"test.action.WheelPanActionTest",

/*

 * The contents of this file are subject to the terms of the Common Development

 * and Distribution License (the License). You may not use this file except in

 * compliance with the License.

 *

 * You can obtain a copy of the License at http://www.netbeans.org/cddl.html

 * or http://www.netbeans.org/cddl.txt.

 *

 * When distributing Covered Code, include this CDDL Header Notice in each file

 * and include the License file at http://www.netbeans.org/cddl.txt.

 * If applicable, add the following below the CDDL Header, with the fields

 * enclosed by brackets [] replaced by your own identifying information:

 * "Portions Copyrighted [year] [name of copyright owner]"

 *

 * The Original Software is NetBeans. The Initial Developer of the Original

 * Software is Sun Microsystems, Inc. Portions Copyright 1997-2007 Sun

 * Microsystems, Inc. All Rights Reserved.

 */

package test.action;

import org.netbeans.api.visual.action.ActionFactory;

import test.SceneSupport;

import test.general.StringGraphScene;

import java.awt.*;

/**

 * @author David Kaspar

 */

public class WheelPanActionTest {

    public static void main (String[] args) {

        StringGraphScene scene = new StringGraphScene ();

        for (int a = 1; a <= 100; a ++)

            scene.addNode (String.valueOf(a)).setPreferredLocation (new Point (a * 10, a * 10));

        scene.getActions ().addAction (ActionFactory.createWheelPanAction ());

        scene.getActions ().addAction (ActionFactory.createMouseCenteredZoomAction (1.5));

        SceneSupport.show (scene);

    }

}

        <change>

            <api name="general"/>

            <summary>WheelPanAction introduced</summary>

            <version major="2" minor="7"/>

            <date day="25" month="6" year="2007"/>

            <author login="dkaspar"/>

            <compatibility addition="yes"/>

            <description>

                WheelPanAction has been added to allow vertical and horizontal scrolling of a scene view using mouse wheel.

            </description>

            <class package="org.netbeans.api.visual.action" name="ActionFactory" link="yes"/>

            <issue number="107774"/>

        </change>

    private static final PanAction PAN_ACTION = new PanAction ();

    private static final WheelPanAction WHEEL_PAN_ACTION = new WheelPanAction ();

<p>

The <code>WheelPanAction</code> allows to scroll ascene view using mouse-wheel. Then no key modifier is pressed, then the view is scrolled vertically. If shift key is held, then the view is scrolled horizontally.

/*

 * The contents of this file are subject to the terms of the Common Development

 * and Distribution License (the License). You may not use this file except in

 * compliance with the License.

 *

 * You can obtain a copy of the License at http://www.netbeans.org/cddl.html

 * or http://www.netbeans.org/cddl.txt.

 *

 * When distributing Covered Code, include this CDDL Header Notice in each file

 * and include the License file at http://www.netbeans.org/cddl.txt.

 * If applicable, add the following below the CDDL Header, with the fields

 * enclosed by brackets [] replaced by your own identifying information:

 * "Portions Copyrighted [year] [name of copyright owner]"

 *

 * The Original Software is NetBeans. The Initial Developer of the Original

 * Software is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun

 * Microsystems, Inc. All Rights Reserved.

 */

package org.netbeans.modules.visual.action;

import org.netbeans.api.visual.action.WidgetAction;

import org.netbeans.api.visual.widget.Widget;

import javax.swing.*;

import java.awt.event.InputEvent;

import java.awt.*;

/**

 * @author David Kaspar

 */

public class WheelPanAction extends WidgetAction.Adapter {

    public State mouseWheelMoved (Widget widget, WidgetMouseWheelEvent event) {

        JComponent view = widget.getScene ().getView ();

        Rectangle visibleRect = view.getVisibleRect ();

        int amount = event.getWheelRotation () * 64;

        switch (event.getModifiers () & (InputEvent.SHIFT_MASK | InputEvent.CTRL_MASK | InputEvent.ALT_MASK)) {

            case InputEvent.SHIFT_MASK:

                visibleRect.x += amount;

                break;

            case 0:

                visibleRect.y += amount;

                break;

            default:

                return State.REJECTED;

        }

        view.scrollRectToVisible (visibleRect);

        return State.CONSUMED;

    }

}

<li><strong>test.action.WheelPanActionTest</strong> - how to use wheel pan action