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() );
}
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 RemoveFromCanvas (CGNode root)
{
super.Remove (root);
for (int i = root.NumChilds()-1; i >= 0; --i) {
super.Remove (root.ArrowAt(i));
RemoveFromCanvas (root.ChildAt(i));
}
}
private void Drop (MouseEvent ev)
{
switch (state) {
case stateDrag:
state = stateIdle;
CheckResize ();
break;
case stateCreate:
CGNode node = new CGNode (ev.getX(), ev.getY(), "something",
getFontMetrics (getFont()),
!curnode.IsConcept());
curnode.AddChild (node, curarrow);
node.SetParent (curnode, curarrow);
ToBottom (curarrow);
Add (node);
if (!node.IsConcept()) {
int x = ev.getX() + node.Bbox().width + layoutXDist;
CGNode node2 = new CGNode (x, ev.getY(), "something",
getFontMetrics (getFont()),
true);
CGArrow arrow2 = new CGArrow (0, 0, 0, 0);
node.AddChild (node2, arrow2);
node2.SetParent (node, arrow2);
Add (node2);
Add (arrow2);
ToBottom (arrow2);
}
state = stateIdle;
NotifyViewers();
break;
}
ShowStatus (ev.getX(), ev.getY());
}
private void LayoutPass2 (CGNode root, int x, Vector vdist, int level)
{
Rectangle bbox = root.Bbox();
int width = ((Integer)vdist.elementAt(level)).intValue();
root.MoveTo (x + (width - bbox.width)/2, root.layout_y);
int nchilds = root.NumChilds();
for (int i = 0; i < nchilds; ++i) {
LayoutPass2 (root.ChildAt(i), x+width+layoutXDist, vdist, level+1);
}
}
public void entryBoxHandler (EntryBox e, Object arg)
{
if (state != stateEdit)
return;
state = stateIdle;
if (e.GetButton() == 0) {
curnode.SetInst (e.GetText());
NotifyViewers();
}
}
private int LayoutPass1 (CGNode root, int y, Vector vdist, int level)
{
Rectangle bbox = root.Bbox();
root.layout_y = y;
root.SortChilds ();
if (level >= vdist.size()) {
vdist.addElement (new Integer (bbox.width));
} else {
int width = ((Integer)vdist.elementAt(level)).intValue();
if (width < bbox.width) {
vdist.setElementAt (new Integer (bbox.width), level);
}
}
int nchilds = root.NumChilds(), y2 = y;
for (int i = 0; i < nchilds; ++i) {
y2 = LayoutPass1 (root.ChildAt(i), y2, vdist, level+1);
}
return Math.max (y + bbox.height + layoutYDist, y2);
}
private void ConvertOutput (StringBuffer ostr, CGNode node)
{
node.SortChilds ();
String s = node.GetText();
if (node.IsConcept()) {
ostr.append ("[" + s + "]");
} else {
ostr.append ("(" + s + ")");
}
int nchilds = node.NumChilds();
if (nchilds == 1) {
ostr.append ("->");
ConvertOutput (ostr, node.ChildAt (0));
} else if (nchilds > 1) {
ostr.append ("-");
for (int i = 0; i < nchilds; ++i) {
ostr.append ("->");
ConvertOutput (ostr, node.ChildAt (i));
if (i+1 != nchilds)
ostr.append (",");
}
ostr.append (".");
}
}
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 ();
}
private CGNode ConvertInput (ConceptualGraph cg)
{
StringBuffer ostr = new StringBuffer();
cg.getNode().print (ostr);
String s = ostr.toString();
s = s.substring (1, s.length()-1);
CGNode node = new CGNode (0, 0, s, getFontMetrics(getFont()),
cg.getNode() instanceof ConceptNode);
Add (node);
ConceptualGraph cg2;
for (cg2 = cg.getWidth(); cg2 != null; cg2 = cg2.getDepth()) {
CGNode node2 = ConvertInput (cg2);
CGArrow arrow2 = new CGArrow (0, 0, 0, 0);
Add (arrow2);
ToBottom (arrow2);
node.AddChild (node2, arrow2);
node2.SetParent (node, arrow2);
}
return node;
}
private void Drag (MouseEvent ev)
{
switch (state) {
case stateDrag:
curnode.Move (ev.getX() - dragx, ev.getY() - dragy);
dragx = ev.getX();
dragy = ev.getY();
break;
case stateCreate:
curarrow.MoveHeadTo (ev.getX(), ev.getY());
break;
}
}
public void Layout (CGNode root)
{
int x, y;
if (root == null) {
if ((root = topnode) == null)
return;
x = layoutXDist;
y = layoutYDist;
} else {
x = root.Bbox().x;
y = root.Bbox().y;
}
AutoUpdateOff ();
Vector vdist = new Vector();
LayoutPass1 (root, y, vdist, 0);
LayoutPass2 (root, x, vdist, 0);
CheckResize ();
AutoUpdateOn ();
}
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;
}
}
}