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 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   void Clear() override;
  53
  54  private:
  55   ~TouchHudDebug() override;
  56
  57   void SetMode(Mode mode);
  58
  59   void UpdateTouchPointLabel(int index);
  60
  61   // Overriden from TouchObserverHUD.
  62   void OnTouchEvent(ui::TouchEvent* event) override;
  63   void OnDisplayMetricsChanged(const gfx::Display& display,
  64                                uint32_t metrics) override;
  65   void SetHudForRootWindowController(RootWindowController* controller) override;
  66   void UnsetHudForRootWindowController(
  67       RootWindowController* controller) override;
  68
  69   static const int kMaxTouchPoints = 32;
  70
  71   Mode mode_;
  72
  73   scoped_ptr<TouchLog> touch_log_;
  74
  75   TouchHudCanvas* canvas_;
  76   views::View* label_container_;
  77   views::Label* touch_labels_[kMaxTouchPoints];
  78
  79   DISALLOW_COPY_AND_ASSIGN(TouchHudDebug);
  80 };
  81
  82 }  // namespace ash
  83
  84 #endif  // ASH_TOUCH_TOUCH_HUD_DEBUG_H_