+	RNA_def_struct_sdna(srna, "uiPieMenu");
+
+	RNA_define_verify_sdna(0); /* not in sdna */
+
+	/* could wrap more, for now this is enough */
+	prop = RNA_def_property(srna, "layout", PROP_POINTER, PROP_NONE);
+	RNA_def_property_struct_type(prop, "UILayout");
+	RNA_def_property_pointer_funcs(prop, "rna_PieMenu_layout_get",
+	                               NULL, NULL, NULL);
+
+	RNA_define_verify_sdna(1); /* not in sdna */
+}
+
 static void rna_def_window(BlenderRNA *brna)
 {
 	StructRNA *srna;
@@ -2078,6 +2109,7 @@ void RNA_def_wm(BlenderRNA *brna)
 	rna_def_event(brna);
 	rna_def_timer(brna);
 	rna_def_popupmenu(brna);
+	rna_def_piemenu(brna);
 	rna_def_window(brna);
 	rna_def_windowmanager(brna);
 	rna_def_keyconfig(brna);

source/blender/makesrna/intern/rna_wm_api.c

@@ -310,6 +310,24 @@ static void rna_PupMenuEnd(bContext *C, PointerRNA *handle)
 	uiPupMenuEnd(C, handle->data);
 }
 
+/* pie menu wrapper */
+static PointerRNA rna_PieMenuBegin(bContext *C, const char *title, int icon, PointerRNA *event)
+{
+	PointerRNA r_ptr;
+	void *data;
+
+	data = (void *)uiPieMenuBegin(C, title, icon, event->data);
+
+	RNA_pointer_create(NULL, &RNA_UIPieMenu, data, &r_ptr);
+
+	return r_ptr;
+}
+
+static void rna_PieMenuEnd(bContext *C, PointerRNA *handle)
+{
+	uiPieMenuEnd(C, handle->data);
+}
+
 #else
 
 #define WM_GEN_INVOKE_EVENT (1 << 0)
@@ -461,6 +479,26 @@ void RNA_api_wm(StructRNA *srna)
 	RNA_def_function_flag(func, FUNC_NO_SELF | FUNC_USE_CONTEXT);
 	parm = RNA_def_pointer(func, "menu", "UIPopupMenu", "", "");
 	RNA_def_property_flag(parm, PROP_RNAPTR | PROP_NEVER_NULL);
+
+	/* wrap uiPieMenuBegin */
+	func = RNA_def_function(srna, "piemenu_begin__internal", "rna_PieMenuBegin");
+	RNA_def_function_flag(func, FUNC_NO_SELF | FUNC_USE_CONTEXT);
+	parm = RNA_def_string(func, "title", NULL, 0, "", "");
+	RNA_def_property_flag(parm, PROP_REQUIRED);
+	parm = RNA_def_property(func, "icon", PROP_ENUM, PROP_NONE);
+	RNA_def_property_enum_items(parm, icon_items);
+	parm = RNA_def_pointer(func, "event", "Event", "", "");
+	RNA_def_property_flag(parm, PROP_RNAPTR | PROP_NEVER_NULL);
+	/* return */
+	parm = RNA_def_pointer(func, "menu_pie", "UIPieMenu", "", "");
+	RNA_def_property_flag(parm, PROP_RNAPTR | PROP_NEVER_NULL);
+	RNA_def_function_return(func, parm);
+
+	/* wrap uiPieMenuEnd */
+	func = RNA_def_function(srna, "piemenu_end__internal", "rna_PieMenuEnd");
+	RNA_def_function_flag(func, FUNC_NO_SELF | FUNC_USE_CONTEXT);
+	parm = RNA_def_pointer(func, "menu", "UIPieMenu", "", "");
+	RNA_def_property_flag(parm, PROP_RNAPTR | PROP_NEVER_NULL);
 }
 
 void RNA_api_operator(StructRNA *srna)

source/blender/windowmanager/WM_api.h

@@ -151,7 +151,7 @@ typedef void (*wmUIHandlerRemoveFunc)(struct bContext *C, void *userdata);
 struct wmEventHandler *WM_event_add_ui_handler(
         const struct bContext *C, ListBase *handlers,
         wmUIHandlerFunc ui_handle, wmUIHandlerRemoveFunc ui_remove,
-        void *userdata);
+        void *userdata,  const bool accept_dbl_click);
 void WM_event_remove_ui_handler(
         ListBase *handlers,
         wmUIHandlerFunc ui_handle, wmUIHandlerRemoveFunc ui_remove,

source/blender/windowmanager/WM_keymap.h

@@ -64,6 +64,8 @@ wmKeyMapItem *WM_keymap_add_item(struct wmKeyMap *keymap, const char *idname, in
                                  int val, int modifier, int keymodifier);
 wmKeyMapItem *WM_keymap_add_menu(struct wmKeyMap *keymap, const char *idname, int type,
                                  int val, int modifier, int keymodifier);
+wmKeyMapItem *WM_keymap_add_menu_pie(struct wmKeyMap *keymap, const char *idname, int type,
+                                     int val, int modifier, int keymodifier, bool force_click);
 
 bool        WM_keymap_remove_item(struct wmKeyMap *keymap, struct wmKeyMapItem *kmi);
 int         WM_keymap_item_to_string(wmKeyMapItem *kmi, char *str, const int len);

source/blender/windowmanager/intern/wm_event_system.c

@@ -401,8 +401,12 @@ static int wm_handler_ui_call(bContext *C, wmEventHandler *handler, wmEvent *eve
 	
 	/* UI code doesn't handle return values - it just always returns break. 
 	 * to make the DBL_CLICK conversion work, we just don't send this to UI, except mouse clicks */
-	if (event->type != LEFTMOUSE && event->val == KM_DBL_CLICK)
+	if (((handler->flag & WM_HANDLER_ACCEPT_DBL_CLICK) == 0) &&
+	    (event->type != LEFTMOUSE) &&
+	    (event->val == KM_DBL_CLICK))
+	{
 		return WM_HANDLER_CONTINUE;
+	}
 	
 	/* UI is quite aggressive with swallowing events, like scrollwheel */
 	/* I realize this is not extremely nice code... when UI gets keymaps it can be maybe smarter */
@@ -2563,7 +2567,7 @@ void WM_event_remove_keymap_handler(ListBase *handlers, wmKeyMap *keymap)
 wmEventHandler *WM_event_add_ui_handler(
         const bContext *C, ListBase *handlers,
         wmUIHandlerFunc ui_handle, wmUIHandlerRemoveFunc ui_remove,
-        void *userdata)
+        void *userdata, const bool accept_dbl_click)
 {
 	wmEventHandler *handler = MEM_callocN(sizeof(wmEventHandler), "event ui handler");
 	handler->ui_handle = ui_handle;
@@ -2580,6 +2584,9 @@ wmEventHandler *WM_event_add_ui_handler(
 		handler->ui_menu    = NULL;
 	}
 
+	if (accept_dbl_click) {
+		handler->flag |= WM_HANDLER_ACCEPT_DBL_CLICK;
+	}
 	
 	BLI_addhead(handlers, handler);
 	

source/blender/windowmanager/intern/wm_init_exit.c

@@ -187,6 +187,8 @@ void WM_init(bContext *C, int argc, const char **argv)
 	(void)argv; /* unused */
 #endif
 
+	ED_spacemacros_init();
+
 	if (!G.background && !wm_start_with_console)
 		GHOST_toggleConsole(3);
 

source/blender/windowmanager/intern/wm_keymap.c

@@ -464,6 +464,14 @@ wmKeyMapItem *WM_keymap_add_menu(wmKeyMap *keymap, const char *idname, int type,
 	return kmi;
 }
 
+wmKeyMapItem *WM_keymap_add_menu_pie(wmKeyMap *keymap, const char *idname, int type, int val, int modifier, int keymodifier, bool force_click)
+{
+	wmKeyMapItem *kmi = WM_keymap_add_item(keymap, "WM_OT_call_menu_pie", type, val, modifier, keymodifier);
+	RNA_string_set(kmi->ptr, "name", idname);
+	RNA_boolean_set(kmi->ptr, "force_click", force_click);
+	return kmi;
+}
+
 bool WM_keymap_remove_item(wmKeyMap *keymap, wmKeyMapItem *kmi)
 {
 	if (BLI_findindex(&keymap->items, kmi) != -1) {

source/blender/windowmanager/intern/wm_operators.c

@@ -2049,6 +2049,41 @@ static void WM_OT_call_menu(wmOperatorType *ot)
 	RNA_def_string(ot->srna, "name", NULL, BKE_ST_MAXNAME, "Name", "Name of the menu");
 }
 
+static int wm_call_pie_menu_invoke(bContext *C, wmOperator *op, const wmEvent *event)
+{
+	char idname[BKE_ST_MAXNAME];
+	RNA_string_get(op->ptr, "name", idname);
+
+	uiPieMenuInvoke(C, idname, event);
+
+	return OPERATOR_CANCELLED;
+}
+
+static int wm_call_pie_menu_exec(bContext *C, wmOperator *op)
+{
+	char idname[BKE_ST_MAXNAME];
+	RNA_string_get(op->ptr, "name", idname);
+
+	uiPieMenuInvoke(C, idname, CTX_wm_window(C)->eventstate);
+
+	return OPERATOR_CANCELLED;
+}
+
+static void WM_OT_call_menu_pie(wmOperatorType *ot)
+{
+	ot->name = "Call Pie Menu";
+	ot->idname = "WM_OT_call_menu_pie";
+	ot->description = "Call (draw) a pre-defined pie menu";
+
+	ot->invoke = wm_call_pie_menu_invoke;
+	ot->exec = wm_call_pie_menu_exec;
+	ot->poll = WM_operator_winactive;
+
+	ot->flag = OPTYPE_INTERNAL;
+
+	RNA_def_string(ot->srna, "name", NULL, BKE_ST_MAXNAME, "Name", "Name of the pie menu");
+}
+
 /* ************ window / screen operator definitions ************** */
 
 /* this poll functions is needed in place of WM_operator_winactive
@@ -4427,6 +4462,7 @@ void wm_operatortype_init(void)
 	WM_operatortype_append(WM_OT_splash);
 	WM_operatortype_append(WM_OT_search_menu);
 	WM_operatortype_append(WM_OT_call_menu);
+	WM_operatortype_append(WM_OT_call_menu_pie);
 	WM_operatortype_append(WM_OT_radial_control);
 #if defined(WIN32)
 	WM_operatortype_append(WM_OT_console_toggle);

source/blender/windowmanager/wm_event_system.h

@@ -81,8 +81,9 @@ enum {
 
 /* handler flag */
 enum {
-	WM_HANDLER_BLOCKING    = 1,  /* after this handler all others are ignored */
-	WM_HANDLER_DO_FREE     = 2   /* handler tagged to be freed in wm_handlers_do() */
+	WM_HANDLER_BLOCKING             = (1 << 0),  /* after this handler all others are ignored */
+	WM_HANDLER_DO_FREE              = (1 << 1),  /* handler tagged to be freed in wm_handlers_do() */
+	WM_HANDLER_ACCEPT_DBL_CLICK     = (1 << 2),  /* handler accepts double key press events */
 };
 
 /* wm_event_system.c */

source/blenderplayer/bad_level_call_stubs/stubs.c

@@ -622,6 +622,13 @@ struct wmKeyMap *WM_modalkeymap_add(struct wmKeyConfig *keyconf, const char *idn
 struct uiPopupMenu *uiPupMenuBegin(struct bContext *C, const char *title, int icon) RET_NULL
 void uiPupMenuEnd(struct bContext *C, struct uiPopupMenu *head) RET_NONE
 struct uiLayout *uiPupMenuLayout(struct uiPopupMenu *head) RET_NULL
+struct uiLayout *uiPieMenuLayout(struct uiPieMenu *pie) RET_NULL
+void uiPieMenuInvoke(struct bContext *C, const char *idname, const struct wmEvent *event) RET_NONE
+struct uiPieMenu *uiPieMenuBegin(struct bContext *C, const char *title, int icon, const struct wmEvent *event) RET_NULL
+void uiPieMenuEnd(struct bContext *C, uiPieMenu *pie) RET_NONE
+struct uiLayout *uiLayoutRadial(struct uiLayout *layout) RET_NULL
+void uiPieOperatorEnumInvoke(struct bContext *C, const char *title, const char *opname,
+                             const char *propname, const struct wmEvent *event) RET_NONE
 
 /* RNA COLLADA dependency */
 int collada_export(struct Scene *sce,