private void updateIcon() {
// As we are probably in the animation frame we make this call non blocking by either setting
// the icon
// immediately if it is already loaded and present in cache, or deferring the icon load in the
// background
String url = getNode().getImageUrl();
int fitWidth = getNode().getFitWidth().intValue();
int fitHeight = getNode().getFitHeight().intValue();
Icon cachedIcon = SwingImageStore.getIconFromCache(url, fitWidth, fitHeight);
if (cachedIcon != null || url == null)
swingImage.setIcon(cachedIcon); // Setting the image immediately
else { // Deferring the image load in the background because it can take more than 16ms
// (breaking 60 FPS)
UiScheduler uiScheduler = Toolkit.get().scheduler();
uiScheduler.runInBackground(
() -> {
// Loading the image
Icon icon = SwingImageStore.getIcon(url, fitWidth, fitHeight);
// Now that we have the image, we update the JavaFx node (in the UI thread)
uiScheduler.runInUiThread(() -> swingImage.setIcon(icon));
// In case the icon is in a table cell, the above call didn't update the UI so we
// request a UI refresh
uiScheduler.requestNextPulse();
});
}
}
@Override
public void paint(Graphics2D g) {
Icon icon = swingImage.getIcon();
if (icon != null) {
ImageView node = getNode();
swingImage.setBounds(
node.getX().intValue(),
node.getY().intValue(),
icon.getIconWidth(),
icon.getIconHeight());
swingImage.paint(g);
}
}
public SwingImageViewViewer() {
super(new ImageViewViewerBase());
swingImage.setBackground(null); // transparent background
}
@Override
public double prefHeight(double width) {
Icon icon = swingImage.getIcon();
return icon == null ? getNode().getFitHeight() : icon.getIconHeight();
}
@Override
public double prefWidth(double height) {
Icon icon = swingImage.getIcon();
return icon == null ? getNode().getFitWidth() : icon.getIconWidth();
}