Class browser.WRImageItem

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Class browser.WRImageItem

java.lang.Object
   |
   +----browser.Observable
           |
           +----awt.DisplayItem
                   |
                   +----awt.ImageDisplayItem
                           |
                           +----browser.WRImageItem

public class WRImageItem
extends ImageDisplayItem
implements Alignable, Observer

Class WRImageItem is the display item for all images that appear in HotJava documents. It handles alignment queries, delayed image loading, image caching and following hypertext links if the image is part of an anchor. Instances of this class are observers of instances of ImageHandle. That way this display item will get notified when the ImageHandle finishes reading an image across the net.

Version:: 1.51, 20 Mar 1995
Author:: Jonathan Payne, Chris Warth

anchorUrl
borderThickness
imageUrl
imgTag
ismap
paintImage
tagHeight
tagWidth

WRImageItem(WRWindow, TagRef, String): Creates a new WRImageItem in the specified WRWindow.

checkImage(Window)
convertAlign(String)
deactivate()
executeClick(Event)
getAlign(): Get alignment for formatting.
getImageUrl(URL, WRWindow, TagRef)
initializeBorderThickness()
kickImage(WRWindow, ImgTagRef)
paint(Window, int, int)
resizeFromImage(Image)
resizeFromImageSize(int, int)
setAnchor(String)
setColor(Color)
setImage(Image)
trackEnter(Event)
trackExit(Event)
trackMotion(Event)
trackStart(Event)
trackStop(Event)
update(Window, int, int): Update is called when the mouse is clicked over an image.
update(Observable)
waitForImage()
waitForImageSize()

paintImage

  protected boolean paintImage

imgTag

  protected TagRef imgTag

imageUrl

  protected URL imageUrl

anchorUrl

  protected URL anchorUrl

ismap

  protected boolean ismap

borderThickness

  protected byte borderThickness

tagWidth

  protected int tagWidth

tagHeight

  protected int tagHeight

WRImageItem

  public WRImageItem(WRWindow w,
                     TagRef imgTag,
                     String href)

Creates a new WRImageItem in the specified WRWindow. The image source is retrieved from the specified TagRef which must contain a "src" attribute. If this image contains a reference to another URL, then that is specified by the href argument.

convertAlign

  public static int convertAlign(String align)

checkImage

  public void checkImage(Window w)

getImageUrl

  public static URL getImageUrl(URL context,
                                WRWindow w,
                                TagRef ref)

kickImage

  public static void kickImage(WRWindow w,
                               ImgTagRef ref)

setAnchor

  public void setAnchor(String href)

getAlign

  public int getAlign()

Get alignment for formatting.

initializeBorderThickness

  protected void initializeBorderThickness()

resizeFromImage

  public void resizeFromImage(Image img)

resizeFromImageSize

  public void resizeFromImageSize(int w,
                                  int h)

paint

  public synchronized void paint(Window w,
                                 int x,
                                 int y)

update

  public synchronized void update(Window w,
                                  int x,
                                  int y)

Update is called when the mouse is clicked over an image. When that occurs, we just repaint the border, if we have one.

Overrides:: update in class DisplayItem

trackEnter

  public void trackEnter(Event e)

trackMotion

  public void trackMotion(Event e)

trackExit

  public void trackExit(Event e)

setColor

  public void setColor(Color c)

trackStart

  public void trackStart(Event e)

trackStop

  public void trackStop(Event e)

executeClick

  protected void executeClick(Event e)

update

  public synchronized void update(Observable o)

deactivate

  public void deactivate()

waitForImageSize

  public synchronized void waitForImageSize()

waitForImage

  public synchronized void waitForImage()

setImage

  public synchronized void setImage(Image i)

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