Listen to key Traversed event : Text Event « SWT « Java Tutorial

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Java Tutorial » SWT » Text Event 
17. 18. 3. Listen to key Traversed event
Listen to key Traversed event
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.TraverseEvent;
import org.eclipse.swt.events.TraverseListener;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;

public class TraverseEventListen {

  public static void main(String[] args) {
    final Display display = new Display();
    Shell shell = new Shell(display);

    shell.setLayout(new FillLayout());

    final Text text = new Text(shell, SWT.SINGLE | SWT.BORDER);
    text.setText("press tab to draw");
    text.addTraverseListener(new TraverseListener() {
      public void keyTraversed(TraverseEvent e) {
        if (e.detail == SWT.TRAVERSE_TAB_NEXT || e.detail == SWT.TRAVERSE_TAB_PREVIOUS) {
          e.doit = true;

          GC gc = new GC(text);
          // Erase background first.
          Rectangle rect = text.getClientArea();
          gc.fillRectangle(rect.x, rect.y, rect.width, rect.height);

          Font font = new Font(display, "Arial"32, SWT.BOLD);
          gc.setFont(font);

          gc.drawString("tab event"1510);

          gc.dispose();
        }
      }
    });

    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch()) {
        display.sleep();
      }
    }
  }
}
17. 18. Text Event
17. 18. 1. Add focus in/out event to TextAdd focus in/out event to Text
17. 18. 2. Add KeyEvent listener to TextAdd KeyEvent listener to Text
17. 18. 3. Listen to key Traversed eventListen to key Traversed event
17. 18. 4. Use a regular expression to verify input(a phone number is used)Use a regular expression to verify input(a phone number is used)
17. 18. 5. Add events to Text: MouseDown, MouseMove, MouseUp, KeyDown, KeyUp ResizeAdd events to Text: MouseDown, MouseMove, MouseUp, KeyDown, KeyUp Resize
17. 18. 6. Detect when the user scrolls a text controlDetect when the user scrolls a text control
17. 18. 7. Verify input (format for date)Verify input (format for date)
17. 18. 8. Verify input (only allow digits)Verify input (only allow digits)
17. 18. 9. Text TraverseListener: Tab key event (override Tab behavior to traverse out of a Text)Text TraverseListener: Tab key event (override Tab behavior to traverse out of a Text)
17. 18. 10. Text default selection event(Return/Enter key)Text default selection event(Return/Enter key)
17. 18. 11. Add default selection listener to TextAdd default selection listener to Text
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