2.5 / Drag & Drop

Commit of basic architecture. Sorry, nothing fun to play with yet.
Added two events: MOUSEDRAG and MOUSEDROP. MOUSEDRAG is sent when left-mouse clicking and then moving the cursor and every time the cursor is moved until the user releases the mouse button, thus generating a MOUSEDROP.
Also added two dummy drag operators in view3d and outliner (place holders for now).

Brecht and Ton: feel free to check/edit especially the event system code. I'm not sure that's the right way to do it. Also, I'm getting some mem leaks which I suspect are caused by my code.

6 files changed, 113 insertions, 0 deletions

diff --git a/source/blender/editors/space_outliner/outliner.c b/source/blender/editors/space_outliner/outliner.c
index 6ac094b3ad3..0df0cb46473 100644
--- a/source/blender/editors/space_outliner/outliner.c
+++ b/source/blender/editors/space_outliner/outliner.c
@@ -3452,6 +3452,57 @@ void OUTLINER_OT_data_operation(wmOperatorType *ot)
 }
 
 
+/* ****** Drag & Drop ****** */
+
+static int outliner_drag_invoke(bContext *C, wmOperator *op, wmEvent *event)
+{
+	wmWindow *win= CTX_wm_window(C);
+	Object *ob= CTX_data_active_object(C);
+	PointerRNA ptr;
+
+	RNA_pointer_create(NULL, &RNA_Object, ob, &ptr);
+
+	return OPERATOR_RUNNING_MODAL;
+}
+
+static int outliner_drag_modal(bContext *C, wmOperator *op, wmEvent *event)
+{
+	switch(event->type) {
+		case MOUSEDRAG:
+
+			break;
+		case MOUSEDROP:
+			return OPERATOR_FINISHED;
+		case ESCKEY:
+			return OPERATOR_CANCELLED;
+	}
+
+	return OPERATOR_RUNNING_MODAL;
+}
+
+static int outliner_drag_exec(bContext *C, wmOperator *op)
+{
+	return OPERATOR_FINISHED;
+}
+
+void OUTLINER_OT_drag(wmOperatorType *ot)
+{
+	/* identifiers */
+	ot->name= "Drag";
+	ot->idname= "OUTLINER_OT_drag";
+
+	/* api callbacks */
+	ot->invoke= outliner_drag_invoke;
+	ot->modal= outliner_drag_modal;
+	ot->exec= outliner_drag_exec;
+
+	ot->poll= ED_operator_outliner_active;
+
+	/* flags */
+	/* ot->flag= OPTYPE_UNDO; */
+}
+
+
 /* ******************** */
 
 
diff --git a/source/blender/editors/space_outliner/outliner_intern.h b/source/blender/editors/space_outliner/outliner_intern.h
index fc305361fe1..d5986f3ebbd 100644
--- a/source/blender/editors/space_outliner/outliner_intern.h
+++ b/source/blender/editors/space_outliner/outliner_intern.h
@@ -127,6 +127,8 @@ void OUTLINER_OT_group_operation(struct wmOperatorType *ot);
 void OUTLINER_OT_id_operation(struct wmOperatorType *ot);
 void OUTLINER_OT_data_operation(struct wmOperatorType *ot);
 
+void OUTLINER_OT_drag(struct wmOperatorType *ot);
+
 void OUTLINER_OT_show_one_level(struct wmOperatorType *ot);
 void OUTLINER_OT_show_active(struct wmOperatorType *ot);
 void OUTLINER_OT_show_hierarchy(struct wmOperatorType *ot);
diff --git a/source/blender/editors/space_outliner/outliner_ops.c b/source/blender/editors/space_outliner/outliner_ops.c
index 2e11eb379b4..417851982a3 100644
--- a/source/blender/editors/space_outliner/outliner_ops.c
+++ b/source/blender/editors/space_outliner/outliner_ops.c
@@ -56,6 +56,8 @@ void outliner_operatortypes(void)
 	WM_operatortype_append(OUTLINER_OT_id_operation);
 	WM_operatortype_append(OUTLINER_OT_data_operation);
 
+	WM_operatortype_append(OUTLINER_OT_drag);
+
 	WM_operatortype_append(OUTLINER_OT_show_one_level);
 	WM_operatortype_append(OUTLINER_OT_show_active);
 	WM_operatortype_append(OUTLINER_OT_show_hierarchy);
@@ -87,6 +89,9 @@ void outliner_keymap(wmWindowManager *wm)
 	WM_keymap_add_item(keymap, "OUTLINER_OT_item_rename", LEFTMOUSE, KM_PRESS, KM_CTRL, 0);
 	WM_keymap_add_item(keymap, "OUTLINER_OT_operation", RIGHTMOUSE, KM_PRESS, 0, 0);
 
+	/* drag & drop */
+	WM_keymap_add_item(keymap, "OUTLINER_OT_drag", MOUSEDRAG, KM_ANY, 0, 0);
+
 	WM_keymap_add_item(keymap, "OUTLINER_OT_show_hierarchy", HOMEKEY, KM_PRESS, 0, 0);
 	
 	WM_keymap_add_item(keymap, "OUTLINER_OT_show_active", PERIODKEY, KM_PRESS, 0, 0);
diff --git a/source/blender/editors/space_view3d/view3d_intern.h b/source/blender/editors/space_view3d/view3d_intern.h
index 3e9382509f4..382ba68e95f 100644
--- a/source/blender/editors/space_view3d/view3d_intern.h
+++ b/source/blender/editors/space_view3d/view3d_intern.h
@@ -115,6 +115,7 @@ void VIEW3D_OT_select_extend(struct wmOperatorType *ot);
 void VIEW3D_OT_select_circle(struct wmOperatorType *ot);
 void VIEW3D_OT_select_border(struct wmOperatorType *ot);
 void VIEW3D_OT_select_lasso(struct wmOperatorType *ot);
+void VIEW3D_OT_drag(struct wmOperatorType *ot);
 
 /* view3d_view.c */
 void VIEW3D_OT_smoothview(struct wmOperatorType *ot);
diff --git a/source/blender/editors/space_view3d/view3d_ops.c b/source/blender/editors/space_view3d/view3d_ops.c
index 112847272e5..69b297b2e03 100644
--- a/source/blender/editors/space_view3d/view3d_ops.c
+++ b/source/blender/editors/space_view3d/view3d_ops.c
@@ -73,6 +73,7 @@ void view3d_operatortypes(void)
 	WM_operatortype_append(VIEW3D_OT_view_center);
 	WM_operatortype_append(VIEW3D_OT_select);
 	WM_operatortype_append(VIEW3D_OT_select_border);
+	WM_operatortype_append(VIEW3D_OT_drag);
 	WM_operatortype_append(VIEW3D_OT_clip_border);
 	WM_operatortype_append(VIEW3D_OT_select_circle);
 	WM_operatortype_append(VIEW3D_OT_smoothview);
@@ -216,6 +217,9 @@ void view3d_keymap(wmWindowManager *wm)
 	WM_keymap_add_item(keymap, "VIEW3D_OT_camera_to_view", PAD0, KM_PRESS, KM_ALT|KM_CTRL, 0);
 	
 	WM_keymap_add_item(keymap, "VIEW3D_OT_snap_menu", SKEY, KM_PRESS, KM_SHIFT, 0);
+
+	/* drag & drop */
+	WM_keymap_add_item(keymap, "VIEW3D_OT_drag", MOUSEDRAG, KM_ANY, 0, 0);
 	
 	/* radial control */
 	RNA_enum_set(WM_keymap_add_item(keymap, "SCULPT_OT_radial_control", FKEY, KM_PRESS, 0, 0)->ptr, "mode", WM_RADIALCONTROL_SIZE);
diff --git a/source/blender/editors/space_view3d/view3d_select.c b/source/blender/editors/space_view3d/view3d_select.c
index 2537982210a..8182069c142 100644
--- a/source/blender/editors/space_view3d/view3d_select.c
+++ b/source/blender/editors/space_view3d/view3d_select.c
@@ -1598,6 +1598,56 @@ void VIEW3D_OT_select(wmOperatorType *ot)
 }
 
 
+/* ****** Drag & Drop ****** */
+
+static int view3d_drag_invoke(bContext *C, wmOperator *op, wmEvent *event)
+{
+	wmWindow *win= CTX_wm_window(C);
+	Object *ob= CTX_data_active_object(C);
+	PointerRNA ptr;
+
+	RNA_pointer_create(NULL, &RNA_Object, ob, &ptr);
+
+	return OPERATOR_RUNNING_MODAL;
+}
+
+static int view3d_drag_modal(bContext *C, wmOperator *op, wmEvent *event)
+{
+	switch(event->type) {
+		case MOUSEDRAG:
+
+			break;
+		case MOUSEDROP:
+			return OPERATOR_FINISHED;
+		case ESCKEY:
+			return OPERATOR_CANCELLED;
+	}
+
+	return OPERATOR_RUNNING_MODAL;
+}
+
+static int view3d_drag_exec(bContext *C, wmOperator *op)
+{
+	return OPERATOR_FINISHED;
+}
+
+void VIEW3D_OT_drag(wmOperatorType *ot)
+{
+	/* identifiers */
+	ot->name= "Drag";
+	ot->idname= "VIEW3D_OT_drag";
+	
+	/* api callbacks */
+	ot->invoke= view3d_drag_invoke;
+	ot->modal= view3d_drag_modal;
+	ot->exec= view3d_drag_exec;
+	ot->poll= ED_operator_view3d_active;
+	
+	/* flags */
+	/* ot->flag= OPTYPE_UNDO; */
+}
+
+
 /* -------------------- circle select --------------------------------------------- */
 
 static void mesh_circle_doSelectVert(void *userData, EditVert *eve, int x, int y, int index)