com.fr.design.gui.syntax.ui.rtextarea

类 ImageBackgroundPainterStrategy

java.lang.Object

com.fr.design.gui.syntax.ui.rtextarea.ImageBackgroundPainterStrategy

所有已实现的接口:

BackgroundPainterStrategy

直接已知子类:

BufferedImageBackgroundPainterStrategy, VolatileImageBackgroundPainterStrategy

public abstract class ImageBackgroundPainterStrategy
extends java.lang.Object
implements BackgroundPainterStrategy

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

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).

版本:

0.1

作者:

Robert Futrell

另请参阅:

BufferedImageBackgroundPainterStrategy, VolatileImageBackgroundPainterStrategy

字段概要

字段

限定符和类型	字段和说明
protected java.awt.MediaTracker	tracker

构造器概要

构造器

构造器和说明
ImageBackgroundPainterStrategy(com.fr.design.gui.syntax.ui.rtextarea.RTextAreaBase textArea) Constructor.

方法概要

方法

限定符和类型	方法和说明
java.awt.Image	getMasterImage() Returns the "master" image; that is, the original, unscaled image.
com.fr.design.gui.syntax.ui.rtextarea.RTextAreaBase	getRTextAreaBase() Returns the text area using this strategy.
int	getScalingHint() Returns the scaling hint being used.
void	paint(java.awt.Graphics g, java.awt.Rectangle bounds) Paints the image at the specified location and at the specified size.
protected abstract void	paintImage(java.awt.Graphics g, int x, int y) Paints the image at the specified location.
protected abstract void	rescaleImage(int width, int height, int hint) Rescales the displayed image to be the specified size.
void	setImage(java.awt.Image image) Sets the image this background painter displays.
void	setImage(java.net.URL imageURL) Sets the image this background painter displays.
void	setScalingHint(int hint) Sets the scaling hint to use when scaling the image.

从类继承的方法 java.lang.Object

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

字段详细资料

tracker

protected java.awt.MediaTracker tracker

构造器详细资料

ImageBackgroundPainterStrategy

public ImageBackgroundPainterStrategy(com.fr.design.gui.syntax.ui.rtextarea.RTextAreaBase textArea)

Constructor.

参数:

textArea - The text area using this image as its background.

方法详细资料

getRTextAreaBase

public com.fr.design.gui.syntax.ui.rtextarea.RTextAreaBase getRTextAreaBase()

Returns the text area using this strategy.

返回:

The text area.

getMasterImage

public java.awt.Image getMasterImage()

Returns the "master" image; that is, the original, unscaled image. When the image needs to be rescaled, scaling should be done from this image, to prevent repeated scaling from distorting the image.

返回:

The master image.

getScalingHint

public int getScalingHint()

Returns the scaling hint being used.

返回:

The scaling hint to use when scaling an image.

另请参阅:

setScalingHint(int)

paint

public final void paint(java.awt.Graphics g,
         java.awt.Rectangle bounds)

Paints the image at the specified location and at the specified size.

指定者:

paint 在接口中 BackgroundPainterStrategy

参数:

g - The graphics context.

bounds - The bounds in which to paint the image. The image will be scaled to fit exactly in these bounds if necessary.

paintImage

protected abstract void paintImage(java.awt.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."

参数:

g - The graphics context.

x - The x-coordinate at which to paint.

y - The y-coordinate at which to paint.

rescaleImage

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

Rescales the displayed image to be the specified size.

参数:

width - The new width of the image.

height - The new height of the image.

hint - The scaling hint to use.

setImage

public void setImage(java.net.URL imageURL)

Sets the image this background painter displays.

参数:

imageURL - URL of a file containing the image to display.

setImage

public void setImage(java.awt.Image image)

Sets the image this background painter displays.

参数:

image - The new image to use for the background.

setScalingHint

public void setScalingHint(int hint)

Sets the scaling hint to use when scaling the image.

参数:

hint - The hint to apply; e.g. Image.SCALE_DEFAULT.

另请参阅:

getScalingHint()