Firebug Lite for SWT Browser on Windows

Recently I came across this question on stackoverflow 'Eclipse swt browser and firebug lite'. The solution seemed very obvious. I answered the question there also, you can always upvote it ;).

The output:

 

The code for the same is as follows:

import org.eclipse.swt.SWT;
import org.eclipse.swt.browser.Browser;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

public class FirebugLite 
{
 public static void main(String[] args) {
  new FirebugLite().start();
 }
 
 public void start()
 {
  Display display = new Display();
  Shell shell = new Shell(display);
  shell.setLayout(new GridLayout(1, false));
  GridData gridData = new GridData(SWT.FILL, SWT.FILL, true, true);
  gridData.widthHint = SWT.DEFAULT;
  gridData.heightHint = SWT.DEFAULT;
  shell.setLayoutData(gridData);
  shell.setText("Firebug Lite for SWT ;)");
  
  final Browser browser = new Browser(shell, SWT.NONE);
  GridData gridData2 = new GridData(SWT.FILL, SWT.FILL, true, true);
  gridData2.widthHint = SWT.DEFAULT;
  gridData2.heightHint = SWT.DEFAULT;
  browser.setLayoutData(gridData2);
  
  Button button = new Button(shell, SWT.PUSH);
  button.setLayoutData(new GridData(SWT.CENTER, SWT.CENTER, false, false));
  button.setText("Install");
  button.addSelectionListener(new SelectionAdapter() {
   public void widgetSelected(SelectionEvent e) {
    browser.setUrl("javascript:(function(F,i,r,e,b,u,g,L,I,T,E){if(F.getElementById(b))return;E=F[i+'NS']&&F.documentElement.namespaceURI;E=E?F[i+'NS'](E,'script'):F[i]('script');E[r]('id',b);E[r]('src',I+g+T);E[r](b,u);(F[e]('head')[0]||F[e]('body')[0]).appendChild(E);E=new%20Image;E[r]('src',I+L);})(document,'createElement','setAttribute','getElementsByTagName','FirebugLite','4','firebug-lite.js','releases/lite/latest/skin/xp/sprite.png','https://getfirebug.com/','#startOpened');");
   }
  });
  
  browser.setUrl("http://stackoverflow.com/questions/12003602/eclipse-swt-browser-and-firebug-lite");

  shell.open();
  while (!shell.isDisposed()) {
   if (!display.readAndDispatch())
    display.sleep();
  }
  display.dispose();
 }
}

SWT Browser and Image Capture

Recently I was playing with the SWT-COM bridge and its Win32 APIs. Believe me or not, but the SWT Browser is the best SWT based UI control I have seen (you can argue but without any success). 

One of the experimental feature I tried accomplishing was to print the full HTML page as Image, and the result was superb !!

See the below images for the embedded browser control and the output of the image capturing utility !! Cool right ;)

Modified Browser Control:

Captured Image:

Atlapp and secure atl !!

After upgrading to VS2008, I started getting errors for lstrlenA, size_t, and lstrcpynA. My "include directories" settings are exactly the same as my old VS2005, and if I open the project in VS2005, everything compiles just fine. So what is the fix for this problem??

And the fix is really simple, before including atlapp.h, just define:

#define _SECURE_ATL 1 

SWT - Capturing Control Screen-Shot

SWT code for capturing control screen-shot.

public class ScreenCaptureTest 
{
 public static void main(String[] args) 
 {
  String[] names  = {"Harry", "Sally", "Jhon", "Tim", "Scott"};
  String[] msg = {"Hello World!", "Today is a nice day to walk", "I am bored", "This is how you take widget capture", "Ha Ha Ha!! That's funny !"}; 
  
  final Display display = new Display();
  final Shell shell = new Shell(display);
  shell.setText("Screen Capture");
  shell.setLayout(new GridLayout(1, true));
  
  final Composite composite = new Composite(shell, SWT.BORDER);
  composite.setLayout(new GridLayout(2, true));
  composite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
  
  Table table = new Table(composite, SWT.BORDER|SWT.V_SCROLL|SWT.H_SCROLL|SWT.FULL_SELECTION);
  
  table.setLinesVisible(true);
  table.setHeaderVisible(true);
  
  table.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
  
  TableColumn columnName = new TableColumn(table, SWT.LEFT);
  columnName.setText("Name");
  columnName.setWidth(100);
  
  TableColumn columnMsg = new TableColumn(table, SWT.LEFT);
  columnMsg.setText("Message");
  columnMsg.setWidth(200);
  
  for (int i = 0; i < 5; i++) 
  {
   TableItem item = new TableItem(table, SWT.NONE, 0);
   item.setText(0, names[i]);
   item.setText(1, msg[i]);   
  }
  
  StyledText text = new StyledText (composite, SWT.BORDER);
  text.setText("0123456789 ABCDEFGHIJKLM NOPQRSTUVWXYZ");
  text.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
  
  StyleRange style1 = new StyleRange();
  style1.start = 0;
  style1.length = 10;
  style1.fontStyle = SWT.BOLD;
  text.setStyleRange(style1);
  
  StyleRange style2 = new StyleRange();
  style2.start = 11;
  style2.length = 13;
  style2.foreground = display.getSystemColor(SWT.COLOR_RED);
  text.setStyleRange(style2);
  
  StyleRange style3 = new StyleRange();
  style3.start = 25;
  style3.length = 13;
  style3.background = display.getSystemColor(SWT.COLOR_BLUE);
  text.setStyleRange(style3);
  
  Button button = new Button(shell, SWT.PUSH);
  button.setText("Capture");
  button.pack();

  button.addListener(SWT.Selection, new Listener()
  {
   public void handleEvent(Event event) 
   {
    GC gc = new GC(display);
    final Image image = new Image(display, shell.getBounds());
    gc.copyArea(image, shell.getBounds().x, shell.getBounds().y);
    gc.dispose();

    Shell popup = new Shell(shell);
    popup.setText("Captured Image");
    popup.addListener(SWT.Close, new Listener() {
     public void handleEvent(Event e) {
      image.dispose();
     }
    });

    Canvas canvas = new Canvas(popup, SWT.NONE);
    canvas.setBounds(0,0,image.getImageData().width, image.getImageData().height);
    canvas.addPaintListener(new PaintListener() {
     public void paintControl(PaintEvent e) {
      e.gc.drawImage(image, 0, 0);
     }
    });
    popup.pack();
    popup.open();
   }
  });
  
  shell.pack();
  shell.open();
  
  while (!shell.isDisposed()) {
   if (!display.readAndDispatch())
    display.sleep();
  }
  
  display.dispose();
 }
}

Original Composite:

Captured Image:

Programmatically create eclipse Java project

Following is a brief code snippet for creating an eclipse Java project using core JDT API.

private IJavaProject createProject() throws Exception
{
    IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot();
    String projName = getProjectName();

    if(projName == null || projName.trim().length() == 0)
        return null;

    //create eclipse project
    IProject project = root.getProject(projName);
    if(project.exists())
        project.delete(true, null);

    project.create(null);
    project.open(null);

    //set the java project nature
    IProjectDescription description = project.getDescription();
    description.setNatureIds(new String[] { JavaCore.NATURE_ID});
    project.setDescription(description, null);

    //create java project
    IJavaProject javaProject = JavaCore.create(project);

    //add bin/ouput folder
    IFolder binFolder = project.getFolder("bin");
    binFolder.create(false, true, null);
    javaProject.setOutputLocation(binFolder.getFullPath(), null);

    //add libs to project class path
    List<IClasspathEntry> entries = new ArrayList<IClasspathEntry>();
    IVMInstall vmInstall = JavaRuntime.getDefaultVMInstall();
    LibraryLocation[] locations = JavaRuntime.getLibraryLocations(vmInstall);
    for (LibraryLocation element : locations) {
        entries.add(JavaCore.newLibraryEntry(element.getSystemLibraryPath(), null, null));
    }
    
    javaProject.setRawClasspath(entries.toArray(new IClasspathEntry[entries.size()]), null);

    //create source folder
    IFolder sourceFolder = project.getFolder("src");
    sourceFolder.create(false, true, null);

    IPackageFragmentRoot srcRoot = project.getPackageFragmentRoot(sourceFolder);
    IClasspathEntry[] oldEntries = project.getRawClasspath();
    IClasspathEntry[] newEntries = new IClasspathEntry[oldEntries.length + 1];
    System.arraycopy(oldEntries, 0, newEntries, 0, oldEntries.length);
    newEntries[oldEntries.length] = JavaCore.newSourceEntry(srcRoot.getPath());
    project.setRawClasspath(newEntries, null);

    return javaProject;
}

private String getProjectName()
{
    String init_value = "project_" + System.currentTimeMillis();
    InputDialog dialog = new InputDialog(getShell(), "Java Project", "Provide project name ..", init_value, new IInputValidator() {
        public String isValid(String newText)
        {
            char[] array = newText.toCharArray();
            for (int i = 0; i < array.length; i++)
            {
                if(!Character.isJavaIdentifierPart(array[i]))
                    return "Cannot contain special characters !!";
            }

            IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot();
            IProject[] projs = root.getProjects();
            for (int i = 0; i < projs.length; i++) {
                if(projs[i].getName().equalsIgnoreCase(newText))
                    return "Project already exist !!";
            }

            /*
                Not checking for special Win32 names like con etc.
            */
            return null;
        }
    });

    if(dialog.open() == Dialog.CANCEL)
        return null;

    return dialog.getValue();
}