Java by API/org.eclipse.swt.browser/ProgressListener

implements ProgressListener

import org.eclipse.swt.SWT;
import org.eclipse.swt.browser.Browser;
import org.eclipse.swt.browser.CloseWindowListener;
import org.eclipse.swt.browser.LocationEvent;
import org.eclipse.swt.browser.LocationListener;
import org.eclipse.swt.browser.ProgressEvent;
import org.eclipse.swt.browser.ProgressListener;
import org.eclipse.swt.browser.StatusTextEvent;
import org.eclipse.swt.browser.StatusTextListener;
import org.eclipse.swt.browser.WindowEvent;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.FormAttachment;
import org.eclipse.swt.layout.FormData;
import org.eclipse.swt.layout.FormLayout;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.ruposite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
public class MainClass {
  private static final String AT_REST = "Ready";
  public MainClass(){
    Display display = new Display();
    Shell shell = new Shell(display);
    shell.setText("Advanced Browser");
    createContents(shell, "http://www.jexp.ru");
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch()) {
        display.sleep();
      }
    }
    display.dispose();
    
  }
  public void createContents(Shell shell, String location) {
    shell.setLayout(new FormLayout());
    Composite controls = new Composite(shell, SWT.NONE);
    FormData data = new FormData();
    data.top = new FormAttachment(0, 0);
    data.left = new FormAttachment(0, 0);
    data.right = new FormAttachment(100, 0);
    controls.setLayoutData(data);
    Label status = new Label(shell, SWT.NONE);
    data = new FormData();
    data.left = new FormAttachment(0, 0);
    data.right = new FormAttachment(100, 0);
    data.bottom = new FormAttachment(100, 0);
    status.setLayoutData(data);
    final Browser browser = new Browser(shell, SWT.BORDER);
    data = new FormData();
    data.top = new FormAttachment(controls);
    data.bottom = new FormAttachment(status);
    data.left = new FormAttachment(0, 0);
    data.right = new FormAttachment(100, 0);
    browser.setLayoutData(data);
    controls.setLayout(new GridLayout(7, false));
    Button button = new Button(controls, SWT.PUSH);
    button.setText("Back");
    button.addSelectionListener(new SelectionAdapter() {
      public void widgetSelected(SelectionEvent event) {
        browser.back();
      }
    });
    button = new Button(controls, SWT.PUSH);
    button.setText("Forward");
    button.addSelectionListener(new SelectionAdapter() {
      public void widgetSelected(SelectionEvent event) {
        browser.forward();
      }
    });
    button = new Button(controls, SWT.PUSH);
    button.setText("Refresh");
    button.addSelectionListener(new SelectionAdapter() {
      public void widgetSelected(SelectionEvent event) {
        browser.refresh();
      }
    });
    button = new Button(controls, SWT.PUSH);
    button.setText("Stop");
    button.addSelectionListener(new SelectionAdapter() {
      public void widgetSelected(SelectionEvent event) {
        browser.stop();
      }
    });
    final Text url = new Text(controls, SWT.BORDER);
    url.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
    url.setFocus();
    button = new Button(controls, SWT.PUSH);
    button.setText("Go");
    button.addSelectionListener(new SelectionAdapter() {
      public void widgetSelected(SelectionEvent event) {
        browser.setUrl(url.getText());
      }
    });
    Label throbber = new Label(controls, SWT.NONE);
    throbber.setText(AT_REST);
    shell.setDefaultButton(button);
    browser.addCloseWindowListener(new AdvancedCloseWindowListener());
    browser.addLocationListener(new AdvancedLocationListener(url));
    browser.addProgressListener(new AdvancedProgressListener(throbber));
    browser.addStatusTextListener(new AdvancedStatusTextListener(status));
    if (location != null) {
      browser.setUrl(location);
    }
  }
  class AdvancedCloseWindowListener implements CloseWindowListener {
    public void close(WindowEvent event) {
      ((Browser) event.widget).getShell().close();
    }
  }
  class AdvancedLocationListener implements LocationListener {
    private Text location;
    public AdvancedLocationListener(Text text) {
      location = text;
    }
    public void changing(LocationEvent event) {
      location.setText("Loading " + event.location + "...");
    }
    public void changed(LocationEvent event) {
      location.setText(event.location);
    }
  }
  class AdvancedProgressListener implements ProgressListener {
    private Label progress;
    public AdvancedProgressListener(Label label) {
      progress = label;
    }
    public void changed(ProgressEvent event) {
      if (event.total != 0) {
        int percent = (int) (event.current / event.total);
        progress.setText(percent + "%");
      } else {
        progress.setText("");
      }
    }
    public void completed(ProgressEvent event) {
      progress.setText(AT_REST);
    }
  }
  class AdvancedStatusTextListener implements StatusTextListener {
    private Label status;
    public AdvancedStatusTextListener(Label label) {
      status = label;
    }
    public void changed(StatusTextEvent event) {
      status.setText(event.text);
    }
  }
  public static void main(String[] args) {
    new MainClass();
  }
}