/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
package org.apache.directory.studio.apacheds.configuration;
import java.net.URL;
import org.eclipse.core.runtime.FileLocator;
import org.eclipse.core.runtime.Path;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.swt.graphics.FontMetrics;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Control;
import org.eclipse.ui.plugin.AbstractUIPlugin;
import org.osgi.framework.BundleContext;
/**
* The activator class controls the plug-in life cycle.
*
* @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
* @version $Rev$, $Date$
*/
public class Activator extends AbstractUIPlugin
{
/** The plug-in ID */
public static final String PLUGIN_ID = "org.apache.directory.studio.apacheds.configuration"; //$NON-NLS-1$
/** The shared instance */
private static Activator plugin;
/**
* Creates a new instance of Activator.
*/
public Activator()
{
plugin = this;
}
/*
* (non-Javadoc)
* @see org.eclipse.ui.plugin.AbstractUIPlugin#start(org.osgi.framework.BundleContext)
*/
public void start( BundleContext context ) throws Exception
{
super.start( context );
}
/*
* (non-Javadoc)
* @see org.eclipse.ui.plugin.AbstractUIPlugin#stop(org.osgi.framework.BundleContext)
*/
public void stop( BundleContext context ) throws Exception
{
super.stop( context );
}
/**
* Returns the shared instance.
*
* @return
* the shared instance
*/
public static Activator getDefault()
{
return plugin;
}
/**
* Returns the button with respect to the font metrics.
*
* @param control a control
* @return the button width
*/
public static int getButtonWidth( Control control )
{
GC gc = new GC( control );
gc.setFont( JFaceResources.getDialogFont() );
FontMetrics fontMetrics = gc.getFontMetrics();
gc.dispose();
int width = Dialog.convertHorizontalDLUsToPixels( fontMetrics, IDialogConstants.BUTTON_WIDTH );
return width;
}
/**
* Use this method to get SWT images. Use the IMG_ constants from
* PluginConstants for the key.
*
* @param key
* The key (relative path to the image in filesystem)
* @return The image descriptor or null
*/
public ImageDescriptor getImageDescriptor( String key )
{
if ( key != null )
{
URL url = FileLocator.find( getBundle(), new Path( key ), null );
if ( url != null )
return ImageDescriptor.createFromURL( url );
else
return null;
}
else
{
return null;
}
}
/**
* Use this method to get SWT images. Use the IMG_ constants from
* PluginConstants for the key. A ImageRegistry is used to manage the
* the key->Image mapping.
* <p>
* Note: Don't dispose the returned SWT Image. It is disposed
* automatically when the plugin is stopped.
*
* @param key
* The key (relative path to the image in filesystem)
* @return The SWT Image or null
*/
public Image getImage( String key )
{
Image image = getImageRegistry().get( key );
if ( image == null )
{
ImageDescriptor id = getImageDescriptor( key );
if ( id != null )
{
image = id.createImage();
getImageRegistry().put( key, image );
}
}
return image;
}
}