osb/source/windowing/StarButtonWidget.hpp

#ifndef STAR_BUTTON_WIDGET_HPP
#define STAR_BUTTON_WIDGET_HPP

#include "StarButtonGroup.hpp"

namespace Star {

STAR_CLASS(ButtonWidget);

class ButtonWidget : public Widget {
public:
  ButtonWidget();
  ButtonWidget(WidgetCallbackFunc callback,
      String const& baseImage,
      String const& hoverImage = "",
      String const& pressedImage = "",
      String const& disabledImage = "");
  virtual ~ButtonWidget();

  virtual bool sendEvent(InputEvent const& event) override;
  virtual void mouseOver() override;
  virtual void mouseOut() override;
  virtual void mouseReturnStillDown() override;
  virtual void hide() override;

  // Callback is called when the checked / pressed state is changed.
  void setCallback(WidgetCallbackFunc callback);

  ButtonGroupPtr buttonGroup() const;
  // Sets the button group for this widget, and adds it to the button group if
  // it is not already added.  Additionally, sets the button as checkable.
  void setButtonGroup(ButtonGroupPtr buttonGroup, int id = ButtonGroup::NoButton);
  // If a button group is set, returns this button's id in the button group.
  int buttonGroupId();

  bool isHovered() const;

  bool isPressed() const;
  void setPressed(bool pressed);

  bool isCheckable() const;
  void setCheckable(bool checkable);

  bool isHighlighted() const;
  void setHighlighted(bool highlighted);

  bool isChecked() const;
  void setChecked(bool checked);
  // Either checks a button, or toggles the state, depending on whether the
  // button is part of an exclusive group or not.
  void check();

  bool sustainCallbackOnDownHold();
  void setSustainCallbackOnDownHold(bool sustain);

  void setImages(String const& baseImage,
      String const& hoverImage = "",
      String const& pressedImage = "",
      String const& disabledImage = "");
  void setCheckedImages(String const& baseImage,
      String const& hoverImage = "",
      String const& pressedImage = "",
      String const& disabledImage = "");
  void setOverlayImage(String const& overlayImage = "");

  // Used to offset drawing when the button is being pressed / checked
  Vec2I const& pressedOffset() const;
  void setPressedOffset(Vec2I const& offset);

  virtual void setText(String const& text);
  virtual void setFontSize(int size);
  virtual void setFontDirectives(String directives);
  virtual void setTextOffset(Vec2I textOffset);

  void setTextAlign(HorizontalAnchor hAnchor);
  void setFontColor(Color color);
  void setFontColorDisabled(Color color);
  void setFontColorChecked(Color color);

  virtual WidgetPtr getChildAt(Vec2I const& pos) override;

  void disable();
  void enable();
  void setEnabled(bool enabled);

  void setInvisible(bool invisible);

protected:
  virtual RectI getScissorRect() const override;
  virtual void renderImpl() override;

  void drawButtonPart(String const& image, Vec2F const& position);
  void updateSize();

  WidgetCallbackFunc m_callback;
  ButtonGroupPtr m_buttonGroup;

  bool m_hovered;
  bool m_pressed;
  bool m_checkable;
  bool m_checked;

  bool m_disabled;
  bool m_highlighted;

  String m_baseImage;
  String m_hoverImage;
  String m_pressedImage;
  String m_disabledImage;

  bool m_hasCheckedImages;
  String m_baseImageChecked;
  String m_hoverImageChecked;
  String m_pressedImageChecked;
  String m_disabledImageChecked;

  String m_overlayImage;

  bool m_invisible;

  Vec2I m_pressedOffset;
  Vec2U m_buttonBoundSize;

  int m_fontSize;
  String m_font;
  String m_fontDirectives;
  String m_text;
  Vec2I m_textOffset;

  bool m_sustain;

private:
  HorizontalAnchor m_hTextAnchor;
  Color m_fontColor;
  Color m_fontColorDisabled;
  Maybe<Color> m_fontColorChecked;
};

}

#endif