macOS: add trackpad smart zoom event support

This is done with two-finger double tap on trackpads, and is usually used to
zoom into an element under the cursor.

It can now be used for toggling local view in the 3D viewport.

Differential Revision: https://developer.blender.org/D6588

intern/ghost/GHOST_Types.h

@@ -436,7 +436,8 @@ typedef enum {
   GHOST_kTrackpadEventScroll,
   GHOST_kTrackpadEventRotate,
   GHOST_kTrackpadEventSwipe, /* Reserved, not used for now */
-  GHOST_kTrackpadEventMagnify
+  GHOST_kTrackpadEventMagnify,
+  GHOST_kTrackpadEventSmartMagnify
 } GHOST_TTrackpadEventSubTypes;
 
 typedef struct {

intern/ghost/intern/GHOST_SystemCocoa.mm

@@ -1726,6 +1726,19 @@ GHOST_TSuccess GHOST_SystemCocoa::handleMouseEvent(void *eventPtr)
                                         0));
     } break;
 
+    case NSEventTypeSmartMagnify: {
+      NSPoint mousePos = [cocoawindow mouseLocationOutsideOfEventStream];
+      GHOST_TInt32 x, y;
+      window->clientToScreenIntern(mousePos.x, mousePos.y, x, y);
+      pushEvent(new GHOST_EventTrackpad([event timestamp] * 1000,
+                                        window,
+                                        GHOST_kTrackpadEventSmartMagnify,
+                                        x,
+                                        y,
+                                        0,
+                                        0));
+    } break;
+
     case NSEventTypeRotate: {
       NSPoint mousePos = [cocoawindow mouseLocationOutsideOfEventStream];
       GHOST_TInt32 x, y;

intern/ghost/intern/GHOST_WindowViewCocoa.h

@@ -154,6 +154,11 @@
   systemCocoa->handleMouseEvent(event);
 }
 
+- (void)smartMagnifyWithEvent:(NSEvent *)event
+{
+  systemCocoa->handleMouseEvent(event);
+}
+
 - (void)rotateWithEvent:(NSEvent *)event
 {
   systemCocoa->handleMouseEvent(event);

release/scripts/presets/keyconfig/keymap_data/blender_default.py

@@ -942,6 +942,7 @@ def km_view3d(params):
         # Visibility.
         ("view3d.localview", {"type": 'NUMPAD_SLASH', "value": 'PRESS'}, None),
         ("view3d.localview", {"type": 'SLASH', "value": 'PRESS'}, None),
+        ("view3d.localview", {"type": 'MOUSESMARTZOOM', "value": 'ANY'}, None),
         ("view3d.localview_remove_from", {"type": 'M', "value": 'PRESS'}, None),
         # Navigation.
         ("view3d.rotate", {"type": 'MIDDLEMOUSE', "value": 'PRESS'}, None),

release/scripts/presets/keyconfig/keymap_data/industry_compatible_data.py

@@ -630,6 +630,7 @@ def km_view3d(params):
         ("wm.search_menu", {"type": 'TAB', "value": 'PRESS'}, None),
         # Visibility.
         ("view3d.localview", {"type": 'I', "value": 'PRESS', "shift": True}, None),
+        ("view3d.localview", {"type": 'MOUSESMARTZOOM', "value": 'ANY'}, None),
         op_menu_pie("VIEW3D_MT_view_pie", {"type": 'V', "value": 'PRESS'}),
         # Navigation.
         ("view3d.rotate", {"type": 'LEFTMOUSE', "value": 'PRESS', "alt": True}, None),

source/blender/makesrna/intern/rna_wm.c

@@ -90,6 +90,7 @@ static const EnumPropertyItem event_mouse_type_items[] = {
     {MOUSEPAN, "TRACKPADPAN", 0, "Mouse/Trackpad Pan", ""},
     {MOUSEZOOM, "TRACKPADZOOM", 0, "Mouse/Trackpad Zoom", ""},
     {MOUSEROTATE, "MOUSEROTATE", 0, "Mouse/Trackpad Rotate", ""},
+    {MOUSESMARTZOOM, "MOUSESMARTZOOM", 0, "Mouse/Trackpad Smart Zoom", ""},
     {0, "", 0, NULL, NULL},
     {WHEELUPMOUSE, "WHEELUPMOUSE", 0, "Wheel Up", ""},
     {WHEELDOWNMOUSE, "WHEELDOWNMOUSE", 0, "Wheel Down", ""},
@@ -186,6 +187,7 @@ const EnumPropertyItem rna_enum_event_type_items[] = {
     {MOUSEPAN, "TRACKPADPAN", 0, "Mouse/Trackpad Pan", "MsPan"},
     {MOUSEZOOM, "TRACKPADZOOM", 0, "Mouse/Trackpad Zoom", "MsZoom"},
     {MOUSEROTATE, "MOUSEROTATE", 0, "Mouse/Trackpad Rotate", "MsRot"},
+    {MOUSESMARTZOOM, "MOUSESMARTZOOM", 0, "Mouse/Trackpad Smart Zoom", "MsSmartZoom"},
     {0, "", 0, NULL, NULL},
     {WHEELUPMOUSE, "WHEELUPMOUSE", 0, "Wheel Up", "WhUp"},
     {WHEELDOWNMOUSE, "WHEELDOWNMOUSE", 0, "Wheel Down", "WhDown"},

source/blender/windowmanager/intern/wm_event_system.c

@@ -4292,6 +4292,9 @@ void wm_event_add_ghostevent(wmWindowManager *wm, wmWindow *win, int type, void
           pd->deltaX = -pd->deltaX;
           pd->deltaY = -pd->deltaY;
           break;
+        case GHOST_kTrackpadEventSmartMagnify:
+          event.type = MOUSESMARTZOOM;
+          break;
         case GHOST_kTrackpadEventRotate:
           event.type = MOUSEROTATE;
           break;

source/blender/windowmanager/wm_event_types.h

@@ -63,6 +63,8 @@ enum {
   MOUSEPAN = 0x000e,
   MOUSEZOOM = 0x000f,
   MOUSEROTATE = 0x0010,
+  MOUSESMARTZOOM = 0x0017,
+
   /* defaults from ghost */
   WHEELUPMOUSE = 0x000a,
   WHEELDOWNMOUSE = 0x000b,
@@ -359,7 +361,8 @@ enum {
   (((event_type) >= LEFTCTRLKEY && (event_type) <= LEFTSHIFTKEY) || (event_type) == OSKEY)
 
 /* test whether the event is a mouse button */
-#define ISMOUSE(event_type) ((event_type) >= LEFTMOUSE && (event_type) <= BUTTON7MOUSE)
+#define ISMOUSE(event_type) \
+  (((event_type) >= LEFTMOUSE && (event_type) <= BUTTON7MOUSE) || (event_type) == MOUSESMARTZOOM)
 
 #define ISMOUSE_WHEEL(event_type) ((event_type) >= WHEELUPMOUSE && (event_type) <= WHEELOUTMOUSE)
 #define ISMOUSE_GESTURE(event_type) ((event_type) >= MOUSEPAN && (event_type) <= MOUSEROTATE)