hotspot/src/share/tools/IdealGraphVisualizer/ControlFlow/src/com/sun/hotspot/igv/controlflow/ControlFlowTopComponent.java
author never
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6718676: putback for 6604014 is incomplete Reviewed-by: kvn, jrose
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/*
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 * Copyright 2008 Sun Microsystems, Inc.  All Rights Reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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 * CA 95054 USA or visit www.sun.com if you need additional information or
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 * have any questions.
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 *
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 */
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package com.sun.hotspot.igv.controlflow;
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import com.sun.hotspot.igv.data.InputGraph;
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import com.sun.hotspot.igv.data.services.InputGraphProvider;
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import java.awt.BorderLayout;
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import java.io.Serializable;
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import javax.swing.JScrollPane;
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import org.openide.ErrorManager;
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import org.openide.util.Lookup;
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import org.openide.util.LookupEvent;
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import org.openide.util.LookupListener;
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import org.openide.util.NbBundle;
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import org.openide.util.Utilities;
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import org.openide.windows.TopComponent;
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import org.openide.windows.WindowManager;
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/**
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 *
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 * @author Thomas Wuerthinger
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 */
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final class ControlFlowTopComponent extends TopComponent implements LookupListener {
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    private static ControlFlowTopComponent instance;
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    private Lookup.Result result = null;
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    private static final String PREFERRED_ID = "ControlFlowTopComponent";
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    private ControlFlowScene scene;
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    private ControlFlowTopComponent() {
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        initComponents();
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        setName(NbBundle.getMessage(ControlFlowTopComponent.class, "CTL_ControlFlowTopComponent"));
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        setToolTipText(NbBundle.getMessage(ControlFlowTopComponent.class, "HINT_ControlFlowTopComponent"));
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        scene = new ControlFlowScene();
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        this.setLayout(new BorderLayout());
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        this.associateLookup(scene.getLookup());
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        JScrollPane panel = new JScrollPane(scene.createView());
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        this.add(panel, BorderLayout.CENTER);
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    }
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    @Override
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    public void requestFocus() {
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        super.requestFocus();
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        scene.getView().requestFocus();
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    }
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    @Override
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    public boolean requestFocusInWindow() {
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        super.requestFocusInWindow();
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        return scene.getView().requestFocusInWindow();
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    }
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    /** This method is called from within the constructor to
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     * initialize the form.
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     * WARNING: Do NOT modify this code. The content of this method is
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     * always regenerated by the Form Editor.
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     */
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    // <editor-fold defaultstate="collapsed" desc=" Generated Code ">//GEN-BEGIN:initComponents
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    private void initComponents() {
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        org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(this);
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        this.setLayout(layout);
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        layout.setHorizontalGroup(
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            layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
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            .add(0, 400, Short.MAX_VALUE)
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        );
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        layout.setVerticalGroup(
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            layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
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            .add(0, 300, Short.MAX_VALUE)
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        );
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    }// </editor-fold>//GEN-END:initComponents
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    // Variables declaration - do not modify//GEN-BEGIN:variables
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    // End of variables declaration//GEN-END:variables
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    /**
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     * Gets default instance. Do not use directly: reserved for *.settings files only,
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     * i.e. deserialization routines; otherwise you could get a non-deserialized instance.
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     * To obtain the singleton instance, use {@link findInstance}.
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     */
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    public static synchronized ControlFlowTopComponent getDefault() {
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        if (instance == null) {
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            instance = new ControlFlowTopComponent();
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        }
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        return instance;
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    }
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    /**
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     * Obtain the ControlFlowTopComponent instance. Never call {@link #getDefault} directly!
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     */
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    public static synchronized ControlFlowTopComponent findInstance() {
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        TopComponent win = WindowManager.getDefault().findTopComponent(PREFERRED_ID);
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        if (win == null) {
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            ErrorManager.getDefault().log(ErrorManager.WARNING, "Cannot find ControlFlow component. It will not be located properly in the window system.");
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            return getDefault();
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        }
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        if (win instanceof ControlFlowTopComponent) {
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            return (ControlFlowTopComponent) win;
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        }
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        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.");
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        return getDefault();
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    }
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    @Override
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    public int getPersistenceType() {
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        return TopComponent.PERSISTENCE_ALWAYS;
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    }
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    @Override
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    public void componentOpened() {
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        Lookup.Template tpl = new Lookup.Template(Object.class);
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        result = Utilities.actionsGlobalContext().lookup(tpl);
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        result.addLookupListener(this);
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    }
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    @Override
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    public void componentClosed() {
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        result.removeLookupListener(this);
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        result = null;
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    }
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    public void resultChanged(LookupEvent lookupEvent) {
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        InputGraphProvider p = Lookup.getDefault().lookup(InputGraphProvider.class);
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        if (p != null) {
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            InputGraph g = p.getGraph();
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            if (g != null) {
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                scene.setGraph(g);
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            }
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        }
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    }
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    @Override
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    public Object writeReplace() {
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        return new ResolvableHelper();
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    }
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    @Override
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    protected String preferredID() {
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        return PREFERRED_ID;
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    }
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    @Override
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    public void requestActive() {
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        scene.getView().requestFocusInWindow();
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        super.requestActive();
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    }
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    final static class ResolvableHelper implements Serializable {
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        private static final long serialVersionUID = 1L;
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        public Object readResolve() {
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            return ControlFlowTopComponent.getDefault();
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        }
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    }
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}