Class GtkImage

public GtkImage()

Constructs a blank GtkImage. This is called when GtkToolkit.createImage (String) is called with an empty string argument (""). A blank image is loaded immediately upon construction and has width -1 and height -1.

public GtkImage(byte[] data)

Constructs a GtkImage from a byte array of an image file.

Throws:

IllegalArgumentException - if the image could not be loaded.

public GtkImage(ImageProducer producer)

Constructs a GtkImage from an ImageProducer. Asynchronity is handled in the following manner: A GtkImageConsumer gets the image data, and calls setImage() when completely finished. The GtkImage is not considered loaded until the GtkImageConsumer is completely finished. We go for all "all or nothing".

public GtkImage(String filename)

Constructs a GtkImage by loading a given file.

Throws:

IllegalArgumentException - if the image could not be loaded.

public GtkImage(URL url)

Constructs a GtkImage from a URL. May result in an error image.

public int checkImage(ImageObserver observer)

Returns the image status, used by GtkToolkit

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 GtkImage 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()

Does nothing. Should not be called.

Overrides:

getGraphics in interface Image

public int getHeight(ImageObserver observer)

Overrides:

getHeight in interface Image

public Object getProperty(String name,
                          ImageObserver observer)

Overrides:

getProperty in interface Image

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

Returns a scaled instance of this pixbuf.

Overrides:

getScaledInstance in interface Image

public ImageProducer getSource()

Returns the source of this image.

Overrides:

getSource in interface Image

public int getWidth(ImageObserver observer)

Overrides:

getWidth in interface Image

public void setImage(int width,
                     int height,
                     int[] pixels,
                     Hashtable properties)

Callback from the image consumer.