Implements Touch calibrator controller and a skeleton for touch calibrator view.

chrome/browser/chromeos/display/touch_calibrator/touch_calibrator_view.h

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_CHROMEOS_DISPLAY_TOUCH_CALIBRATOR_TOUCH_CALIBRATOR_VIEW_H_
+#define CHROME_BROWSER_CHROMEOS_DISPLAY_TOUCH_CALIBRATOR_TOUCH_CALIBRATOR_VIEW_H_
+
+#include "base/macros.h"
+#include "ui/display/display.h"
+#include "ui/gfx/animation/animation_delegate.h"
+#include "ui/views/view.h"
+
+namespace views {
+class Widget;
+}
+
+namespace chromeos {
+
+// An overlay view used during touch calibration. This view is responsible for
+// all animations and UX during touch calibration on all displays currently
+// active on the device. The view on the display being calibrated is the primary
+// touch calibration view.
+// |TouchCalibratorView| acts as a state machine and has an API to toggle its
+// state or get the current state.
+class TouchCalibratorView : public views::View, public gfx::AnimationDelegate {
+ public:
+  // Different states of |TouchCalibratorView| in order.
+  enum State {
+    UNKNOWN = 0,
+    BACKGROUND_FADING_IN,  // Transition state where the background is fading
+                           // in.
+    DISPLAY_POINT_1,       // Static state where the touch point is at its first
+                           // location.
+    ANIMATING_1_TO_2,  // Transition state when the touch point is being moved
+                       // from one location to another.
+    DISPLAY_POINT_2,   // Static state where the touch point is at its second
+                       // location.
+    ANIMATING_2_TO_3,
+    DISPLAY_POINT_3,  // Static state where the touch point is at its third
+                      // location.
+    ANIMATING_3_TO_4,
+    DISPLAY_POINT_4,       // Static state where the touch point is at its final
+                           // location.
+    CALIBRATION_COMPLETE,  // Static state when the calibration complete message
+                           // is displayed to the user.
+    BACKGROUND_FADING_OUT  // Transition state where the background is fading
+                           // out
+  };
+
+  TouchCalibratorView(const display::Display& target_display,
+                      bool is_primary_view);
+  ~TouchCalibratorView() override;
+
+  // views::View overrides:
+  void OnPaint(gfx::Canvas* canvas) override;
+  void OnPaintBackground(gfx::Canvas* canvas) override;
+
+  // gfx::AnimationDelegate overrides:
+  void AnimationEnded(const gfx::Animation* animation) override;
+  void AnimationProgressed(const gfx::Animation* animation) override;
+  void AnimationCanceled(const gfx::Animation* animation) override;
+
+  // Returns the current state of the view.
+  State GetState() { return state_; }

[stevenjb, 2016/12/22 01:14:21]

state()

[malaykeshav, 2016/12/22 11:50:07]

Done

+
+  // Moves the touch calibrator view to its next state.
+  void NextState();

[stevenjb, 2016/12/22 01:14:21]

AdvanceToNextState()

[malaykeshav, 2016/12/22 11:50:07]

Done

+
+  // Skips to the final state. Should be used to cancel calibration and hide all
+  // views from the screen with a smooth transition out animation.
+  void SkipToFinalState();
+
+  // Returns true if |location| is set by the end of this function call. If set,
+  // |location| will point to the center of the circle that the user sees during
+  // the touch calibration UX.
+  bool GetTouchPointLocation(gfx::Point* location);
+
+ private:
+  // The target display on which this view is rendered on.
+  const display::Display display_;
+
+  // True if this view is on the display that is being calibrated.
+  bool is_primary_view_ = false;
+
+  std::unique_ptr<views::Widget> widget_;
+
+  State state_ = UNKNOWN;

[stevenjb, 2016/12/22 01:14:21]

blank line

[malaykeshav, 2016/12/22 11:50:08]

Done

+  DISALLOW_COPY_AND_ASSIGN(TouchCalibratorView);
+};
+}  // namespace chromeos
+#endif  // CHROME_BROWSER_CHROMEOS_DISPLAY_TOUCH_CALIBRATOR_TOUCH_CALIBRATOR_VIEW_H_