PreviewPanel.java

/*
 *    PreviewPanel.java
 *    Copyright (C) 2007 University of Waikato, Hamilton, New Zealand
 *    @author Richard Kirkby (rkirkby@cs.waikato.ac.nz)
 *
 *    This program is free software; you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation; either version 2 of the License, or
 *    (at your option) any later version.
 *
 *    This program 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 for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with this program; if not, write to the Free Software
 *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
package tr.gov.ulakbim.jDenetX.gui;

import tr.gov.ulakbim.jDenetX.core.StringUtils;
import tr.gov.ulakbim.jDenetX.tasks.ResultPreviewListener;
import tr.gov.ulakbim.jDenetX.tasks.TaskThread;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class PreviewPanel extends JPanel implements ResultPreviewListener {

    private static final long serialVersionUID = 1L;

    public static final String[] autoFreqStrings = {"never", "every second",
            "every 5 seconds", "every 10 seconds", "every 30 seconds",
            "every minute"};

    public static final int[] autoFreqTimeSecs = {0, 1, 5, 10, 30, 60};

    protected TaskThread previewedThread;

    protected JLabel previewLabel = new JLabel("No preview available");

    protected JButton refreshButton = new JButton("Refresh");

    protected JLabel autoRefreshLabel = new JLabel("Auto refresh: ");

    protected JComboBox autoRefreshComboBox = new JComboBox(autoFreqStrings);

    protected TextViewerPanel textViewerPanel = new TextViewerPanel();

    protected javax.swing.Timer autoRefreshTimer;

    public PreviewPanel() {
        this.autoRefreshComboBox.setSelectedIndex(1); // default to 1 sec
        JPanel controlPanel = new JPanel();
        controlPanel.add(this.previewLabel);
        controlPanel.add(this.refreshButton);
        controlPanel.add(this.autoRefreshLabel);
        controlPanel.add(this.autoRefreshComboBox);
        setLayout(new BorderLayout());
        add(controlPanel, BorderLayout.NORTH);
        add(this.textViewerPanel, BorderLayout.CENTER);
        this.refreshButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {
                refresh();
            }
        });
        this.autoRefreshTimer = new javax.swing.Timer(1000,
                new ActionListener() {
                    public void actionPerformed(ActionEvent e) {
                        refresh();
                    }
                });
        this.autoRefreshComboBox.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {
                updateAutoRefreshTimer();
            }
        });
        setTaskThreadToPreview(null);
    }

    public void refresh() {
        if (this.previewedThread != null) {
            if (this.previewedThread.isComplete()) {
                setLatestPreview(null);
                disableRefresh();
            } else {
                this.previewedThread.getPreview(PreviewPanel.this);
            }
        }
    }

    public void setTaskThreadToPreview(TaskThread thread) {
        this.previewedThread = thread;
        setLatestPreview(thread != null ? thread.getLatestResultPreview()
                : null);
        if (thread == null) {
            disableRefresh();
        } else if (!thread.isComplete()) {
            enableRefresh();
        }
    }

    public void setLatestPreview(Object preview) {
        if ((this.previewedThread != null) && this.previewedThread.isComplete()) {
            this.previewLabel.setText("Final result");
            Object finalResult = this.previewedThread.getFinalResult();
            this.textViewerPanel.setText(finalResult != null ? finalResult
                    .toString() : null);
            disableRefresh();
        } else {
            double grabTime = this.previewedThread != null ? this.previewedThread
                    .getLatestPreviewGrabTimeSeconds()
                    : 0.0;
            String grabString = grabTime > 0.0 ? (" ("
                    + StringUtils.secondsToDHMSString(grabTime) + ")") : "";
            this.textViewerPanel.setText(preview != null ? preview.toString()
                    : null);
            if (preview == null) {
                this.previewLabel.setText("No preview available" + grabString);
            } else {
                this.previewLabel.setText("Preview" + grabString);
            }
        }
    }

    public void updateAutoRefreshTimer() {
        int autoDelay = autoFreqTimeSecs[this.autoRefreshComboBox
                .getSelectedIndex()];
        if (autoDelay > 0) {
            if (this.autoRefreshTimer.isRunning()) {
                this.autoRefreshTimer.stop();
            }
            this.autoRefreshTimer.setDelay(autoDelay * 1000);
            this.autoRefreshTimer.start();
        } else {
            this.autoRefreshTimer.stop();
        }
    }

    public void disableRefresh() {
        this.refreshButton.setEnabled(false);
        this.autoRefreshLabel.setEnabled(false);
        this.autoRefreshComboBox.setEnabled(false);
        this.autoRefreshTimer.stop();
    }

    public void enableRefresh() {
        this.refreshButton.setEnabled(true);
        this.autoRefreshLabel.setEnabled(true);
        this.autoRefreshComboBox.setEnabled(true);
        updateAutoRefreshTimer();
    }

    public void latestPreviewChanged() {
        setTaskThreadToPreview(this.previewedThread);
    }

}