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Viewing changes to src/jhv/src/org/helioviewer/jhv/gui/components/WheelSupport.java

  • Committer: José Juan Sánchez Hernández
  • Date: 2013-02-05 13:32:08 UTC
  • Revision ID: josejuan.sanchez@gmail.com-20130205133208-dfz1sh1uge5pjkny
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src/jhv/src/org/helioviewer/jhv/gui/components/WheelSupport.java
 
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package org.helioviewer.jhv.gui.components;
 
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/*
 
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 * @(#)SpinnerWheelSupport.java 7/28/2006
 
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 *
 
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 * Copyright 2002 - 2006 JIDE Software Inc. All rights reserved.
 
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 */
 
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import javax.swing.*;
 
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import java.awt.event.ActionEvent;
 
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import java.awt.event.MouseWheelEvent;
 
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import java.awt.event.MouseWheelListener;
 
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/**
 
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 * A helper class to add mouse wheel support to JSpinner. You can call
 
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 * {@link #installMouseWheelSupport(javax.swing.JSpinner)} to add the support
 
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 * and {@link #uninstallMouseWheelSupport(JComponent)} to remove the support.
 
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 */
 
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public class WheelSupport {
 
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    public static final String CLIENT_PROPERTY_MOUSE_WHEEL_LISTENER = "mouseWheelListener";
 
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    protected static final String SPINNER_ACTION_NAME_INCREMENT = "increment";
 
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    protected static final String SPINNER_ACTION_NAME_DECREMENT = "decrement";
 
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    protected static final String SLIDER_ACTION_NAME_INCREMENT = "positiveUnitIncrement";
 
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    protected static final String SLIDER_ACTION_NAME_DECREMENT = "negativeUnitIncrement";
 
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    public static void installMouseWheelSupport(final JSpinner spinner) {
 
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        MouseWheelListener l = new MouseWheelListener() {
 
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            public void mouseWheelMoved(MouseWheelEvent e) {
 
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                if (!spinner.isEnabled()) {
 
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                    return;
 
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                }
 
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                int rotation = e.getWheelRotation();
 
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                if (rotation < 0) {
 
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                    Action action = spinner.getActionMap().get(SPINNER_ACTION_NAME_INCREMENT);
 
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                    if (action != null) {
 
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                        action.actionPerformed(new ActionEvent(e.getSource(), 0, SPINNER_ACTION_NAME_INCREMENT));
 
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                    }
 
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                } else if (rotation > 0) {
 
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                    Action action = spinner.getActionMap().get(SPINNER_ACTION_NAME_DECREMENT);
 
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                    if (action != null) {
 
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                        action.actionPerformed(new ActionEvent(e.getSource(), 0, SPINNER_ACTION_NAME_DECREMENT));
 
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                    }
 
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                }
 
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            }
 
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        };
 
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        spinner.addMouseWheelListener(l);
 
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        spinner.putClientProperty(CLIENT_PROPERTY_MOUSE_WHEEL_LISTENER, l);
 
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    }
 
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    public static void installMouseWheelSupport(final JSlider slider) {
 
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        MouseWheelListener l = new MouseWheelListener() {
 
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            public void mouseWheelMoved(MouseWheelEvent e) {
 
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                if (!slider.isEnabled()) {
 
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                    return;
 
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                }
 
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                int rotation = e.getWheelRotation();
 
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                if (rotation < 0) {
 
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                    Action action = slider.getActionMap().get(SLIDER_ACTION_NAME_INCREMENT);
 
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                    if (action != null) {
 
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                        action.actionPerformed(new ActionEvent(e.getSource(), 0, SLIDER_ACTION_NAME_INCREMENT));
 
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                    }
 
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                } else if (rotation > 0) {
 
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                    Action action = slider.getActionMap().get(SLIDER_ACTION_NAME_DECREMENT);
 
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                    if (action != null) {
 
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                        action.actionPerformed(new ActionEvent(e.getSource(), 0, SLIDER_ACTION_NAME_DECREMENT));
 
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                    }
 
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                }
 
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            }
 
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        };
 
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        slider.addMouseWheelListener(l);
 
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        slider.putClientProperty(CLIENT_PROPERTY_MOUSE_WHEEL_LISTENER, l);
 
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    }
 
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    public static <T extends JComponent> void uninstallMouseWheelSupport(final T component) {
 
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        MouseWheelListener l = (MouseWheelListener) component.getClientProperty(CLIENT_PROPERTY_MOUSE_WHEEL_LISTENER);
 
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        if (l != null) {
 
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            component.removeMouseWheelListener(l);
 
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        }
 
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    }
 
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}