From d44b518c070b9b92f7aefca7e7a66c0b67366b62 Mon Sep 17 00:00:00 2001
From: Matthias Melcher <fltk@matthiasm.com>
Date: Wed, 1 Apr 2015 15:32:06 +0000
Subject: Added FL_ZOOM_GESTURE gesture for OS X.

Sadly, I have not commited any code in years, and despite the rumour that
I was hit by a train, or worse, move on to Qt, here I am, commmiting unwanted
code. Hopefully there are equivalents for this on other platforms?!


git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@10656 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
---
 src/Fl_cocoa.mm | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

(limited to 'src')

diff --git a/src/Fl_cocoa.mm b/src/Fl_cocoa.mm
index ecf46a66a..86477c1f4 100644
--- a/src/Fl_cocoa.mm
+++ b/src/Fl_cocoa.mm
@@ -951,6 +951,30 @@ static void cocoaMouseWheelHandler(NSEvent *theEvent)
   //  return noErr;
 }
 
+/*
+ * Cocoa Magnify Gesture Handler
+ */
+static void cocoaMagnifyHandler(NSEvent *theEvent)
+{
+  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 magnification]*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_ZOOM_GESTURE, window );
+  }
+  fl_unlock_function();
+}
+
 /*
  * Cocoa Mouse Button Handler
  */
@@ -2152,6 +2176,7 @@ static FLTextInputContext* fltextinputcontext_instance = nil;
 - (void)rightMouseDragged:(NSEvent *)theEvent;
 - (void)otherMouseDragged:(NSEvent *)theEvent;
 - (void)scrollWheel:(NSEvent *)theEvent;
+- (void)magnifyWithEvent:(NSEvent *)theEvent;
 - (void)keyDown:(NSEvent *)theEvent;
 - (void)keyUp:(NSEvent *)theEvent;
 - (void)flagsChanged:(NSEvent *)theEvent;
@@ -2276,6 +2301,9 @@ static FLTextInputContext* fltextinputcontext_instance = nil;
 - (void)scrollWheel:(NSEvent *)theEvent {
   cocoaMouseWheelHandler(theEvent);
 }
+- (void)magnifyWithEvent:(NSEvent *)theEvent {
+  cocoaMagnifyHandler(theEvent);
+}
 - (void)keyDown:(NSEvent *)theEvent {
   //NSLog(@"keyDown:%@",[theEvent characters]);
   fl_lock_function();
-- 
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