/**
* Is the given position near an already selected figure?
*
* @param x x-coordinate of point to check
* @param y y-coordinate of point to check
* @return whether the checked point is near an already selected figure.
*/
private boolean isNearSelected(int x, int y) {
boolean result = false;
for (Figure f : view.getModel().getFigures()) {
if (view.getSelection().contains(f) && f.contains(x, y)) {
result = true;
break;
}
}
return result;
}
@Override
public void mouseUp(int i, int j, MouseEvent e) {
if (currentHandle != null) {
currentHandle.stopInteraction(i, j, e, view);
currentHandle = null;
return;
}
if (selMode) {
selMode = false;
view.setSelectionRubberBand(null);
view.repaint();
}
if (e.isShiftDown() && e.getX() == originalX && e.getY() == originalY) {
for (Figure f : view.getModel().getFigures()) {
if (f.contains(originalX, originalY)) {
if (view.getSelection().contains(f) && f != lastSelectedFigure) {
view.removeFromSelection(f);
}
view.repaint();
break;
}
}
}
}
@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();
}
@Override
public void mouseDrag(int i, int j, java.awt.event.MouseEvent e) {
if (currentHandle != null) {
currentHandle.dragInteraction(i, j, e, view);
return;
}
if (selMode) {
sx1 = e.getX();
sy1 = e.getY();
Set<Figure> sel = new HashSet<Figure>();
Rectangle selRectangle =
new Rectangle(min(sx0, sx1), min(sy0, sy1), abs(sx1 - sx0), abs(sy1 - sy0));
for (Figure f : view.getModel().getFigures()) {
if (contains(selRectangle, f.getBounds())) {
sel.add(f);
}
}
view.setSelectionRubberBand(selRectangle);
view.clearSelection();
for (Figure f : sel) {
view.addToSelection(f);
}
view.repaint();
return;
}
int k = i - tempX;
int l = j - tempY;
for (Figure f : view.getSelection()) {
f.move(k, l);
view.getModel().getDrawCommandHandler().addCommand(new MoveCommand(f, k, l));
}
tempX = i;
tempY = j;
view.repaint();
}