private void deleteConnections(Collection<ConnectionFigure> connections) {
boolean dirty = false;
List<Connection> connectionsToDelete = new ArrayList<>();
for (ConnectionFigure connectionFigure : connections) {
connectionsToDelete.add(connectionFigure.getConnection());
dirty = true;
}
if (editorsCommandStack == null) {
description.removeConnections(connectionsToDelete);
targetTreeViewer.refresh();
sourceTreeViewer.refresh();
} else {
ConnectionDeleteCommand connectionDeleteCommand =
new ConnectionDeleteCommand(description, connectionsToDelete);
editorsCommandStack.execute(connectionDeleteCommand);
}
if (dirty) {
repaint();
}
}
/** Repaints the connections on the canvas. */
public void repaint() {
// clear the parent figure
parentFigure.removeAll();
// for each connection create a connection figure and add it to the parent figure
for (Connection c : description.getConnections()) {
TreeItem outputItem =
sourceTreeViewer.findEndpoint(c.getSourceNode(), c.getOutput().getName());
TreeItem inputItem = targetTreeViewer.findEndpoint(c.getTargetNode(), c.getInput().getName());
// calculate the coordinates of the connection figure (the line) on the canvas
if (inputItem != null && outputItem != null) {
int outputY = outputItem.getBounds().y + outputItem.getBounds().height / 2;
int outputX = 0;
int inputY = inputItem.getBounds().y + inputItem.getBounds().height / 2;
int inputX = parentFigure.getBounds().width;
// create the connection figure (the connection line)
ConnectionFigure line =
new ConnectionFigure(c, new Point(outputX, outputY), new Point(inputX, inputY));
// add the connection figure to the parent figure
line.setAntialias(SWT.ON);
parentFigure.add(line);
}
}
}
