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      1 // Copyright (c) 2012 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 UI_VIEWS_COLOR_CHOOSER_COLOR_CHOOSER_VIEW_H_
      6 #define UI_VIEWS_COLOR_CHOOSER_COLOR_CHOOSER_VIEW_H_
      7 
      8 #include "base/basictypes.h"
      9 #include "base/compiler_specific.h"
     10 #include "third_party/skia/include/core/SkColor.h"
     11 #include "third_party/skia/include/core/SkScalar.h"
     12 #include "ui/views/controls/textfield/textfield_controller.h"
     13 #include "ui/views/views_export.h"
     14 #include "ui/views/widget/widget_delegate.h"
     15 
     16 namespace views {
     17 
     18 class ColorChooserListener;
     19 class Textfield;
     20 
     21 // ColorChooserView provides the UI to choose a color by mouse and/or keyboard.
     22 // It is typically used for <input type="color">.  Currently the user can
     23 // choose a color by dragging over the bar for hue and the area for saturation
     24 // and value.
     25 class VIEWS_EXPORT ColorChooserView : public WidgetDelegateView,
     26                                       public TextfieldController {
     27  public:
     28   ColorChooserView(ColorChooserListener* listener, SkColor initial_color);
     29   virtual ~ColorChooserView();
     30 
     31   // Called when its color value is changed in the web contents.
     32   void OnColorChanged(SkColor color);
     33 
     34   // Called when the user chooses a hue from the UI.
     35   void OnHueChosen(SkScalar hue);
     36 
     37   // Called when the user chooses saturation/value from the UI.
     38   void OnSaturationValueChosen(SkScalar saturation, SkScalar value);
     39 
     40   float hue() const { return hsv_[0]; }
     41   float saturation() const { return hsv_[1]; }
     42   float value() const { return hsv_[2]; }
     43   void set_listener(ColorChooserListener* listener) { listener_ = listener; }
     44 
     45  private:
     46   class HueView;
     47   class SaturationValueView;
     48   class SelectedColorPatchView;
     49 
     50   // WidgetDelegate overrides:
     51   virtual View* GetInitiallyFocusedView() OVERRIDE;
     52   virtual ui::ModalType GetModalType() const OVERRIDE;
     53   virtual void WindowClosing() OVERRIDE;
     54   virtual View* GetContentsView() OVERRIDE;
     55 
     56   // TextfieldController overrides:
     57   virtual void ContentsChanged(Textfield* sender,
     58                                const base::string16& new_contents) OVERRIDE;
     59   virtual bool HandleKeyEvent(Textfield* sender,
     60                               const ui::KeyEvent& key_event) OVERRIDE;
     61 
     62   // The current color in HSV coordinate.
     63   SkScalar hsv_[3];
     64 
     65   // The pointer to the current color chooser for callbacks.  It doesn't take
     66   // ownership on |listener_| so the user of this class should take care of
     67   // its lifetime.  See chrome/browser/ui/browser.cc for example.
     68   ColorChooserListener* listener_;
     69 
     70   // Child views. These are owned as part of the normal views hierarchy.
     71   // The view of hue chooser.
     72   HueView* hue_;
     73 
     74   // The view of saturation/value choosing area.
     75   SaturationValueView* saturation_value_;
     76 
     77   // The textfield to write the color explicitly.
     78   Textfield* textfield_;
     79 
     80   // The rectangle to denote the selected color.
     81   SelectedColorPatchView* selected_color_patch_;
     82 
     83   DISALLOW_COPY_AND_ASSIGN(ColorChooserView);
     84 };
     85 
     86 }  // namespace views
     87 
     88 #endif  // UI_VIEWS_COLOR_CHOOSER_COLOR_CHOOSER_VIEW_H_
     89