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1 // Copyright 2010 Google Inc. | |
2 // | |
3 // Licensed under the Apache License, Version 2.0 (the "License"); | |
4 // you may not use this file except in compliance with the License. | |
5 // You may obtain a copy of the License at | |
6 // | |
7 // http://www.apache.org/licenses/LICENSE-2.0 | |
8 // | |
9 // Unless required by applicable law or agreed to in writing, software | |
10 // distributed under the License is distributed on an "AS IS" BASIS, | |
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
12 // See the License for the specific language governing permissions and | |
13 // limitations under the License. | |
14 // ======================================================================== | |
15 | |
16 #ifndef OMAHA_UI_SPLASH_SCREEN_H_ | |
17 #define OMAHA_UI_SPLASH_SCREEN_H_ | |
18 | |
19 #include "base/scoped_ptr.h" | |
20 #include "omaha/base/scoped_any.h" | |
21 #include "omaha/base/synchronized.h" | |
22 #include "omaha/base/thread.h" | |
23 #include "omaha/base/wtl_atlapp_wrapper.h" | |
24 | |
25 namespace omaha { | |
26 | |
27 // Displays a splash screen while lengthy operations occur. Before the lengthy | |
28 // operation, the caller creates an instance of this class and calls Show() | |
29 // function on it. The Show() function then creates a thread to display the | |
30 // splash screen. The caller must call Dismiss() function to hide and destroy | |
31 // the splash screen once the lengthy operation is done. | |
32 class SplashScreen | |
33 : public CAxDialogImpl<SplashScreen>, | |
34 public Runnable { | |
35 public: | |
36 explicit SplashScreen(const CString& bundle_name); | |
37 | |
38 // The desctructor waits up to 60 seconds for the message loop thread to exit | |
39 // if it is running. | |
40 virtual ~SplashScreen(); | |
41 | |
42 // The dialog resource ID as required by CAxDialogImpl. | |
43 const int IDD; | |
44 | |
45 // Spawns a thread which creates and shows the window. | |
46 void Show(); | |
47 | |
48 // Closes the window gradually if the window is visible. | |
49 void Dismiss(); | |
50 | |
51 // Runnable interface method. | |
52 virtual void Run(); | |
53 | |
54 BEGIN_MSG_MAP(SplashScreen) | |
55 MESSAGE_HANDLER(WM_TIMER, OnTimer) | |
56 MESSAGE_HANDLER(WM_CLOSE, OnClose) | |
57 MESSAGE_HANDLER(WM_DESTROY, OnDestroy) | |
58 END_MSG_MAP() | |
59 | |
60 private: | |
61 friend class SplashScreenTest; | |
62 | |
63 // States that help to determine the splash screen life cycle and | |
64 // allowed operations at each stage. | |
65 enum WindowState { | |
66 STATE_CREATED, | |
67 STATE_INITIALIZED, | |
68 STATE_SHOW_NORMAL, | |
69 STATE_FADING, | |
70 STATE_CLOSED, | |
71 }; | |
72 | |
73 // Creates the window and adjusts its size and apperance. | |
74 HRESULT Initialize(); | |
75 | |
76 void InitProgressBar(); | |
77 void EnableSystemButtons(bool enable); | |
78 | |
79 void SwitchToState(WindowState new_state); | |
80 | |
81 // Posts a WM_CLOSE message to close the window if the window is valid. | |
82 void Close(); | |
83 | |
84 // Message and command handlers. | |
85 LRESULT OnTimer(UINT msg, | |
86 WPARAM wparam, | |
87 LPARAM lparam, | |
88 BOOL& handled); // NOLINT(runtime/references) | |
89 LRESULT OnClose(UINT msg, | |
90 WPARAM wparam, | |
91 LPARAM lparam, | |
92 BOOL& handled); // NOLINT(runtime/references) | |
93 LRESULT OnDestroy(UINT msg, | |
94 WPARAM wparam, | |
95 LPARAM lparam, | |
96 BOOL& handled); // NOLINT(runtime/references) | |
97 | |
98 LLock lock_; // Lock for access synchronization of this object. | |
99 Thread thread_; // Thread that creats the window and runs the message loop. | |
100 WindowState state_; // State of the object. | |
101 | |
102 // Indicates whether timer for fading effect has been created. | |
103 bool timer_created_; | |
104 | |
105 int alpha_index_; // Array index of current alpha blending value. | |
106 | |
107 CString text_; // Message text shows on the window. | |
108 CString caption_; // Dialog title. | |
109 | |
110 // Handle to large icon to show when ALT-TAB | |
111 scoped_hicon hicon_; | |
112 | |
113 DISALLOW_COPY_AND_ASSIGN(SplashScreen); | |
114 }; | |
115 | |
116 } // namespace omaha | |
117 | |
118 #endif // OMAHA_UI_SPLASH_SCREEN_H_ | |
119 | |
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