org.gumtree.gumnix.sics.ui.widgets.SicsInterruptGadgetSummary.java Source code

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Here is the source code for org.gumtree.gumnix.sics.ui.widgets.SicsInterruptGadgetSummary.java

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/*******************************************************************************
 * Copyright (c) 2007 Australian Nuclear Science and Technology Organisation.
 * 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
 *
 * Contributors:
 *     Tony Lam (Bragg Institute) - initial API and implementation
 *******************************************************************************/

package org.gumtree.gumnix.sics.ui.widgets;

import org.eclipse.jface.layout.GridDataFactory;
import org.eclipse.jface.layout.GridLayoutFactory;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.util.SafeRunnable;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.MouseAdapter;
import org.eclipse.swt.events.MouseEvent;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.gumtree.gumnix.sics.core.SicsCore;
import org.gumtree.gumnix.sics.internal.ui.Activator;
import org.gumtree.gumnix.sics.internal.ui.SicsInterruptView;
import org.gumtree.gumnix.sics.io.ISicsProxyListener;
import org.gumtree.gumnix.sics.io.SicsIOException;
import org.gumtree.gumnix.sics.io.SicsProxyListenerAdapter;
import org.gumtree.ui.util.SafeUIRunner;
import org.gumtree.ui.util.forms.FormControlWidget;
import org.gumtree.widgets.swt.util.UIResourceManager;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class SicsInterruptGadgetSummary extends FormControlWidget {

    private static Logger logger = LoggerFactory.getLogger(SicsInterruptView.class);

    private ISicsProxyListener proxyListener;

    private Button button;

    public SicsInterruptGadgetSummary(Composite parent, int style) {
        super(parent, style);
    }

    public void afterParametersSet() {
        GridLayoutFactory.swtDefaults().applyTo(this);
        UIResourceManager resourceManager = new UIResourceManager(Activator.PLUGIN_ID, this);
        button = new Button(this, SWT.NONE);
        button.setImage(resourceManager.createImage("icons/Stop-Normal-Red-16x16.png"));
        button.setText("Interrupt");
        button.setBackground(getBackground());
        button.setFont(JFaceResources.getFontRegistry().getBold(JFaceResources.DEFAULT_FONT));
        button.addMouseListener(new MouseAdapter() {
            public void mouseDown(MouseEvent e) {
                try {
                    // Action: interrupt SICS
                    SicsCore.getSicsController().interrupt();
                } catch (SicsIOException e1) {
                    logger.error("Failed to send interrupt.", e);
                }
            }
        });
        GridDataFactory.swtDefaults().align(SWT.FILL, SWT.CENTER).grab(true, false).applyTo(button);
        this.layout(true, true);
        // Set UI status
        updateUI();
        // Register proxy listener
        proxyListener = new SicsProxyListenerAdapter() {
            public void proxyConnected() {
                updateUI();
            }

            public void proxyDisconnected() {
                updateUI();
            }
        };
        SicsCore.getDefaultProxy().addProxyListener(proxyListener);
    }

    public void widgetDispose() {
        if (proxyListener != null) {
            SicsCore.getDefaultProxy().removeProxyListener(proxyListener);
            proxyListener = null;
        }
        button = null;
    }

    private void updateUI() {
        if (button != null && !button.isDisposed()) {
            SafeUIRunner.asyncExec(new SafeRunnable() {
                public void run() throws Exception {
                    button.setEnabled(SicsCore.getDefaultProxy().isConnected());
                }
            });
        }
    }

}