Class 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.

public QtImage(int width,
               int height)

Constructs an empty QtImage.

public QtImage(ImageProducer producer)

Creates the image from an ImageProducer. May result in an error image.

public QtImage(String filename)

Constructs a QtImage by loading a given file.

Throws:

IllegalArgumentException - if the image could not be loaded.

public QtImage(URL url)

Creates the image from a URL. May result in an error image.

public int checkImage(ImageObserver observer)

Returns the image status, used by QtToolkit

public void clear()

Clears the image to RGBA 0

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

public void dispose()

public boolean drawImage(QtGraphics g,
                         QMatrix matrix,
                         ImageObserver observer)

Draws an image with eventual scaling/transforming.

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.

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.

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.

public void finalize()

Called on an object by the Virtual Machine at most once, at some point after the Object is determined unreachable but before it is destroyed. You would think that this means it eventually is called on every Object, but this is not necessarily the case. If execution terminates abnormally, garbage collection does not always happen. Thus you cannot rely on this method to always work. For finer control over garbage collection, use references from the java.lang.ref package.

Virtual Machines are free to not call this method if they can determine that it does nothing important; for example, if your class extends Object and overrides finalize to do simply super.finalize().

finalize() will be called by a Thread that has no locks on any Objects, and may be called concurrently. There are no guarantees on the order in which multiple objects are finalized. This means that finalize() is usually unsuited for performing actions that must be thread-safe, and that your implementation must be use defensive programming if it is to always work.

If an Exception is thrown from finalize() during garbage collection, it will be patently ignored and the Object will still be destroyed.

It is allowed, although not typical, for user code to call finalize() directly. User invocation does not affect whether automatic invocation will occur. It is also permitted, although not recommended, for a finalize() method to "revive" an object by making it reachable from normal code again.

Unlike constructors, finalize() does not get called for an object's superclass unless the implementation specifically calls super.finalize().

The default implementation does nothing.

Overrides:

finalize in interface Object

See Also:

System.gc(), System.runFinalizersOnExit(boolean), java.lang.ref

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

public Graphics getGraphics()

Creates a Graphics context for this image.

Overrides:

getGraphics in interface Image

public int getHeight(ImageObserver observer)

Returns the height of the image, or -1 if it is unknown. If the image height is unknown, the observer object will be notified when the value is known.

Overrides:

getHeight in interface Image

Parameters:

observer - the image observer for this object

Returns:

the height in pixels

See Also:

Image.getWidth(ImageObserver)

public Object getProperty(String name,
                          ImageObserver observer)

This method requests a named property for an object. The value of the property is returned. The value UndefinedProperty is returned if there is no property with the specified name. The value null is returned if the properties for the object are not yet known. In this case, the specified image observer is notified when the properties are known.

Overrides:

getProperty in interface Image

Parameters:

name - the requested property name

observer - the image observer for this object

Returns:

the named property, if available

See Also:

Image.UndefinedProperty

public Image getScaledInstance(int width,
                               int height,
                               int hints)

Returns a scaled instance of this image.

Overrides:

getScaledInstance in interface Image

public ImageProducer getSource()

Returns the source of this image.

Overrides:

getSource in interface Image

public int getWidth(ImageObserver observer)

Returns the width of the image, or -1 if it is unknown. If the image width is unknown, the observer object will be notified when the value is known.

Overrides:

getWidth in interface Image

Parameters:

observer - the image observer for this object

Returns:

the width in pixels

See Also:

Image.getHeight(ImageObserver)

public void setImage(int width,
                     int height,
                     int[] pixels,
                     Hashtable<K,V> properties)

Callback from the image consumer.

public String toString()

Convert this Object to a human-readable String. There are no limits placed on how long this String should be or what it should contain. We suggest you make it as intuitive as possible to be able to place it into System.out.println() and such.

It is typical, but not required, to ensure that this method never completes abruptly with a RuntimeException.

This method will be called when performing string concatenation with this object. If the result is null, string concatenation will instead use "null".

The default implementation returns getClass().getName() + "@" + Integer.toHexString(hashCode()).

Overrides:

toString in interface Object

Returns:

the String representing this Object, which may be null

See Also:

getClass(), Object.hashCode(), Class.getName(), Integer.toHexString(int)