2.5

Sanitized the 'tweak' event.

Original idea was to have WM event system generating it 
automatically. However, I first tested it via a handler
and operator, to check what kind of configurations would
be useful. It appeared to not work nice, also because
that inserting a tweak operator in a keymap is confusing.

Now 'tweaks' are generated automatically, and can be
catched by keymaps as any event. The current definition
of tweak is:

- if Left/Middle/Rightmouse pressed
    if event wasn't handled by window queue (modal handlers)
       start checking mousepositions

- while mousepositions are checked
   - escape on any event other than mouse
   - on mouse events:
     - add tweak event if mousemove > 10 pixels
     - stop checking for tweak if mousebutton released

- Tweak events have a define indicating mousebutton used
  EVT_TWEAK_L, EVT_TWEAK_M, EVT_TWEAK_R  

- In keymap definitions you can use _S or _A to map to
  action or select mouse userdef.

- Event value in keymap should be KM_ANY for all tweaks,
  or use one of the eight directions:
  EVT_GESTURE_E, _SE, _S, _SW, _W, _NW, _N, _NE 

- And of course you can add modifier checks in keymaps for it.

- Because tweaks are a result of mouse events, the handlers get
  both to evaluate. That means that RMB-select + tweak will work
  correctly.
  In case you don't want both to be handled, for example the 
  CTRL+LMB 'extrude' and CTRL+LMB-tweak 'lasso select', you will
  need to set the first acting on a EVT_RELEASE, this event only
  gets passed on when tweak fails.

The current system allows all options, configurable, we had in 2.48,
and many more! A diagram of what's possible is on the todo. :)

Also in this commit: lasso select editmesh failed with 'zbuffer 
occluded select'. Also circle-select failed.

source/blender/blenloader/intern/readfile.c

@@ -3945,11 +3945,13 @@ static void direct_link_windowmanager(FileData *fd, wmWindowManager *wm)
 		win->ghostwin= NULL;
 		win->eventstate= NULL;
 		win->curswin= NULL;
-		
+		win->tweak= NULL;
+
 		win->timers.first= win->timers.last= NULL;
 		win->queue.first= win->queue.last= NULL;
 		win->handlers.first= win->handlers.last= NULL;
 		win->subwindows.first= win->subwindows.last= NULL;
+		win->gesture.first= win->gesture.last= NULL;
 
 		win->drawdata= NULL;
 		win->drawmethod= -1;

source/blender/editors/animation/anim_markers.c

@@ -889,7 +889,4 @@ void ED_marker_keymap(wmWindowManager *wm)
 	
 	WM_keymap_add_item(keymap, "MARKER_OT_move", GKEY, KM_PRESS, 0, 0);
 	
-	/* generates event, needs to be after select to work */
-	WM_keymap_tweak(keymap, SELECTMOUSE, KM_PRESS, 0, 0);
-	
 }

source/blender/editors/mesh/editmesh_mods.c

@@ -247,10 +247,9 @@ int EM_mask_init_backbuf_border(ViewContext *vc, short mcords[][2], short tot, s
 	}
 	else if(vc->v3d->drawtype<OB_SOLID || (vc->v3d->flag & V3D_ZBUF_SELECT)==0) return 0;
 
-	if(em_vertoffs==0) return 0;
-	
 	buf= view3d_read_backbuf(vc, xmin, ymin, xmax, ymax);
 	if(buf==NULL) return 0;
+	if(em_vertoffs==0) return 0;
 
 	dr = buf->rect;
 
@@ -260,6 +259,7 @@ int EM_mask_init_backbuf_border(ViewContext *vc, short mcords[][2], short tot, s
 	glColor3ub(0, 0, 0);
 	
 	/* yah, opengl doesn't do concave... tsk! */
+	ED_region_pixelspace(vc->ar);
  	draw_triangulated(mcords, tot);	
 	
 	glBegin(GL_LINE_LOOP);	/* for zero sized masks, lines */
@@ -301,11 +301,11 @@ int EM_init_backbuf_circle(ViewContext *vc, short xs, short ys, short rads)
 		else return 0;
 	}
 	else if(vc->v3d->drawtype<OB_SOLID || (vc->v3d->flag & V3D_ZBUF_SELECT)==0) return 0;
-	if(em_vertoffs==0) return 0;
 	
 	xmin= xs-rads; xmax= xs+rads;
 	ymin= ys-rads; ymax= ys+rads;
 	buf= view3d_read_backbuf(vc, xmin, ymin, xmax, ymax);
+	if(em_vertoffs==0) return 0;
 	if(buf==NULL) return 0;
 
 	dr = buf->rect;

source/blender/editors/mesh/mesh_ops.c

@@ -206,9 +206,6 @@ void ED_keymap_mesh(wmWindowManager *wm)
 	
 	WM_keymap_add_item(keymap, "MESH_OT_selection_type", TABKEY, KM_PRESS, KM_CTRL, 0);
 	
-	
-	/* transform keymap already defined, so no tweaks for select */
-	
 	/* hide */
 	WM_keymap_add_item(keymap, "MESH_OT_hide", HKEY, KM_PRESS, 0, 0);
 	RNA_boolean_set(WM_keymap_add_item(keymap, "MESH_OT_hide", HKEY, KM_PRESS, KM_SHIFT, 0)->ptr, "invert", 1);
@@ -236,7 +233,8 @@ void ED_keymap_mesh(wmWindowManager *wm)
 	WM_keymap_add_item(keymap, "MESH_OT_add_duplicate", DKEY, KM_PRESS, KM_SHIFT, 0);
 	WM_keymap_add_item(keymap, "OBJECT_OT_mesh_add", AKEY, KM_PRESS, KM_SHIFT, 0);
 	WM_keymap_add_item(keymap, "MESH_OT_separate", PKEY, KM_PRESS, KM_SHIFT, 0);
-	WM_keymap_add_item(keymap, "MESH_OT_dupli_extrude_cursor", LEFTMOUSE, KM_PRESS, KM_CTRL, 0);
+						/* use KM_RELEASE because same key is used for tweaks */
+	WM_keymap_add_item(keymap, "MESH_OT_dupli_extrude_cursor", LEFTMOUSE, KM_RELEASE, KM_CTRL, 0);
 	
 	WM_keymap_add_item(keymap, "MESH_OT_delete", XKEY, KM_PRESS, 0, 0);
 	

source/blender/editors/space_action/action_ops.c

@@ -139,9 +139,6 @@ static void action_keymap_keyframes (wmWindowManager *wm, ListBase *keymap)
 	WM_keymap_add_item(keymap, "ACT_OT_set_previewrange", PKEY, KM_PRESS, KM_CTRL|KM_ALT, 0);
 	WM_keymap_add_item(keymap, "ACT_OT_view_all", HOMEKEY, KM_PRESS, 0, 0);
 	
-	/* generates event, needs to be after select to work */
-	WM_keymap_tweak(keymap, SELECTMOUSE, KM_PRESS, 0, 0);
-		
 	/* transform system */
 	transform_keymap_for_space(wm, keymap, SPACE_ACTION);
 }

source/blender/editors/space_ipo/ipo_ops.c

@@ -186,9 +186,6 @@ static void graphedit_keymap_keyframes (wmWindowManager *wm, ListBase *keymap)
 	//WM_keymap_add_item(keymap, "GRAPHEDIT_OT_set_previewrange", PKEY, KM_PRESS, KM_CTRL|KM_ALT, 0);
 	//WM_keymap_add_item(keymap, "GRAPHEDIT_OT_view_all", HOMEKEY, KM_PRESS, 0, 0);
 	
-	/* generates event, needs to be after select to work */
-	WM_keymap_tweak(keymap, SELECTMOUSE, KM_PRESS, 0, 0);
-
 	/* transform system */
 	transform_keymap_for_space(wm, keymap, SPACE_IPO);
 }

source/blender/editors/space_node/node_ops.c

@@ -73,9 +73,5 @@ void node_keymap(struct wmWindowManager *wm)
 	WM_keymap_add_item(keymap, "NODE_OT_border_select", BKEY, KM_PRESS, 0, 0);
 	WM_keymap_add_item(keymap, "NODE_OT_delete_selection", XKEY, KM_PRESS, 0, 0);
 	
-	/* generates event, needs to be after select to work */
-	WM_keymap_tweak(keymap, ACTIONMOUSE, KM_PRESS, 0, 0);
-	WM_keymap_tweak(keymap, SELECTMOUSE, KM_PRESS, 0, 0);
-	
 	transform_keymap_for_space(wm, keymap, SPACE_NODE);
 }

source/blender/editors/space_sequencer/sequencer_ops.c

@@ -155,8 +155,6 @@ void sequencer_keymap(wmWindowManager *wm)
 	
 	WM_keymap_verify_item(keymap, "ANIM_OT_change_frame", LEFTMOUSE, KM_PRESS, 0, 0);
 
-	WM_keymap_tweak(keymap, SELECTMOUSE, KM_PRESS, 0, 0);
-
 	transform_keymap_for_space(wm, keymap, SPACE_SEQ);
 }
 

source/blender/editors/space_view3d/view3d_ops.c

@@ -183,10 +183,5 @@ void view3d_keymap(wmWindowManager *wm)
 
 	transform_keymap_for_space(wm, keymap, SPACE_VIEW3D);
 
-	/* generates event, in end to make select work */
-	WM_keymap_tweak(keymap, SELECTMOUSE, KM_PRESS, 0, 0);
-	/* tweak event for border, lasso, etc */
-	WM_keymap_tweak(keymap, ACTIONMOUSE, KM_PRESS, KM_CTRL, 0);
-
 }
 

source/blender/editors/space_view3d/view3d_select.c

@@ -703,6 +703,8 @@ static int view3d_lasso_select_exec(bContext *C, wmOperator *op)
 	RNA_END;
 	
 	if(i>1) {
+		view3d_operator_needs_opengl(C);
+		
 		/* setup view context for argument to callbacks */
 		view3d_set_viewcontext(C, &vc);
 		
@@ -1754,6 +1756,8 @@ static int view3d_circle_select_exec(bContext *C, wmOperator *op)
 		ViewContext vc;
 		short mval[2], selecting;
 		
+		view3d_operator_needs_opengl(C);
+		
 		view3d_set_viewcontext(C, &vc);
 		mval[0]= x;
 		mval[1]= y;

source/blender/editors/uvedit/uvedit_ops.c

@@ -2568,9 +2568,6 @@ void ED_keymap_uvedit(wmWindowManager *wm)
 	// XXX not working?
 	RNA_boolean_set(WM_keymap_add_item(keymap, "UV_OT_loop_select", SELECTMOUSE, KM_PRESS, KM_SHIFT, KM_ALT)->ptr, "extend", 1);
 
-	/* generates event, needs to be after select to work */
-	WM_keymap_tweak(keymap, SELECTMOUSE, KM_PRESS, 0, 0);
-
 	WM_keymap_add_item(keymap, "UV_OT_select_linked", LKEY, KM_PRESS, KM_CTRL, 0);
 	WM_keymap_add_item(keymap, "UV_OT_unlink_selection", LKEY, KM_PRESS, KM_ALT, 0);
 	WM_keymap_add_item(keymap, "UV_OT_de_select_all", AKEY, KM_PRESS, 0, 0);

source/blender/makesdna/DNA_windowmanager_types.h

@@ -38,6 +38,7 @@ struct wmWindowManager;
 struct wmWindow;
 
 struct wmEvent;
+struct wmGesture;
 struct wmOperatorType;
 struct wmOperator;
 
@@ -102,6 +103,8 @@ typedef struct wmWindow {
 	
 	struct wmSubWindow *curswin;	/* internal for wm_subwindow.c only */
 
+	struct wmGesture *tweak;	/* internal for wm_operators.c */
+	
 	int drawmethod, drawfail;	/* internal for wm_draw.c only */
 	void *drawdata;				/* internal for wm_draw.c only */
 	
@@ -168,7 +171,7 @@ typedef struct wmKeymapItem {
 	short shift, ctrl, alt, oskey;	/* oskey is apple or windowskey, value denotes order of pressed */
 	short keymodifier;				/* rawkey modifier */
 	
-	short is_tweak;					/* internal only, to handle tweak failure events properly */
+	short pad;
 } wmKeymapItem;
 
 #define KMAP_MAX_NAME	64

source/blender/windowmanager/WM_types.h

@@ -68,7 +68,7 @@ typedef struct wmEvent {
 	short prevx, prevy;	/* previous mouse pointer position */
 	short unicode;		/* future, ghost? */
 	char ascii;			/* from ghost */
-	char no_tweak;		/* set on tweak failure, to allow other events to try it */
+	char pad;
 	
 	/* modifier states */
 	short shift, ctrl, alt, oskey;	/* oskey is apple or windowskey, value denotes order of pressed */
@@ -224,6 +224,7 @@ typedef struct wmNotifier {
 #define WM_GESTURE_CIRCLE		5
 
 /* wmGesture is registered to window listbase, handled by operator callbacks */
+/* tweak gesture is builtin feature */
 typedef struct wmGesture {
 	struct wmGesture *next, *prev;
 	int event_type;	/* event->type */

source/blender/windowmanager/intern/wm_event_system.c

@@ -542,19 +542,6 @@ static int wm_eventmatch(wmEvent *winevent, wmKeymapItem *kmi)
 	if(kmi->keymodifier)
 		if(winevent->keymodifier!=kmi->keymodifier) return 0;
 	
-	/* happens on tweak failure */
-	/* weak code, testing only now! (ton) */
-	if(kmi->is_tweak) {
-		/* only after tweak keymap we allow the hack */
-		if(winevent->no_tweak) {
-			winevent->no_tweak= 2;
-			return 0;
-		}
-	}
-	
-	if(winevent->no_tweak==1)
-		return 0;
-	
 	return 1;
 }
 
@@ -850,15 +837,23 @@ void wm_event_do_handlers(bContext *C)
 				return;
 			}
 			
+			/* builtin tweak, if action is break it removes tweak */
+			if(!wm_event_always_pass(event))
+				wm_tweakevent_test(C, event, action);
+			
 			if(wm_event_always_pass(event) || action==WM_HANDLER_CONTINUE) {
 				ScrArea *sa;
 				ARegion *ar;
 				int doit= 0;
 				
 				/* XXX to solve, here screen handlers? */
-				if(event->type==MOUSEMOVE) {
-					ED_screen_set_subwinactive(win, event);	/* state variables in screen, cursors */
-					wm_paintcursor_test(C, event);
+				if(!wm_event_always_pass(event)) {
+					if(event->type==MOUSEMOVE) {
+						/* state variables in screen, cursors */
+						ED_screen_set_subwinactive(win, event);	
+						/* for regions having custom cursors */
+						wm_paintcursor_test(C, event);
+					}
 				}
 				
 				for(sa= win->screen->areabase.first; sa; sa= sa->next) {

source/blender/windowmanager/intern/wm_keymap.c

@@ -125,15 +125,6 @@ wmKeymapItem *WM_keymap_add_item(ListBase *lb, char *idname, short type, short v
 	return kmi;
 }
 
-/* enables tweak for mouse/modifier combo
-   on tweak fail, it passes on event with 'val=1', so other keymap items can test */
-void WM_keymap_tweak(ListBase *lb, short type, short val, int modifier, short keymodifier)
-{
-	wmKeymapItem *km= WM_keymap_add_item(lb, "WM_OT_tweak_gesture", type, val, modifier, keymodifier);
-	km->is_tweak= 1;
-}
-
-
 /* ****************** storage in WM ************ */
 
 /* name id's are for storing general or multiple keymaps, 

source/blender/windowmanager/intern/wm_operators.c

@@ -729,22 +729,10 @@ void WM_OT_circle_gesture(wmOperatorType *ot)
 
 /* **************** Tweak gesture *************** */
 
-static int tweak_gesture_invoke(bContext *C, wmOperator *op, wmEvent *event)
-{
-	op->customdata= WM_gesture_new(C, event, WM_GESTURE_TWEAK);
-	
-	/* add modal handler */
-	WM_event_add_modal_handler(C, &CTX_wm_window(C)->handlers, op);
-	
-	wm_gesture_tag_redraw(C);
-	
-	return OPERATOR_RUNNING_MODAL;
-}
-
-static int tweak_gesture_modal(bContext *C, wmOperator *op, wmEvent *event)
+static void tweak_gesture_modal(bContext *C, wmEvent *event)
 {
 	wmWindow *window= CTX_wm_window(C);
-	wmGesture *gesture= op->customdata;
+	wmGesture *gesture= window->tweak;
 	rcti *rect= gesture->customdata;
 	int sx, sy, val;
 	
@@ -758,7 +746,7 @@ static int tweak_gesture_modal(bContext *C, wmOperator *op, wmEvent *event)
 			
 			if((val= wm_gesture_evaluate(C, gesture))) {
 				wmEvent event;
-					
+
 				event= *(window->eventstate);
 				if(gesture->event_type==LEFTMOUSE)
 					event.type= EVT_TWEAK_L;
@@ -770,11 +758,9 @@ static int tweak_gesture_modal(bContext *C, wmOperator *op, wmEvent *event)
 				/* mouse coords! */
 				wm_event_add(window, &event);
 				
-				wm_gesture_end(C, op);
-				return OPERATOR_FINISHED;
+				WM_gesture_end(C, gesture);	/* frees gesture itself, and unregisters from window */
+				window->tweak= NULL;
 			}
-			else
-				wm_gesture_tag_redraw(C);
 			
 			break;
 			
@@ -782,29 +768,43 @@ static int tweak_gesture_modal(bContext *C, wmOperator *op, wmEvent *event)
 		case RIGHTMOUSE:
 		case MIDDLEMOUSE:
 			if(gesture->event_type==event->type) {
-				wm_gesture_end(C, op);
+				WM_gesture_end(C, gesture);
+				window->tweak= NULL;
 				
 				/* when tweak fails we should give the other keymap entries a chance
 				 * those then won't react to km_press, but km_release
 				 * it sets hidden event value where tweak maps fail on, to prevent loops */
-				event->val= 1;
-				event->no_tweak= 1;
-				return OPERATOR_FINISHED|OPERATOR_PASS_THROUGH;
+				//event->val= 1;
+				//event->no_tweak= 1;
 			}
 			break;
+		default:
+			WM_gesture_end(C, gesture);
+			window->tweak= NULL;
 	}
-	return OPERATOR_RUNNING_MODAL;
 }
 
-void WM_OT_tweak_gesture(wmOperatorType *ot)
+/* standard tweak, called after window handlers passed on event */
+void wm_tweakevent_test(bContext *C, wmEvent *event, int action)
 {
-	ot->name= "Tweak Gesture";
-	ot->idname= "WM_OT_tweak_gesture";
+	wmWindow *win= CTX_wm_window(C);
 	
-	ot->invoke= tweak_gesture_invoke;
-	ot->modal= tweak_gesture_modal;
-
-	ot->poll= WM_operator_winactive;
+	if(win->tweak==NULL) {
+		if(CTX_wm_region(C)) {
+			if(event->val) { // pressed
+				if( ELEM3(event->type, LEFTMOUSE, MIDDLEMOUSE, RIGHTMOUSE) )
+					win->tweak= WM_gesture_new(C, event, WM_GESTURE_TWEAK);
+			}
+		}
+	}
+	else {
+		if(action==WM_HANDLER_BREAK) {
+			WM_gesture_end(C, win->tweak);
+			win->tweak= NULL;
+		}
+		else
+			tweak_gesture_modal(C, event);
+	}
 }
 
 /* *********************** lasso gesture ****************** */
@@ -1171,7 +1171,6 @@ void wm_operatortype_init(void)
 	WM_operatortype_append(WM_OT_save_homefile);
 	WM_operatortype_append(WM_OT_window_fullscreen_toggle);
 	WM_operatortype_append(WM_OT_exit_blender);
-	WM_operatortype_append(WM_OT_tweak_gesture);
 	WM_operatortype_append(WM_OT_open_recentfile);
 	WM_operatortype_append(WM_OT_open_mainfile);
 	WM_operatortype_append(WM_OT_jobs_timer);

source/blender/windowmanager/wm.h

@@ -55,6 +55,8 @@ void wm_operatortype_free(void);
 void wm_operatortype_init(void);
 void wm_window_keymap(wmWindowManager *wm);
 
+void wm_tweakevent_test(bContext *C, wmEvent *event, int action);
+
 /* wm_gesture.c */
 #define WM_LASSO_MAX_POINTS		1024
 void wm_gesture_draw(struct wmWindow *win);