Refactor VR Shell Input. Locks input to click/scroll targets.

chrome/browser/android/vr_shell/ui_elements/close_button.h

+// Copyright 2017 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_ANDROID_VR_SHELL_UI_ELEMENTS_CLOSE_BUTTON_H_
+#define CHROME_BROWSER_ANDROID_VR_SHELL_UI_ELEMENTS_CLOSE_BUTTON_H_
+
+#include <memory>
+
+#include "base/callback.h"
+#include "base/macros.h"
+#include "chrome/browser/android/vr_shell/ui_elements/textured_element.h"
+
+namespace vr_shell {
+
+class CloseButtonTexture;
+class UiTexture;
+
+class CloseButton : public TexturedElement {
+ public:
+  explicit CloseButton(base::Callback<void()> click_handler);
+  ~CloseButton() override;
+
+  void OnHoverLeave() override;
+  void OnHoverEnter(gfx::PointF position) override;
+  void OnButtonDown(gfx::PointF position) override;
+  void OnButtonUp(gfx::PointF position) override;
+
+ private:
+  UiTexture* GetTexture() const override;
+  void OnStateUpdated();
+
+  std::unique_ptr<CloseButtonTexture> texture_;
+  bool down_ = false;
+  bool hover_ = false;
+  base::Callback<void()> click_handler_;
+
+  DISALLOW_COPY_AND_ASSIGN(CloseButton);
+};
+
+}  // namespace vr_shell
+
+#endif  // CHROME_BROWSER_ANDROID_VR_SHELL_UI_ELEMENTS_CLOSE_BUTTON_H_