gnu.java.awt.peer.qt

Class QtImage


public class QtImage
extends Image

QtImage - wraps a QImage

Field Summary

Fields inherited from class java.awt.Image

SCALE_AREA_AVERAGING, SCALE_DEFAULT, SCALE_FAST, SCALE_REPLICATE, SCALE_SMOOTH, UndefinedProperty

Constructor Summary

QtImage(byte[] data)
Constructs a QtImage from a byte array of an image file.
QtImage(int width, int height)
Constructs an empty QtImage.
QtImage(ImageProducer producer)
Creates the image from an ImageProducer.
QtImage(String filename)
Constructs a QtImage by loading a given file.
QtImage(URL url)
Creates the image from a URL.

Method Summary

int
checkImage(ImageObserver observer)
Returns the image status, used by QtToolkit
void
clear()
Clears the image to RGBA 0
void
copyArea(int x, int y, int width, int height, int dx, int dy)
void
dispose()
boolean
drawImage(QtGraphics g, QMatrix matrix, ImageObserver observer)
Draws an image with eventual scaling/transforming.
boolean
drawImage(QtGraphics g, int dx1, int dy1, int dx2, int dy2, int sx1, int sy1, int sx2, int sy2, Color bgcolor, ImageObserver observer)
Draws an image with eventual scaling/transforming.
boolean
drawImage(QtGraphics g, int x, int y, int width, int height, Color bgcolor, ImageObserver observer)
Draws an image to the QtGraphics context, at (x,y) scaled to width and height, with optional compositing with a background color.
boolean
drawImage(QtGraphics g, int x, int y, Color bgcolor, ImageObserver observer)
Draws an image to the QtGraphics context, at (x,y) with optional compositing with a background color.
void
finalize()
void
flush()
If the image is loaded and comes from an ImageProducer, regenerate the image from there.
Graphics
getGraphics()
Creates a Graphics context for this image.
int
getHeight(ImageObserver observer)
Object
getProperty(String name, ImageObserver observer)
Image
getScaledInstance(int width, int height, int hints)
Returns a scaled instance of this image.
ImageProducer
getSource()
Returns the source of this image.
int
getWidth(ImageObserver observer)
void
setImage(int width, int height, int[] pixels, Hashtable properties)
Callback from the image consumer.
String
toString()

Methods inherited from class java.awt.Image

flush, getGraphics, getHeight, getProperty, getScaledInstance, getSource, getWidth

Methods inherited from class java.lang.Object

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

Constructor Details

QtImage

public QtImage(byte[] data)
Constructs a QtImage from a byte array of an image file.
Throws:
IllegalArgumentException - if the image could not be loaded.

QtImage

public QtImage(int width,
               int height)
Constructs an empty QtImage.

QtImage

public QtImage(ImageProducer producer)
Creates the image from an ImageProducer. May result in an error image.

QtImage

public QtImage(String filename)
Constructs a QtImage by loading a given file.
Throws:
IllegalArgumentException - if the image could not be loaded.

QtImage

public QtImage(URL url)
Creates the image from a URL. May result in an error image.

Method Details

checkImage

public int checkImage(ImageObserver observer)
Returns the image status, used by QtToolkit

clear

public void clear()
Clears the image to RGBA 0

copyArea

public void copyArea(int x,
                     int y,
                     int width,
                     int height,
                     int dx,
                     int dy)

dispose

public void dispose()

drawImage

public boolean drawImage(QtGraphics g,
                         QMatrix matrix,
                         ImageObserver observer)
Draws an image with eventual scaling/transforming.

drawImage

public boolean drawImage(QtGraphics g,
                         int dx1,
                         int dy1,
                         int dx2,
                         int dy2,
                         int sx1,
                         int sy1,
                         int sx2,
                         int sy2,
                         Color bgcolor,
                         ImageObserver observer)
Draws an image with eventual scaling/transforming.

drawImage

public boolean drawImage(QtGraphics g,
                         int x,
                         int y,
                         int width,
                         int height,
                         Color bgcolor,
                         ImageObserver observer)
Draws an image to the QtGraphics context, at (x,y) scaled to width and height, with optional compositing with a background color.

drawImage

public boolean drawImage(QtGraphics g,
                         int x,
                         int y,
                         Color bgcolor,
                         ImageObserver observer)
Draws an image to the QtGraphics context, at (x,y) with optional compositing with a background color.

finalize

public void finalize()
Overrides:
finalize in interface Object

flush

public void flush()
If the image is loaded and comes from an ImageProducer, regenerate the image from there. I have no idea if this is ever actually used. Since QtImage can't be instantiated directly, how is the user to know if it was created from an ImageProducer or not?
Overrides:
flush in interface Image

getGraphics

public Graphics getGraphics()
Creates a Graphics context for this image.
Overrides:
getGraphics in interface Image

getHeight

public int getHeight(ImageObserver observer)
Overrides:
getHeight in interface Image

getProperty

public Object getProperty(String name,
                          ImageObserver observer)
Overrides:
getProperty in interface Image

getScaledInstance

public Image getScaledInstance(int width,
                               int height,
                               int hints)
Returns a scaled instance of this image.
Overrides:
getScaledInstance in interface Image

getSource

public ImageProducer getSource()
Returns the source of this image.
Overrides:
getSource in interface Image

getWidth

public int getWidth(ImageObserver observer)
Overrides:
getWidth in interface Image

setImage

public void setImage(int width,
                     int height,
                     int[] pixels,
                     Hashtable properties)
Callback from the image consumer.

toString

public String toString()
Overrides:
toString in interface Object

QtImage.java -- Copyright (C) 2005 Free Software Foundation, Inc. This file is part of GNU Classpath. GNU Classpath is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GNU Classpath is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GNU Classpath; see the file COPYING. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. Linking this library statically or dynamically with other modules is making a combined work based on this library. Thus, the terms and conditions of the GNU General Public License cover the whole combination. As a special exception, the copyright holders of this library give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you may extend this exception to your version of the library, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version.