/** The mouse was dragged - either draw a marquee or move some classes. */
public void mouseDragged(MouseEvent evt) {
if (isButtonOne(evt)) {
if (marquee.isActive()) {
Rectangle oldRect = marquee.getRectangle();
marquee.move(evt.getX(), evt.getY());
Rectangle newRect = (Rectangle) marquee.getRectangle().clone();
if (oldRect != null) {
newRect.add(oldRect);
}
newRect.width++;
newRect.height++;
graphEditor.repaint(newRect);
} else if (rubberBand != null) {
rubberBand.setEnd(evt.getX(), evt.getY());
graphEditor.repaint();
} else {
if (!selection.isEmpty()) {
int deltaX = snapToGrid(evt.getX() - dragStartX);
int deltaY = snapToGrid(evt.getY() - dragStartY);
if (resizing) {
selection.resize(deltaX, deltaY);
} else if (moving) {
selection.move(deltaX, deltaY);
}
}
graphEditor.repaint();
}
}
}
/** A key was released. Check whether a key-based move or resize operation has ended. */
public void keyReleased(KeyEvent evt) {
if (moving && (!evt.isShiftDown())) { // key-based moving stopped
selection.moveStopped();
moving = false;
} else if (resizing && (!evt.isControlDown())) { // key-based moving stopped
selection.moveStopped();
resizing = false;
}
graphEditor.repaint();
}
/** The mouse was released. */
public void mouseReleased(MouseEvent evt) {
if (isDrawingDependency()) {
SelectableGraphElement selectedElement = graph.findGraphElement(evt.getX(), evt.getY());
notifyPackage(selectedElement);
graphEditor.repaint();
}
rubberBand = null;
SelectionSet newSelection = marquee.stop(); // may or may not have had a marquee...
if (newSelection != null) {
selection.addAll(newSelection);
graphEditor.repaint();
}
if (moving || resizing) {
endMove();
graphEditor.revalidate();
graphEditor.repaint();
}
}
/** A key was pressed in the graph editor. */
public void keyPressed(KeyEvent evt) {
boolean handled = true; // assume for a start that we are handling the
// key here
if (isArrowKey(evt)) {
if (evt.isControlDown()) { // resizing
if (!resizing) startKeyboardResize();
setKeyDelta(evt);
selection.resize(keyDeltaX, keyDeltaY);
} else if (evt.isShiftDown()) { // moving targets
if (!moving) startKeyboardMove();
setKeyDelta(evt);
selection.move(keyDeltaX, keyDeltaY);
} else { // navigate the diagram
navigate(evt);
}
} else if (isPlusOrMinusKey(evt)) {
resizeWithFixedRatio(evt);
}
// dependency selection
else if (evt.getKeyCode() == KeyEvent.VK_PAGE_UP || evt.getKeyCode() == KeyEvent.VK_PAGE_DOWN) {
selectDependency(evt);
}
// post context menu
else if (evt.getKeyCode() == KeyEvent.VK_SPACE || evt.getKeyCode() == KeyEvent.VK_ENTER) {
postMenu();
}
// 'A' (with any or no modifiers) selects all
else if (evt.getKeyCode() == KeyEvent.VK_A) {
selectAll();
}
// Escape removes selections
else if (evt.getKeyCode() == KeyEvent.VK_ESCAPE) {
if (moving || resizing) {
endMove();
}
clearSelection();
} else {
handled = false;
}
if (handled) evt.consume();
graphEditor.repaint();
}
/** A mouse-pressed event. Analyse what we should do with it. */
public void mousePressed(MouseEvent evt) {
graphEditor.requestFocus();
int clickX = evt.getX();
int clickY = evt.getY();
SelectableGraphElement clickedElement = graph.findGraphElement(clickX, clickY);
notifyPackage(clickedElement);
if (clickedElement == null) { // nothing hit
if (!isMultiselectionKeyDown(evt)) {
selection.clear();
}
if (isButtonOne(evt)) marquee.start(clickX, clickY);
} else if (isButtonOne(evt)) { // clicked on something
if (isMultiselectionKeyDown(evt)) {
// a class was clicked, while multiselectionKey was down.
if (clickedElement.isSelected()) {
selection.remove(clickedElement);
} else {
selection.add(clickedElement);
}
} else {
// a class was clicked without multiselection
if (!clickedElement.isSelected()) {
selection.selectOnly(clickedElement);
}
}
if (isDrawingDependency()) {
if (clickedElement instanceof Target)
rubberBand = new RubberBand(clickX, clickY, clickX, clickY);
} else {
dragStartX = clickX;
dragStartY = clickY;
if (clickedElement.isHandle(clickX, clickY)) {
resizing = true;
} else {
moving = true;
}
}
}
}
/**
* Create the controller for a given graph editor.
*
* @param graphEditor
* @param graph
*/
public SelectionController(GraphEditor graphEditor) {
this.graphEditor = graphEditor;
this.graph = graphEditor.getGraph();
marquee = new Marquee(graph);
selection = new SelectionSet();
}
/**
* Post the context menu on the diagram at the specified location
*
* @param x
* @param y
*/
private void postMenu(int x, int y) {
graphEditor.popupMenu(x, y);
}