ash/wm/default_window_resizer.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_DEFAULT_WINDOW_RESIZER_H_
   6 #define ASH_WM_DEFAULT_WINDOW_RESIZER_H_
   7
   8 #include "ash/wm/window_resizer.h"
   9 #include "base/compiler_specific.h"
  10
  11 namespace ash {
  12
  13 // WindowResizer is used by ToplevelWindowEventFilter to handle dragging, moving
  14 // or resizing a window. All coordinates passed to this are in the parent
  15 // windows coordiantes.
  16 class ASH_EXPORT DefaultWindowResizer : public WindowResizer {
  17  public:
  18   virtual ~DefaultWindowResizer();
  19
  20   // Creates a new DefaultWindowResizer. The caller takes ownership of the
  21   // returned object. Returns NULL if not resizable.
  22   static DefaultWindowResizer* Create(aura::Window* window,
  23                                       const gfx::Point& location,
  24                                       int window_component,
  25                                       aura::client::WindowMoveSource source);
  26
  27   // Returns true if the drag will result in changing the window in anyway.
  28   bool is_resizable() const { return details_.is_resizable; }
  29
  30   bool changed_size() const {
  31     return !(details_.bounds_change & kBoundsChange_Repositions);
  32   }
  33   aura::Window* target_window() const { return details_.window; }
  34
  35   // WindowResizer:
  36   virtual void Drag(const gfx::Point& location, int event_flags) OVERRIDE;
  37   virtual void CompleteDrag(int event_flags) OVERRIDE;
  38   virtual void RevertDrag() OVERRIDE;
  39   virtual aura::Window* GetTarget() OVERRIDE;
  40   virtual const gfx::Point& GetInitialLocation() const OVERRIDE;
  41
  42  private:
  43   explicit DefaultWindowResizer(const Details& details);
  44
  45   const Details details_;
  46
  47   // Set to true once Drag() is invoked and the bounds of the window change.
  48   bool did_move_or_resize_;
  49
  50   DISALLOW_COPY_AND_ASSIGN(DefaultWindowResizer);
  51 };
  52
  53 }  // namespace aura
  54
  55 #endif  // ASH_WM_DEFAULT_WINDOW_RESIZER_H_