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| class MyMarqueeHandler extends BasicMarqueeHandler {
protected Point2D start, current;
protected PortView port, firstPort;
public boolean isForceMarqueeEvent(MouseEvent e) {
port = getSourcePortAt(e.getPoint());
if (port != null && classPanel.graph.isPortsVisible())
return true;
return super.isForceMarqueeEvent(e);
}
public void mousePressed(MouseEvent e) {
// If Right Mouse Button
if (SwingUtilities.isRightMouseButton(e)) {
// Find Cell in Model Coordinates
Object cell = classPanel.graph.getFirstCellForLocation(e.getX(), e.getY());
// Create PopupMenu for the Cell
JPopupMenu menu = createPopupMenu(e.getPoint(), cell);
// Display PopupMenu
menu.show(classPanel.graph, e.getX(), e.getY());
// Else if in ConnectMode and Remembered Port is Valid
} else if (port != null && classPanel.graph.isPortsVisible()) {
// Remember Start Location
start = classPanel.graph.toScreen(port.getLocation());
// Remember First Port
firstPort = port;
} else {
// Call Superclass
super.mousePressed(e);
}
}
public void mouseDragged(MouseEvent e) {
if (start != null) {
Graphics g = classPanel.graph.getGraphics();
PortView newPort = getTargetPortAt(e.getPoint());
if (newPort == null || newPort != port) {
paintConnector(Color.black, classPanel.graph.getBackground(), g);
port = newPort;
if (port != null)
current = classPanel.graph.toScreen(port.getLocation());
else
current = classPanel.graph.snap(e.getPoint());
paintConnector(classPanel.graph.getBackground(), Color.black, g);
}
}
super.mouseDragged(e);
}
public void mouseReleased(MouseEvent e) {
if (e != null && port != null && firstPort != null && firstPort != port) {
DefaultEdge myEdge = new DefaultEdge();
int arrow = GraphConstants.ARROW_CLASSIC;
GraphConstants.setLineEnd(myEdge.getAttributes(), arrow);
GraphConstants.setEndFill(myEdge.getAttributes(), true);
classPanel.graph.getGraphLayoutCache().insertEdge(myEdge,
(DefaultPort)firstPort.getCell(), (DefaultPort)port.getCell());
e.consume();
} else {
classPanel.graph.repaint();
}
firstPort = port = null;
start = current = null;
super.mouseReleased(e);
}
public void mouseMoved(MouseEvent e) {
// Check Mode and Find Port
if (e != null && getSourcePortAt(e.getPoint()) != null
&& classPanel.graph.isPortsVisible()) {
// Set Cusor on Graph (Automatically Reset)
classPanel.graph.setCursor(new Cursor(Cursor.HAND_CURSOR));
// Consume Event
// Note: This is to signal the BasicGraphUI's
// MouseHandle to stop further event processing.
e.consume();
} else
// Call Superclass
super.mouseMoved(e);
}
protected PortView getSourcePortAt(Point point) {
//throw new UnsupportedOperationException("Not yet implemented");
// Disable jumping
classPanel.graph.setJumpToDefaultPort(false);
PortView result;
try {
// Find a Port View in Model Coordinates and Remember
result = classPanel.graph.getPortViewAt(point.getX(), point.getY());
} finally {
classPanel.graph.setJumpToDefaultPort(true);
}
return result;
}
protected PortView getTargetPortAt(Point point) {
// throw new UnsupportedOperationException("Not yet implemented");
return classPanel.graph.getPortViewAt(point.getX(), point.getY());
}
protected void paintConnector(Color fg, Color bg, Graphics g) {
// throw new UnsupportedOperationException("Not yet implemented");
// Set Foreground
g.setColor(fg);
// Set Xor-Mode Color
g.setXORMode(bg);
// Highlight the Current Port
paintPort(classPanel.graph.getGraphics());
// If Valid First Port, Start and Current Point
if (firstPort != null && start != null && current != null)
// Then Draw A Line From Start to Current Point
g.drawLine((int) start.getX(), (int) start.getY(),
(int) current.getX(), (int) current.getY());
}
protected void paintPort(Graphics g) {
//throw new UnsupportedOperationException("Not yet implemented");
// If Current Port is Valid
if (port != null) {
// If Not Floating Port...
boolean o = (GraphConstants.getOffset(port.getAllAttributes()) != null);
// ...Then use Parent's Bounds
Rectangle2D r = (o) ? port.getBounds() : port.getParentView()
.getBounds();
// Scale from Model to Screen
r = classPanel.graph.toScreen((Rectangle2D) r.clone());
// Add Space For the Highlight Border
r.setFrame(r.getX() - 3, r.getY() - 3, r.getWidth() + 6, r
.getHeight() + 6);
// Paint Port in Preview (=Highlight) Mode
classPanel.graph.getUI().paintCell(g, port, r, true);
}
}
} |
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