/**
* Place a picture in the display area. Places the picture at a random location on screen.
*
* @param picture The picture to place on screen.
* @param add If <code>true</code>, the picture is added to the history.
*/
protected void place(final Picture picture, final boolean add) {
Point p;
if (Picture.ORIGIN == picture.getOrigin()) {
// never been placed before
p = random(picture.getURL().toExternalForm(), picture.width, picture.height);
picture.x = p.x;
picture.y = p.y;
picture.setOrigin(p);
}
mThumbelina.getPicturePanel().draw(picture, add);
}
/**
* Find a picture with the given URL in the panel. This should really only be used to discover if
* the picture is still visible. There could be more than one picture with the given URL because
* it may be partially obscured by another picture, in which case the pieces are each given their
* own picture object, but all point at the same <code>URL</code> and <code>Image</code>.
*
* @param url The url to locate.
* @return The first picture encountered in the panel, or null if the picture was not found.
*/
public Picture find(final String url) {
Enumeration enumeration;
Picture picture;
Picture ret;
ret = null;
enumeration = mMosaic.getPictures();
while ((null == ret) && enumeration.hasMoreElements()) {
picture = (Picture) enumeration.nextElement();
if (url.equals(picture.getURL().toExternalForm())) ret = picture;
}
return (ret);
}
/**
* Add an image to the panel.
*
* @param image The image to add.
* @param url The url the image came from.
* @param background If <code>true</code>, just add to pending list.
*/
public void add(final Image image, final URL url, final boolean background) {
Picture picture;
int size;
picture = new Picture();
picture.setImage(image);
picture.setURL(url);
if (background)
synchronized (mPending) {
mPending.add(picture);
size = mPending.size();
if (mThumbelina.mReadyProgress.getMaximum() < size)
mThumbelina.mReadyProgress.setMaximum(size);
mThumbelina.mReadyProgress.setValue(size);
mPending.notify();
}
else place(picture, false);
}
/**
* Paints this component. Runs through the list of tiles and for every one that intersects the
* clip region performs a <code>drawImage()</code>.
*
* @param graphics The graphics context used to paint with.
*/
public void paint(final Graphics graphics) {
Rectangle clip;
Enumeration enumeration;
HashSet set; // just so we don't draw things twice
Picture picture;
Image image;
Point origin;
int width;
int height;
adjustClipForInsets(graphics);
clip = graphics.getClipBounds();
synchronized (mMosaic) {
if (0 == mMosaic.getSize()) super.paint(graphics);
else {
super.paint(graphics);
enumeration = mMosaic.getPictures();
set = new HashSet();
while (enumeration.hasMoreElements()) {
picture = (Picture) enumeration.nextElement();
if ((null == clip) || (clip.intersects(picture))) {
image = picture.getImage();
if (!set.contains(image)) {
origin = picture.getOrigin();
width = image.getWidth(this);
height = image.getHeight(this);
graphics.drawImage(
picture.getImage(),
origin.x,
origin.y,
origin.x + width,
origin.y + height,
0,
0,
width,
height,
this);
set.add(image);
}
}
}
}
}
}
/**
* Draw an image on screen.
*
* @param picture The picture to draw.
* @param add If <code>true</code>, the picture is added to the history.
*/
protected void draw(final Picture picture, final boolean add) {
Component parent;
boolean dolayout;
Dimension before;
Dimension after;
parent = getParent();
dolayout = false;
synchronized (mMosaic) {
if (parent instanceof JViewport) {
before = getPreferredSize();
mMosaic.add(picture);
after = calculatePreferredSize();
if (after.width > before.width) dolayout = true;
else after.width = before.width;
if (after.height > before.height) dolayout = true;
else after.height = before.height;
if (dolayout) mPreferredSize = after;
} else mMosaic.add(picture);
}
if (dolayout) revalidate();
repaint(picture.x, picture.y, picture.width, picture.height);
if (add) mThumbelina.addHistory(picture.getURL().toExternalForm());
}
/**
* Move the given picture to the top of the Z order. Adds it, even it if it doesn't exist. Also
* puts the URL in the url text of the status bar.
*
* @param picture The picture being brought forward.
*/
public void bringToTop(final Picture picture) {
picture.reset();
mMosaic.bringToTop(picture);
repaint(picture.x, picture.y, picture.width, picture.height);
mThumbelina.mUrlText.setText(picture.getURL().toExternalForm());
}
/**
* Construct a picture from the one given.
*
* @param picture The picture to copy.
*/
public Picture(final Picture picture) {
super(picture);
setURL(picture.getURL());
setImage(picture.getImage());
setOrigin(picture.getOrigin());
}
