src/ash/wm/panels/attached_panel_window_targeter.h

   1 // Copyright 2014 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 ASH_WM_PANELS_ATTACHED_PANEL_WINDOW_TARGETER_H_
   6 #define ASH_WM_PANELS_ATTACHED_PANEL_WINDOW_TARGETER_H_
   7
   8 #include "ash/shell_observer.h"
   9 #include "ui/wm/core/easy_resize_window_targeter.h"
  10
  11 namespace ash {
  12
  13 class PanelLayoutManager;
  14
  15 // A window targeter installed on a panel container to disallow touch
  16 // hit-testing of attached panel edges that are adjacent to the shelf. This
  17 // makes it significantly easier to correctly target shelf buttons with touch.
  18 class AttachedPanelWindowTargeter : public ::wm::EasyResizeWindowTargeter,
  19                                     public ShellObserver {
  20  public:
  21   AttachedPanelWindowTargeter(aura::Window* container,
  22                               const gfx::Insets& default_mouse_extend,
  23                               const gfx::Insets& default_touch_extend,
  24                               PanelLayoutManager* panel_layout_manager);
  25   virtual ~AttachedPanelWindowTargeter();
  26
  27   // ShellObserver:
  28   virtual void OnShelfCreatedForRootWindow(aura::Window* root_window) OVERRIDE;
  29   virtual void OnShelfAlignmentChanged(aura::Window* root_window) OVERRIDE;
  30
  31  private:
  32   void UpdateTouchExtend(aura::Window* root_window);
  33
  34   aura::Window* panel_container_;
  35   PanelLayoutManager* panel_layout_manager_;
  36   gfx::Insets default_touch_extend_;
  37
  38   DISALLOW_COPY_AND_ASSIGN(AttachedPanelWindowTargeter);
  39 };
  40
  41 }  // namespace ash
  42
  43 #endif  // ASH_WM_PANELS_ATTACHED_PANEL_WINDOW_TARGETER_H_