* We store our image and imageBufer in DownloadManager using
* setData & getData.
*/
// Named infoObj so code can be copied easily to the other PiecesItem
DownloadManager infoObj = (DownloadManager) cell.getDataSource();
long lCompleted = (infoObj == null) ? 0 : infoObj.getStats().getCompleted();
boolean bForce = infoObj != null && infoObj.getUserData("PiecesImage") == null;
if (!cell.setSortValue(lCompleted) && cell.isValid() && !bForce) {
return;
}
if (infoObj == null)
return;
//Compute bounds ...
int newWidth = cell.getWidth();
if (newWidth <= 0)
return;
int newHeight = cell.getHeight();
int x0 = borderVerticalSize;
int x1 = newWidth - 1 - borderVerticalSize;
int y0 = completionHeight + borderHorizontalSize + borderSplit;
int y1 = newHeight - 1 - borderHorizontalSize;
int drawWidth = x1 - x0 + 1;
if (drawWidth < 10 || y1 < 3)
return;
boolean bImageBufferValid = true;
int[] imageBuffer = (int[]) infoObj.getUserData("PiecesImageBuffer");
if (imageBuffer == null || imageBuffer.length != drawWidth) {
imageBuffer = new int[drawWidth];
bImageBufferValid = false;
}
Image image = (Image) infoObj.getUserData("PiecesImage");
GC gcImage;
boolean bImageChanged;
Rectangle imageBounds;
if (image == null || image.isDisposed()) {
bImageChanged = true;
} else {
imageBounds = image.getBounds();
bImageChanged = imageBounds.width != newWidth
|| imageBounds.height != newHeight;
}
if (bImageChanged) {
if (image != null && !image.isDisposed()) {
image.dispose();
}
image = new Image(SWTThread.getInstance().getDisplay(), newWidth,
newHeight);
imageBounds = image.getBounds();
bImageBufferValid = false;
// draw border
gcImage = new GC(image);
gcImage.setForeground(Colors.grey);
if (borderHorizontalSize > 0) {
if (borderVerticalSize > 0) {
gcImage.drawRectangle(0, 0, newWidth - 1, newHeight - 1);
} else {
gcImage.drawLine(0, 0, newWidth - 1, 0);
gcImage.drawLine(0, newHeight - 1, newWidth - 1, newHeight - 1);
}
} else if (borderVerticalSize > 0) {
gcImage.drawLine(0, 0, 0, newHeight - 1);
gcImage.drawLine(newWidth - 1, 0, newWidth - 1, newHeight - 1);
}
if (borderSplit > 0) {
gcImage.setForeground(Colors.white);
gcImage.drawLine(x0, completionHeight + borderHorizontalSize, x1,
completionHeight + borderHorizontalSize);
}
} else {
gcImage = new GC(image);
}
DiskManager disk_manager = infoObj.getDiskManager();
DiskManagerPiece[] pieces = disk_manager == null ? null
: disk_manager.getPieces();
int nbPieces = infoObj.getNbPieces();
try {
int nbComplete = 0;
int a0;
int a1 = 0;
for (int i = 0; i < drawWidth; i++) {
if (i == 0) {
// always start out with one piece
a0 = 0;
a1 = nbPieces / drawWidth;
if (a1 == 0)
a1 = 1;
} else {
// the last iteration, a1 will be nbPieces
a0 = a1;
a1 = ((i + 1) * nbPieces) / (drawWidth);
}
int index;
if (a1 <= a0) {
index = imageBuffer[i - 1];
} else {
int nbAvailable = 0;
for (int j = a0; j < a1; j++)
if (pieces != null && pieces[j].isDone())
nbAvailable++;
nbComplete += nbAvailable;
index = (nbAvailable * Colors.BLUES_DARKEST) / (a1 - a0);
//System.out.println("i="+i+";nbAvailable="+nbAvailable+";nbComplete="+nbComplete+";nbPieces="+nbPieces+";a0="+a0+";a1="+a1);
}
if (!bImageBufferValid || imageBuffer[i] != index) {
imageBuffer[i] = index;
bImageChanged = true;
gcImage.setForeground(index == INDEX_COLOR_NONEAVAIL ? Colors.red
: Colors.blues[index]);
gcImage.drawLine(i + x0, y0, i + x0, y1);
}
}
// pieces can sometimes be 0 due to timing or bad torrent (well, there's a bug with a /0 error
// so it can happen somehow :)
int limit = nbPieces == 0 ? 0 : ((drawWidth * nbComplete) / nbPieces);
if (limit < drawWidth) {
gcImage.setBackground(Colors.blues[Colors.BLUES_LIGHTEST]);
gcImage.fillRectangle(limit + x0, borderHorizontalSize, x1 - limit,
completionHeight);
}
gcImage.setBackground(Colors.colorProgressBar);
gcImage.fillRectangle(x0, borderHorizontalSize, limit, completionHeight);
} catch (Exception e) {
System.out.println("Error Drawing PiecesItem");
Debug.printStackTrace(e);
}
gcImage.dispose();
Image oldImage = null;
Graphic graphic = cell.getGraphic();
if (graphic instanceof UISWTGraphic) {
oldImage = ((UISWTGraphic) graphic).getImage();
}
if (bImageChanged || image != oldImage || !cell.isValid()) {
if (cell instanceof TableCellSWT) {
((TableCellSWT) cell).setGraphic(image);
} else {
cell.setGraphic(new UISWTGraphicImpl(image));
}
if (bImageChanged) {
cell.invalidate();
}
infoObj.setUserData("PiecesImage", image);
infoObj.setUserData("PiecesImageBuffer", imageBuffer);
}
}