ScrollBar::LookAndFeelMethods Struct Reference

This abstract base class is implemented by LookAndFeel classes to provide scrollbar-drawing functionality. More...

Inheritance diagram for ScrollBar::LookAndFeelMethods:

Public Member Functions
virtual	~LookAndFeelMethods ()=default
virtual bool	areScrollbarButtonsVisible ()=0
virtual void	drawScrollbarButton (Graphics &g, ScrollBar &scrollbar, int width, int height, int buttonDirection, bool isScrollbarVertical, bool isMouseOverButton, bool isButtonDown)=0
	Draws one of the buttons on a scrollbar.
virtual void	drawScrollbar (Graphics &g, ScrollBar &scrollbar, int x, int y, int width, int height, bool isScrollbarVertical, int thumbStartPosition, int thumbSize, bool isMouseOver, bool isMouseDown)=0
	Draws the thumb area of a scrollbar.
virtual ImageEffectFilter *	getScrollbarEffect ()=0
	Returns the component effect to use for a scrollbar.
virtual int	getMinimumScrollbarThumbSize (ScrollBar &)=0
	Returns the minimum length in pixels to use for a scrollbar thumb.
virtual int	getDefaultScrollbarWidth ()=0
	Returns the default thickness to use for a scrollbar.
virtual int	getScrollbarButtonSize (ScrollBar &)=0
	Returns the length in pixels to use for a scrollbar button.

Detailed Description

This abstract base class is implemented by LookAndFeel classes to provide scrollbar-drawing functionality.

Constructor & Destructor Documentation

~LookAndFeelMethods()

virtual ScrollBar::LookAndFeelMethods::~LookAndFeelMethods ( )

virtualdefault

Member Function Documentation

areScrollbarButtonsVisible()

virtual bool ScrollBar::LookAndFeelMethods::areScrollbarButtonsVisible ( )

pure virtual

Implemented in LookAndFeel_V2, and LookAndFeel_V3.

drawScrollbarButton()

virtual void ScrollBar::LookAndFeelMethods::drawScrollbarButton ( Graphics & g, ScrollBar & scrollbar, int width, int height, int buttonDirection, bool isScrollbarVertical, bool isMouseOverButton, bool isButtonDown )

pure virtual

Draws one of the buttons on a scrollbar.

Parameters

g	the context to draw into
scrollbar	the bar itself
width	the width of the button
height	the height of the button
buttonDirection	the direction of the button, where 0 = up, 1 = right, 2 = down, 3 = left
isScrollbarVertical	true if it's a vertical bar, false if horizontal
isMouseOverButton	whether the mouse is currently over the button (also true if it's held down)
isButtonDown	whether the mouse button's held down

Implemented in LookAndFeel_V1, and LookAndFeel_V2.

References ScrollBar::ScrollBar().

drawScrollbar()

virtual void ScrollBar::LookAndFeelMethods::drawScrollbar ( Graphics & g, ScrollBar & scrollbar, int x, int y, int width, int height, bool isScrollbarVertical, int thumbStartPosition, int thumbSize, bool isMouseOver, bool isMouseDown )

pure virtual

Draws the thumb area of a scrollbar.

Parameters

g	the context to draw into
scrollbar	the bar itself
x	the x position of the left edge of the thumb area to draw in
y	the y position of the top edge of the thumb area to draw in
width	the width of the thumb area to draw in
height	the height of the thumb area to draw in
isScrollbarVertical	true if it's a vertical bar, false if horizontal
thumbStartPosition	for vertical bars, the y coordinate of the top of the thumb, or its x position for horizontal bars
thumbSize	for vertical bars, the height of the thumb, or its width for horizontal bars. This may be 0 if the thumb shouldn't be drawn.
isMouseOver	whether the mouse is over the thumb area, also true if the mouse is currently dragging the thumb
isMouseDown	whether the mouse is currently dragging the scrollbar

Implemented in LookAndFeel_V1, LookAndFeel_V2, LookAndFeel_V3, and LookAndFeel_V4.

References Component::isMouseOver(), ScrollBar::ScrollBar(), x, and y.

getScrollbarEffect()

virtual ImageEffectFilter * ScrollBar::LookAndFeelMethods::getScrollbarEffect ( )

pure virtual

Returns the component effect to use for a scrollbar.

Implemented in LookAndFeel_V1, and LookAndFeel_V2.

getMinimumScrollbarThumbSize()

virtual int ScrollBar::LookAndFeelMethods::getMinimumScrollbarThumbSize ( ScrollBar & )

pure virtual

Returns the minimum length in pixels to use for a scrollbar thumb.

Implemented in LookAndFeel_V2.

References ScrollBar::ScrollBar().

getDefaultScrollbarWidth()

virtual int ScrollBar::LookAndFeelMethods::getDefaultScrollbarWidth ( )

pure virtual

Returns the default thickness to use for a scrollbar.

Implemented in LookAndFeel_V2, and LookAndFeel_V4.

getScrollbarButtonSize()

virtual int ScrollBar::LookAndFeelMethods::getScrollbarButtonSize ( ScrollBar & )

pure virtual

Returns the length in pixels to use for a scrollbar button.

Implemented in LookAndFeel_V2.

References ScrollBar::ScrollBar().