From 3049e6394a3376f7fff1c8cde19fd7bb1a9252ec Mon Sep 17 00:00:00 2001
From: Matthias Melcher <github@matthiasm.com>
Date: Sat, 5 Aug 2023 12:19:35 +0200
Subject: #733 partial: Adds rotation gesture event on MacOS

---
 src/Fl_cocoa.mm | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

(limited to 'src')

diff --git a/src/Fl_cocoa.mm b/src/Fl_cocoa.mm
index 8aef33780..f461505ee 100644
--- a/src/Fl_cocoa.mm
+++ b/src/Fl_cocoa.mm
@@ -965,6 +965,32 @@ static void cocoaMagnifyHandler(NSEvent *theEvent)
 #endif
 }
 
+/*
+ * Cocoa Rotate Gesture Handler
+ */
+static void cocoaRotateHandler(NSEvent *theEvent)
+{
+#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_6
+  fl_lock_function();
+  Fl_Window *window = (Fl_Window*)[(FLWindow*)[theEvent window] getFl_Window];
+  if ( !window->shown() ) {
+    fl_unlock_function();
+    return;
+  }
+  Fl::first_window(window);
+  Fl::e_dy = [theEvent rotation]*1000;
+  if ( Fl::e_dy) {
+    NSPoint pos = [theEvent locationInWindow];
+    pos.y = window->h() - pos.y;
+    NSUInteger mods = [theEvent modifierFlags];
+    mods_to_e_state( mods );
+    update_e_xy_and_e_xy_root([theEvent window]);
+    Fl::handle( FL_ROTATE_GESTURE, window );
+  }
+  fl_unlock_function();
+#endif
+}
+
 /*
  * Cocoa Mouse Button Handler
  */
@@ -2439,6 +2465,9 @@ static FLTextInputContext* fltextinputcontext_instance = nil;
 - (void)magnifyWithEvent:(NSEvent *)theEvent {
   cocoaMagnifyHandler(theEvent);
 }
+- (void)rotateWithEvent:(NSEvent *)theEvent {
+  cocoaRotateHandler(theEvent);
+}
 - (void)keyDown:(NSEvent *)theEvent {
   //NSLog(@"keyDown:%@",[theEvent characters]);
   fl_lock_function();
-- 
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