private void Pick (MouseEvent ev)
{
if (state != stateIdle)
return;
CGNode node = null;
try {
CanvasObject co = super.Find (ev.getX(), ev.getY());
if (co instanceof CGNode) {
node = (CGNode)co;
}
} catch (NoSuchElementException ex) {}
if (node != null && node.IsConcept() &&
(ev.getModifiers() & Event.META_MASK) != 0) {
// template menu
MenuPopup (ev, node);
} else {
switch (ev.getModifiers() & (Event.SHIFT_MASK | Event.CTRL_MASK)) {
case Event.SHIFT_MASK:
// edit
if (node != null) {
String s = node.GetInst();
if (s != null) {
curnode = node;
Edit (s);
}
}
break;
case Event.CTRL_MASK:
// drag
if (node != null) {
state = stateDrag;
ToTop (node);
curnode = node;
dragx = ev.getX();
dragy = ev.getY();
}
break;
case Event.SHIFT_MASK|Event.CTRL_MASK:
// delete subtree
if (node != null) {
// ZZZ only allowed for relations or topnode
if (node.IsConcept() && node != topnode)
break;
CGNode parent = node.GetParent ();
if (parent == null || parent.IsConcept() ||
parent.NumChilds() > 1) {
AutoUpdateOff ();
if (parent != null) {
parent.DelChild (node);
Remove (node.GetParentArrow());
}
RemoveFromCanvas (node);
AutoUpdateOn ();
}
if (node == topnode)
topnode = null;
NotifyViewers();
}
break;
default:
if (node == null && topnode == null) {
// create topnode
topnode = new CGNode (ev.getX(), ev.getY(),
"OPERATION:deposit",
getFontMetrics (getFont()),
true);
Add (topnode);
NotifyViewers ();
} else if (node != null) {
// ZZZ drag
state = stateDrag;
ToTop (node);
curnode = node;
dragx = ev.getX();
dragy = ev.getY();
}
/*
* ZZZ creating subnodes not allowed
else if (node != null && topnode != null) {
state = stateCreate;
curnode = node;
Rectangle pos = node.Bbox();
curarrow = new CGArrow (pos.x+pos.width-1,
pos.y+pos.height/2,
ev.x, ev.y);
Add (curarrow);
}
*/
break;
}
}
}
