com.ibm.etools.mft.samples.scribble.ScribbleDemoDriver.java Source code

Introduction

Here is the source code for com.ibm.etools.mft.samples.scribble.ScribbleDemoDriver.java

Source

/*
Sample program for use with IBM Integration Bus
 Copyright International Business Machines Corporation 2013
Licensed Materials - Property of IBM
*/

package com.ibm.etools.mft.samples.scribble;

import java.io.*;

import org.eclipse.jface.dialogs.*;
import org.eclipse.jface.resource.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.widgets.*;

/**
 * @author cmarkes
 *
 * To change this generated comment edit the template variable "typecomment":
 * Window>Preferences>Java>Templates.
 * To enable and disable the creation of type comments go to
 * Window>Preferences>Java>Code Generation.
 */

public class ScribbleDemoDriver implements Runnable {
    public static final String copyright = "Licensed Material - Property of IBM 5724-E11, 5724-E26 (c)Copyright IBM Corp. 2002, 2008 - All Rights Reserved. US Government Users Restricted Rights - Use,duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp."; //$NON-NLS-1$
    final ScribblePublisher publisher;
    final ImageData imageData;
    final Display display;

    public ScribbleDemoDriver(ScribblePublisher publisher, String filename) throws IOException {
        this.publisher = publisher;
        this.imageData = ImageDescriptor.createFromFile(getClass(), filename).getImageData();
        this.display = publisher.shell.getDisplay();
    }

    public void run() {

        while (publisher.demo == this) {
            clearAndPublish();

            byte[] pixels = new byte[imageData.width];

            for (int y = 0; y < imageData.height; y++) {
                imageData.getPixels(0, y, pixels.length, pixels, 0);

                int start = -1;

                for (int x = 0; x < pixels.length && publisher.demo == this; x++) {
                    if (start != -1 && pixels[x] != 0) {
                        drawAndPublish(start, y, x - 1, y);
                        start = -1;
                    } else if (start == -1 && pixels[x] == 0) {
                        start = x;
                    }
                }

                if (start != -1) {
                    drawAndPublish(start, y, pixels.length - 1, y);
                }
            }

            try {
                Thread.sleep(2500);
            }

            catch (InterruptedException ie) {
            }
        }
    }

    void clearAndPublish() {
        display.syncExec(new Runnable() {
            public void run() {
                try {
                    publisher.canvas.clear();
                    publisher.publishClear();
                }

                catch (Exception e) {
                    publisher.stopDemo();
                    MessageDialog.openError(publisher.shell, "Scribble Demo",
                            "The scribble demo has been stopped.\n\nReason: " + e.getMessage());
                }
            }
        });
    }

    void drawAndPublish(final int x1, final int y1, final int x2, final int y2) {
        display.syncExec(new Runnable() {
            public void run() {
                try {
                    publisher.canvas.draw(x1, y1, x2, y2);
                    publisher.publishLine(x1, y1, x2, y2);
                }

                catch (Exception e) {
                    publisher.stopDemo();
                    MessageDialog.openError(publisher.shell, "Scribble Demo",
                            "The scribble demo has been stopped.\n\nReason: " + e.getMessage());
                }
            }
        });
    }
}