| /******************************************************************************* |
| * Copyright (c) 2009-2010 David Donahue 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: |
| * David Donahue - initial API, implementation and documentation |
| * Austin Riddle - improvements to widget hierarchy and data flow for |
| * consistency with SWT behavior. |
| ******************************************************************************/ |
| package org.eclipse.rap.rwt.visualization.google.internal; |
| |
| import java.io.IOException; |
| |
| import org.eclipse.rap.rwt.internal.protocol.ClientObjectFactory; |
| import org.eclipse.rap.rwt.internal.protocol.IClientObject; |
| import org.eclipse.rap.rwt.lifecycle.AbstractWidgetLCA; |
| import org.eclipse.rap.rwt.lifecycle.ControlLCAUtil; |
| import org.eclipse.rap.rwt.lifecycle.IWidgetAdapter; |
| import org.eclipse.rap.rwt.lifecycle.WidgetLCAUtil; |
| import org.eclipse.rap.rwt.lifecycle.WidgetUtil; |
| import org.eclipse.rap.rwt.visualization.google.VisualizationWidget; |
| import org.eclipse.swt.widgets.Control; |
| import org.eclipse.swt.widgets.Widget; |
| |
| /** |
| * <p> |
| * Base type for Google Visualizations. |
| * </p> |
| * |
| * <p> |
| * Note that changes to the data or options of a widget obtained via <code>getWidgetData()</code> |
| * and <code>getWidgetOptions()</code> will be propagated to the client side, but the changes |
| * will not be rendered until <code>isDirty()</code> returns true. At that point the client-side widget will |
| * be told to redraw. |
| * </p> |
| */ |
| @SuppressWarnings("restriction") |
| public abstract class VisualizationWidgetLCA extends AbstractWidgetLCA { |
| protected static final String REDRAW_FUNC = "redraw"; |
| protected static final String PROP_DATA = "widgetData"; |
| protected static final String PROP_OPTIONS = "widgetOptions"; |
| |
| private static final String[] ALLOWED_STYLES = new String[] { "BORDER" }; |
| |
| public abstract Class<?> getWidgetType(); |
| |
| @Override |
| public void renderInitialization( final Widget widget ) throws IOException { |
| Control control = (Control)widget; |
| IClientObject clientObject = ClientObjectFactory.getClientObject( control ); |
| String canonicalName = getWidgetType().getCanonicalName(); |
| clientObject.create( canonicalName ); |
| // clientObject.set( "id", WidgetUtil.getId( control ) ); |
| clientObject.set( "parent", WidgetUtil.getId( control.getParent() ) ); |
| clientObject.set( "style", WidgetLCAUtil.getStyles( control, ALLOWED_STYLES ) ); |
| } |
| |
| @Override |
| public void preserveValues( final Widget widget ) { |
| ControlLCAUtil.preserveValues( (Control)widget ); |
| WidgetLCAUtil.preserveCustomVariant( widget ); |
| ControlLCAUtil.preserveValues( ( Control )widget ); |
| IWidgetAdapter adapter = WidgetUtil.getAdapter( widget ); |
| adapter.preserve( PROP_OPTIONS, ( ( VisualizationWidget )widget ).getWidgetOptions() ); |
| adapter.preserve( PROP_DATA, ( ( VisualizationWidget )widget ).getWidgetData() ); |
| } |
| |
| @Override |
| public void renderChanges( final Widget widget ) throws IOException { |
| ControlLCAUtil.renderChanges( ( Control )widget ); |
| WidgetLCAUtil.renderCustomVariant( widget ); |
| |
| VisualizationWidget vWidget = ( VisualizationWidget )widget; |
| IClientObject clientObject = ClientObjectFactory.getClientObject( vWidget ); |
| IWidgetAdapter adapter = WidgetUtil.getAdapter(widget); |
| boolean changed = !adapter.isInitialized() || WidgetLCAUtil.hasChanged(widget, PROP_OPTIONS, vWidget.getWidgetOptions()); |
| if (changed) { |
| clientObject.set(PROP_OPTIONS, vWidget.getWidgetOptions()); |
| } |
| changed = WidgetLCAUtil.hasChanged(widget, PROP_DATA, vWidget.getWidgetData()); |
| if (changed) { |
| clientObject.set(PROP_DATA, vWidget.getWidgetData()); |
| } |
| |
| if (vWidget.isDirty()) { |
| clientObject.call(REDRAW_FUNC, null); |
| vWidget.setDirty(false); |
| } |
| } |
| |
| @Override |
| public void renderDispose( final Widget widget ) throws IOException { |
| ClientObjectFactory.getClientObject( widget ).destroy(); |
| } |
| |
| /** |
| * Respond to selection events, set the value of selectedItem on the widget Java object, |
| * and broadcast a SWT.Selection event to any listeners |
| */ |
| public void readData( final Widget widget ) { |
| if (widget==null) return; |
| VisualizationWidget visWidget = ( VisualizationWidget )widget; |
| String selectedItem = WidgetLCAUtil.readPropertyValue( visWidget, "selectedItem" ); |
| String selectedRow = WidgetLCAUtil.readPropertyValue( visWidget, "selectedRow" ); |
| String selectedColumn = WidgetLCAUtil.readPropertyValue( visWidget, "selectedColumn" ); |
| String selectedValue = WidgetLCAUtil.readPropertyValue( visWidget, "selectedValue" ); |
| if (selectedItem!=null) { |
| visWidget.setSelectedItem( selectedItem ); |
| visWidget.setSelectedRow( selectedRow ); |
| visWidget.setSelectedColumn( selectedColumn ); |
| visWidget.setSelectedValue( selectedValue ); |
| ControlLCAUtil.processSelection( visWidget, null, true ); |
| } |
| } |
| } |