/*
* 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.templateeditor.editor.widgets;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import org.apache.directory.studio.entryeditors.IEntryEditor;
import org.apache.directory.studio.ldapbrowser.core.model.IAttribute;
import org.apache.directory.studio.ldapbrowser.core.model.IValue;
import org.eclipse.jface.viewers.ArrayContentProvider;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.ListViewer;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.List;
import org.eclipse.ui.forms.widgets.FormToolkit;
import org.apache.directory.studio.templateeditor.model.widgets.TemplateListbox;
import org.apache.directory.studio.templateeditor.model.widgets.ValueItem;
/**
* This class implements an editor list box.
*
* @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
*/
public class EditorListbox extends EditorWidget<TemplateListbox>
{
/** The list viewer */
private ListViewer listViewer;
/** The selection listener */
private ISelectionChangedListener selectionListener = new ISelectionChangedListener()
{
public void selectionChanged( SelectionChangedEvent event )
{
StructuredSelection selection = ( StructuredSelection ) listViewer.getSelection();
if ( !selection.isEmpty() )
{
// Deleting the old attribute
deleteAttribute();
// Re-creating the attribute with the selected values
Iterator<?> iterator = selection.iterator();
while ( iterator.hasNext() )
{
ValueItem item = ( ValueItem ) iterator.next();
addAttributeValue( ( String ) item.getValue() );
}
}
}
};
/**
* Creates a new instance of EditorListbox.
*
* @param editor
* the associated editor
* @param templateListbox
* the associated template list box
* @param toolkit
* the associated toolkit
*/
public EditorListbox( IEntryEditor editor, TemplateListbox templateListbox, FormToolkit toolkit )
{
super( templateListbox, editor, toolkit );
}
/**
* {@inheritDoc}
*/
public Composite createWidget( Composite parent )
{
// Creating and initializing the widget UI
Composite composite = initWidget( parent );
// Updating the widget's content
updateWidget();
// Adding the listeners
addListeners();
return composite;
}
/**
* Creates and initializes the widget UI.
*
* @param parent
* the parent composite
* @return the associated composite
*/
private Composite initWidget( Composite parent )
{
// Getting the style of the listbox
int style = SWT.BORDER /*| SWT.V_SCROLL | SWT.H_SCROLL*/;
if ( getWidget().isMultipleSelection() )
{
style |= SWT.MULTI;
}
else
{
style |= SWT.SINGLE;
}
// Creating the list
List list = new List( parent, style );
list.setLayoutData( getGridata() );
// Creating the associated viewer
listViewer = new ListViewer( list );
listViewer.getList().setEnabled( getWidget().isEnabled() );
listViewer.setContentProvider( new ArrayContentProvider() );
listViewer.setLabelProvider( new LabelProvider()
{
public String getText( Object element )
{
return ( ( ValueItem ) element ).getLabel();
}
} );
listViewer.setInput( getWidget().getItems() );
return parent;
}
/**
* Updates the widget's content.
*/
private void updateWidget()
{
IAttribute attribute = getAttribute();
if ( ( attribute != null ) && ( attribute.getValueSize() > 0 ) )
{
// Registering the values of the items in a map for easy
// access
Map<Object, ValueItem> itemsMap = new HashMap<Object, ValueItem>();
for ( ValueItem valueItem : getWidget().getItems() )
{
itemsMap.put( valueItem.getValue(), valueItem );
}
// Creating a list of the selected objects
java.util.List<ValueItem> selectedList = new ArrayList<ValueItem>();
// Checking each value
for ( IValue value : attribute.getValues() )
{
ValueItem valueItem = itemsMap.get( value.getRawValue() );
if ( valueItem != null )
{
selectedList.add( valueItem );
}
}
// Setting the selection to the viewer
if ( selectedList.size() > 0 )
{
listViewer.setSelection( new StructuredSelection( selectedList.toArray() ) );
}
}
else
{
listViewer.setSelection( null );
}
}
/**
* Adds the listeners.
*/
private void addListeners()
{
listViewer.addSelectionChangedListener( selectionListener );
}
/**
* Adds the listeners.
*/
private void removeListeners()
{
listViewer.removeSelectionChangedListener( selectionListener );
}
/**
* {@inheritDoc}
*/
public void update()
{
removeListeners();
updateWidget();
addListeners();
}
/**
* {@inheritDoc}
*/
public void dispose()
{
// Nothing to do
}
}