package org.hwo.ui;

import java.awt.Container;
import java.awt.Rectangle;
import java.util.LinkedList;
import java.util.List;

import javax.swing.JTextField;

import org.hwo.ui.treetable.TreeTable;

public class DefaultCellEditor implements CellEditor {

	private List<CellEditorListener> editorListeners;
	
	private JTextField	textField;
	private TreeTable	treeTable;
	private Object		value;
	
	public DefaultCellEditor()
	{
		editorListeners = new LinkedList<CellEditorListener>();
	}
	
	@Override
	public void addCellEditorListener(CellEditorListener listener) {
		editorListeners.add(listener);
	}

	@Override
	public void removeCellEditorListener(CellEditorListener listener) {
		editorListeners.remove(listener);
	}
	
	private void fireEditBegin()
	{
		CellEditorArgs args = new CellEditorArgs(this, value, treeTable);
		for (CellEditorListener listener: editorListeners)
			listener.editBegin(args);
	}
	private void fireEditFinish()
	{
		CellEditorArgs args = new CellEditorArgs(this, value, treeTable);
		for (CellEditorListener listener: editorListeners)
			listener.editFinished(args);
	}
	private void fireEditCancel()
	{
		CellEditorArgs args = new CellEditorArgs(this, value, treeTable);
		for (CellEditorListener listener: editorListeners)
			listener.editCanceled(args);
	}
	
	private void destroyTextField()
	{
		textField.setVisible(false);
		Container parent = textField.getParent();
		
		parent.remove(textField);
		
		textField = null;
	}

	@Override
	public boolean editBegin(TreeTable treeTable, Rectangle rect, Object value) {
		if (textField != null)
			editCancel();
		
		this.treeTable = treeTable;
		this.value = value;
		
		this.textField = new JTextField();
		treeTable.add(textField);
		
		textField.setBounds(rect);
		textField.requestFocusInWindow();
		textField.repaint();
		
		fireEditBegin();
		
		return true;
	}

	@Override
	public void editCancel() {
		if (textField != null)
		{
			destroyTextField();
			
			fireEditCancel();
		}
		
	}

	@Override
	public void editFinish() {
		if (this.textField != null)
		{
			this.value = this.textField.getText();
			destroyTextField();
					
			fireEditFinish();			
		}
	}

	
	
}