2.5: File browse button in ui layouts now works, e.g. for render

output path or fluidsim path.

source/blender/editors/include/UI_interface.h

@@ -142,6 +142,7 @@ typedef struct uiLayout uiLayout;
 #define UI_BUT_ANIMATED_KEY	(1<<21)
 #define UI_BUT_DRIVEN		(1<<22)
 #define UI_BUT_INACTIVE		(1<<23)
+#define UI_BUT_LAST_ACTIVE	(1<<24)
 
 #define UI_PANEL_WIDTH			340
 #define UI_COMPACT_PANEL_WIDTH	160
@@ -674,9 +675,9 @@ void uiItemMenuF(uiLayout *layout, char *name, int icon, uiMenuCreateFunc func);
 void uiItemMenuEnumO(uiLayout *layout, char *name, int icon, char *opname, char *propname);
 void uiItemMenuEnumR(uiLayout *layout, char *name, int icon, struct PointerRNA *ptr, char *propname);
 
-/* Animation */
-
+/* Helpers for Operators */
 void uiAnimContextProperty(const struct bContext *C, struct PointerRNA *ptr, struct PropertyRNA **prop, int *index);
+void uiFileBrowseContextProperty(const struct bContext *C, struct PointerRNA *ptr, struct PropertyRNA **prop);
 
 /* Styled text draw */
 void uiStyleFontSet(struct uiFontStyle *fs);

source/blender/editors/interface/interface_anim.c

@@ -165,6 +165,10 @@ void uiAnimContextProperty(const bContext *C, struct PointerRNA *ptr, struct Pro
 	uiBlock *block;
 	uiBut *but;
 
+	memset(ptr, 0, sizeof(*ptr));
+	*prop= NULL;
+	*index= 0;
+
 	if(ar) {
 		for(block=ar->uiblocks.first; block; block=block->next) {
 			for(but=block->buttons.first; but; but= but->next) {

source/blender/editors/interface/interface_handlers.c

@@ -3687,6 +3687,7 @@ static void button_activate_init(bContext *C, ARegion *ar, uiBut *but, uiButtonA
 static void button_activate_exit(bContext *C, uiHandleButtonData *data, uiBut *but, int mousemove)
 {
 	uiBlock *block= but->block;
+	uiBut *bt;
 
 	/* ensure we are in the exit state */
 	if(data->state != BUTTON_STATE_EXIT)
@@ -3712,7 +3713,14 @@ static void button_activate_exit(bContext *C, uiHandleButtonData *data, uiBut *b
 	if(!data->cancel)
 		ui_apply_autokey_undo(C, but);
 
-	/* disable tooltips until mousemove */
+	/* disable tooltips until mousemove + last active flag */
+	for(block=data->region->uiblocks.first; block; block=block->next) {
+		for(bt=block->buttons.first; bt; bt=bt->next)
+			bt->flag &= ~UI_BUT_LAST_ACTIVE;
+
+		block->tooltipdisabled= 1;
+	}
+
 	ui_blocks_set_tooltips(data->region, 0);
 
 	/* clean up */
@@ -3728,6 +3736,7 @@ static void button_activate_exit(bContext *C, uiHandleButtonData *data, uiBut *b
 	MEM_freeN(but->active);
 	but->active= NULL;
 	but->flag &= ~(UI_ACTIVE|UI_SELECT);
+	but->flag |= UI_BUT_LAST_ACTIVE;
 	ui_check_but(but);
 
 	/* adds empty mousemove in queue for re-init handler, in case mouse is

source/blender/editors/interface/interface_layout.c

@@ -486,7 +486,9 @@ static uiBut *ui_item_with_label(uiLayout *layout, uiBlock *block, char *name, i
 	if(subtype == PROP_FILEPATH || subtype == PROP_DIRPATH) {
 		uiBlockSetCurLayout(block, uiLayoutRow(sub, 1));
 		uiDefAutoButR(block, ptr, prop, index, "", icon, x, y, w-UI_UNIT_X, h);
-		but= uiDefIconBut(block, BUT, 0, ICON_FILESEL, x, y, UI_UNIT_X, h, NULL, 0.0f, 0.0f, 0.0f, 0.0f, "DUMMY file select button"); /* XXX */
+
+		/* BUTTONS_OT_file_browse calls uiFileBrowseContextProperty */
+		but= uiDefIconButO(block, BUT, "BUTTONS_OT_file_browse", WM_OP_INVOKE_DEFAULT, ICON_FILESEL, x, y, UI_UNIT_X, h, "Browse for file or directory.");
 	}
 	else
 		but= uiDefAutoButR(block, ptr, prop, index, "", icon, x, y, w, h);
@@ -495,6 +497,34 @@ static uiBut *ui_item_with_label(uiLayout *layout, uiBlock *block, char *name, i
 	return but;
 }
 
+void uiFileBrowseContextProperty(const bContext *C, PointerRNA *ptr, PropertyRNA **prop)
+{
+	ARegion *ar= CTX_wm_region(C);
+	uiBlock *block;
+	uiBut *but, *prevbut;
+
+	memset(ptr, 0, sizeof(*ptr));
+	*prop= NULL;
+
+	if(!ar)
+		return;
+
+	for(block=ar->uiblocks.first; block; block=block->next) {
+		for(but=block->buttons.first; but; but= but->next) {
+			prevbut= but->prev;
+
+			/* find the button before the active one */
+			if((but->flag & UI_BUT_LAST_ACTIVE) && prevbut && prevbut->rnapoin.id.data) {
+				if(RNA_property_type(prevbut->rnaprop) == PROP_STRING) {
+					*ptr= prevbut->rnapoin;
+					*prop= prevbut->rnaprop;
+					return;
+				}
+			}
+		}
+	}
+}
+
 /********************* Button Items *************************/
 
 /* disabled item */

source/blender/editors/space_buttons/buttons_intern.h

@@ -89,6 +89,7 @@ void PARTICLE_OT_target_move_down(struct wmOperatorType *ot);
 void SCENE_OT_render_layer_add(struct wmOperatorType *ot);
 void SCENE_OT_render_layer_remove(struct wmOperatorType *ot);
 
+void BUTTONS_OT_file_browse(struct wmOperatorType *ot);
 void BUTTONS_OT_toolbox(struct wmOperatorType *ot);
 
 #endif /* ED_BUTTONS_INTERN_H */

source/blender/editors/space_buttons/buttons_ops.c

@@ -72,6 +72,7 @@
 #include "RNA_define.h"
 
 #include "UI_interface.h"
+#include "UI_resources.h"
 
 #include "buttons_intern.h"	// own include
 
@@ -935,3 +936,73 @@ void BUTTONS_OT_toolbox(wmOperatorType *ot)
 	ot->invoke= toolbox_invoke;
 }
 
+/********************** filebrowse operator *********************/
+
+typedef struct FileBrowseOp {
+	PointerRNA ptr;
+	PropertyRNA *prop;
+} FileBrowseOp;
+
+static int file_browse_exec(bContext *C, wmOperator *op)
+{
+	FileBrowseOp *fbo= op->customdata;
+	char *str;
+	
+	str= RNA_string_get_alloc(op->ptr, "filename", 0, 0);
+	RNA_property_string_set(&fbo->ptr, fbo->prop, str);
+	RNA_property_update(C, &fbo->ptr, fbo->prop);
+	MEM_freeN(str);
+
+	MEM_freeN(op->customdata);
+	return OPERATOR_FINISHED;
+}
+
+static int file_browse_cancel(bContext *C, wmOperator *op)
+{
+	MEM_freeN(op->customdata);
+	op->customdata= NULL;
+
+	return OPERATOR_CANCELLED;
+}
+
+static int file_browse_invoke(bContext *C, wmOperator *op, wmEvent *event)
+{
+	PointerRNA ptr;
+	PropertyRNA *prop;
+	FileBrowseOp *fbo;
+	char *str;
+
+	uiFileBrowseContextProperty(C, &ptr, &prop);
+
+	if(!prop)
+		return OPERATOR_CANCELLED;
+	
+	fbo= MEM_callocN(sizeof(FileBrowseOp), "FileBrowseOp");
+	fbo->ptr= ptr;
+	fbo->prop= prop;
+	op->customdata= fbo;
+
+	str= RNA_property_string_get_alloc(&ptr, prop, 0, 0);
+	RNA_string_set(op->ptr, "filename", str);
+	MEM_freeN(str);
+
+	WM_event_add_fileselect(C, op); 
+	
+	return OPERATOR_RUNNING_MODAL;
+}
+
+void BUTTONS_OT_file_browse(wmOperatorType *ot)
+{
+	/* identifiers */
+	ot->name= "File Browse";
+	ot->idname= "BUTTONS_OT_file_browse";
+	
+	/* api callbacks */
+	ot->invoke= file_browse_invoke;
+	ot->exec= file_browse_exec;
+	ot->cancel= file_browse_cancel;
+
+	/* properties */
+	WM_operator_properties_filesel(ot, 0);
+}
+

source/blender/editors/space_buttons/space_buttons.c

@@ -209,6 +209,7 @@ void buttons_operatortypes(void)
 	WM_operatortype_append(SCENE_OT_render_layer_remove);
 
 	WM_operatortype_append(BUTTONS_OT_toolbox);
+	WM_operatortype_append(BUTTONS_OT_file_browse);
 }
 
 void buttons_keymap(struct wmWindowManager *wm)