Initial implementation of ColorChooser for Aura.

ui/views/color_chooser/color_chooser_view.h

+// Copyright (c) 2012 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 UI_VIEWS_COLOR_CHOOSER_COLOR_CHOOSER_VIEW_H_
+#define UI_VIEWS_COLOR_CHOOSER_COLOR_CHOOSER_VIEW_H_
+#pragma once
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "third_party/skia/include/core/SkColor.h"
+#include "third_party/skia/include/core/SkScalar.h"
+#include "ui/views/controls/textfield/textfield_controller.h"
+#include "ui/views/views_export.h"
+#include "ui/views/widget/widget_delegate.h"
+
+namespace views {
+
+class ColorChooserListener;
+class KeyEvent;
+class Textfield;
+
+// ColorChooserView provides the UI to choose a color by mouse and/or keyboard.
+// It is typically used for <input type="color">.  Currently the user can
+// choose a color by dragging over the bar for hue and the area for saturation
+// and value. See also:
+// http://dev.chromium.org/developers/design-documents/aura/ash-color-chooser

[Peter Kasting, 2012/06/19 21:10:31]

Nit: It's easy for external documentation to be moved, changed, or deleted
without realizing that source code refers to it.  Consider putting everything
you need to say directly into this comment without external references.

[Jun Mukai, 2012/06/20 09:29:08]

Then removed the link itself.  I think the existing description is enough to
understand what will be there.

+class VIEWS_EXPORT ColorChooserView : public WidgetDelegateView,
+                                      public TextfieldController {
+ public:
+  ColorChooserView(ColorChooserListener* listener, SkColor initial_color);
+  virtual ~ColorChooserView();
+
+  // Called when its owning window will be closed.
+  void OnOwningWindowClosed();
+
+  // Called when its color value is changed in the web contents.
+  void OnColorChanged(SkColor color);
+
+  // Called when the user chooses a hue from the UI.
+  void OnHueChosen(float hue);
+
+  // Called when the user chooses saturation/value from the UI.
+  void OnSaturationValueChosen(float saturation, float value);
+
+  float hue() const { return hsv_[0]; }
+  float saturation() const { return hsv_[1]; }
+  float value() const { return hsv_[2]; }
+
+ private:
+  class HueView;
+  class SaturationValueView;
+
+  // WidgetDelegate overrides:
+  virtual ui::ModalType GetModalType() const OVERRIDE;
+  virtual void WindowClosing() OVERRIDE;
+  virtual View* GetContentsView() OVERRIDE;
+
+  // TextfieldController overrides:
+  virtual void ContentsChanged(Textfield* sender,
+                               const string16& new_contents) OVERRIDE;
+  virtual bool HandleKeyEvent(Textfield* sender,
+                              const KeyEvent& key_event) OVERRIDE;
+
+  SkScalar hsv_[3];
+  ColorChooserListener* listener_;
+  HueView* hue_;
+  SaturationValueView* saturation_value_;
+  Textfield* textfield_;
+
+  DISALLOW_COPY_AND_ASSIGN(ColorChooserView);
+};
+
+}  // namespace views
+
+#endif  // UI_VIEWS_COLOR_CHOOSER_COLOR_CHOOSER_VIEW_H_