Home | History | Annotate | Download | only in touch 
      1 // Copyright 2013 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_TOUCH_TOUCH_HUD_DEBUG_H_
      6 #define ASH_TOUCH_TOUCH_HUD_DEBUG_H_
      7 
      8 #include <map>
      9 
     10 #include "ash/ash_export.h"
     11 #include "ash/touch/touch_observer_hud.h"
     12 #include "base/memory/scoped_ptr.h"
     13 #include "base/values.h"
     14 
     15 namespace views {
     16 class Label;
     17 class View;
     18 }
     19 
     20 namespace ash {
     21 class TouchHudCanvas;
     22 class TouchLog;
     23 
     24 // A heads-up display to show touch traces on the screen and log touch events.
     25 // As a derivative of TouchObserverHUD, objects of this class manage their own
     26 // lifetime.
     27 class ASH_EXPORT TouchHudDebug : public TouchObserverHUD {
     28  public:
     29   enum Mode {
     30     FULLSCREEN,
     31     REDUCED_SCALE,
     32     INVISIBLE,
     33   };
     34 
     35   explicit TouchHudDebug(aura::Window* initial_root);
     36 
     37   // Returns the log of touch events for all displays as a dictionary mapping id
     38   // of each display to its touch log.
     39   static scoped_ptr<base::DictionaryValue> GetAllAsDictionary();
     40 
     41   // Changes the display mode (e.g. scale, visibility). Calling this repeatedly
     42   // cycles between a fixed number of display modes.
     43   void ChangeToNextMode();
     44 
     45   // Returns log of touch events as a list value. Each item in the list is a
     46   // trace of one touch point.
     47   scoped_ptr<base::ListValue> GetLogAsList() const;
     48 
     49   Mode mode() const { return mode_; }
     50 
     51   // Overriden from TouchObserverHUD.
     52   virtual void Clear() OVERRIDE;
     53 
     54  private:
     55   virtual ~TouchHudDebug();
     56 
     57   void SetMode(Mode mode);
     58 
     59   void UpdateTouchPointLabel(int index);
     60 
     61   // Overriden from TouchObserverHUD.
     62   virtual void OnTouchEvent(ui::TouchEvent* event) OVERRIDE;
     63   virtual void OnDisplayMetricsChanged(const gfx::Display& display,
     64                                        uint32_t metrics) OVERRIDE;
     65   virtual void SetHudForRootWindowController(
     66       RootWindowController* controller) OVERRIDE;
     67   virtual void UnsetHudForRootWindowController(
     68       RootWindowController* controller) OVERRIDE;
     69 
     70   static const int kMaxTouchPoints = 32;
     71 
     72   Mode mode_;
     73 
     74   scoped_ptr<TouchLog> touch_log_;
     75 
     76   TouchHudCanvas* canvas_;
     77   views::View* label_container_;
     78   views::Label* touch_labels_[kMaxTouchPoints];
     79 
     80   DISALLOW_COPY_AND_ASSIGN(TouchHudDebug);
     81 };
     82 
     83 }  // namespace ash
     84 
     85 #endif  // ASH_TOUCH_TOUCH_HUD_DEBUG_H_
     86