public static Point getCenterOf(final Component aContainer, final JComponent content) {
final JComponent component = getTargetComponent(aContainer);
Point containerScreenPoint = component.getVisibleRect().getLocation();
SwingUtilities.convertPointToScreen(containerScreenPoint, aContainer);
return UIUtil.getCenterPoint(
new Rectangle(containerScreenPoint, component.getVisibleRect().getSize()),
content.getPreferredSize());
}
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 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);
}
}
/**
* @param aEvent
* @param aStartPoint
*/
protected void handleZoomRegion(final MouseEvent aEvent, final Point aStartPoint) {
// For now, disabled by default as it isn't 100% working yet...
if (Boolean.FALSE.equals(Boolean.valueOf(System.getProperty("zoomregionenabled", "false")))) {
return;
}
final JComponent source = (JComponent) aEvent.getComponent();
final boolean dragging = (aEvent.getID() == MouseEvent.MOUSE_DRAGGED);
final GhostGlassPane glassPane =
(GhostGlassPane) SwingUtilities.getRootPane(source).getGlassPane();
Rectangle viewRect;
final JScrollPane scrollPane =
SwingComponentUtils.getAncestorOfClass(JScrollPane.class, source);
if (scrollPane != null) {
final JViewport viewport = scrollPane.getViewport();
viewRect = SwingUtilities.convertRectangle(viewport, viewport.getVisibleRect(), glassPane);
} else {
viewRect = SwingUtilities.convertRectangle(source, source.getVisibleRect(), glassPane);
}
final Point start = SwingUtilities.convertPoint(source, aStartPoint, glassPane);
final Point current = SwingUtilities.convertPoint(source, aEvent.getPoint(), glassPane);
if (dragging) {
if (!glassPane.isVisible()) {
glassPane.setVisible(true);
glassPane.setRenderer(new RubberBandRenderer(), start, current, viewRect);
} else {
glassPane.updateRenderer(start, current, viewRect);
}
glassPane.repaintPartially();
} else
/* if ( !dragging ) */
{
// Fire off a signal to the zoom controller to do its job...
this.controller.getZoomController().zoomRegion(aStartPoint, aEvent.getPoint());
glassPane.setVisible(false);
}
}