ktablecelleditortext2.java

ktable 是一个由java开发的,对控制报表的项目,它最大的特点是使用独特的算法,能支持巨大的报表(千万以上?).

/*
 * Copyright (C) 2004 by Friederich Kupzog Elektronik & Software
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
    
    Author: Friederich Kupzog  
    [e-mail]
    www.kupzog.de/fkmk
*/

package de.kupzog.ktable.editors;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.KeyAdapter;
import org.eclipse.swt.events.KeyEvent;
import org.eclipse.swt.events.TraverseEvent;
import org.eclipse.swt.events.TraverseListener;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Text;

import de.kupzog.ktable.KTable;
import de.kupzog.ktable.KTableCellEditor;

/**
 * A simple cell editor that simply creates a text widget that allows the user
 * to type in one line of text.<p>
 * This class is very similar to <code>KTableCellEditorText</code>, but 
 * allows the navigation within the text widget using ARROW_LEFT and ARROW_RIGHT
 * keys.
 * 
 * @see de.kupzog.ktable.editors.KTableCellEditorText
 * @author Lorenz Maierhofer <[e-mail]>
 */
public class KTableCellEditorText2 extends KTableCellEditor 
{
	protected Text m_Text;
    
    protected KeyAdapter keyListener = new KeyAdapter() {
        public void keyPressed(KeyEvent e) {
            try {
                onKeyPressed(e);
            } catch (Exception ex) {
                ex.printStackTrace();
                // Do nothing
            }
        }
    };
    
    protected TraverseListener travListener = new TraverseListener() {
        public void keyTraversed(TraverseEvent e) {
            onTraverse(e);
        }
    };
	

	public void open(KTable table, int col, int row, Rectangle rect) {
		super.open(table, col, row, rect);
		m_Text.setText(m_Model.getContentAt(m_Col, m_Row).toString());
		m_Text.selectAll();
		m_Text.setVisible(true);
		m_Text.setFocus();
	}


	public void close(boolean save) {
        if (save)
            m_Model.setContentAt(m_Col, m_Row, m_Text.getText());
        m_Text.removeKeyListener(keyListener);
        m_Text.removeTraverseListener(travListener);
        super.close(save);
        m_Text = null;
    }


	protected Control createControl() {
		m_Text = new Text(m_Table, SWT.NONE);
        m_Text.addKeyListener(keyListener);
        m_Text.addTraverseListener(travListener);
		return m_Text;
	}
	
	/**
	 * Implement In-Textfield navigation with the keys... 
	 * @see de.kupzog.ktable.KTableCellEditor#onTraverse(org.eclipse.swt.events.TraverseEvent)
	 */
	protected void onTraverse(TraverseEvent e) {
	    if (e.keyCode == SWT.ARROW_LEFT) {
	        if (m_Text.getCaretPosition()==0 && m_Text.getSelectionCount()==0)
	            super.onTraverse(e);
	        // handel the event within the text widget!
	    } else if (e.keyCode == SWT.ARROW_RIGHT) {
	        if (m_Text.getCaretPosition()==m_Text.getText().length() && m_Text.getSelectionCount()==0)
	            super.onTraverse(e);
	        // handle the event within the text widget!
	    } else
	        super.onTraverse(e);
	}
	
	protected void onKeyPressed(KeyEvent e) {
		if ((e.character == '\r')  && ((e.stateMask & SWT.SHIFT) == 0)) {
			close(true);
			// move one row below!
//			if (m_Row<m_Model.getRowCount())
//			    m_Table.setSelection(m_Col, m_Row+1, true);
		} else
		    super.onKeyPressed(e);
	}
	
	/* 
	 * overridden from superclass
	 */
	public void setBounds(Rectangle rect) 
	{
		super.setBounds(new Rectangle(rect.x, rect.y+(rect.height - 15)/2+1,
									  rect.width, 15));
	}
	
	/* (non-Javadoc)
     * @see de.kupzog.ktable.KTableCellEditor#setContent(java.lang.Object)
     */
    public void setContent(Object content) {
        m_Text.setText(content.toString());
        m_Text.setSelection(content.toString().length());
    }

}