/*
* Copyright 2005 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 java.util.List;
import org.drools.guvnor.client.common.DirtyableComposite;
import org.drools.guvnor.client.common.FormStylePopup;
import org.drools.guvnor.client.common.InfoPopup;
import org.drools.guvnor.client.common.SmallLabel;
import org.drools.guvnor.client.common.ValueChanged;
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.FactPattern;
import org.drools.ide.common.client.modeldriven.brl.BaseSingleFieldConstraint;
import org.drools.ide.common.client.modeldriven.brl.RuleModel;
import org.drools.ide.common.client.modeldriven.brl.SingleFieldConstraint;
import com.google.gwt.core.client.GWT;
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.user.client.Command;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.HasVerticalAlignment;
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.Panel;
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.factconstraints.client.customform.CustomFormConfiguration;
import org.drools.guvnor.client.packages.WorkingSetManager;
import org.drools.guvnor.client.resources.Images;
/**
* This is an editor for constraint values.
* How this behaves depends on the constraint value type.
* When the constraint value has no type, it will allow the user to choose the first time.
*
* @author Michael Neale
* @author Fernando Meyer
*/
public class ConstraintValueEditor extends DirtyableComposite {
private Constants constants = ((Constants) GWT.create( Constants.class ));
private static Images images = GWT.create( Images.class );
private final FactPattern pattern;
private final String fieldName;
private final SuggestionCompletionEngine sce;
private final BaseSingleFieldConstraint constraint;
private final Panel panel;
private final RuleModel model;
private final RuleModeller modeller;
private final boolean numericValue;
private DropDownData dropDownData;
private String fieldType;
private boolean readOnly;
private Command onValueChangeCommand;
private boolean isDropDownDataEnum;
public ConstraintValueEditor(FactPattern pattern,
String fieldName,
BaseSingleFieldConstraint con,
RuleModeller modeller,
String valueType,
boolean readOnly) {
this.pattern = pattern;
this.fieldName = fieldName;
this.sce = modeller.getSuggestionCompletions();
this.constraint = con;
this.panel = new SimplePanel();
this.model = modeller.getModel();
this.modeller = modeller;
valueType = sce.getFieldType( pattern.getFactType(),
fieldName );
this.fieldType = valueType;
this.numericValue = SuggestionCompletionEngine.TYPE_NUMERIC.equals( valueType );
this.readOnly = readOnly;
if ( SuggestionCompletionEngine.TYPE_BOOLEAN.equals( valueType ) ) {
this.dropDownData = DropDownData.create( new String[]{"true", "false"} ); //NON-NLS
isDropDownDataEnum = false;
} else {
this.dropDownData = sce.getEnums( pattern,
fieldName );
isDropDownDataEnum = true;
}
refreshEditor();
initWidget( panel );
}
private void refreshEditor() {
panel.clear();
Widget constraintWidget = null;
if ( constraint.getConstraintValueType() == SingleFieldConstraint.TYPE_UNDEFINED ) {
Image clickme = new Image( images.edit() );
clickme.addClickHandler( new ClickHandler() {
public void onClick(ClickEvent event) {
showTypeChoice( (Widget) event.getSource(),
constraint );
}
} );
constraintWidget = clickme;
} else {
switch ( constraint.getConstraintValueType() ) {
case SingleFieldConstraint.TYPE_LITERAL :
case SingleFieldConstraint.TYPE_ENUM :
if ( this.constraint instanceof SingleFieldConstraint ) {
final SingleFieldConstraint con = (SingleFieldConstraint) this.constraint;
CustomFormConfiguration customFormConfiguration = WorkingSetManager.getInstance().getCustomFormConfiguration( modeller.getAsset().metaData.packageName,
pattern.getFactType(),
fieldName );
if ( customFormConfiguration != null ) {
constraintWidget = new Button( con.getValue(),
new ClickHandler() {
public void onClick(ClickEvent event) {
showTypeChoice( (Widget) event.getSource(),
constraint );
}
} );
break;
}
}
if ( this.dropDownData != null ) {
constraintWidget = new EnumDropDownLabel( this.pattern,
this.fieldName,
this.sce,
this.constraint );
((EnumDropDownLabel) constraintWidget).setOnValueChangeCommand( new Command() {
public void execute() {
executeOnValueChangeCommand();
}
} );
} else if ( SuggestionCompletionEngine.TYPE_DATE.equals( this.fieldType ) ) {
DatePickerLabel datePicker = new DatePickerLabel( constraint.getValue() );
// Set the default time
this.constraint.setValue( datePicker.getDateString() );
if ( !this.readOnly ) {
datePicker.addValueChanged( new ValueChanged() {
public void valueChanged(String newValue) {
executeOnValueChangeCommand();
constraint.setValue( newValue );
}
} );
constraintWidget = datePicker;
} else {
constraintWidget = new SmallLabel( this.constraint.getValue() );
}
} else {
if ( !this.readOnly ) {
constraintWidget = new DefaultLiteralEditor( this.constraint,
this.numericValue );
((DefaultLiteralEditor) constraintWidget).setOnValueChangeCommand( new Command() {
public void execute() {
executeOnValueChangeCommand();
}
} );
} else {
constraintWidget = new SmallLabel( this.constraint.getValue() );
}
}
break;
case SingleFieldConstraint.TYPE_RET_VALUE :
constraintWidget = returnValueEditor();
break;
case SingleFieldConstraint.TYPE_EXPR_BUILDER_VALUE :
constraintWidget = expressionEditor();
break;
case SingleFieldConstraint.TYPE_VARIABLE :
constraintWidget = variableEditor();
break;
case BaseSingleFieldConstraint.TYPE_TEMPLATE :
constraintWidget = new DefaultLiteralEditor( this.constraint,
false );
break;
default :
break;
}
}
panel.add( constraintWidget );
}
private Widget variableEditor() {
if ( this.readOnly ) {
return new SmallLabel( this.constraint.getValue() );
}
List<String> vars = this.model.getBoundVariablesInScope( this.constraint );
final ListBox box = new ListBox();
if ( this.constraint.getValue() == null ) {
box.addItem( constants.Choose() );
}
int j = 0;
for ( String var : vars ) {
FactPattern f = model.getBoundFact( var );
String fv = model.getBindingType( var );
if ( (f != null && f.getFactType().equals( this.fieldType )) || (fv != null && fv.equals( this.fieldType )) ) {
box.addItem( var );
if ( this.constraint.getValue() != null && this.constraint.getValue().equals( var ) ) {
box.setSelectedIndex( j );
}
j++;
} else {
// for collection, present the list of possible bound variable
String factCollectionType = sce.getParametricFieldType( pattern.getFactType(),
this.fieldName );
if ( (f != null && factCollectionType != null && f.getFactType().equals( factCollectionType )) || (factCollectionType != null && factCollectionType.equals( fv )) ) {
box.addItem( var );
if ( this.constraint.getValue() != null && this.constraint.getValue().equals( var ) ) {
box.setSelectedIndex( j );
}
j++;
}
}
}
box.addChangeHandler( new ChangeHandler() {
public void onChange(ChangeEvent event) {
executeOnValueChangeCommand();
constraint.setValue( box.getItemText( box.getSelectedIndex() ) );
}
} );
return box;
}
/**
* An editor for the retval "formula" (expression).
*/
private Widget returnValueEditor() {
TextBox box = new BoundTextBox( constraint );
String msg = constants.FormulaEvaluateToAValue();
Image img = new Image( images.functionAssets() );
img.setTitle( msg );
box.setTitle( msg );
box.addChangeHandler( new ChangeHandler() {
public void onChange(ChangeEvent event) {
executeOnValueChangeCommand();
}
} );
Widget ed = widgets( img,
box );
return ed;
}
private Widget expressionEditor() {
if ( !(this.constraint instanceof SingleFieldConstraint) ) {
throw new IllegalArgumentException( "Expected SingleFieldConstraint, but " + constraint.getClass().getName() + " found." );
}
ExpressionBuilder builder = new ExpressionBuilder( this.modeller,
((SingleFieldConstraint) this.constraint).getExpressionValue() );
builder.addExpressionTypeChangeHandler( new ExpressionTypeChangeHandler() {
public void onExpressionTypeChanged(ExpressionTypeChangeEvent event) {
System.out.println( "type changed: " + event.getOldType() + " -> " + event.getNewType() );
}
} );
builder.addOnModifiedCommand( new Command() {
public void execute() {
executeOnValueChangeCommand();
}
} );
Widget ed = widgets( new HTML( " " ),
builder );
return ed;
}
/**
* Show a list of possibilities for the value type.
*/
private void showTypeChoice(Widget w,
final BaseSingleFieldConstraint con) {
CustomFormConfiguration customFormConfiguration = WorkingSetManager.getInstance().getCustomFormConfiguration( modeller.getAsset().metaData.packageName,
pattern.getFactType(),
fieldName );
if ( customFormConfiguration != null ) {
if ( !(con instanceof SingleFieldConstraint) ) {
Window.alert( "Unexpected constraint type!" );
return;
}
final CustomFormPopUp customFormPopUp = new CustomFormPopUp( images.newexWiz(),
constants.FieldValue(),
customFormConfiguration );
final SingleFieldConstraint sfc = (SingleFieldConstraint) con;
customFormPopUp.addOkButtonHandler( new ClickHandler() {
public void onClick(ClickEvent event) {
sfc.setConstraintValueType( SingleFieldConstraint.TYPE_LITERAL );
sfc.setId( customFormPopUp.getFormId() );
sfc.setValue( customFormPopUp.getFormValue() );
doTypeChosen( customFormPopUp );
}
} );
customFormPopUp.show( sfc.getId(),
sfc.getValue() );
return;
}
final FormStylePopup form = new FormStylePopup( images.newexWiz(),
constants.FieldValue() );
Button lit = new Button( constants.LiteralValue() );
lit.addClickHandler( new ClickHandler() {
public void onClick(ClickEvent event) {
con.setConstraintValueType( isDropDownDataEnum ? SingleFieldConstraint.TYPE_ENUM : SingleFieldConstraint.TYPE_LITERAL );
doTypeChosen( form );
}
} );
form.addAttribute( constants.LiteralValue() + ":",
widgets( lit,
new InfoPopup( constants.LiteralValue(),
constants.LiteralValTip() ) ) );
if ( modeller.isTemplate() ) {
String templateKeyLabel = constants.TemplateKey();
Button templateKeyButton = new Button( templateKeyLabel );
templateKeyButton.addClickHandler( new ClickHandler() {
public void onClick(ClickEvent event) {
con.setConstraintValueType( BaseSingleFieldConstraint.TYPE_TEMPLATE );
doTypeChosen( form );
}
} );
form.addAttribute( templateKeyLabel + ":",
widgets( templateKeyButton,
new InfoPopup( templateKeyLabel,
constants.LiteralValTip() ) ) );
}
form.addRow( new HTML( "<hr/>" ) );
form.addRow( new SmallLabel( constants.AdvancedOptions() ) );
//only want to show variables if we have some !
if ( this.model.getBoundVariablesInScope( this.constraint ).size() > 0 || SuggestionCompletionEngine.TYPE_COLLECTION.equals( this.fieldType ) ) {
List<String> vars = this.model.getBoundFacts();
boolean foundABouncVariableThatMatches = false;
for ( String var : vars ) {
FactPattern f = model.getBoundFact( var );
String fieldConstraint = model.getBindingType( var );
if ( (f != null && f.getFactType() != null && f.getFactType().equals( this.fieldType )) || (this.fieldType != null && this.fieldType.equals( fieldConstraint )) ) {
foundABouncVariableThatMatches = true;
break;
} else {
// for collection, present the list of possible bound variable
String factCollectionType = sce.getParametricFieldType( pattern.getFactType(),
this.fieldName );
if ( (f != null && factCollectionType != null && f.getFactType().equals( factCollectionType )) || (factCollectionType != null && factCollectionType.equals( fieldConstraint )) ) {
foundABouncVariableThatMatches = true;
break;
}
}
}
if ( foundABouncVariableThatMatches ) {
Button variable = new Button( constants.BoundVariable() );
variable.addClickHandler( new ClickHandler() {
public void onClick(ClickEvent event) {
con.setConstraintValueType( SingleFieldConstraint.TYPE_VARIABLE );
doTypeChosen( form );
}
} );
form.addAttribute( constants.AVariable(),
widgets( variable,
new InfoPopup( constants.ABoundVariable(),
constants.BoundVariableTip() ) ) );
}
}
Button formula = new Button( constants.NewFormula() );
formula.addClickHandler( new ClickHandler() {
public void onClick(ClickEvent event) {
con.setConstraintValueType( SingleFieldConstraint.TYPE_RET_VALUE );
doTypeChosen( form );
}
} );
form.addAttribute( constants.AFormula() + ":",
widgets( formula,
new InfoPopup( constants.AFormula(),
constants.FormulaExpressionTip() ) ) );
Button expression = new Button( constants.ExpressionEditor() );
expression.addClickHandler( new ClickHandler() {
public void onClick(ClickEvent event) {
con.setConstraintValueType( SingleFieldConstraint.TYPE_EXPR_BUILDER_VALUE );
doTypeChosen( form );
}
} );
form.addAttribute( constants.ExpressionEditor() + ":",
widgets( expression,
new InfoPopup( constants.ExpressionEditor(),
constants.ExpressionEditor() ) ) );
form.show();
}
private void doTypeChosen(final FormStylePopup form) {
executeOnValueChangeCommand();
refreshEditor();
form.hide();
}
private Panel widgets(Widget left,
Widget right) {
HorizontalPanel panel = new HorizontalPanel();
panel.setVerticalAlignment( HasVerticalAlignment.ALIGN_MIDDLE );
panel.add( left );
panel.add( right );
panel.setWidth( "100%" );
return panel;
}
private void executeOnValueChangeCommand() {
if ( this.onValueChangeCommand != null ) {
this.onValueChangeCommand.execute();
}
}
public boolean isDirty() {
return super.isDirty();
}
public void setOnValueChangeCommand(Command onValueChangeCommand) {
this.onValueChangeCommand = onValueChangeCommand;
}
}