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.
5 #ifndef UI_VIEWS_CONTROLS_NATIVE_NATIVE_VIEW_HOST_H_
6 #define UI_VIEWS_CONTROLS_NATIVE_NATIVE_VIEW_HOST_H_
10 #include "ui/gfx/native_widget_types.h"
11 #include "ui/views/view.h"
15 class NativeViewHostTestBase;
18 class NativeViewHostWrapper;
20 // If a NativeViewHost's native view is a Widget, this native window
21 // property is set on the widget, pointing to the owning NativeViewHost.
22 extern const char kWidgetNativeViewHostKey[];
24 // A View type that hosts a gfx::NativeView. The bounds of the native view are
25 // kept in sync with the bounds of this view as it is moved and sized.
26 // Under the hood, a platform-specific NativeViewHostWrapper implementation does
27 // the platform-specific work of manipulating the underlying OS widget type.
28 class VIEWS_EXPORT NativeViewHost : public View {
30 // The NativeViewHost's class name.
31 static const char kViewClassName[];
34 virtual ~NativeViewHost();
36 // Attach a gfx::NativeView to this View. Its bounds will be kept in sync
37 // with the bounds of this View until Detach is called.
39 // Because native views are positioned in the coordinates of their parent
40 // native view, this function should only be called after this View has been
41 // added to a View hierarchy hosted within a valid Widget.
42 void Attach(gfx::NativeView native_view);
44 // Detach the attached native view. Its bounds and visibility will no
45 // longer be manipulated by this View. The native view may be destroyed and
46 // detached before calling this function, and this has no effect in that case.
49 // Sets a preferred size for the native view attached to this View.
50 void SetPreferredSize(const gfx::Size& size);
52 // A NativeViewHost has an associated focus View so that the focus of the
53 // native control and of the View are kept in sync. In simple cases where the
54 // NativeViewHost directly wraps a native window as is, the associated view
55 // is this View. In other cases where the NativeViewHost is part of another
56 // view (such as TextField), the actual View is not the NativeViewHost and
57 // this method must be called to set that.
58 // This method must be called before Attach().
59 void set_focus_view(View* view) { focus_view_ = view; }
60 View* focus_view() { return focus_view_; }
62 // Fast resizing will move the native view and clip its visible region, this
63 // will result in white areas and will not resize the content (so scrollbars
64 // will be all wrong and content will flow offscreen). Only use this
65 // when you're doing extremely quick, high-framerate vertical resizes
66 // and don't care about accuracy. Make sure you do a real resize at the
67 // end. USE WITH CAUTION.
68 void set_fast_resize(bool fast_resize) { fast_resize_ = fast_resize; }
69 bool fast_resize() const { return fast_resize_; }
71 // Value of fast_resize() the last time Layout() was invoked.
72 bool fast_resize_at_last_layout() const {
73 return fast_resize_at_last_layout_;
76 // Accessor for |native_view_|.
77 gfx::NativeView native_view() const { return native_view_; }
79 void NativeViewDestroyed();
81 // Overridden from View:
82 virtual gfx::Size GetPreferredSize() const OVERRIDE;
83 virtual void Layout() OVERRIDE;
84 virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
85 virtual void VisibilityChanged(View* starting_from, bool is_visible) OVERRIDE;
86 virtual void OnFocus() OVERRIDE;
87 virtual gfx::NativeViewAccessible GetNativeViewAccessible() OVERRIDE;
88 virtual gfx::NativeCursor GetCursor(const ui::MouseEvent& event) OVERRIDE;
91 virtual bool GetNeedsNotificationWhenVisibleBoundsChange() const OVERRIDE;
92 virtual void OnVisibleBoundsChanged() OVERRIDE;
93 virtual void ViewHierarchyChanged(
94 const ViewHierarchyChangedDetails& details) OVERRIDE;
95 virtual const char* GetClassName() const OVERRIDE;
98 friend class test::NativeViewHostTestBase;
100 // Detach the native view. |destroyed| is true if the native view is
101 // detached because it's being destroyed, or false otherwise.
102 void Detach(bool destroyed);
104 // Invokes ViewRemoved() on the FocusManager for all the child Widgets of our
105 // NativeView. This is used when detaching to ensure the FocusManager doesn't
106 // have a reference to a View that is no longer reachable.
109 // The attached native view. There is exactly one native_view_ attached.
110 gfx::NativeView native_view_;
112 // A platform-specific wrapper that does the OS-level manipulation of the
113 // attached gfx::NativeView.
114 scoped_ptr<NativeViewHostWrapper> native_wrapper_;
116 // The preferred size of this View
117 gfx::Size preferred_size_;
119 // True if the native view is being resized using the fast method described
120 // in the setter/accessor above.
123 // Value of |fast_resize_| during the last call to Layout.
124 bool fast_resize_at_last_layout_;
126 // The view that should be given focus when this NativeViewHost is focused.
129 DISALLOW_COPY_AND_ASSIGN(NativeViewHost);
134 #endif // UI_VIEWS_CONTROLS_NATIVE_NATIVE_VIEW_HOST_H_