text: // 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_CONTROLS_BUTTON_LABEL_BUTTON_BORDER_H_
  #define UI_VIEWS_CONTROLS_BUTTON_LABEL_BUTTON_BORDER_H_
  
  #include <memory>
  
  #include "base/compiler_specific.h"
  #include "base/macros.h"
  #include "ui/gfx/geometry/insets.h"
  #include "ui/views/border.h"
  #include "ui/views/controls/button/button.h"
  #include "ui/views/painter.h"
  
  namespace views {
  
  // An empty Border with customizable insets used by a LabelButton.
  class VIEWS_EXPORT LabelButtonBorder : public Border {
   public:
    LabelButtonBorder();
    ~LabelButtonBorder() override;
  
    void set_insets(const gfx::Insets& insets) { insets_ = insets; }
  
    // Returns true if |this| is able to paint for the given |focused| and |state|
    // values.
    virtual bool PaintsButtonState(bool focused, Button::ButtonState state);
  
    // Overridden from Border:
    void Paint(const View& view, gfx::Canvas* canvas) override;
    gfx::Insets GetInsets() const override;
    gfx::Size GetMinimumSize() const override;
  
   private:
    gfx::Insets insets_;
  
    DISALLOW_COPY_AND_ASSIGN(LabelButtonBorder);
  };
  
  // A Border that paints a LabelButton's background frame using image assets.
  class VIEWS_EXPORT LabelButtonAssetBorder : public LabelButtonBorder {
   public:
    explicit LabelButtonAssetBorder(Button::ButtonStyle style);
    ~LabelButtonAssetBorder() override;
  
    // Returns the default insets for a given |style|.
    static gfx::Insets GetDefaultInsetsForStyle(Button::ButtonStyle style);
  
    // Overridden from LabelButtonBorder:
    bool PaintsButtonState(bool focused, Button::ButtonState state) override;
  
    // Overridden from Border:
    void Paint(const View& view, gfx::Canvas* canvas) override;
    gfx::Size GetMinimumSize() const override;
  
    // Get or set the painter used for the specified |focused| button |state|.
    // LabelButtonAssetBorder takes and retains ownership of |painter|.
    Painter* GetPainter(bool focused, Button::ButtonState state);
    void SetPainter(bool focused,
                    Button::ButtonState state,
                    std::unique_ptr<Painter> painter);
  
   private:
    // The painters used for each unfocused or focused button state.
    std::unique_ptr<Painter> painters_[2][Button::STATE_COUNT];
  
    DISALLOW_COPY_AND_ASSIGN(LabelButtonAssetBorder);
  };
  
  }  // namespace views
  
  #endif  // UI_VIEWS_CONTROLS_BUTTON_LABEL_BUTTON_BORDER_H_
  