@Override
public void mouseDown(int constrainedX, int constrainedY, MouseEvent e) {
originalX = e.getX();
originalY = e.getY();
tempX = constrainedX;
tempY = constrainedY;
// 0. check, whether a handle is selected
lastSelectedFigure = null;
currentHandle = view.getHandle(originalX, originalY, e);
if (currentHandle != null) {
currentHandle.startInteraction(constrainedX, constrainedY, e, view);
return;
}
// 1. check, whether mouse position is near by an already
// selected figure; in this case keep selection
if (!isNearSelected(originalX, originalY)) {
// 2. if click is outside of existing selection then
// deselect all figures - except if shift is down
// (modifier used to extend selection)
if (!e.isShiftDown()) {
view.clearSelection();
}
// 3. look for new figures (which are not already
// selected) and select them. Only one figure.
List<Figure> figures = new LinkedList<Figure>();
for (Figure f : view.getModel().getFigures()) {
figures.add(0, f);
}
for (Figure f : figures) {
if (f.contains(originalX, originalY) && !view.getSelection().contains(f)) {
view.addToSelection(f);
lastSelectedFigure = f;
break;
}
}
// 4. if dragging mouse for spanning a selection, remember starting position (sx0, sy0) and
// initialize
// current position (sx1, sy1).
if (lastSelectedFigure == null && !e.isShiftDown()) {
sx0 = originalX;
sy0 = originalY;
sx1 = originalX;
sy1 = originalY;
selMode = true;
}
}
view.repaint();
}
