/*
* 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.guided.rule.client.editor;
import java.util.ArrayList;
import java.util.List;
import com.google.gwt.event.dom.client.ChangeEvent;
import com.google.gwt.event.dom.client.ChangeHandler;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.dom.client.KeyUpEvent;
import com.google.gwt.event.dom.client.KeyUpHandler;
import com.google.gwt.event.logical.shared.ValueChangeEvent;
import com.google.gwt.event.logical.shared.ValueChangeHandler;
import com.google.gwt.user.client.Command;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Image;
import com.google.gwt.user.client.ui.ListBox;
import com.google.gwt.user.client.ui.SimplePanel;
import com.google.gwt.user.client.ui.TextBox;
import com.google.gwt.user.client.ui.Widget;
import org.drools.workbench.models.datamodel.oracle.DataType;
import org.drools.workbench.models.datamodel.oracle.DropDownData;
import org.drools.workbench.models.datamodel.rule.ActionFieldFunction;
import org.drools.workbench.models.datamodel.rule.FieldNatureType;
import org.drools.workbench.screens.guided.rule.client.editor.util.SuperTypeMatcher;
import org.drools.workbench.screens.guided.rule.client.resources.GuidedRuleEditorResources;
import org.drools.workbench.screens.guided.rule.client.resources.images.GuidedRuleEditorImages508;
import org.drools.workbench.screens.guided.rule.client.widget.EnumDropDown;
import org.kie.uberfire.client.common.DirtyableComposite;
import org.kie.uberfire.client.common.DropDownValueChanged;
import org.kie.uberfire.client.common.InfoPopup;
import org.kie.uberfire.client.common.SmallLabel;
import org.kie.uberfire.client.common.popups.FormStylePopup;
import org.kie.workbench.common.widgets.client.datamodel.AsyncPackageDataModelOracle;
import org.kie.workbench.common.widgets.client.widget.TextBoxFactory;
import org.uberfire.client.callbacks.Callback;
/**
* This provides for editing of fields in the RHS of a rule.
*/
public class MethodParameterValueEditor
extends DirtyableComposite {
private AsyncPackageDataModelOracle oracle;
private ActionFieldFunction methodParameter;
private DropDownData enums;
private SimplePanel root = new SimplePanel();
private RuleModeller modeller = null;
private String parameterType = null;
private Command onValueChangeCommand = null;
public MethodParameterValueEditor( final AsyncPackageDataModelOracle oracle,
final ActionFieldFunction val,
final DropDownData enums,
final RuleModeller modeller,
final Command onValueChangeCommand ) {
this.oracle = oracle;
this.methodParameter = val;
this.modeller = modeller;
this.parameterType = val.getType();
this.onValueChangeCommand = onValueChangeCommand;
setEnums( enums );
refresh();
initWidget( root );
}
private void setEnums( DropDownData enums ) {
if ( methodParameter.getType().equals( DataType.TYPE_BOOLEAN ) ) {
this.enums = DropDownData.create( new String[]{ "true", "false" } );
} else {
this.enums = enums;
}
}
private void refresh() {
root.clear();
if ( enums != null && ( enums.getFixedList() != null || enums.getQueryExpression() != null ) ) {
root.add( new EnumDropDown( methodParameter.getValue(),
new DropDownValueChanged() {
public void valueChanged( String newText,
String newValue ) {
setMethodParameterValue( newValue );
}
},
enums,
modeller.getPath() ) );
} else {
if ( methodParameter.getNature() == FieldNatureType.TYPE_UNDEFINED && methodParameter.getValue() == null ) {
// we have a blank slate..
// have to give them a choice
root.add( choice() );
} else {
if ( methodParameter.getNature() == FieldNatureType.TYPE_VARIABLE ) {
root.add( boundVariable() );
} else if ( methodParameter.getNature() == FieldNatureType.TYPE_FORMULA ) {
root.add( boundFormulaTextBox() );
} else {
root.add( boundLiteralTextBox() );
}
}
}
}
private ListBox boundVariable() {
BoundListBox boundListBox = new BoundListBox( modeller,
methodParameter,
new SuperTypeMatcher( oracle ) );
boundListBox.addChangeHandler( new ChangeHandler() {
public void onChange( ChangeEvent event ) {
ListBox w = (ListBox) event.getSource();
setMethodParameterValue( w.getValue( w.getSelectedIndex() ) );
refresh();
}
} );
return boundListBox;
}
private TextBox boundLiteralTextBox() {
final TextBox box = TextBoxFactory.getTextBox( methodParameter.getType() );
// We need both handlers, since The textbox TextBoxFactory can return a box that changes the value in itself
box.addValueChangeHandler( new ValueChangeHandler<String>() {
@Override
public void onValueChange( ValueChangeEvent<String> event ) {
setMethodParameterValue( box.getValue() );
}
} );
box.addKeyUpHandler( new KeyUpHandler() {
@Override
public void onKeyUp( KeyUpEvent event ) {
setMethodParameterValue( box.getValue() );
}
} );
box.setStyleName( "constraint-value-Editor" );
if ( this.methodParameter.getValue() != null || this.methodParameter.getValue().isEmpty() ) {
box.setValue( this.methodParameter.getValue() );
}
// This updates the model
setMethodParameterValue( box.getValue() );
return box;
}
private TextBox boundFormulaTextBox() {
final TextBox box = new TextBox();
box.setStyleName( "constraint-value-Editor" );
if ( this.methodParameter.getValue() == null ) {
box.setValue( "" );
} else {
box.setValue( this.methodParameter.getValue() );
}
box.addKeyUpHandler( new KeyUpHandler() {
@Override
public void onKeyUp( KeyUpEvent event ) {
setMethodParameterValue( box.getValue() );
}
} );
return box;
}
private void setMethodParameterValue( String value ) {
methodParameter.setValue( value );
if ( onValueChangeCommand != null ) {
onValueChangeCommand.execute();
}
makeDirty();
}
private Widget choice() {
Image clickme = GuidedRuleEditorImages508.INSTANCE.Edit();
clickme.addClickHandler( new ClickHandler() {
public void onClick( ClickEvent event ) {
showTypeChoice();
}
} );
return clickme;
}
protected void showTypeChoice() {
final FormStylePopup form = new FormStylePopup( GuidedRuleEditorImages508.INSTANCE.Wizard(),
GuidedRuleEditorResources.CONSTANTS.FieldValue() );
//Literal values
Button lit = new Button( GuidedRuleEditorResources.CONSTANTS.LiteralValue() );
lit.addClickHandler( new ClickHandler() {
public void onClick( ClickEvent event ) {
methodParameter.setNature( FieldNatureType.TYPE_LITERAL );
methodParameter.setValue( "" );
makeDirty();
refresh();
form.hide();
}
} );
form.addAttribute( GuidedRuleEditorResources.CONSTANTS.LiteralValue() + ":",
widgets( lit,
new InfoPopup( GuidedRuleEditorResources.CONSTANTS.Literal(),
GuidedRuleEditorResources.CONSTANTS.LiteralValTip() ) ) );
canTheVariableButtonBeShown( new Callback<Boolean>() {
@Override
public void callback( Boolean result ) {
if ( result ) {
addBoundVariableButton( form );
form.addRow( new HTML( "<hr/>" ) );
form.addRow( new SmallLabel( GuidedRuleEditorResources.CONSTANTS.AdvancedSection() ) );
}
//Formulas
Button formula = new Button( GuidedRuleEditorResources.CONSTANTS.NewFormula() );
formula.addClickHandler( new ClickHandler() {
public void onClick( ClickEvent event ) {
methodParameter.setNature( FieldNatureType.TYPE_FORMULA );
makeDirty();
refresh();
form.hide();
}
} );
form.addAttribute( GuidedRuleEditorResources.CONSTANTS.AFormula() + ":",
widgets( formula,
new InfoPopup( GuidedRuleEditorResources.CONSTANTS.AFormula(),
GuidedRuleEditorResources.CONSTANTS.FormulaExpressionTip() ) ) );
form.show();
}
} );
}
private void addBoundVariableButton( final FormStylePopup form ) {
form.addRow( new HTML( "<hr/>" ) );
form.addRow( new SmallLabel( GuidedRuleEditorResources.CONSTANTS.AdvancedSection() ) );
Button variableButton = new Button( GuidedRuleEditorResources.CONSTANTS.BoundVariable() );
form.addAttribute( GuidedRuleEditorResources.CONSTANTS.BoundVariable() + ":",
variableButton );
variableButton.addClickHandler( new ClickHandler() {
public void onClick( ClickEvent event ) {
methodParameter.setNature( FieldNatureType.TYPE_VARIABLE );
methodParameter.setValue( "=" );
makeDirty();
refresh();
form.hide();
}
} );
}
private void canTheVariableButtonBeShown( final Callback<Boolean> callback ) {
List<String> factTypes = new ArrayList<String>();
for ( String variable : modeller.getModel().getAllVariables() ) {
String factType = getFactType( variable );
factTypes.add( factType );
if ( factType.equals( this.parameterType ) ) {
callback.callback( true );
return;
}
}
new SuperTypeMatcher( oracle ).isThereAMatchingSuperType( factTypes,
parameterType,
callback );
}
private String getFactType( String variable ) {
if ( modeller.getModel().getRHSBoundFacts().contains( variable ) == false ) {
return modeller.getModel().getLHSBindingType( variable );
} else {
return modeller.getModel().getRHSBoundFact( variable ).getFactType();
}
}
private Widget widgets( Button lit,
InfoPopup popup ) {
HorizontalPanel h = new HorizontalPanel();
h.add( lit );
h.add( popup );
return h;
}
}