bundles/org.eclipse.ui/Eclipse UI/org/eclipse/ui/internal/dialogs/WorkbenchPreferenceNode.java

package org.eclipse.ui.internal.dialogs;

/*
 * (c) Copyright IBM Corp. 2000, 2001.
 * All Rights Reserved.
 */
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.ui.*;
import org.eclipse.ui.internal.WorkbenchMessages;
import org.eclipse.ui.internal.WorkbenchPlugin;
import org.eclipse.jface.*;
import org.eclipse.jface.dialogs.*;
import org.eclipse.jface.preference.*;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.swt.widgets.*;
import org.eclipse.swt.graphics.Image;
import java.util.*;

/**
 * A proxy for a preference page to avoid creation of preference page
 * just to show a node in the preference dialog tree.
 */
public class WorkbenchPreferenceNode extends PreferenceNode {
	private String category;
	private IConfigurationElement configurationElement;
	public final static String ATT_CONTRIBUTOR_CLASS = "class";//$NON-NLS-1$
	private IWorkbench workbench;
public WorkbenchPreferenceNode(String nodeId, String nodeLabel, String category, ImageDescriptor nodeImage, IConfigurationElement element, IWorkbench newWorkbench) {
	super(nodeId, nodeLabel, nodeImage, null);
	this.category = category;
	this.configurationElement = element;
	this.workbench = newWorkbench;
}
public WorkbenchPreferenceNode(String nodeId, String nodeLabel, String category, ImageDescriptor nodeImage, IWorkbenchPreferencePage preferencePage) {
	super(nodeId, nodeLabel, nodeImage, null);
	setPage(preferencePage);
}
/**
 * Creates the preference page this node stands for.
 */ 
public void createPage() {
	IWorkbenchPreferencePage page;
	try {
		page = (IWorkbenchPreferencePage)WorkbenchPlugin.createExtension(
			configurationElement, ATT_CONTRIBUTOR_CLASS);
	}
	catch (CoreException e) {
		// Just inform the user about the error. The details are
		// written to the log by now.
		MessageDialog.openError(
			(Shell)null, 
			WorkbenchMessages.getString("PreferenceNode.errorTitle"),  //$NON-NLS-1$
			WorkbenchMessages.getString("PreferenceNode.errorMessage"));  //$NON-NLS-1$
		page = new EmptyPreferencePage();
	}
	
	page.init(workbench);
	if (getLabelImage() != null)
		page.setImageDescriptor(getImageDescriptor());
	page.setTitle(getLabelText());
	setPage(page);
}
/**
 * 
 * @return java.lang.String
 */
public String getCategory() {
	return category;
}
}