Java example source code file (ControlFlowTopComponent.java)

This example Java source code file (ControlFlowTopComponent.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

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Java - Java tags/keywords

awt, borderlayout, controlflowscene, controlflowtopcomponent, ctl_controlflowtopcomponent, gui, hint_controlflowtopcomponent, inputgraphprovider, lookuplistener, object, override, preferred_id, resolvablehelper, runnable, string, swing

The ControlFlowTopComponent.java Java example source code

/*
 * Copyright (c) 2008, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code 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 General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 *
 */
package com.sun.hotspot.igv.controlflow;

import com.sun.hotspot.igv.data.InputGraph;
import com.sun.hotspot.igv.data.services.InputGraphProvider;
import java.awt.BorderLayout;
import java.io.Serializable;
import javax.swing.JScrollPane;
import javax.swing.SwingUtilities;
import org.openide.ErrorManager;
import org.openide.util.Lookup;
import org.openide.util.LookupEvent;
import org.openide.util.LookupListener;
import org.openide.util.NbBundle;
import org.openide.util.Utilities;
import org.openide.windows.TopComponent;
import org.openide.windows.WindowManager;

/**
 *
 * @author Thomas Wuerthinger
 */
final class ControlFlowTopComponent extends TopComponent implements LookupListener {

    private static ControlFlowTopComponent instance;
    private Lookup.Result result = null;
    private static final String PREFERRED_ID = "ControlFlowTopComponent";
    private ControlFlowScene scene;

    private ControlFlowTopComponent() {
        initComponents();
        setName(NbBundle.getMessage(ControlFlowTopComponent.class, "CTL_ControlFlowTopComponent"));
        setToolTipText(NbBundle.getMessage(ControlFlowTopComponent.class, "HINT_ControlFlowTopComponent"));

        scene = new ControlFlowScene();
        this.setLayout(new BorderLayout());
        this.associateLookup(scene.getLookup());


        JScrollPane panel = new JScrollPane(scene.createView());
        this.add(panel, BorderLayout.CENTER);
    }

    @Override
    public void requestFocus() {
        super.requestFocus();
        scene.getView().requestFocus();
    }

    @Override
    public boolean requestFocusInWindow() {
        super.requestFocusInWindow();
        return scene.getView().requestFocusInWindow();
    }

    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    // <editor-fold defaultstate="collapsed" desc=" Generated Code ">//GEN-BEGIN:initComponents
    private void initComponents() {

        org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(this);
        this.setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(0, 400, Short.MAX_VALUE)
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(0, 300, Short.MAX_VALUE)
        );
    }// </editor-fold>//GEN-END:initComponents
    // Variables declaration - do not modify//GEN-BEGIN:variables
    // End of variables declaration//GEN-END:variables
    /**
     * Gets default instance. Do not use directly: reserved for *.settings files only,
     * i.e. deserialization routines; otherwise you could get a non-deserialized instance.
     * To obtain the singleton instance, use {@link findInstance}.
     */
    public static synchronized ControlFlowTopComponent getDefault() {
        if (instance == null) {
            instance = new ControlFlowTopComponent();
        }
        return instance;
    }

    /**
     * Obtain the ControlFlowTopComponent instance. Never call {@link #getDefault} directly!
     */
    public static synchronized ControlFlowTopComponent findInstance() {
        TopComponent win = WindowManager.getDefault().findTopComponent(PREFERRED_ID);
        if (win == null) {
            ErrorManager.getDefault().log(ErrorManager.WARNING, "Cannot find ControlFlow component. It will not be located properly in the window system.");
            return getDefault();
        }
        if (win instanceof ControlFlowTopComponent) {
            return (ControlFlowTopComponent) win;
        }
        ErrorManager.getDefault().log(ErrorManager.WARNING, "There seem to be multiple components with the '" + PREFERRED_ID + "' ID. That is a potential source of errors and unexpected behavior.");
        return getDefault();
    }

    @Override
    public int getPersistenceType() {
        return TopComponent.PERSISTENCE_ALWAYS;
    }

    @Override
    public void componentOpened() {
        Lookup.Template tpl = new Lookup.Template(Object.class);
        result = Utilities.actionsGlobalContext().lookup(tpl);
        result.addLookupListener(this);
    }

    @Override
    public void componentClosed() {
        result.removeLookupListener(this);
        result = null;
    }

    public void resultChanged(LookupEvent lookupEvent) {

        final InputGraphProvider p = Lookup.getDefault().lookup(InputGraphProvider.class);
        if (p != null) {
            SwingUtilities.invokeLater(new Runnable() {
                public void run() {
            InputGraph g = p.getGraph();
            if (g != null) {
                scene.setGraph(g);
            }
        }
            });
        }
    }

    @Override
    public Object writeReplace() {
        return new ResolvableHelper();
    }

    @Override
    protected String preferredID() {
        return PREFERRED_ID;
    }

    @Override
    public void requestActive() {
        scene.getView().requestFocusInWindow();
        super.requestActive();
    }

    final static class ResolvableHelper implements Serializable {

        private static final long serialVersionUID = 1L;

        public Object readResolve() {
            return ControlFlowTopComponent.getDefault();
        }
    }
}