ash/wm/workspace/phantom_window_controller.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 ASH_WM_WORKSPACE_PHANTOM_WINDOW_CONTROLLER_H_
   6 #define ASH_WM_WORKSPACE_PHANTOM_WINDOW_CONTROLLER_H_
   7
   8 #include "ash/ash_export.h"
   9 #include "base/basictypes.h"
  10 #include "base/memory/scoped_ptr.h"
  11 #include "ui/gfx/rect.h"
  12
  13 namespace aura {
  14 class Window;
  15 }
  16
  17 namespace views {
  18 class Widget;
  19 }
  20
  21 namespace ash {
  22
  23 // PhantomWindowController is responsible for showing a phantom representation
  24 // of a window. It's used to show a preview of how snapping or docking a window
  25 // will affect the window's bounds.
  26 class ASH_EXPORT PhantomWindowController {
  27  public:
  28   explicit PhantomWindowController(aura::Window* window);
  29
  30   // Hides the phantom window without any animation.
  31   virtual ~PhantomWindowController();
  32
  33   // Shows the phantom window and animates shrinking it to |bounds_in_screen|.
  34   void Show(const gfx::Rect& bounds_in_screen);
  35
  36  private:
  37   friend class PhantomWindowControllerTest;
  38
  39   // Creates, shows and returns a phantom widget at |bounds|
  40   // with kShellWindowId_ShelfContainer in |root_window| as a parent.
  41   scoped_ptr<views::Widget> CreatePhantomWidget(
  42       aura::Window* root_window,
  43       const gfx::Rect& bounds_in_screen);
  44
  45   // Window that the phantom window is stacked above.
  46   aura::Window* window_;
  47
  48   // Target bounds (including the shadows if any) of the animation in screen
  49   // coordinates.
  50   gfx::Rect target_bounds_in_screen_;
  51
  52   // Phantom representation of the window.
  53   scoped_ptr<views::Widget> phantom_widget_;
  54
  55   DISALLOW_COPY_AND_ASSIGN(PhantomWindowController);
  56 };
  57
  58 }  // namespace ash
  59
  60 #endif  // ASH_WM_WORKSPACE_PHANTOM_WINDOW_CONTROLLER_H_