ash/touch/touch_hud_debug.h

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