/*!
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* 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 Lesser General Public License for more details.
*
* Copyright (c) 2002-2013 Pentaho Corporation.. All rights reserved.
*/
package org.pentaho.reporting.designer.core.editor;
import javax.swing.*;
import javax.swing.plaf.ComponentUI;
import java.awt.*;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionListener;
import java.awt.event.MouseWheelEvent;
import java.awt.event.MouseWheelListener;
import java.text.DecimalFormat;
/**
* Todo: Document me!
*
* @author Thomas Morgner
*/
public class ZoomController extends JLabel {
private class ZoomHandler extends MouseAdapter implements
MouseMotionListener, MouseWheelListener {
private int dragStartPoint;
public void mouseWheelMoved( final MouseWheelEvent e ) {
// every click is 1%
final float diff = e.getWheelRotation() * 0.01f;
final float zoomFactor = zoomModel.getZoomAsPercentage();
zoomModel.setZoomAsPercentage( Math.min( 5, Math.max( 0.1f, zoomFactor - diff ) ) );
}
public void mouseClicked( final MouseEvent e ) {
if ( e.getClickCount() == 2 && e.getButton() == MouseEvent.BUTTON1 ) {
zoomModel.setZoomAsPercentage( 1 );
}
}
public void mousePressed( final MouseEvent e ) {
dragStartPoint = e.getX();
}
public void mouseDragged( final MouseEvent e ) {
// every point moved is 1% + or - to the zoom factor
final float diff = ( dragStartPoint - e.getX() ) * 0.01f;
final float zoomFactor = zoomModel.getZoomAsPercentage();
zoomModel.setZoomAsPercentage( Math.min( 5, Math.max( 0.1f, zoomFactor - diff ) ) );
dragStartPoint = e.getX();
}
public void mouseMoved( final MouseEvent e ) {
}
}
private class ZoomUpdateHandler implements ZoomModelListener {
public void zoomFactorChanged() {
setText( format.format( zoomModel.getZoomAsPercentage() ) );
}
}
private ZoomModel zoomModel;
private DecimalFormat format;
public ZoomController( final ZoomModel model ) {
if ( model == null ) {
throw new NullPointerException();
}
this.format = new DecimalFormat( "##0%" );
this.zoomModel = model;
this.zoomModel.addZoomModelListener( new ZoomUpdateHandler() );
setBackground( SystemColor.control );
setHorizontalAlignment( JLabel.CENTER );
setText( format.format( zoomModel.getZoomAsPercentage() ) );
final ZoomHandler zoomHandler = new ZoomHandler();
addMouseListener( zoomHandler );
addMouseMotionListener( zoomHandler );
addMouseWheelListener( zoomHandler );
}
/**
* If the minimum size has been set to a non-<code>null</code> value just returns it. If the UI delegate's
* <code>getMinimumSize</code> method returns a non-<code>null</code> value then return that; otherwise defer to the
* component's layout manager.
*
* @return the value of the <code>minimumSize</code> property
* @see #setMinimumSize
* @see ComponentUI
*/
public Dimension getMinimumSize() {
return getPreferredSize();
}
}