public void setSize(int width, int height) {
rootElement.getStyle().setWidth(width, Unit.PX);
rootElement.getStyle().setHeight(height, Unit.PX);
canvas.setWidth(scale().scaledCeil(width));
canvas.setHeight(scale().scaledCeil(height));
canvas.getStyle().setWidth(width, Style.Unit.PX);
canvas.getStyle().setHeight(height, Style.Unit.PX);
viewportChanged(scale(), canvas.getWidth(), canvas.getHeight());
}
public void redraw() {
Context2d graphics2d = canvas.getContext2d();
int w = canvas.getCoordinateSpaceWidth(), h = canvas.getCoordinateSpaceHeight();
graphics2d.setFillStyle(background);
graphics2d.fillRect(0, 0, w, h);
if (pageInfo == null) return;
int subsample = toSubsample(zoom);
double scale = zoom / toZoom(subsample);
graphics2d.save();
int startX = w / 2 - centerX, startY = h / 2 - centerY;
graphics2d.translate(startX, startY);
graphics2d.scale(scale, scale);
graphics2d.translate(-startX, -startY);
graphics2d.scale(1, -1); // DjVu images have y-axis inverted
int tileSize = tileCache.tileSize;
int pw = (int) (pageInfo.width * zoom), ph = (int) (pageInfo.height * zoom);
range.xmin = (int) (Math.max(0, centerX - w * 0.5) / tileSize / scale);
range.xmax = (int) Math.ceil(Math.min(pw, centerX + w * 0.5) / tileSize / scale);
range.ymin = (int) (Math.max(0, centerY - h * 0.5) / tileSize / scale);
range.ymax = (int) Math.ceil(Math.min(ph, centerY + h * 0.5) / tileSize / scale);
imagesArray = tileCache.getTileImages(page, subsample, range, imagesArray);
for (int y = range.ymin; y <= range.ymax; y++)
for (int x = range.xmin; x <= range.xmax; x++) {
CanvasElement canvasElement = imagesArray[y - range.ymin][x - range.xmin];
graphics2d.drawImage(
canvasElement,
startX + x * tileSize,
-startY - y * tileSize - canvasElement.getHeight());
}
graphics2d.restore();
// missing tile graphics may exceed the page boundary
graphics2d.fillRect(startX + pw, 0, w, h);
graphics2d.fillRect(0, startY + ph, w, h);
}
@Override
public int getHeight() {
return canvas.getHeight();
}
