/** Draws this handle. */
public void draw(Graphics2D g) {
Graphics2D gg = (Graphics2D) g.create();
gg.transform(view.getDrawingToViewTransform());
for (Connector c : connectors) {
c.draw(gg);
}
gg.dispose();
drawCircle(g, (getTarget() == null) ? Color.red : Color.green, Color.black);
}
/** Finds a new connectableConnector of the connection. */
public void trackStep(Point anchor, Point lead, int modifiersEx) {
Point2D.Double p = view.viewToDrawing(lead);
view.getConstrainer().constrainPoint(p);
connectableFigure = findConnectableFigure(p, view.getDrawing());
if (connectableFigure != null) {
Connector aTarget = findConnectionTarget(p, view.getDrawing());
if (aTarget != null) {
p = aTarget.getAnchor();
}
}
getOwner().willChange();
setLocation(p);
getOwner().changed();
repaintConnectors();
}
/**
* Updates the list of connectors that we draw when the user moves or drags the mouse over a
* figure to which can connect.
*/
public void repaintConnectors() {
Rectangle2D.Double invalidArea = null;
for (Connector c : connectors) {
if (invalidArea == null) {
invalidArea = c.getDrawingArea();
} else {
invalidArea.add(c.getDrawingArea());
}
}
connectors =
(connectableFigure == null)
? new java.util.LinkedList<Connector>()
: connectableFigure.getConnectors(getOwner());
for (Connector c : connectors) {
if (invalidArea == null) {
invalidArea = c.getDrawingArea();
} else {
invalidArea.add(c.getDrawingArea());
}
}
if (invalidArea != null) {
view.getComponent().repaint(view.drawingToView(invalidArea));
}
}