ui/views/controls/button/checkbox.h

   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_CONTROLS_BUTTON_CHECKBOX_H_
   6 #define UI_VIEWS_CONTROLS_BUTTON_CHECKBOX_H_
   7
   8 #include <string>
   9
  10 #include "base/compiler_specific.h"
  11 #include "base/strings/string16.h"
  12 #include "ui/views/controls/button/label_button.h"
  13
  14 namespace views {
  15
  16 // A native themed class representing a checkbox.  This class does not use
  17 // platform specific objects to replicate the native platforms looks and feel.
  18 class VIEWS_EXPORT Checkbox : public LabelButton {
  19  public:
  20   static const char kViewClassName[];
  21
  22   explicit Checkbox(const base::string16& label);
  23   ~Checkbox() override;
  24
  25   // Sets a listener for this checkbox. Checkboxes aren't required to have them
  26   // since their state can be read independently of them being toggled.
  27   void set_listener(ButtonListener* listener) { listener_ = listener; }
  28
  29   // Sets/Gets whether or not the checkbox is checked.
  30   virtual void SetChecked(bool checked);
  31   bool checked() const { return checked_; }
  32
  33  protected:
  34   // Overridden from LabelButton:
  35   void Layout() override;
  36   const char* GetClassName() const override;
  37   void GetAccessibleState(ui::AXViewState* state) override;
  38   void OnFocus() override;
  39   void OnBlur() override;
  40   const gfx::ImageSkia& GetImage(ButtonState for_state) override;
  41
  42   // Set the image shown for each button state depending on whether it is
  43   // [checked] or [focused].
  44   void SetCustomImage(bool checked,
  45                       bool focused,
  46                       ButtonState for_state,
  47                       const gfx::ImageSkia& image);
  48
  49  private:
  50   // Overridden from Button:
  51   void NotifyClick(const ui::Event& event) override;
  52
  53   ui::NativeTheme::Part GetThemePart() const override;
  54   void GetExtraParams(ui::NativeTheme::ExtraParams* params) const override;
  55
  56   // True if the checkbox is checked.
  57   bool checked_;
  58
  59   // The images for each button state.
  60   gfx::ImageSkia images_[2][2][STATE_COUNT];
  61
  62   DISALLOW_COPY_AND_ASSIGN(Checkbox);
  63 };
  64
  65 }  // namespace views
  66
  67 #endif  // UI_VIEWS_CONTROLS_BUTTON_CHECKBOX_H_