/*
 * Moonlight|3D Copyright (C) 2005 The Moonlight|3D team
 * 
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 * 
 * This library 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 Lesser General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 * 
 * Created on Jul 6, 2005
 */
package ml.ui.core;

import ml.core.State;
import ml.core.exceptions.Exception;

import com.trolltech.qt.gui.QAction;
import com.trolltech.qt.gui.QCloseEvent;
import com.trolltech.qt.gui.QMainWindow;
import com.trolltech.qt.gui.QMenu;
import com.trolltech.qt.gui.QStatusBar;
import com.trolltech.qt.gui.QWidget;

public class ApplicationWindow extends QMainWindow {
    private FrameLayout frameLayout;
    
    public ApplicationWindow(FrameLayout layout, boolean blockOnOpen)
    {
        super();
        setWindowTitle(layout.getTitle());
        
        this.frameLayout=layout;

        UIManager uiManager=ml.core.State.getInstance().getUIManager();

        QWidget toplevel=uiManager.getMainWidget(this, layout.getName());
        setCentralWidget(toplevel);
        
        rebuildMenuBar();
        
        setStatusBar(new QStatusBar());

        uiManager.registerApplicationWindow(this);
    }
    
    private void buildMenu(MenuNode menu, QMenu parent) {
    	for(MenuNode child : menu.getChildren()) {
    		if(child.getType()==MenuNode.Type.Menu) {
    			// add submenu and recurse
    			QMenu childMenu=new QMenu(child.getName(),parent);
    			childMenu.setTearOffEnabled(true);
    			buildMenu(child,childMenu);
    			parent.addMenu(childMenu);
    		} else if(child.getType()==MenuNode.Type.ExtensionPoint) {
    			// process contributions as if they were at the current menu level
    			for(MenuNode contribution : child.getChildren()) {
   					buildMenu(contribution,parent);
    			}
    		} else if(child.getType()==MenuNode.Type.Entry) {
    			// retrieve action and append it
    			QAction action;
    			try {
					action=ml.core.State.getInstance().getUIManager().getActionByName(child.getActionName());
				} catch (Exception e) {
					// build a greyed out default action
					action=new QAction(child.getName(),parent);
					action.setDisabled(true);
				}
				action.setText(child.getName());
				parent.addAction(action);
    		} else if(child.getType()==MenuNode.Type.Generator) {
    			// retrieve generator and append generated actions
    			try {
        			ActionGenerator generator;
					generator=ml.core.State.getInstance().getUIManager().getActionGeneratorByName(child.getName());
					for(Action action : generator.getActions()) {
						parent.addAction(action);
					}
				} catch (Exception e) {
					// build a greyed out default action
					QAction defaultAction=new QAction(child.getName(),parent);
					defaultAction.setDisabled(true);
					parent.addAction(defaultAction);
				}
    		} else if(child.getType()==MenuNode.Type.Separator) {
    			parent.addSeparator();
    		}
    	}    	
    }

    private void rebuildMenuBar(MenuNode menu) {
    	for(MenuNode child : menu.getChildren()) {
    		if(child.getType()==MenuNode.Type.Menu) {
    			// add submenu and recurse
    			QMenu childMenu=new QMenu(child.getName(),menuBar());
    			childMenu.setTearOffEnabled(true);
    			buildMenu(child,childMenu);
    			menuBar().addMenu(childMenu);
    		} else if(child.getType()==MenuNode.Type.ExtensionPoint) {
    			// process contributions as if they were at the current menu level
    			for(MenuNode contribution : child.getChildren()) {
    				rebuildMenuBar(contribution);
    			}
    		} else if(child.getType()==MenuNode.Type.Entry) {
    			// retrieve action and append it
    			QAction action;
    			try {
					action=ml.core.State.getInstance().getUIManager().getActionByName(child.getActionName());
				} catch (Exception e) {
					// build a greyed out default action
					action=new QAction(child.getName(),menuBar());
					action.setDisabled(true);
				}
				menuBar().addAction(action);
    		} else if(child.getType()==MenuNode.Type.Generator) {
    			// retrieve generator and append generated actions
    			try {
        			ActionGenerator generator;
					generator=ml.core.State.getInstance().getUIManager().getActionGeneratorByName(child.getName());
					for(Action action : generator.getActions()) {
						menuBar().addAction(action);
					}
				} catch (Exception e) {
					// build a greyed out default action
					QAction defaultAction=new QAction(child.getName(),menuBar());
					defaultAction.setDisabled(true);
					menuBar().addAction(defaultAction);
				}
    		} else if(child.getType()==MenuNode.Type.Separator) {
    			menuBar().addSeparator();
    		}
    	}      	
    }

    public void rebuildMenuBar() {
    	menuBar().clear();
    	
    	MenuNode menu=frameLayout.getMenu();
    	rebuildMenuBar(menu);
    }
    
    @Override
	public void closeEvent(QCloseEvent event) {
		ml.core.State.getInstance().getUIManager().unregisterApplicationWindow(this);
		// replace layout in UIManager with this layout
		State.getInstance().getUIManager().addOrReplaceLayout(frameLayout);
		dispose();
    }
}