/*
 * Copyright (c) 2006 Manuel Traut and Volker Dahnke
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 *
 * Contributors: Manuel Traut and Volker Dahnke
 */

package YalpClients.SwtClient.GUI;

import YalpClients.*;
import YalpClients.SwtClient.*;

import YalpInterfaces.*;

import org.eclipse.swt.*;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;

import java.util.LinkedList;

/*
 * Class Browser
 *
 * <em></em>
 *
 * @author Volker Dahnke / Manuel Traut
 *
 * @version 1 02-04-2006<br>
 */
public class Browser extends Composite{
	private Composite parentComposite;
	private Display display1;
	private Shell shell;
	private Model model;
	private LinkedList<String> alreadyBrowsed;
	private Tree tree;
	private Button add;
	private Button cancel;
	
	Browser( Composite parent,
					 final Model model,
					 Display display,
					 Composite parentComposite,
					 int style )
	{
		super(parent, style);
		this.parentComposite=parentComposite;
		this.alreadyBrowsed = new LinkedList<String>();
		this.model = model;
		this.display1 = display;
		this.shell = new Shell(this.display1,SWT.NONE);
		this.setSize(300,400);
		GridLayout gridLayout = new GridLayout();
		this.shell.setLayout(gridLayout);
		gridLayout.numColumns = 2;

		GridData treeGrid = new GridData();
		treeGrid.horizontalSpan = 2;
		treeGrid.widthHint = 300;
		treeGrid.heightHint = 400;
		treeGrid.grabExcessHorizontalSpace = true;
		treeGrid.grabExcessVerticalSpace = true;
		treeGrid.horizontalAlignment = SWT.FILL;
		treeGrid.verticalAlignment = SWT.FILL;

		this.tree = new Tree(this.shell, SWT.SINGLE);
		this.tree.setLayoutData(treeGrid);

		TreeItem tmp;
		for(YalpFile aFile : model.getDir("/")){
			tmp = new TreeItem(this.tree, SWT.NULL);
			tmp.setText(aFile.name);
			if(aFile.isDir) tmp.setImage(new Image(display1, "folder.gif"));
			else tmp.setImage(new Image(display1, "yalpV2_klein.gif"));
		}

		this.tree.addSelectionListener (
			new SelectionAdapter() {

				public void widgetSelected(SelectionEvent e) {
					String path = getPath();
					if(!alreadyBrowsed.contains(path)){
						alreadyBrowsed.add(path);
						TreeItem tmp;
						for(YalpFile aFile : model.getDir(path)){
							tmp = new TreeItem(tree.getSelection()[0],SWT.NULL);
							tmp.setText(aFile.name);
							if(aFile.isDir) tmp.setImage(new Image(display1, "folder.gif"));
							else tmp.setImage(new Image(display1, "yalpV2_klein.gif"));
							tmp.getParentItem().setExpanded(true);
						}
					}
				}
			}
		);

		GridData buttonGrid1 = new GridData();
		buttonGrid1.horizontalSpan = 1;

		this.add = new Button(this.shell, SWT.PUSH);
		this.add.setText("Indicate");
		this.add.setLayoutData(buttonGrid1);
		this.add.addSelectionListener(new SelectionAdapter(){
			public void widgetSelected(SelectionEvent e){
				model.addDir(getPath());
				parentEnable(true);
				shell.setVisible(false);
			}
		});

		GridData buttonGrid2 = new GridData();
		buttonGrid2.horizontalSpan = 1;
		buttonGrid2.horizontalAlignment = SWT.END;

		this.cancel = new Button(this.shell, SWT.PUSH);
		this.cancel.setText("Cancel");
		this.cancel.setLayoutData(buttonGrid2);
		this.cancel.addSelectionListener(new SelectionAdapter(){
			public void widgetSelected(SelectionEvent e){
				parentEnable(true);
				shell.setVisible(false);
			}
		});
	}

	public void show(){
		parentEnable(false);
		Point size=this.getSize();
		Rectangle parentRec=((Shell)this.parentComposite).getBounds();
		Rectangle thisRec=this.shell.computeTrim(parentRec.x+(parentRec.width/2)-(size.x/2),parentRec.y+(parentRec.height/2)-(size.y/2),size.x,size.y);
		shell.setBounds(thisRec);
		shell.open();
		while(!shell.isDisposed()){
			if(!this.display1.readAndDispatch()) this.display1.sleep();
		}
		this.display1.dispose();
	}

	private String getPath(){
		TreeItem actualItem = tree.getSelection()[0];
		String path = "/"+tree.getSelection()[0].getText();
		while(actualItem.getParentItem() != null){
			actualItem = actualItem.getParentItem();
			path = "/" + actualItem.getText() + path;
		}
		return path;
	}
	private void parentEnable(boolean bool){
		parentComposite.setEnabled(bool);
	}
}