/** Handles mouse down events and starts the corresponding tracker. */
public void mouseDown(MouseEvent e, int x, int y) {
// on MS-Windows NT: AWT generates additional mouse down events
// when the left button is down && right button is clicked.
// To avoid dead locks we ignore such events
if (fChild != null) {
return;
}
view().freezeView();
Handle handle = view().findHandle(e.getX(), e.getY());
if (handle != null) {
fChild = createHandleTracker(view(), handle);
} else {
Figure figure = drawing().findFigure(e.getX(), e.getY());
if (figure != null) {
fChild = createDragTracker(figure);
} else {
if (!e.isShiftDown()) {
view().clearSelection();
}
fChild = createAreaTracker();
}
}
fChild.mouseDown(e, x, y);
fChild.activate();
}
/**
* Called when the mouse button has been pressed on a Viewer.
*
* @param mouseEvent The SWT mouse event
* @param viewer The source of the event.
*/
public void mouseDown(MouseEvent mouseEvent, EditPartViewer viewer) {
Tool tool = getActiveTool();
if (tool != null) tool.mouseDown(mouseEvent, viewer);
}