Progress report

If you perform long running operations you should provide the user some information about the long running job. A good way of doing this is to show a progress indicator or a progress dialog.

Create a new project "de.vogella.rcp.intro.progress" with "Hello RCP" as a template. Create the command "de.vogella.rcp.intro.progress.showDialog" with the default handler "de.vogella.rcp.intro.progress.handler.ShowDialog". Create the handler class.

   
package de.vogella.rcp.intro.progress.handler;

import java.lang.reflect.InvocationTargetException;

import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.jface.dialogs.ProgressMonitorDialog;
import org.eclipse.jface.operation.IRunnableWithProgress;
import org.eclipse.ui.handlers.HandlerUtil;

public class ShowDialog extends AbstractHandler {

 @Override
 public Object execute(ExecutionEvent event) throws ExecutionException {
  ProgressMonitorDialog dialog = new ProgressMonitorDialog(HandlerUtil
    .getActiveShell(event).getShell());
  try {
   dialog.run(true, true, new IRunnableWithProgress() {
    @Override
    public void run(IProgressMonitor monitor) {
     monitor
       .beginTask("Doing something timeconsuming here",
         100);
     for (int i = 0; i < 10; i++) {
      if (monitor.isCanceled())
       return;
      monitor.subTask("I'm doing something here " + i);
      sleep(1000);
      monitor.worked(i);
     }
     monitor.done();
    }
   });
  } catch (InvocationTargetException e) {
   e.printStackTrace();
  } catch (InterruptedException e) {
   e.printStackTrace();
  }

  return null;
 }

 private void sleep(Integer waitTime) {
  try {
   Thread.sleep(waitTime);
  } catch (Throwable t) {
   System.out.println("Wait time interrupted");
  }
 }

}

  

Add this command to the menu.

Run the application. Your command should open a dialog which show the process.