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1 // Copyright 2015 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef UI_VIEWS_COCOA_COCOA_NON_CLIENT_DRAG_H_ | |
6 #define UI_VIEWS_COCOA_COCOA_NON_CLIENT_DRAG_H_ | |
7 | |
8 #include "base/macros.h" | |
9 #import "ui/views/cocoa/native_widget_mac_nswindow.h" | |
10 #include "ui/views/views_export.h" | |
11 | |
12 @interface NativeWidgetMacNSWindow (CocoaNonClientDrag) | |
tapted
2015/05/20 07:18:17
I don't think this is needed (see later comments)
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13 // Called when the application receives a mouse-down, but before the event | |
14 // is processed by NSWindows. Returns NO if the event should be processed as-is, | |
15 // or YES if the event should be reposted to handle window dragging. Events are | |
16 // reposted at the CGSessionEventTap level because window dragging happens there | |
17 // before the application receives the event. | |
18 - (BOOL)willReceiveLeftMouseDown:(NSPoint)locationInWindow; | |
19 @end | |
20 | |
21 namespace views { | |
22 | |
23 // Support window caption/draggable regions. | |
24 // In AppKit, non-client regions are set by overriding | |
25 // -[NSView mouseDownCanMoveWindow]. NSApplication caches this area as views are | |
26 // installed and performs window moving when mouse-downs land in the area. | |
27 // In Views, non-client regions are determined via hit-tests when the event | |
28 // occurs. | |
29 // To bridge the two models, we monitor mouse-downs with | |
30 // +[NSEvent addLocalMonitorForEventsMatchingMask:handler:]. This receives | |
31 // events after window dragging is handled, so for mouse-downs that land on a | |
32 // draggable point, we cancel the event and repost it at the CGSessionEventTap | |
33 // level so that window dragging will be handled again. | |
34 class VIEWS_EXPORT CocoaNonClientDrag { | |
jackhou1
2015/05/20 05:50:37
It feels kind of roundabout that a class instantia
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35 public: | |
36 CocoaNonClientDrag(); | |
37 ~CocoaNonClientDrag(); | |
38 | |
39 private: | |
40 DISALLOW_COPY_AND_ASSIGN(CocoaNonClientDrag); | |
41 }; | |
42 | |
43 } // namespace views | |
44 | |
45 #endif // UI_VIEWS_COCOA_COCOA_NON_CLIENT_DRAG_H_ | |
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