SWT: CoolBars

CoolBars are just like tool bars, and these can be dynamically repositioned by the user.

You can create cool bar using CoolBar instance.

CoolBar coolBar = new CoolBar(shell, SWT.BORDER);

You can add items to cool bar using CoolItem.

CoolItem coolItem1 = new CoolItem(coolBar, SWT.NONE);

Button button1 = new Button(coolBar, SWT.FLAT | SWT.BORDER);

button1.setText("Button");

button1.pack();

Point size = button1.getSize();

coolItem1.setControl(button1);

coolItem1.setSize(coolItem1.computeSize(size.x, size.y));

CoolBar provides 'setLocked' method, to lock the coolbar. When a coolbar is locked, its items cannot be repositioned. Whenever you click the button1, logic toggles the locking behavior of cool bar.

button1.addSelectionListener(new SelectionAdapter() {

         public void widgetSelected(SelectionEvent e) {

                 coolBar.setLocked(!coolBar.getLocked());

         }

});

Following is the complete working application.

package swt_app;

import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.CoolBar;
import org.eclipse.swt.widgets.CoolItem;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.ToolBar;
import org.eclipse.swt.widgets.ToolItem;

public class Test {

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

 private static void addWidgetsToShell(Display display, Shell shell) {
  CoolBar coolBar = new CoolBar(shell, SWT.BORDER);
  CoolItem coolItem1 = new CoolItem(coolBar, SWT.NONE);
  CoolItem coolItem2 = new CoolItem(coolBar, SWT.NONE);
  CoolItem coolItem3 = new CoolItem(coolBar, SWT.NONE);

  Button button1 = new Button(coolBar, SWT.FLAT | SWT.BORDER);
  button1.setText("Button");
  button1.pack();

  Button button2 = new Button(coolBar, SWT.PUSH);
  button2.setText("Another button");
  button2.pack();

  ToolBar tools = new ToolBar(coolBar, SWT.NONE);
  ToolItem b1 = new ToolItem(tools, SWT.FLAT);
  b1.setText("Tool");
  ToolItem b2 = new ToolItem(tools, SWT.FLAT);
  b2.setText("Bar");
  tools.pack();

  Point size = button1.getSize();
  coolItem1.setControl(button1);
  coolItem1.setSize(coolItem1.computeSize(size.x, size.y));

  size = button2.getSize();
  coolItem2.setControl(button2);
  coolItem2.setSize(coolItem2.computeSize(size.x, size.y));

  size = tools.getSize();
  coolItem3.setControl(tools);
  coolItem3.setSize(coolItem3.computeSize(size.x, size.y));
  coolItem3.setMinimumSize(size);

  coolBar.setWrapIndices(new int[] { 2 });
  coolBar.setSize(300, 120);

  button1.addSelectionListener(new SelectionAdapter() {
   public void widgetSelected(SelectionEvent e) {
    coolBar.setLocked(!coolBar.getLocked());
   }
  });
 }

 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);
  shell.setText("SWT Tutorial");

  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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