cocoa: Another attempt at synthesized mouse/touch events.

src/video/cocoa/SDL_cocoamouse.m

@@ -375,6 +375,15 @@ Cocoa_HandleMouseEvent(_THIS, NSEvent *event)
         return;  /* can happen when returning from fullscreen Space on shutdown */
     }
 
+    SDL_MouseID mouseID = mouse ? mouse->mouseID : 0;
+    if ([event subtype] == NSEventSubtypeTouch) {  /* this is a synthetic from the OS */
+        if (mouse->touch_mouse_events) {
+            mouseID = SDL_TOUCH_MOUSEID;   /* Hint is set */
+        } else {
+            return;  /* no hint set, drop this one. */
+        }
+    }
+
     const SDL_bool seenWarp = driverdata->seenWarp;
     driverdata->seenWarp = NO;
 
@@ -408,13 +417,21 @@ Cocoa_HandleMouseEvent(_THIS, NSEvent *event)
         DLog("Motion was (%g, %g), offset to (%g, %g)", [event deltaX], [event deltaY], deltaX, deltaY);
     }
 
-    SDL_SendMouseMotion(mouse->focus, mouse->mouseID, 1, (int)deltaX, (int)deltaY);
+    SDL_SendMouseMotion(mouse->focus, mouseID, 1, (int)deltaX, (int)deltaY);
 }
 
 void
 Cocoa_HandleMouseWheel(SDL_Window *window, NSEvent *event)
 {
     SDL_Mouse *mouse = SDL_GetMouse();
+    SDL_MouseID mouseID = mouse ? mouse->mouseID : 0;
+    if ([event subtype] == NSEventSubtypeTouch) {  /* this is a synthetic from the OS */
+        if (mouse->touch_mouse_events) {
+            mouseID = SDL_TOUCH_MOUSEID;   /* Hint is set */
+        } else {
+            return;  /* no hint set, drop this one. */
+        }
+    }
 
     CGFloat x = -[event deltaX];
     CGFloat y = [event deltaY];
@@ -437,7 +454,7 @@ Cocoa_HandleMouseWheel(SDL_Window *window, NSEvent *event)
         y = SDL_floor(y);
     }
 
-    SDL_SendMouseWheel(window, mouse->mouseID, x, y, direction);
+    SDL_SendMouseWheel(window, mouseID, x, y, direction);
 }
 
 void

src/video/cocoa/SDL_cocoawindow.m

@@ -893,9 +893,19 @@ SetWindowStyle(SDL_Window * window, NSUInteger style)
 
 - (void)mouseDown:(NSEvent *)theEvent
 {
+    const SDL_Mouse *mouse = SDL_GetMouse();
+    SDL_MouseID mouseID = mouse ? mouse->mouseID : 0;
     int button;
     int clicks;
 
+    if ([theEvent subtype] == NSEventSubtypeTouch) {  /* this is a synthetic from the OS */
+        if (mouse->touch_mouse_events) {
+            mouseID = SDL_TOUCH_MOUSEID;   /* Hint is set */
+        } else {
+            return;  /* no hint set, drop this one. */
+        }
+    }
+
     /* Ignore events that aren't inside the client area (i.e. title bar.) */
     if ([theEvent window]) {
         NSRect windowRect = [[[theEvent window] contentView] frame];
@@ -933,8 +943,6 @@ SetWindowStyle(SDL_Window * window, NSUInteger style)
 
     clicks = (int) [theEvent clickCount];
 
-    const SDL_Mouse *mouse = SDL_GetMouse();
-    const SDL_MouseID mouseID = mouse ? mouse->mouseID : 0;
     SDL_SendMouseButtonClicks(_data->window, mouseID, SDL_PRESSED, button, clicks);
 }
 
@@ -950,9 +958,19 @@ SetWindowStyle(SDL_Window * window, NSUInteger style)
 
 - (void)mouseUp:(NSEvent *)theEvent
 {
+    const SDL_Mouse *mouse = SDL_GetMouse();
+    SDL_MouseID mouseID = mouse ? mouse->mouseID : 0;
     int button;
     int clicks;
 
+    if ([theEvent subtype] == NSEventSubtypeTouch) {  /* this is a synthetic from the OS */
+        if (mouse->touch_mouse_events) {
+            mouseID = SDL_TOUCH_MOUSEID;   /* Hint is set */
+        } else {
+            return;  /* no hint set, drop this one. */
+        }
+    }
+
     if ([self processHitTest:theEvent]) {
         SDL_SendWindowEvent(_data->window, SDL_WINDOWEVENT_HIT_TEST, 0, 0);
         return;  /* stopped dragging, drop event. */
@@ -980,8 +998,6 @@ SetWindowStyle(SDL_Window * window, NSUInteger style)
 
     clicks = (int) [theEvent clickCount];
 
-    const SDL_Mouse *mouse = SDL_GetMouse();
-    const SDL_MouseID mouseID = mouse ? mouse->mouseID : 0;
     SDL_SendMouseButtonClicks(_data->window, mouseID, SDL_RELEASED, button, clicks);
 }
 
@@ -998,10 +1014,19 @@ SetWindowStyle(SDL_Window * window, NSUInteger style)
 - (void)mouseMoved:(NSEvent *)theEvent
 {
     SDL_Mouse *mouse = SDL_GetMouse();
+    SDL_MouseID mouseID = mouse ? mouse->mouseID : 0;
     SDL_Window *window = _data->window;
     NSPoint point;
     int x, y;
 
+    if ([theEvent subtype] == NSEventSubtypeTouch) {  /* this is a synthetic from the OS */
+        if (mouse->touch_mouse_events) {
+            mouseID = SDL_TOUCH_MOUSEID;   /* Hint is set */
+        } else {
+            return;  /* no hint set, drop this one. */
+        }
+    }
+
     if ([self processHitTest:theEvent]) {
         SDL_SendWindowEvent(window, SDL_WINDOWEVENT_HIT_TEST, 0, 0);
         return;  /* dragging, drop event. */
@@ -1046,7 +1071,7 @@ SetWindowStyle(SDL_Window * window, NSUInteger style)
         }
     }
 
-    SDL_SendMouseMotion(window, mouse->mouseID, 0, x, y);
+    SDL_SendMouseMotion(window, mouseID, 0, x, y);
 }
 
 - (void)mouseDragged:(NSEvent *)theEvent