/*******************************************************************************
* 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.treekit;
import static org.eclipse.rap.rwt.internal.lifecycle.WidgetUtil.find;
import static org.eclipse.rap.rwt.internal.lifecycle.WidgetUtil.getId;
import static org.eclipse.rap.rwt.internal.protocol.ClientMessageConst.EVENT_COLLAPSE;
import static org.eclipse.rap.rwt.internal.protocol.ClientMessageConst.EVENT_DEFAULT_SELECTION;
import static org.eclipse.rap.rwt.internal.protocol.ClientMessageConst.EVENT_EXPAND;
import static org.eclipse.rap.rwt.internal.protocol.ClientMessageConst.EVENT_PARAM_ITEM;
import static org.eclipse.rap.rwt.internal.protocol.ClientMessageConst.EVENT_SELECTION;
import static org.eclipse.rap.rwt.internal.protocol.ClientMessageConst.EVENT_SET_DATA;
import org.eclipse.rap.json.JsonArray;
import org.eclipse.rap.json.JsonObject;
import org.eclipse.rap.json.JsonValue;
import org.eclipse.rap.rwt.internal.protocol.ControlOperationHandler;
import org.eclipse.swt.SWT;
import org.eclipse.swt.internal.widgets.CellToolTipUtil;
import org.eclipse.swt.internal.widgets.ICellToolTipAdapter;
import org.eclipse.swt.internal.widgets.ICellToolTipProvider;
import org.eclipse.swt.internal.widgets.ITreeAdapter;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.ScrollBar;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.swt.widgets.TreeItem;
import org.eclipse.swt.widgets.Widget;
public class TreeOperationHandler extends ControlOperationHandler<Tree> {
private static final String PROP_SELECTION = "selection";
private static final String PROP_SCROLL_LEFT = "scrollLeft";
private static final String PROP_TOP_ITEM_INDEX = "topItemIndex";
private static final String METHOD_RENDER_TOOLTIP_TEXT = "renderToolTipText";
public TreeOperationHandler( Tree tree ) {
super( tree );
}
@Override
public void handleSet( Tree tree, JsonObject properties ) {
super.handleSet( tree, properties );
handleSetSelection( tree, properties );
handleSetScrollLeft( tree, properties );
handleSetTopItemIndex( tree, properties );
}
@Override
public void handleCall( Tree tree, String method, JsonObject properties ) {
if( METHOD_RENDER_TOOLTIP_TEXT.equals( method ) ) {
handleCallRenderToolTipText( tree, properties );
}
}
@Override
public void handleNotify( Tree tree, String eventName, JsonObject properties ) {
if( EVENT_SELECTION.equals( eventName ) ) {
handleNotifySelection( tree, properties );
} else if( EVENT_DEFAULT_SELECTION.equals( eventName ) ) {
handleNotifyDefaultSelection( tree, properties );
} else if( EVENT_EXPAND.equals( eventName ) ) {
handleNotifyExpand( tree, properties );
} else if( EVENT_COLLAPSE.equals( eventName ) ) {
handleNotifyCollapse( tree, properties );
} else if( EVENT_SET_DATA.equals( eventName ) ) {
handleNotifySetData();
} else {
super.handleNotify( tree, eventName, properties );
}
}
/*
* PROTOCOL SET selection
*
* @param selection ([string]) array with ids of selected items
*/
public void handleSetSelection( Tree tree, JsonObject properties ) {
JsonValue values = properties.get( PROP_SELECTION );
if( values != null ) {
JsonArray itemIds = values.asArray();
TreeItem[] selectedItems = new TreeItem[ itemIds.size() ];
boolean validItemFound = false;
for( int i = 0; i < itemIds.size(); i++ ) {
selectedItems[ i ] = getItem( tree, itemIds.get( i ).asString() );
if( selectedItems[ i ] != null ) {
validItemFound = true;
}
}
if( !validItemFound ) {
selectedItems = new TreeItem[ 0 ];
}
tree.setSelection( selectedItems );
}
}
/*
* PROTOCOL SET scrollLeft
*
* @param scrollLeft (int) left scroll offset in pixels
*/
public void handleSetScrollLeft( Tree tree, JsonObject properties ) {
JsonValue value = properties.get( PROP_SCROLL_LEFT );
if( value != null ) {
int scrollLeft = value.asInt();
getTreeAdapter( tree ).setScrollLeft( scrollLeft );
setScrollBarSelection( tree.getHorizontalBar(), scrollLeft );
}
}
/*
* PROTOCOL SET topItemIndex
*
* @param topItemIndex (int) visual index of the item, which is on the top of the tree
*/
public void handleSetTopItemIndex( Tree tree, JsonObject properties ) {
JsonValue value = properties.get( PROP_TOP_ITEM_INDEX );
if( value != null ) {
int topItemIndex = value.asInt();
getTreeAdapter( tree ).setTopItemIndex( topItemIndex );
int scrollTop = topItemIndex * tree.getItemHeight();
setScrollBarSelection( tree.getVerticalBar(), scrollTop );
}
}
/*
* PROTOCOL CALL renderToolTipText
*
* @param item (string) id of the hovered item
* @param column (int) column index of the hovered cell
*/
public void handleCallRenderToolTipText( Tree tree, JsonObject properties ) {
ICellToolTipAdapter adapter = CellToolTipUtil.getAdapter( tree );
ICellToolTipProvider provider = adapter.getCellToolTipProvider();
if( provider != null ) {
TreeItem item = getItem( tree, properties.get( "item" ).asString() );
int columnIndex = properties.get( "column" ).asInt();
if( item != null && ( columnIndex == 0 || columnIndex < tree.getColumnCount() ) ) {
provider.getToolTipText( item, columnIndex );
}
}
}
/*
* 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
* @param detail (string) "check" if checkbox is selected, "hyperlink" if RWT hyperlink is
* selected
* @param item (string) id of selected item
* @param text (string) the value of href attribute or content of the selected RWT hyperlink
*/
public void handleNotifySelection( Tree tree, JsonObject properties ) {
TreeItem item = getItem( tree, properties.get( EVENT_PARAM_ITEM ).asString() );
if( item != null ) {
Event event = createSelectionEvent( SWT.Selection, properties );
event.item = item;
tree.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
* @param detail (string) "check" is checkbox is selected
* @param item (string) id of selected item
*/
public void handleNotifyDefaultSelection( Tree tree, JsonObject properties ) {
Event event = createSelectionEvent( SWT.DefaultSelection, properties );
event.item = getItem( tree, properties.get( EVENT_PARAM_ITEM ).asString() );
tree.notifyListeners( SWT.DefaultSelection, event );
}
/*
* PROTOCOL NOTIFY Expand
*
* @param item (string) id of expanded item
*/
public void handleNotifyExpand( Tree tree, JsonObject properties ) {
TreeItem item = getItem( tree, properties.get( EVENT_PARAM_ITEM ).asString() );
if( item != null ) {
Event event = new Event();
event.item = item;
tree.notifyListeners( SWT.Expand, event );
}
}
/*
* PROTOCOL NOTIFY Collapse
*
* @param item (string) id of collapsed item
*/
public void handleNotifyCollapse( Tree tree, JsonObject properties ) {
TreeItem item = getItem( tree, properties.get( EVENT_PARAM_ITEM ).asString() );
if( item != null ) {
Event event = new Event();
event.item = item;
tree.notifyListeners( SWT.Collapse, event );
}
}
/*
* PROTOCOL NOTIFY SetData
* ignored, SetData event is fired when set topItemIndex
*/
public void handleNotifySetData() {
}
private static TreeItem getItem( Tree tree, String itemId ) {
TreeItem item = null;
String[] idParts = itemId.split( "#" );
if( idParts.length == 2 ) {
Widget parent = find( tree, idParts[ 0 ] );
if( parent != null ) {
int itemIndex = Integer.parseInt( idParts[ 1 ] );
if( getId( tree ).equals( idParts[ 0 ] ) ) {
item = tree.getItem( itemIndex );
} else {
item = ( ( TreeItem )parent ).getItem( itemIndex );
}
}
} else {
item = ( TreeItem )find( tree, itemId );
}
return item;
}
private static void setScrollBarSelection( ScrollBar scrollBar, int selection ) {
if( scrollBar != null ) {
scrollBar.setSelection( selection );
}
}
@Override
protected boolean allowMouseEvent( Tree tree, int x, int y ) {
return super.allowMouseEvent( tree, x, y ) && y >= tree.getHeaderHeight();
}
private static ITreeAdapter getTreeAdapter( Tree tree ) {
return tree.getAdapter( ITreeAdapter.class );
}
}