ui/views/cocoa/bridged_native_widget_owner.h

   1 // Copyright 2015 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_COCOA_BRIDGED_NATIVE_WIDGET_OWNER_H_
   6 #define UI_VIEWS_COCOA_BRIDGED_NATIVE_WIDGET_OWNER_H_
   7
   8 namespace gfx {
   9 class Vector2d;
  10 }
  11
  12 @class NSWindow;
  13
  14 namespace views {
  15
  16 class BridgedNativeWidget;
  17
  18 // An abstract interface wrapping an NSWindow that ties the lifetime of one or
  19 // more child BridgedNativeWidgets to the lifetime of that NSWindow. This is not
  20 // simply an NSWindow, because the child window API provided by NSWindow
  21 // requires child windows to always be visible.
  22 class BridgedNativeWidgetOwner {
  23  public:
  24   // The NSWindow parent.
  25   virtual NSWindow* GetNSWindow() = 0;
  26
  27   // The offset in screen pixels for positioning child windows owned by |this|.
  28   virtual gfx::Vector2d GetChildWindowOffset() const = 0;
  29
  30   // Return false if |this| is hidden, or has a hidden ancestor.
  31   virtual bool IsVisibleParent() const = 0;
  32
  33   // Removes a child window. Note |this| may be deleted after calling, so the
  34   // caller should immediately null out the pointer used to make the call.
  35   virtual void RemoveChildWindow(BridgedNativeWidget* child) = 0;
  36
  37  protected:
  38   // Instances of this class may be self-deleting.
  39   virtual ~BridgedNativeWidgetOwner() {}
  40 };
  41
  42 }  // namespace views
  43
  44 #endif  // UI_VIEWS_COCOA_BRIDGED_NATIVE_WIDGET_OWNER_H_