OLD | NEW |
| (Empty) |
1 // Copyright (c) 2012 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 BASE_MESSAGE_LOOP_MESSAGE_PUMP_GTK_H_ | |
6 #define BASE_MESSAGE_LOOP_MESSAGE_PUMP_GTK_H_ | |
7 | |
8 #include "base/message_loop/message_pump_glib.h" | |
9 | |
10 typedef union _GdkEvent GdkEvent; | |
11 typedef struct _XDisplay Display; | |
12 | |
13 namespace base { | |
14 | |
15 // The documentation for this class is in message_pump_glib.h | |
16 class MessagePumpObserver { | |
17 public: | |
18 // This method is called before processing a message. | |
19 virtual void WillProcessEvent(GdkEvent* event) = 0; | |
20 | |
21 // This method is called after processing a message. | |
22 virtual void DidProcessEvent(GdkEvent* event) = 0; | |
23 | |
24 protected: | |
25 virtual ~MessagePumpObserver() {} | |
26 }; | |
27 | |
28 // The documentation for this class is in message_pump_glib.h | |
29 // | |
30 // The nested loop is exited by either posting a quit, or returning false | |
31 // from Dispatch. | |
32 class MessagePumpDispatcher { | |
33 public: | |
34 // Dispatches the event. If true is returned processing continues as | |
35 // normal. If false is returned, the nested loop exits immediately. | |
36 virtual bool Dispatch(GdkEvent* event) = 0; | |
37 | |
38 protected: | |
39 virtual ~MessagePumpDispatcher() {} | |
40 }; | |
41 | |
42 // This class implements a message-pump for dispatching GTK events. | |
43 class BASE_EXPORT MessagePumpGtk : public MessagePumpGlib { | |
44 public: | |
45 MessagePumpGtk(); | |
46 | |
47 // Dispatch an available GdkEvent. Essentially this allows a subclass to do | |
48 // some task before/after calling the default handler (EventDispatcher). | |
49 void DispatchEvents(GdkEvent* event); | |
50 | |
51 // Returns default X Display. | |
52 static Display* GetDefaultXDisplay(); | |
53 | |
54 protected: | |
55 virtual ~MessagePumpGtk(); | |
56 | |
57 private: | |
58 // Invoked from EventDispatcher. Notifies all observers we're about to | |
59 // process an event. | |
60 void WillProcessEvent(GdkEvent* event); | |
61 | |
62 // Invoked from EventDispatcher. Notifies all observers we processed an | |
63 // event. | |
64 void DidProcessEvent(GdkEvent* event); | |
65 | |
66 // Callback prior to gdk dispatching an event. | |
67 static void EventDispatcher(GdkEvent* event, void* data); | |
68 | |
69 DISALLOW_COPY_AND_ASSIGN(MessagePumpGtk); | |
70 }; | |
71 | |
72 typedef MessagePumpGtk MessagePumpForUI; | |
73 | |
74 } // namespace base | |
75 | |
76 #endif // BASE_MESSAGE_LOOP_MESSAGE_PUMP_GTK_H_ | |
OLD | NEW |