/*
* 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.ldapstudio.browser.ui.widgets;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.IHandler;
import org.eclipse.jface.contentassist.ComboContentAssistSubjectAdapter;
import org.eclipse.jface.contentassist.SubjectControlContentAssistant;
import org.eclipse.jface.contentassist.TextContentAssistSubjectAdapter;
import org.eclipse.jface.text.ITextViewer;
import org.eclipse.swt.events.FocusEvent;
import org.eclipse.swt.events.FocusListener;
import org.eclipse.swt.events.TraverseEvent;
import org.eclipse.swt.events.TraverseListener;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.handlers.IHandlerActivation;
import org.eclipse.ui.handlers.IHandlerService;
import org.eclipse.ui.texteditor.ITextEditorActionDefinitionIds;
public class DialogContentAssistant extends SubjectControlContentAssistant implements FocusListener
{
private Control control;
private IHandlerActivation handlerActivation;
private boolean possibleCompletionsVisible;
public DialogContentAssistant()
{
super();
this.possibleCompletionsVisible = false;
}
public void install( Text text )
{
this.control = text;
this.control.addFocusListener( this );
super.install( new TextContentAssistSubjectAdapter( text ) );
}
public void install( Combo combo )
{
this.control = combo;
this.control.addFocusListener( this );
super.install( new ComboContentAssistSubjectAdapter( combo ) );
}
public void install( ITextViewer viewer )
{
this.control = viewer.getTextWidget();
this.control.addFocusListener( this );
// stop traversal (ESC) if popup is shown
this.control.addTraverseListener( new TraverseListener()
{
public void keyTraversed( TraverseEvent e )
{
if ( possibleCompletionsVisible )
{
e.doit = false;
}
}
} );
super.install( viewer );
}
public void uninstall()
{
if ( this.handlerActivation != null )
{
IHandlerService handlerService = ( IHandlerService ) PlatformUI.getWorkbench().getAdapter(
IHandlerService.class );
handlerService.deactivateHandler( this.handlerActivation );
this.handlerActivation = null;
}
if ( this.control != null )
{
this.control.removeFocusListener( this );
}
super.uninstall();
}
protected Point restoreCompletionProposalPopupSize()
{
possibleCompletionsVisible = true;
return super.restoreCompletionProposalPopupSize();
}
public String showPossibleCompletions()
{
possibleCompletionsVisible = true;
return super.showPossibleCompletions();
}
protected void possibleCompletionsClosed()
{
this.possibleCompletionsVisible = false;
super.possibleCompletionsClosed();
}
public void focusGained( FocusEvent e )
{
IHandlerService handlerService = ( IHandlerService ) PlatformUI.getWorkbench().getAdapter(
IHandlerService.class );
if ( handlerService != null )
{
IHandler handler = new org.eclipse.core.commands.AbstractHandler()
{
public Object execute( ExecutionEvent event ) throws org.eclipse.core.commands.ExecutionException
{
showPossibleCompletions();
return null;
}
};
this.handlerActivation = handlerService.activateHandler(
ITextEditorActionDefinitionIds.CONTENT_ASSIST_PROPOSALS, handler );
}
}
public void focusLost( FocusEvent e )
{
if ( this.handlerActivation != null )
{
IHandlerService handlerService = ( IHandlerService ) PlatformUI.getWorkbench().getAdapter(
IHandlerService.class );
handlerService.deactivateHandler( this.handlerActivation );
this.handlerActivation = null;
}
}
}