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   ~DefaultWindowResizer() override;
  19
  20   // Creates a new DefaultWindowResizer. The caller takes ownership of the
  21   // returned object.
  22   static DefaultWindowResizer* Create(wm::WindowState* window_state);
  23
  24   // Returns true if the drag will result in changing the window in anyway.
  25   bool is_resizable() const { return details().is_resizable; }
  26
  27   bool changed_size() const {
  28     return !(details().bounds_change & kBoundsChange_Repositions);
  29   }
  30
  31   // WindowResizer:
  32   void Drag(const gfx::Point& location, int event_flags) override;
  33   void CompleteDrag() override;
  34   void RevertDrag() override;
  35
  36  private:
  37   explicit DefaultWindowResizer(wm::WindowState* window_state);
  38
  39   // Set to true once Drag() is invoked and the bounds of the window change.
  40   bool did_move_or_resize_;
  41
  42   DISALLOW_COPY_AND_ASSIGN(DefaultWindowResizer);
  43 };
  44
  45 }  // namespace aura
  46
  47 #endif  // ASH_WM_DEFAULT_WINDOW_RESIZER_H_