ui/aura/root_window_host_delegate.h

   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
   3 // found in the LICENSE file.
   4
   5 #ifndef UI_AURA_ROOT_WINDOW_HOST_DELEGATE_H_
   6 #define UI_AURA_ROOT_WINDOW_HOST_DELEGATE_H_
   7
   8 #include "ui/aura/aura_export.h"
   9
  10 namespace gfx {
  11 class Point;
  12 class Rect;
  13 class Size;
  14 }
  15
  16 namespace ui {
  17 class Event;
  18 class KeyEvent;
  19 class MouseEvent;
  20 class ScrollEvent;
  21 class TouchEvent;
  22 }
  23
  24 namespace aura {
  25
  26 class RootWindow;
  27
  28 // A private interface used by RootWindowHost implementations to communicate
  29 // with their owning RootWindow.
  30 class AURA_EXPORT RootWindowHostDelegate {
  31  public:
  32   virtual bool OnHostKeyEvent(ui::KeyEvent* event) = 0;
  33   virtual bool OnHostMouseEvent(ui::MouseEvent* event) = 0;
  34   virtual bool OnHostScrollEvent(ui::ScrollEvent* event) = 0;
  35   virtual bool OnHostTouchEvent(ui::TouchEvent* event) = 0;
  36   virtual void OnHostCancelMode() = 0;
  37
  38   // Called when the windowing system activates the window.
  39   virtual void OnHostActivated() = 0;
  40
  41   // Called when system focus is changed to another window.
  42   virtual void OnHostLostWindowCapture() = 0;
  43
  44   // Called when the windowing system has mouse grab because it's performing a
  45   // window move on our behalf, but we should still paint as if we're active.
  46   virtual void OnHostLostMouseGrab() = 0;
  47
  48   virtual void OnHostPaint(const gfx::Rect& damage_rect) = 0;
  49
  50   virtual void OnHostMoved(const gfx::Point& origin) = 0;
  51   virtual void OnHostResized(const gfx::Size& size) = 0;
  52
  53   virtual float GetDeviceScaleFactor() = 0;
  54
  55   virtual RootWindow* AsRootWindow() = 0;
  56
  57  protected:
  58   virtual ~RootWindowHostDelegate() {}
  59 };
  60
  61 }  // namespace aura
  62
  63 #endif  // UI_AURA_ROOT_WINDOW_HOST_DELEGATE_H_