SWT: Scale widget

You can define a scale widget using Scale class.

Following statements define horizontal scale.

Scale horizontalScale = new Scale(shell, SWT.HORIZONTAL);

horizontalScale.setMaximum(100);

horizontalScale.setMinimum(10);

horizontalScale.setBounds(50, 50, horizontalScaleWidth, horizontalScaleHeight);

horizontalScale.setPageIncrement(20);

horizontalScale.setBackground(new Color(display, 255, 255, 255));

  

Following statements define vertical scale.

Scale verticalScale = new Scale(shell, SWT.VERTICAL);

verticalScale.setMaximum(1000);

verticalScale.setMinimum(500);

verticalScale.setBounds(250, 150, verticalScaleWidth, verticalScaleHeight);

verticalScale.setPageIncrement(20);

verticalScale.setBackground(new Color(display, 255, 255, 255));

Following is the complete working application.

package swt_app;

import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Scale;
import org.eclipse.swt.widgets.Shell;

public class Test {

 private static int shellWidth = 1000;
 private static int shellHeight = 700;

 private static int horizontalScaleWidth = 600;
 private static int horizontalScaleHeight = 50;

 private static int verticalScaleWidth = 50;
 private static int verticalScaleHeight = 400;

 private static void addWidgetsToShell(Display display, Shell shell) {

  Scale horizontalScale = new Scale(shell, SWT.HORIZONTAL);
  horizontalScale.setMaximum(100);
  horizontalScale.setMinimum(10);
  horizontalScale.setBounds(50, 50, horizontalScaleWidth, horizontalScaleHeight);
  horizontalScale.setPageIncrement(20);
  horizontalScale.setBackground(new Color(display, 255, 255, 255));

  Scale verticalScale = new Scale(shell, SWT.VERTICAL);
  verticalScale.setMaximum(1000);
  verticalScale.setMinimum(500);
  verticalScale.setBounds(250, 150, verticalScaleWidth, verticalScaleHeight);
  verticalScale.setPageIncrement(20);
  verticalScale.setBackground(new Color(display, 255, 255, 255));

 }

 public static void main(String[] args) {

  /* Instantiate Display object, it represents SWT session */
  Display display = new Display();

  /*
   * Define Shell, it represent a window, You can add more than one shell
   * to Display
   */
  Shell shell = new Shell(display);
  shell.setSize(shellWidth, shellHeight);

  addWidgetsToShell(display, shell);

  /* Open shell window */
  shell.open();

  /*
   * Run the event dispatching loop until an exit condition occurs, which
   * is typically when the main shell window is closed by the user.
   */

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

  /* Dispose the display */
  display.dispose();

 }
}

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