eu.numberfour.n4js.ui.preferences.MutableProgressMonitorDialog.java Source code

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Here is the source code for eu.numberfour.n4js.ui.preferences.MutableProgressMonitorDialog.java

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/**
 * Copyright (c) 2016 NumberFour AG.
 * 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:
 *   NumberFour AG - Initial API and implementation
 */
package eu.numberfour.n4js.ui.preferences;

import java.lang.reflect.InvocationTargetException;

import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.ProgressMonitorWrapper;
import org.eclipse.jface.dialogs.ProgressMonitorDialog;
import org.eclipse.jface.operation.IRunnableWithProgress;
import org.eclipse.swt.widgets.Shell;

import eu.numberfour.n4js.utils.Cancelable;

/**
 * Progress monitor dialog implementation which cancel button state can be programmatically mutated.
 */
/* default */class MutableProgressMonitorDialog extends ProgressMonitorDialog {

    /**
     * Creates a new dialog instance with the parent shell.
     *
     * @param parent
     *            the parent of the dialog.
     */
    public MutableProgressMonitorDialog(final Shell parent) {
        super(parent);
    }

    @Override
    public void run(final boolean fork, final boolean cancelable, final IRunnableWithProgress runnable)
            throws InvocationTargetException, InterruptedException {

        super.run(fork, cancelable,
                monitor -> runnable.run(new CancelableProgressMonitor(monitor, MutableProgressMonitorDialog.this)));
    }

    /**
     * Cancelable progress monitor that mutates the state of the cancel button in the container
     * {@link ProgressMonitorDialog progress monitor dialog}.
     */
    private static final class CancelableProgressMonitor extends ProgressMonitorWrapper implements Cancelable {

        private final MutableProgressMonitorDialog dialog;

        private CancelableProgressMonitor(final IProgressMonitor monitor,
                final MutableProgressMonitorDialog dialog) {
            super(monitor);
            this.dialog = dialog;
        }

        @Override
        public boolean isCancelable() {
            return dialog.enableCancelButton;
        }

        @Override
        public void setCancelable(final boolean b) {
            dialog.setCancelable(b);
        }

    }

}