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| 1 // Copyright (c) 2011 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 VIEWS_CONTROLS_NATIVE_CONTROL_WIN_H_ | |
| 6 #define VIEWS_CONTROLS_NATIVE_CONTROL_WIN_H_ | |
| 7 #pragma once | |
| 8 | |
| 9 #include "base/basictypes.h" | |
| 10 #include "base/compiler_specific.h" | |
| 11 #include "base/memory/scoped_vector.h" | |
| 12 #include "ui/views/controls/native/native_view_host.h" | |
| 13 #include "ui/views/widget/child_window_message_processor.h" | |
| 14 | |
| 15 namespace ui { | |
| 16 class ViewProp; | |
| 17 } | |
| 18 | |
| 19 namespace views { | |
| 20 | |
| 21 // A View that hosts a native Windows control. | |
| 22 class NativeControlWin : public ChildWindowMessageProcessor, | |
| 23 public NativeViewHost { | |
| 24 public: | |
| 25 NativeControlWin(); | |
| 26 virtual ~NativeControlWin(); | |
| 27 | |
| 28 // Called by our subclassed window procedure when a WM_KEYDOWN message is | |
| 29 // received by the HWND created by an object derived from NativeControlWin. | |
| 30 // Returns true if the key was processed, false otherwise. | |
| 31 virtual bool OnKeyDown(int vkey) { return false; } | |
| 32 | |
| 33 // Overridden from ChildWindowMessageProcessor: | |
| 34 virtual bool ProcessMessage(UINT message, | |
| 35 WPARAM w_param, | |
| 36 LPARAM l_param, | |
| 37 LRESULT* result) OVERRIDE; | |
| 38 | |
| 39 // Overridden from View: | |
| 40 virtual void OnEnabledChanged() OVERRIDE; | |
| 41 | |
| 42 protected: | |
| 43 virtual void ViewHierarchyChanged(bool is_add, | |
| 44 View* parent, | |
| 45 View* child) OVERRIDE; | |
| 46 virtual void VisibilityChanged(View* starting_from, bool is_visible) OVERRIDE; | |
| 47 virtual void OnFocus() OVERRIDE; | |
| 48 | |
| 49 // Called by the containing NativeWidgetWin when a WM_CONTEXTMENU message is | |
| 50 // received from the HWND created by an object derived from NativeControlWin. | |
| 51 virtual void ShowContextMenu(const gfx::Point& location); | |
| 52 | |
| 53 // Called when the NativeControlWin is attached to a View hierarchy with a | |
| 54 // valid Widget. The NativeControlWin should use this opportunity to create | |
| 55 // its associated HWND. | |
| 56 virtual void CreateNativeControl() = 0; | |
| 57 | |
| 58 // MUST be called by the subclass implementation of |CreateNativeControl| | |
| 59 // immediately after creating the control HWND, otherwise it won't be attached | |
| 60 // to the NativeViewHost and will be effectively orphaned. | |
| 61 virtual void NativeControlCreated(HWND native_control); | |
| 62 | |
| 63 // Returns additional extended style flags. When subclasses call | |
| 64 // CreateWindowEx in order to create the underlying control, they must OR the | |
| 65 // ExStyle parameter with the value returned by this function. | |
| 66 // | |
| 67 // We currently use this method in order to add flags such as WS_EX_LAYOUTRTL | |
| 68 // to the HWND for views with right-to-left UI layout. | |
| 69 DWORD GetAdditionalExStyle() const; | |
| 70 | |
| 71 // TODO(xji): we use the following temporary function as we transition the | |
| 72 // various native controls to use the right set of RTL flags. This function | |
| 73 // will go away (and be replaced by GetAdditionalExStyle()) once all the | |
| 74 // controls are properly transitioned. | |
| 75 DWORD GetAdditionalRTLStyle() const; | |
| 76 | |
| 77 private: | |
| 78 typedef ScopedVector<ui::ViewProp> ViewProps; | |
| 79 | |
| 80 // Called by the containing NativeWidgetWin when a message of type | |
| 81 // WM_CTLCOLORBTN or WM_CTLCOLORSTATIC is sent from the HWND created by an | |
| 82 // object derived from NativeControlWin. | |
| 83 LRESULT GetControlColor(UINT message, HDC dc, HWND sender); | |
| 84 | |
| 85 // Our subclass window procedure for the attached control. | |
| 86 static LRESULT CALLBACK NativeControlWndProc(HWND window, | |
| 87 UINT message, | |
| 88 WPARAM w_param, | |
| 89 LPARAM l_param); | |
| 90 | |
| 91 // The window procedure before we subclassed. | |
| 92 WNDPROC original_wndproc_; | |
| 93 | |
| 94 ViewProps props_; | |
| 95 | |
| 96 DISALLOW_COPY_AND_ASSIGN(NativeControlWin); | |
| 97 }; | |
| 98 | |
| 99 } // namespace views | |
| 100 | |
| 101 #endif // VIEWS_CONTROLS_NATIVE_CONTROL_WIN_H_ | |
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