de.fhg.igd.swingrcp.ActionAdapter.java Source code

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Here is the source code for de.fhg.igd.swingrcp.ActionAdapter.java

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/*
 * Copyright (c) 2016 Fraunhofer IGD
 * 
 * All rights reserved. This program and the accompanying materials are made
 * available under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 3 of the License,
 * or (at your option) any later version.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution. If not, see <http://www.gnu.org/licenses/>.
 * 
 * Contributors:
 *     Fraunhofer IGD <http://www.igd.fraunhofer.de/>
 */
package de.fhg.igd.swingrcp;

import java.awt.event.ActionEvent;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;

import javax.swing.ImageIcon;
import javax.swing.SwingUtilities;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.swt.widgets.Display;

/**
 * SWT ActionAdapter for Swing Actions
 *
 * @author Simon Templer
 */
public class ActionAdapter extends Action implements PropertyChangeListener {

    private static final Log log = LogFactory.getLog(ActionAdapter.class);

    private final javax.swing.Action action;

    /**
     * The display
     */
    protected final Display display;

    /**
     * Creates an ActionAdapter
     * 
     * @param action the internal swing action
     */
    public ActionAdapter(final javax.swing.Action action) {
        this(action, Action.AS_PUSH_BUTTON);
    }

    /**
     * Creates an ActionAdapter
     * 
     * @param action the internal swing action
     * @param style the action style
     */
    public ActionAdapter(final javax.swing.Action action, int style) {
        super(null, style);

        if (action == null)
            throw new IllegalArgumentException();

        this.action = action;

        this.display = Display.getCurrent();
        if (this.display == null)
            throw new IllegalArgumentException("ActionAdapter has to be created in display thread");

        action.addPropertyChangeListener(this);

        loadImage();
    }

    /**
     * Set the actions icon as {@link ImageDescriptor} if possible
     */
    @SuppressWarnings("deprecation")
    private void loadImage() {
        Object icon = action.getValue(javax.swing.Action.SMALL_ICON);

        if (icon instanceof ImageIcon) {
            try {
                setImageDescriptor(
                        ImageDescriptor.createFromImageData(SwingRCPUtilities.convertToSWT((ImageIcon) icon)));
            } catch (Exception e) {
                log.warn("Error converting action icon", e);
            }
        }
    }

    /**
     * @see Action#getDescription()
     */
    @Override
    public String getDescription() {
        return (String) action.getValue(javax.swing.Action.LONG_DESCRIPTION);
    }

    /**
     * @see Action#getText()
     */
    @Override
    public String getText() {
        Object text = action.getValue(javax.swing.Action.NAME);
        if (text == null)
            return null;
        else
            return text.toString();
    }

    /**
     * @see Action#getToolTipText()
     */
    @Override
    public String getToolTipText() {
        return (String) action.getValue(javax.swing.Action.SHORT_DESCRIPTION);
    }

    /**
     * @see Action#isEnabled()
     */
    @Override
    public boolean isEnabled() {
        return action.isEnabled();
    }

    /**
     * @see Action#setEnabled(boolean)
     */
    @Override
    public void setEnabled(final boolean enabled) {
        final boolean old = isEnabled();

        action.setEnabled(enabled);

        display.asyncExec(new Runnable() {

            @Override
            public void run() {
                firePropertyChange("enabled", old, enabled);
            }

        });
    }

    /**
     * @see Action#setText(java.lang.String)
     */
    @Override
    public void setText(final String text) {
        if (action != null) {
            final String old = getText();

            action.putValue(javax.swing.Action.NAME, text);

            display.asyncExec(new Runnable() {

                @Override
                public void run() {
                    firePropertyChange("text", old, text);
                }

            });
        }
    }

    /**
     * @see Action#setToolTipText(java.lang.String)
     */
    @Override
    public void setToolTipText(final String toolTipText) {
        final String old = getToolTipText();

        action.putValue(javax.swing.Action.SHORT_DESCRIPTION, toolTipText);

        display.asyncExec(new Runnable() {

            @Override
            public void run() {
                firePropertyChange(Action.TOOL_TIP_TEXT, old, toolTipText);
            }

        });
    }

    /**
     * @see Action#run()
     */
    @Override
    public void run() {
        // execute action
        SwingUtilities.invokeLater(new Runnable() {

            /**
             * @see Runnable#run()
             */
            @Override
            public void run() {
                action.actionPerformed(new ActionEvent(this, ActionEvent.ACTION_PERFORMED, null));
            }

        });
    }

    /**
     * @see PropertyChangeListener#propertyChange(PropertyChangeEvent)
     */
    @Override
    public void propertyChange(final PropertyChangeEvent evt) {
        // propagate property change event
        // -> enabled
        if (evt.getPropertyName().equals("enabled"))
            display.asyncExec(new Runnable() {

                @Override
                public void run() {
                    firePropertyChange(Action.ENABLED, evt.getOldValue(), evt.getNewValue());
                }

            });
    }

}