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/* InvariantTreeHelpManager.java
* =========================================================================
* This file is part of the GrInvIn project - http://www.grinvin.org
*
* Copyright (C) 2005-2008 Universiteit Gent
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* A copy of the GNU General Public License can be found in the file
* LICENSE.txt provided with the source distribution of this program (see
* the META-INF directory in the source jar). This license can also be
* found on the GNU website at http://www.gnu.org/licenses/gpl.html.
*
* If you did not receive a copy of the GNU General Public License along
* with this program, contact the lead developer, or write to the Free
* Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
package org.grinvin.help;
import java.awt.AWTEvent;
import java.awt.Component;
import java.awt.Point;
import java.awt.event.ActionEvent;
import java.awt.event.MouseEvent;
import javax.help.CSH.Manager;
import javax.help.HelpSet;
import javax.swing.tree.DefaultMutableTreeNode;
import org.grinvin.invariants.Invariant;
import org.grinvin.invariants.InvariantFactory;
import org.grinvin.gui.components.InvariantTreeComponent;
/**
* Provides dynamic map ID assignment for the tree view of available invariants.
*/
public class InvariantTreeHelpManager implements Manager {
private InvariantTreeComponent tree;
/** Creates a new instance of InvariantTreeHelpManager */
public InvariantTreeHelpManager(InvariantTreeComponent tree) {
this.tree = tree;
}
public HelpSet getHelpSet(Object object, AWTEvent aWTEvent) {
return HelpManager.getHelpSet();
}
public String getHelpIDString(Object object, AWTEvent aWTEvent) {
if(object.equals(tree)){
if(aWTEvent instanceof MouseEvent){
MouseEvent e = (MouseEvent) aWTEvent;
Point parentPosition = ((Component)e.getSource()).getLocationOnScreen();
Point treePosition = tree.getLocationOnScreen();
int dx = parentPosition.x - treePosition.x;
int dy = parentPosition.y - treePosition.y;
tree.setSelectionPath(tree.getClosestPathForLocation(e.getX() + dx, e.getY() + dy));
try {
Object selectedNode = tree.getLastSelectedPathComponent();
if(selectedNode instanceof DefaultMutableTreeNode) {
Object nodeItem = ((DefaultMutableTreeNode)selectedNode).getUserObject();
//should be Invariant or InvariantFactory
if(nodeItem instanceof Invariant){
return validateID(((Invariant)nodeItem).getId());
} else if(nodeItem instanceof InvariantFactory){
return validateID(((InvariantFactory)nodeItem).getId());
}
}
return null;
} catch (ClassCastException ex) {
//something went wrong: too bad, no help for this item
return null;
}
} else if (aWTEvent instanceof ActionEvent) {
try {
Object selectedNode = tree.getLastSelectedPathComponent();
if(selectedNode instanceof DefaultMutableTreeNode) {
Object nodeItem = ((DefaultMutableTreeNode)selectedNode).getUserObject();
//should be Invariant or InvariantFactory
if(nodeItem instanceof Invariant){
return validateID(((Invariant)nodeItem).getId());
} else if(nodeItem instanceof InvariantFactory){
return validateID(((InvariantFactory)nodeItem).getId());
}
}
return null;
} catch (ClassCastException ex) {
//something went wrong: too bad, no help for this item
return null;
}
}
return null;
} else
return null;
}
private String validateID(String id) {
HelpSet hs = HelpManager.getHelpSet();
if(hs.getCombinedMap().isValidID(id, hs))
return id;
else
return null;
}
}
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