org.hpccsystems.internal.ECLLaunchConfigurationTab.java Source code

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Here is the source code for org.hpccsystems.internal.ECLLaunchConfigurationTab.java

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/*******************************************************************************
 * Copyright (c) 2011 HPCC Systems.
 * 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:
 *     HPCC Systems - initial API and implementation
 ******************************************************************************/
package org.hpccsystems.internal;

import java.util.HashMap;

import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.debug.ui.AbstractLaunchConfigurationTab;
import org.eclipse.jface.preference.FieldEditor;
import org.eclipse.swt.widgets.Group;
import org.eclipse.ui.progress.WorkbenchJob;

public abstract class ECLLaunchConfigurationTab extends AbstractLaunchConfigurationTab {
    private Job fRereshJob;

    class FieldEditorRef {
        Group parent;
        FieldEditor item;

        FieldEditorRef(Group parent, FieldEditor item) {
            this.parent = parent;
            this.item = item;
        }
    }

    protected HashMap<String, FieldEditorRef> fieldMap;

    public ECLLaunchConfigurationTab() {
        fieldMap = new HashMap<String, FieldEditorRef>();
    }

    private Job getUpdateJob() {
        if (fRereshJob == null) {
            fRereshJob = createUpdateJob();
            fRereshJob.setSystem(true);
        }
        return fRereshJob;
    }

    @Override
    protected void scheduleUpdateJob() {
        Job job = getUpdateJob();
        job.cancel(); // cancel existing job
        job.schedule(getUpdateJobDelay());
    }

    @Override
    protected Job createUpdateJob() {
        return new WorkbenchJob(getControl().getDisplay(), "Update LCD") { //$NON-NLS-1$
            @Override
            public IStatus runInUIThread(IProgressMonitor monitor) {
                if (!getControl().isDisposed()) {
                    updateLaunchConfigurationDialog();
                }
                return Status.OK_STATUS;
            }

            @Override
            public boolean shouldRun() {
                return !getControl().isDisposed();
            }
        };
    }

    @Override
    protected long getUpdateJobDelay() {
        return 200;
    }

    protected void refreshEnabled(String id, boolean enabled) {
        FieldEditorRef ref = fieldMap.get(id);
        ref.item.setEnabled(enabled, ref.parent);
    }

    protected void addField(Group parent, FieldEditor field) {
        fieldMap.put(field.getPreferenceName(), new FieldEditorRef(parent, field));
    }
}