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      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_MAXIMIZE_BUBBLE_CONTROLLER_H_
      6 #define ASH_WM_MAXIMIZE_BUBBLE_CONTROLLER_H_
      7 
      8 #include "ash/ash_export.h"
      9 #include "ash/wm/workspace/maximize_bubble_frame_state.h"
     10 #include "ash/wm/workspace/snap_types.h"
     11 #include "base/memory/scoped_ptr.h"
     12 
     13 namespace aura {
     14 class Window;
     15 }
     16 
     17 namespace base {
     18 class Timer;
     19 }
     20 
     21 namespace views {
     22 class CustomButton;
     23 }
     24 
     25 namespace ash {
     26 
     27 class FrameMaximizeButton;
     28 
     29 // A class which shows a helper UI for the maximize button after a delay.
     30 class ASH_EXPORT MaximizeBubbleController {
     31  public:
     32   class Bubble;
     33 
     34   MaximizeBubbleController(FrameMaximizeButton* frame_maximize_button,
     35                            MaximizeBubbleFrameState maximize_type,
     36                            int appearance_delay_ms);
     37   // Called from the outside to destroy the interface to the UI visuals.
     38   // The visuals will then delete when possible (maybe asynchronously).
     39   virtual ~MaximizeBubbleController();
     40 
     41   // Update the UI visuals to reflect the previewed |snap_type| snapping state.
     42   void SetSnapType(SnapType snap_type);
     43 
     44   // To achieve proper Z-sorting with the snap animation, this window will be
     45   // presented above the phantom window.
     46   aura::Window* GetBubbleWindow();
     47 
     48   // Reset the delay of the menu creation (if it was not created yet).
     49   void DelayCreation();
     50 
     51   // Called to tell the owning FrameMaximizeButton that a button was clicked.
     52   void OnButtonClicked(SnapType snap_type);
     53 
     54   // Called to tell the the owning FrameMaximizeButton that the hover status
     55   // for a button has changed. |snap_type| can be either SNAP_LEFT, SNAP_RIGHT,
     56   // SNAP_MINIMIZE or SNAP_NONE.
     57   void OnButtonHover(SnapType snap_type);
     58 
     59   // Get the owning FrameMaximizeButton.
     60   FrameMaximizeButton* frame_maximize_button() {
     61     return frame_maximize_button_;
     62   }
     63 
     64   // The status of the associated window: Maximized or normal.
     65   MaximizeBubbleFrameState maximize_type() const { return maximize_type_; }
     66 
     67   // A unit test function to return buttons of the sub menu. |state| can be
     68   // either SNAP_LEFT, SNAP_RIGHT or SNAP_MINIMIZE.
     69   views::CustomButton* GetButtonForUnitTest(SnapType state);
     70 
     71  protected:
     72   // Called from the the Bubble class to destroy itself: It tells the owning
     73   // object that it will destroy itself asynchronously. The owner will then
     74   // destroy |this|.
     75   void RequestDestructionThroughOwner();
     76 
     77  private:
     78   // The function which creates the bubble once the delay is elapsed.
     79   void CreateBubble();
     80 
     81   // The owning button which is also the anchor for the menu.
     82   FrameMaximizeButton* frame_maximize_button_;
     83 
     84   // The bubble menu.
     85   Bubble* bubble_;
     86 
     87   // The current maximize state of the owning window.
     88   const MaximizeBubbleFrameState maximize_type_;
     89 
     90   // The timer for the delayed creation of the menu.
     91   scoped_ptr<base::Timer> timer_;
     92 
     93   // The appearance delay in ms (delay and fade in & fade out delay).
     94   const int appearance_delay_ms_;
     95 
     96   DISALLOW_COPY_AND_ASSIGN(MaximizeBubbleController);
     97 };
     98 
     99 }  // namespace ash
    100 
    101 #endif  // ASH_WM_MAXIMIZE_BUBBLE_CONTROLLER_H_
    102