private void ShowStatus (int x, int y)
{
String s = "";
CGNode node = null;
if (x >= 0 && y >= 0) {
try {
CanvasObject co = super.Find (x, y);
if (co instanceof CGNode) {
node = (CGNode)co;
}
} catch (NoSuchElementException ex) {}
if (node == null) {
if (topnode == null)
s = "Button1: create";
} else {
s = "Button1: drag";
if (node.IsConcept()) {
if (node.GetInst() != null)
s += ", Shift-Button1: edit";
if (node == topnode)
s += ", Shift-Ctrl-Button1: remove";
if (menumap.containsKey (node.GetType (true)))
s += ", Button3: menu";
} else {
s += ", Shift-Ctrl-Button1: remove";
}
}
}
frame.status.setStatus (s);
}
private void MenuPopup (MouseEvent ev, CGNode node)
{
if (!node.IsConcept())
return;
String menuname = (String)menumap.get (node.GetType(true));
if (menuname == null)
return;
Hashtable templates = (Hashtable)menus.get (menuname);
if (templates == null)
return;
if( popup != null )
remove( popup );
popup = new PopupMenu( menuname );
Enumeration e = templates.keys();
while (e.hasMoreElements()) {
String key = (String)e.nextElement();
MenuItem mi = new MenuItem( key );
mi.setActionCommand( key );
mi.addActionListener( this );
popup.add( mi );
}
curnode = node;
this.add( popup );
popup.show( this, ev.getX(), ev.getY() );
}
public void actionPerformed( ActionEvent e )
{
String s = e.getActionCommand();
if (s == null)
return;
String menuname = (String)menumap.get (curnode.GetType(true));
Hashtable templates = (Hashtable)menus.get (menuname);
ConceptualGraph cg = (ConceptualGraph)templates.get(s);
AutoUpdateOff ();
CGNode top = ConvertInput (cg);
CGArrow arrow = new CGArrow (0, 0, 0, 0);
Add (arrow);
ToBottom (arrow);
curnode.AddChild (top, arrow);
top.SetParent (curnode, arrow);
Layout (curnode);
AutoUpdateOn ();
NotifyViewers ();
}