Package com.intellij.util.ui

Class RegionPainter.Image

java.lang.Object

com.intellij.util.ui.RegionPainter.Image

All Implemented Interfaces:

RegionPainter<java.lang.Object>

Direct Known Subclasses:

ErrorStripePainter

Enclosing interface:

RegionPainter<T>

public static class RegionPainter.Image
extends java.lang.Object
implements RegionPainter<java.lang.Object>

This class provides a caching functionality for a region painter.

Nested Class Summary

Nested classes/interfaces inherited from interface com.intellij.util.ui.RegionPainter

RegionPainter.Alpha, RegionPainter.Image

Constructor Summary

Constructors

Constructor and Description
Image()

Method Summary

Modifier and Type	Method and Description
protected java.awt.image.BufferedImage	createImage(int width, int height) This method is called if the cached image is invalidated or it's size is changed.
protected void	invalidate() This method is called to invalidate the cached image.
void	paint(java.awt.Graphics2D g, int x, int y, int width, int height, java.lang.Object object) Renders to the given Graphics2D object.
protected void	updateImage(java.awt.image.BufferedImage image) This method is called for the cached image before drawImage.

Methods inherited from class java.lang.Object

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

Constructor Detail

Image

public Image()

Method Detail

updateImage

protected void updateImage(java.awt.image.BufferedImage image)

This method is called for the cached image before drawImage. It should be overridden if the image must be updated without creating a new image.

Parameters:

image - the cached image to update

createImage

protected java.awt.image.BufferedImage createImage(int width,
                                                   int height)

This method is called if the cached image is invalidated or it's size is changed. It must be overridden to paint on newly created image.

Parameters:

width - width of the new image

height - height of the new image

Returns:

new BufferedImage object

invalidate

protected void invalidate()

This method is called to invalidate the cached image.

paint

public void paint(java.awt.Graphics2D g,
                  int x,
                  int y,
                  int width,
                  int height,
                  java.lang.Object object)

Description copied from interface: RegionPainter

Renders to the given Graphics2D object.

Specified by:

paint in interface RegionPainter<java.lang.Object>

Parameters:

g - the Graphics2D object to render to

x - X position of the area to paint

y - Y position of the area to paint

width - width of the area to paint

height - height of the area to paint

object - an optional configuration parameter