private void moveVisibleRect(Point center) {
JComponent component = scene.getView();
if (component == null) {
return;
}
double zoomFactor = scene.getZoomFactor();
Rectangle bounds = scene.getBounds();
Dimension size = getSize();
double sx = bounds.width > 0 ? (double) size.width / bounds.width : 0.0;
double sy = bounds.width > 0 ? (double) size.height / bounds.height : 0.0;
double scale = Math.min(sx, sy);
int vw = (int) (scale * bounds.width);
int vh = (int) (scale * bounds.height);
int vx = (size.width - vw) / 2;
int vy = (size.height - vh) / 2;
int cx = (int) ((double) (center.x - vx) / scale * zoomFactor);
int cy = (int) ((double) (center.y - vy) / scale * zoomFactor);
Rectangle visibleRect = component.getVisibleRect();
visibleRect.x = cx - visibleRect.width / 2;
visibleRect.y = cy - visibleRect.height / 2;
component.scrollRectToVisible(visibleRect);
this.repaint();
}
public void addNotify() {
super.addNotify();
scene.addSceneListener(this);
JComponent viewComponent = scene.getView();
if (viewComponent == null) {
viewComponent = scene.createView();
}
viewComponent.addComponentListener(this);
repaint();
}
public void paint(Graphics g) {
Graphics2D gr = (Graphics2D) g;
super.paint(g);
Rectangle bounds = scene.getBounds();
Dimension size = getSize();
double sx = bounds.width > 0 ? (double) size.width / bounds.width : 0.0;
double sy = bounds.width > 0 ? (double) size.height / bounds.height : 0.0;
double scale = Math.min(sx, sy);
int vw = (int) (scale * bounds.width);
int vh = (int) (scale * bounds.height);
int vx = (size.width - vw) / 2;
int vy = (size.height - vh) / 2;
if (image == null || vw != imageWidth || vh != imageHeight) {
imageWidth = vw;
imageHeight = vh;
image = this.createImage(imageWidth, imageHeight);
Graphics2D ig = (Graphics2D) image.getGraphics();
ig.scale(scale, scale);
scene.setRealZoomFactor(scale);
scene.paint(ig);
scene.setRealZoomFactor(0.0);
}
gr.drawImage(image, vx, vy, this);
JComponent component = scene.getView();
double zoomFactor = scene.getZoomFactor();
Rectangle viewRectangle = component != null ? component.getVisibleRect() : null;
if (viewRectangle != null) {
Rectangle window =
new Rectangle(
(int) ((double) viewRectangle.x * scale / zoomFactor),
(int) ((double) viewRectangle.y * scale / zoomFactor),
(int) ((double) viewRectangle.width * scale / zoomFactor),
(int) ((double) viewRectangle.height * scale / zoomFactor));
window.translate(vx, vy);
gr.setColor(new Color(200, 200, 200, 128));
gr.fill(window);
gr.setColor(Color.BLACK);
gr.drawRect(window.x, window.y, window.width - 1, window.height - 1);
}
}
public void removeNotify() {
scene.getView().removeComponentListener(this);
scene.removeSceneListener(this);
super.removeNotify();
}