Class VolatileImageBackgroundPainterStrategy

java.lang.Object

org.fife.ui.rtextarea.ImageBackgroundPainterStrategy

org.fife.ui.rtextarea.VolatileImageBackgroundPainterStrategy

All Implemented Interfaces:

BackgroundPainterStrategy

public class VolatileImageBackgroundPainterStrategy
extends ImageBackgroundPainterStrategy

A strategy for painting the background of an RTextAreaBase as an image. The image is always stretched to completely fill the RTextAreaBase.

A java.awt.image.VolatileImage is used for rendering; theoretically, this should be the best image format for performance.

You can set the scaling hint used when stretching/skewing the image to fit in the RTextAreaBase's background via the setScalingHint method, but keep in mind the more accurate the scaling hint, the less responsive your application will be when stretching the window (as that's the only time the image's size is recalculated).

Version:

0.1

Author:

Robert Futrell

See Also:

• ImageBackgroundPainterStrategy
• BufferedImageBackgroundPainterStrategy

Field Summary

Fields inherited from class ImageBackgroundPainterStrategy

tracker

Constructor Summary

Constructors

Constructor	Description
VolatileImageBackgroundPainterStrategy(RTextAreaBase ta)	Constructor.

Method Summary

Modifier and Type	Method	Description
protected void	paintImage(Graphics g, int x, int y)	Paints the image at the specified location.
protected void	rescaleImage(int width, int height, int hint)	Rescales the displayed image to be the specified size.

Methods inherited from class ImageBackgroundPainterStrategy

getMasterImage, getRTextAreaBase, getScalingHint, paint, setImage, setImage, setScalingHint

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

VolatileImageBackgroundPainterStrategy

public VolatileImageBackgroundPainterStrategy(RTextAreaBase ta)

Constructor.

Parameters:

ta - The text area whose background we'll be painting.

Method Details

paintImage

protected void paintImage(Graphics g,
 int x,
 int y)

Paints the image at the specified location. This method assumes scaling has already been done, and simply paints the background image "as-is."

Specified by:

paintImage in class ImageBackgroundPainterStrategy

Parameters:

g - The graphics context.

x - The x-coordinate at which to paint.

y - The y-coordinate at which to paint.

rescaleImage

protected void rescaleImage(int width,
 int height,
 int hint)

Rescales the displayed image to be the specified size.

Specified by:

rescaleImage in class ImageBackgroundPainterStrategy

Parameters:

width - The new width of the image.

height - The new height of the image.

hint - The scaling hint to use.