/*
* Copyright 2012 JBoss Inc
*
* Licensed 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.drools.workbench.screens.drltext.client.widget;
import java.util.List;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.logical.shared.OpenEvent;
import com.google.gwt.event.logical.shared.OpenHandler;
import com.google.gwt.event.logical.shared.SelectionEvent;
import com.google.gwt.event.logical.shared.SelectionHandler;
import com.google.gwt.user.client.ui.AbstractImagePrototype;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Tree;
import com.google.gwt.user.client.ui.TreeItem;
import com.google.gwt.user.client.ui.VerticalPanel;
import org.drools.workbench.screens.drltext.client.editor.DRLEditorPresenter;
import org.drools.workbench.screens.drltext.client.resources.DRLTextEditorResources;
import org.drools.workbench.screens.drltext.client.resources.i18n.DRLTextEditorConstants;
import org.kie.workbench.common.widgets.client.callbacks.Callback;
import org.kie.workbench.common.widgets.client.resources.i18n.CommonConstants;
import org.uberfire.client.common.ClickableLabel;
import org.uberfire.client.common.SmallLabel;
import org.uberfire.client.common.Util;
import org.uberfire.client.mvp.UberView;
public class FactTypeBrowserWidget
extends Composite implements UberView<DRLEditorPresenter> {
private static final String LAZY_LOAD = CommonConstants.INSTANCE.Loading();
private DRLEditorPresenter presenter;
private final Tree tree;
public FactTypeBrowserWidget( final ClickEvent ev ) {
this.tree = new Tree();
final VerticalPanel panel = new VerticalPanel();
final HorizontalPanel hpFactsAndHide = new HorizontalPanel();
final HorizontalPanel hpShow = new HorizontalPanel();
hpShow.add( new ClickableLabel( DRLTextEditorConstants.INSTANCE.ShowFactTypes(),
new ClickHandler() {
public void onClick( com.google.gwt.event.dom.client.ClickEvent event ) {
hpShow.setVisible( false );
hpFactsAndHide.setVisible( true );
tree.setVisible( true );
}
} ) );
panel.add( hpShow );
hpFactsAndHide.add( new SmallLabel( DRLTextEditorConstants.INSTANCE.FactTypes() ) );
hpFactsAndHide.add( new ClickableLabel( DRLTextEditorConstants.INSTANCE.hide(),
new ClickHandler() {
public void onClick( com.google.gwt.event.dom.client.ClickEvent event ) {
hpShow.setVisible( true );
hpFactsAndHide.setVisible( false );
tree.setVisible( false );
}
} ) );
panel.add( hpFactsAndHide );
panel.add( tree );
tree.setStyleName( DRLTextEditorResources.INSTANCE.CSS().categoryExplorerTree() );
tree.addSelectionHandler( new SelectionHandler<TreeItem>() {
public void onSelection( SelectionEvent<TreeItem> event ) {
Object o = event.getSelectedItem().getUserObject();
if ( o instanceof ClassUserObject ) {
ev.selected( ( (ClassUserObject) o ).textToInsert );
} else if ( o instanceof String ) {
ev.selected( (String) o );
}
}
} );
tree.addOpenHandler( new OpenHandler<TreeItem>() {
@Override
public void onOpen( final OpenEvent<TreeItem> event ) {
final TreeItem item = event.getTarget();
if ( needsLoading( item ) ) {
final Object userObject = event.getTarget().getUserObject();
presenter.loadClassFields( ( (ClassUserObject) userObject ).fullyQualifiedClassName,
new Callback<List<String>>() {
@Override
public void callback( final List<String> fields ) {
item.getChild( 0 ).remove();
if ( fields != null ) {
for ( String field : fields ) {
final TreeItem fi = new TreeItem();
fi.setHTML( AbstractImagePrototype.create( DRLTextEditorResources.INSTANCE.images().fieldImage() ).getHTML()
+ "<small>"
+ field + "</small>" );
fi.setUserObject( field );
item.addItem( fi );
}
}
}
} );
}
}
} );
tree.setVisible( false );
hpFactsAndHide.setVisible( false );
hpShow.setVisible( true );
initWidget( panel );
}
@Override
public void init( final DRLEditorPresenter presenter ) {
this.presenter = presenter;
}
public void setFullyQualifiedClassNames( final List<String> fullyQualifiedClassNames ) {
if ( tree.getItem( 0 ) != null ) {
tree.clear();
}
if ( fullyQualifiedClassNames != null ) {
for ( String type : fullyQualifiedClassNames ) {
final TreeItem it = new TreeItem();
it.setHTML( AbstractImagePrototype.create( DRLTextEditorResources.INSTANCE.images().classImage() ).getHTML()
+ "<small>"
+ type + "</small>" );
it.setUserObject( new ClassUserObject( type + "( )",
type ) );
tree.addItem( it );
it.addItem( Util.toSafeHtml( LAZY_LOAD ) );
}
}
}
private boolean needsLoading( final TreeItem item ) {
return item.getChildCount() == 1 && LAZY_LOAD.equals( item.getChild( 0 ).getText() );
}
public static interface ClickEvent {
public void selected( String text );
}
private static class ClassUserObject {
private String textToInsert;
private String fullyQualifiedClassName;
ClassUserObject( final String textToInsert,
final String fullyQualifiedClassName ) {
this.textToInsert = textToInsert;
this.fullyQualifiedClassName = fullyQualifiedClassName;
}
}
}