/*******************************************************************************
* Copyright (c) 2013, 2015 EclipseSource 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:
* EclipseSource - initial API and implementation
******************************************************************************/
package org.eclipse.swt.internal.widgets.combokit;
import static org.eclipse.rap.rwt.internal.lifecycle.WidgetUtil.getAdapter;
import static org.eclipse.rap.rwt.internal.protocol.ClientMessageConst.EVENT_DEFAULT_SELECTION;
import static org.eclipse.rap.rwt.internal.protocol.ClientMessageConst.EVENT_MODIFY;
import static org.eclipse.rap.rwt.internal.protocol.ClientMessageConst.EVENT_SELECTION;
import static org.eclipse.rap.rwt.remote.JsonMapping.readPoint;
import static org.eclipse.swt.internal.events.EventLCAUtil.isListening;
import org.eclipse.rap.json.JsonObject;
import org.eclipse.rap.json.JsonValue;
import org.eclipse.rap.rwt.internal.lifecycle.ProcessActionRunner;
import org.eclipse.rap.rwt.internal.protocol.ControlOperationHandler;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.internal.widgets.ITextAdapter;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Event;
public class ComboOperationHandler extends ControlOperationHandler<Combo> {
private static final String PROP_SELECTION_INDEX = "selectionIndex";
private static final String PROP_LIST_VISIBLE = "listVisible";
private static final String PROP_TEXT = "text";
private static final String PROP_SELECTION = "selection";
public ComboOperationHandler( Combo combo ) {
super( combo );
}
@Override
public void handleSet( Combo combo, JsonObject properties ) {
super.handleSet( combo, properties );
handleSetSelectionIndex( combo, properties );
handleSetListVisible( combo, properties );
handleSetText( combo, properties );
handleSetSelection( combo, properties );
}
@Override
public void handleNotify( Combo combo, String eventName, JsonObject properties ) {
if( EVENT_SELECTION.equals( eventName ) ) {
handleNotifySelection( combo, properties );
} else if( EVENT_DEFAULT_SELECTION.equals( eventName ) ) {
handleNotifyDefaultSelection( combo, properties );
} else if( EVENT_MODIFY.equals( eventName ) ) {
handleNotifyModify( );
} else {
super.handleNotify( combo, eventName, properties );
}
}
/*
* PROTOCOL SET selectionIndex
*
* @param selectionIndex (int) the index of the item to select
*/
public void handleSetSelectionIndex( Combo combo, JsonObject properties ) {
JsonValue selectionIndex = properties.get( PROP_SELECTION_INDEX );
if( selectionIndex != null ) {
combo.select( selectionIndex.asInt() );
}
}
/*
* PROTOCOL SET listVisible
*
* @param listVisible (boolean) the visibility state of the list
*/
public void handleSetListVisible( Combo combo, JsonObject properties ) {
JsonValue listVisible = properties.get( PROP_LIST_VISIBLE );
if( listVisible != null ) {
combo.setListVisible( listVisible.asBoolean() );
}
}
/*
* PROTOCOL SET text
*
* @param text (string) the text
*/
public void handleSetText( final Combo combo, JsonObject properties ) {
JsonValue value = properties.get( PROP_TEXT );
if( value != null ) {
final String text = value.asString();
if( isListening( combo, SWT.Verify ) ) {
// setText needs to be executed in a ProcessAcction runnable as it may
// fire a VerifyEvent whose fields (text and doit) need to be evaluated
// before actually setting the new value
ProcessActionRunner.add( new Runnable() {
@Override
public void run() {
if( !combo.isDisposed() ) {
setText( combo, text );
// since text is set in process action, preserved values have to be replaced
getAdapter( combo ).preserve( PROP_TEXT, text );
}
}
} );
} else {
setText( combo, text );
}
}
}
/*
* PROTOCOL SET selection
*
* @param selection ([start, end]) the text selection
*/
public void handleSetSelection( final Combo combo, JsonObject properties ) {
JsonValue value = properties.get( PROP_SELECTION );
if( value != null ) {
final Point selection = readPoint( value );
if( isListening( combo, SWT.Verify ) ) {
// if text is delayed, delay the selection too
ProcessActionRunner.add( new Runnable() {
@Override
public void run() {
if( !combo.isDisposed() ) {
combo.setSelection( selection );
// since selection is set in process action, preserved values have to be replaced
getAdapter( combo ).preserve( PROP_SELECTION, combo.getSelection() );
}
}
} );
} else {
combo.setSelection( selection );
}
}
}
/*
* PROTOCOL NOTIFY Selection
*
* @param altKey (boolean) true if the ALT key was pressed
* @param ctrlKey (boolean) true if the CTRL key was pressed
* @param shiftKey (boolean) true if the SHIFT key was pressed
*/
public void handleNotifySelection( Combo combo, JsonObject properties ) {
Event event = createSelectionEvent( SWT.Selection, properties );
combo.notifyListeners( SWT.Selection, event );
}
/*
* PROTOCOL NOTIFY DefaultSelection
*
* @param altKey (boolean) true if the ALT key was pressed
* @param ctrlKey (boolean) true if the CTRL key was pressed
* @param shiftKey (boolean) true if the SHIFT key was pressed
*/
public void handleNotifyDefaultSelection( Combo combo, JsonObject properties ) {
Event event = createSelectionEvent( SWT.DefaultSelection, properties );
combo.notifyListeners( SWT.DefaultSelection, event );
}
/*
* PROTOCOL NOTIFY Modify
* ignored, Modify event is fired when set text
*/
public void handleNotifyModify() {
}
private static void setText( Combo combo, String value ) {
if( !combo.getText().equals( value ) ) {
combo.getAdapter( ITextAdapter.class ).setText( value );
}
}
}