org.polymap.p4.process.ProcessProgressMonitor.java Source code

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Here is the source code for org.polymap.p4.process.ProcessProgressMonitor.java

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/* 
 * polymap.org
 * Copyright (C) 2017, the @authors. All rights reserved.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 3.0 of
 * the License, or (at your option) any later version.
 *
 * This software 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
 * Lesser General Public License for more details.
 */
package org.polymap.p4.process;

import org.jgrasstools.gears.libs.monitor.DummyProgressMonitor;
import org.jgrasstools.gears.libs.monitor.IJGTProgressMonitor;

import org.apache.commons.lang3.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.google.common.base.Joiner;

import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;

import org.polymap.core.runtime.Timer;
import org.polymap.core.ui.FormDataFactory;
import org.polymap.core.ui.FormLayoutFactory;

import org.polymap.rhei.batik.BatikPlugin;

/**
 * 
 *
 * @author Falko Brutigam
 */
public class ProcessProgressMonitor extends DummyProgressMonitor implements IJGTProgressMonitor {

    private static final Log log = LogFactory.getLog(ProcessProgressMonitor.class);

    private Label msg;

    private String taskName;

    private String subTaskName;

    private volatile int total = UNKNOWN;

    private volatile int worked;

    private Timer updated = new Timer();

    private volatile boolean canceled;

    private Display display;

    public ProcessProgressMonitor(Composite parent) {
        this.display = parent.getDisplay();

        parent.setLayout(FormLayoutFactory.defaults().margins(0, 30).create());
        Label wheel = new Label(parent, SWT.CENTER);
        wheel.setLayoutData(FormDataFactory.filled().noBottom().create());
        wheel.setText("Crunching data...");
        wheel.setImage(BatikPlugin.images().image("resources/icons/loading24.gif"));

        msg = new Label(parent, SWT.CENTER);
        msg.setLayoutData(FormDataFactory.filled().top(wheel, 10).create());

        taskName = "Start processing";
        update(false);
    }

    protected void update(boolean throttle) {
        if (throttle && updated.elapsedTime() < 1000) {
            return;
        }
        updated.start();
        display.asyncExec(() -> {
            if (msg != null && !msg.isDisposed()) {
                String s = Joiner.on(" ").skipNulls().join(StringUtils.removeEnd(taskName, "..."), " ...",
                        subTaskName);
                if (total != UNKNOWN) {
                    double percent = 100d / total * worked;
                    s += " (" + (int) percent + "%)";
                }
                msg.setText(s);
            }
        });
    }

    @Override
    public boolean isCanceled() {
        return canceled;
    }

    @Override
    public void setCanceled(boolean canceled) {
        this.canceled = canceled;
    }

    @Override
    public void beginTask(String name, int totalWork) {
        this.taskName = name;
        this.total = totalWork;
        update(false);
    }

    @Override
    public void setTaskName(String name) {
        this.taskName = name;
        update(false);
    }

    @Override
    public void subTask(String name) {
        this.subTaskName = name;
        update(true);
    }

    @Override
    public void worked(int work) {
        worked += work;
        update(true);
    }

}