/*
* Copyright 2010 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.guvnor.client.modeldriven.ui;
import org.drools.guvnor.client.common.DropDownValueChanged;
import org.drools.guvnor.client.messages.Constants;
import org.drools.ide.common.client.modeldriven.DropDownData;
import org.drools.ide.common.client.modeldriven.SuggestionCompletionEngine;
import org.drools.ide.common.client.modeldriven.brl.BaseSingleFieldConstraint;
import org.drools.ide.common.client.modeldriven.brl.ConnectiveConstraint;
import org.drools.ide.common.client.modeldriven.brl.FactPattern;
import org.drools.ide.common.client.modeldriven.brl.SingleFieldConstraintEBLeftSide;
import com.google.gwt.core.client.GWT;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.user.client.Command;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.Panel;
import com.google.gwt.user.client.ui.PopupPanel;
public class EnumDropDownLabel extends Composite {
private Constants constants = ((Constants) GWT.create( Constants.class ));
protected Panel panel = new HorizontalPanel();
// The value is not always same as the text
private final Label textWidget;
private final EnumDropDown enumDropDown;
private final Button okButton = new Button( constants.OK() );
private Command onValueChangeCommand;
public EnumDropDownLabel(FactPattern pattern,
String fieldName,
SuggestionCompletionEngine sce,
BaseSingleFieldConstraint constraint,
boolean enabled) {
this.textWidget = getTextLabel( enabled );
this.enumDropDown = getEnumDropDown( constraint,
sce,
pattern,
fieldName );
this.enumDropDown.setEnabled( enabled );
panel.add( textWidget );
initWidget( panel );
}
private Label getTextLabel(boolean enabled) {
Label label = new Label();
label.setStyleName( "form-field" );
if ( enabled ) {
label.addClickHandler( new ClickHandler() {
public void onClick(ClickEvent event) {
showPopup();
}
} );
}
if ( label.getText() == null && "".equals( label.getText() ) ) {
label.setText( constants.Value() );
}
return label;
}
private void showPopup() {
final PopupPanel popup = new PopupPanel();
popup.setGlassEnabled( true );
HorizontalPanel horizontalPanel = new HorizontalPanel();
popup.setPopupPosition( this.getAbsoluteLeft(),
this.getAbsoluteTop() );
okButton.addClickHandler( new ClickHandler() {
public void onClick(ClickEvent event) {
executeOnValueChangeCommand();
panel.clear();
panel.add( textWidget );
popup.hide();
}
} );
horizontalPanel.add( enumDropDown );
horizontalPanel.add( okButton );
popup.add( horizontalPanel );
popup.show();
}
private EnumDropDown getEnumDropDown(final BaseSingleFieldConstraint constraint,
SuggestionCompletionEngine sce,
FactPattern pattern,
String fieldName) {
String valueType;
if ( constraint instanceof SingleFieldConstraintEBLeftSide ) {
SingleFieldConstraintEBLeftSide sfexp = (SingleFieldConstraintEBLeftSide) constraint;
valueType = sfexp.getExpressionLeftSide().getGenericType();
} else if ( constraint instanceof ConnectiveConstraint ) {
ConnectiveConstraint cc = (ConnectiveConstraint) constraint;
valueType = cc.getFieldType();
} else {
valueType = sce.getFieldType( pattern.getFactType(),
fieldName );
}
final DropDownData dropDownData;
if ( SuggestionCompletionEngine.TYPE_BOOLEAN.equals( valueType ) ) {
dropDownData = DropDownData.create( new String[]{"true", "false"} ); //NON-NLS
} else {
dropDownData = sce.getEnums( pattern,
fieldName );
}
final EnumDropDown box = new EnumDropDown( constraint.getValue(),
new DropDownValueChanged() {
public void valueChanged(String newText,
String newValue) {
textWidget.setText( newText );
constraint.setValue( newValue );
okButton.click();
}
},
dropDownData );
if ( box.getItemCount() > 6 ) {
box.setVisibleItemCount( 6 );
} else {
box.setVisibleItemCount( box.getItemCount() );
}
return box;
}
private void executeOnValueChangeCommand() {
if ( this.onValueChangeCommand != null ) {
this.onValueChangeCommand.execute();
}
}
public void setOnValueChangeCommand(Command onValueChangeCommand) {
this.onValueChangeCommand = onValueChangeCommand;
}
}