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Side by Side Diff: ui/base/win/hwnd_subclass.h

Issue 93863005: ui: Rename ui_export.h to ui_base_export.h (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: UI_BASE_IMPLEMENTATION Created 6 years, 11 months ago
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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 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 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #ifndef UI_BASE_WIN_HWND_SUBCLASS_H_ 5 #ifndef UI_BASE_WIN_HWND_SUBCLASS_H_
6 #define UI_BASE_WIN_HWND_SUBCLASS_H_ 6 #define UI_BASE_WIN_HWND_SUBCLASS_H_
7 7
8 #include <windows.h>
8 #include <vector> 9 #include <vector>
9 #include <windows.h>
10 10
11 #include "base/gtest_prod_util.h" 11 #include "base/gtest_prod_util.h"
12 #include "base/memory/scoped_ptr.h" 12 #include "base/memory/scoped_ptr.h"
13 #include "ui/base/ui_export.h" 13 #include "ui/base/ui_base_export.h"
14 #include "ui/base/view_prop.h" 14 #include "ui/base/view_prop.h"
15 15
16 namespace ui { 16 namespace ui {
17 17
18 // Classes implementing this interface get the opportunity to handle and consume 18 // Classes implementing this interface get the opportunity to handle and consume
19 // messages before they are sent to their target HWND. 19 // messages before they are sent to their target HWND.
20 class UI_EXPORT HWNDMessageFilter { 20 class UI_BASE_EXPORT HWNDMessageFilter {
21 public: 21 public:
22 virtual ~HWNDMessageFilter(); 22 virtual ~HWNDMessageFilter();
23 23
24 // A derived class overrides this method to perform filtering of the messages. 24 // A derived class overrides this method to perform filtering of the messages.
25 // Return true to prevent other HWNDMessageFilter's of the target HWND and the 25 // Return true to prevent other HWNDMessageFilter's of the target HWND and the
26 // system message handler |original_wnd_proc_| from receiving the message. 26 // system message handler |original_wnd_proc_| from receiving the message.
27 // Return false to propagate the message further to other HWNDMessageFilters 27 // Return false to propagate the message further to other HWNDMessageFilters
28 // and eventually to |original_wnd_proc|. 28 // and eventually to |original_wnd_proc|.
29 // The order in which HWNDMessageFilters are added in HWNDSubclass::AddFilter 29 // The order in which HWNDMessageFilters are added in HWNDSubclass::AddFilter
30 // determines which filter gets to see the message first (a filter added first 30 // determines which filter gets to see the message first (a filter added first
31 // will see the message first). 31 // will see the message first).
32 virtual bool FilterMessage(HWND hwnd, 32 virtual bool FilterMessage(HWND hwnd,
33 UINT message, 33 UINT message,
34 WPARAM w_param, 34 WPARAM w_param,
35 LPARAM l_param, 35 LPARAM l_param,
36 LRESULT* l_result) = 0; 36 LRESULT* l_result) = 0;
37 }; 37 };
38 38
39 // An object that instance-subclasses a window. If the window has already been 39 // An object that instance-subclasses a window. If the window has already been
40 // instance-subclassed, that subclassing is lost. 40 // instance-subclassed, that subclassing is lost.
41 class UI_EXPORT HWNDSubclass { 41 class UI_BASE_EXPORT HWNDSubclass {
42 public: 42 public:
43 ~HWNDSubclass(); 43 ~HWNDSubclass();
44 44
45 // Adds |filter| to the HWNDSubclass of |target|. Caller retains ownership of 45 // Adds |filter| to the HWNDSubclass of |target|. Caller retains ownership of
46 // |filter|. See the comment about the order in which filters are added in 46 // |filter|. See the comment about the order in which filters are added in
47 // HWNDMessageFilter::FilterMessage. 47 // HWNDMessageFilter::FilterMessage.
48 static void AddFilterToTarget(HWND target, HWNDMessageFilter* filter); 48 static void AddFilterToTarget(HWND target, HWNDMessageFilter* filter);
49 49
50 // Removes |filter| from any HWNDSubclass that has it. 50 // Removes |filter| from any HWNDSubclass that has it.
51 static void RemoveFilterFromAllTargets(HWNDMessageFilter* filter); 51 static void RemoveFilterFromAllTargets(HWNDMessageFilter* filter);
(...skipping 22 matching lines...) Expand all
74 std::vector<HWNDMessageFilter*> filters_; 74 std::vector<HWNDMessageFilter*> filters_;
75 WNDPROC original_wnd_proc_; 75 WNDPROC original_wnd_proc_;
76 ui::ViewProp prop_; 76 ui::ViewProp prop_;
77 77
78 DISALLOW_COPY_AND_ASSIGN(HWNDSubclass); 78 DISALLOW_COPY_AND_ASSIGN(HWNDSubclass);
79 }; 79 };
80 80
81 } // namespace ui 81 } // namespace ui
82 82
83 #endif // UI_BASE_WIN_HWND_SUBCLASS_H_ 83 #endif // UI_BASE_WIN_HWND_SUBCLASS_H_
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