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