SharedPart.java :  » IDE-Eclipse » pde » org » eclipse » pde » internal » ui » parts » Java Open Source

/*******************************************************************************
 *  Copyright (c) 2000, 2008 IBM Corporation and others.
 *  All rights reserved. This program and the accompanying materials
 *  are made available under the terms of the Eclipse Public License v1.0
 *  which accompanies this distribution, and is available at
 *  http://www.eclipse.org/legal/epl-v10.html
 * 
 *  Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.pde.internal.ui.parts;

import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
import org.eclipse.ui.forms.widgets.FormToolkit;

public abstract class SharedPart {
  private boolean enabled = true;

  public void setEnabled(boolean enabled) {
    if (enabled != this.enabled) {
      this.enabled = enabled;
      updateEnabledState();
    }
  }

  public abstract void createControl(Composite parent, int style, int span, FormToolkit toolkit);

  public boolean isEnabled() {
    return enabled;
  }

  protected void updateEnabledState() {
  }

  protected Composite createComposite(Composite parent, FormToolkit toolkit) {
    if (toolkit == null)
      return new Composite(parent, SWT.NULL);
    return toolkit.createComposite(parent);
  }

  protected Label createEmptySpace(Composite parent, int span, FormToolkit toolkit) {
    Label label;
    if (toolkit != null) {
      label = toolkit.createLabel(parent, null);
    } else {
      label = new Label(parent, SWT.NULL);
    }
    GridData gd = new GridData(GridData.VERTICAL_ALIGN_BEGINNING);
    gd.horizontalSpan = span;
    gd.widthHint = 0;
    gd.heightHint = 0;
    label.setLayoutData(gd);
    return label;
  }
}