/*
* 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 java.util.List;
import org.drools.guvnor.client.common.DirtyableComposite;
import org.drools.guvnor.client.common.DropDownValueChanged;
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.messages.Constants;
import org.drools.guvnor.client.resources.Images;
import org.drools.guvnor.client.util.NumbericFilterKeyPressHandler;
import org.drools.ide.common.client.modeldriven.DropDownData;
import org.drools.ide.common.client.modeldriven.FieldNature;
import org.drools.ide.common.client.modeldriven.SuggestionCompletionEngine;
import org.drools.ide.common.client.modeldriven.brl.ActionFieldFunction;
import org.drools.ide.common.client.modeldriven.brl.ActionFieldValue;
import org.drools.ide.common.client.modeldriven.brl.ActionInsertFact;
import org.drools.ide.common.client.modeldriven.brl.FactPattern;
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.event.dom.client.KeyUpEvent;
import com.google.gwt.event.dom.client.KeyUpHandler;
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;
/**
* This provides for editing of fields in the RHS of a rule.
*
* @author Nicolas Heron
*
*/
public class MethodParameterValueEditor extends DirtyableComposite {
private Constants constants = GWT.create( Constants.class );
private static Images images = GWT.create( Images.class );
private ActionFieldFunction methodParameter;
private DropDownData enums;
private SimplePanel root;
private RuleModeller model = null;
private String parameterType = null;
private Command onValueChangeCommand = null;
public MethodParameterValueEditor(final ActionFieldFunction val,
final DropDownData enums,
RuleModeller model,
String parameterType,
Command onValueChangeCommand) {
if ( val.type.equals( SuggestionCompletionEngine.TYPE_BOOLEAN ) ) {
this.enums = DropDownData.create( new String[]{"true", "false"} );
} else {
this.enums = enums;
}
this.root = new SimplePanel();
this.methodParameter = val;
this.model = model;
this.parameterType = parameterType;
this.onValueChangeCommand = onValueChangeCommand;
refresh();
initWidget( root );
}
private void refresh() {
root.clear();
if ( enums != null && (enums.fixedList != null || enums.queryExpression != null) ) {
root.add( new EnumDropDown( methodParameter.value,
new DropDownValueChanged() {
public void valueChanged(String newText,
String newValue) {
methodParameter.value = newValue;
if ( onValueChangeCommand != null ) {
onValueChangeCommand.execute();
}
makeDirty();
}
},
enums ) );
} else {
if ( methodParameter.nature == FieldNature.TYPE_UNDEFINED ) {
// we have a blank slate..
// have to give them a choice
root.add( choice() );
} else {
if ( methodParameter.nature == FieldNature.TYPE_VARIABLE ) {
ListBox list = boundVariable( methodParameter );
root.add( list );
} else {
TextBox box = boundTextBox( this.methodParameter );
root.add( box );
}
}
}
}
private ListBox boundVariable(final FieldNature c) {
/*
* If there is a bound variable that is the same type of the current
* variable type, then propose a list
*/
ListBox listVariable = new ListBox();
List<String> vars = model.getModel().getBoundFacts();
for ( String v : vars ) {
FactPattern factPattern = model.getModel().getBoundFact( v );
if ( factPattern.factType.equals( this.methodParameter.type ) ) {
// First selection is empty
if ( listVariable.getItemCount() == 0 ) {
listVariable.addItem( "..." );
}
listVariable.addItem( v );
}
}
/*
* add the bound variable of the rhs
*/
List<String> vars2 = model.getModel().getRhsBoundFacts();
for ( String v : vars2 ) {
ActionInsertFact factPattern = model.getModel().getRhsBoundFact( v );
if ( factPattern.factType.equals( this.methodParameter.type ) ) {
// First selection is empty
if ( listVariable.getItemCount() == 0 ) {
listVariable.addItem( "..." );
}
listVariable.addItem( v );
}
}
if ( methodParameter.value.equals( "=" ) ) {
listVariable.setSelectedIndex( 0 );
} else {
for ( int i = 0; i < listVariable.getItemCount(); i++ ) {
if ( listVariable.getItemText( i ).equals( methodParameter.value ) ) {
listVariable.setSelectedIndex( i );
}
}
}
if ( listVariable.getItemCount() > 0 ) {
listVariable.addChangeHandler( new ChangeHandler() {
public void onChange(ChangeEvent event) {
ListBox w = (ListBox) event.getSource();
methodParameter.value = w.getValue( w.getSelectedIndex() );
if ( onValueChangeCommand != null ) {
onValueChangeCommand.execute();
}
makeDirty();
refresh();
}
} );
}
return listVariable;
}
private TextBox boundTextBox(final ActionFieldValue c) {
final TextBox box = new TextBox();
box.setStyleName( "constraint-value-Editor" );
if ( c.value == null ) {
box.setText( "" );
} else {
if ( c.value.trim().equals( "" ) ) {
c.value = "";
}
box.setText( c.value );
}
if ( c.value == null || c.value.length() < 5 ) {
box.setVisibleLength( 6 );
} else {
box.setVisibleLength( c.value.length() - 1 );
}
box.addChangeHandler( new ChangeHandler() {
public void onChange(ChangeEvent event) {
c.value = box.getText();
if ( onValueChangeCommand != null ) {
onValueChangeCommand.execute();
}
makeDirty();
}
} );
box.addKeyUpHandler( new KeyUpHandler() {
public void onKeyUp(KeyUpEvent event) {
box.setVisibleLength( box.getText().length() );
}
} );
if ( methodParameter.type.equals( SuggestionCompletionEngine.TYPE_NUMERIC ) ) {
box.addKeyPressHandler( new NumbericFilterKeyPressHandler( box ) );
}
return box;
}
private Widget choice() {
Image clickme = new Image( images.edit() );
clickme.addClickHandler( new ClickHandler() {
public void onClick(ClickEvent event) {
showTypeChoice( (Widget) event.getSource() );
}
} );
return clickme;
}
protected void showTypeChoice(Widget w) {
final FormStylePopup form = new FormStylePopup( images.newexWiz(),
constants.FieldValue() );
Button lit = new Button( constants.LiteralValue() );
lit.addClickHandler( new ClickHandler() {
public void onClick(ClickEvent event) {
methodParameter.nature = FieldNature.TYPE_LITERAL;
methodParameter.value = " ";
makeDirty();
refresh();
form.hide();
}
} );
form.addAttribute( constants.LiteralValue() + ":",
widgets( lit,
new InfoPopup( constants.Literal(),
constants.LiteralValTip() ) ) );
form.addRow( new HTML( "<hr/>" ) );
form.addRow( new SmallLabel( constants.AdvancedSection() ) );
/*
* If there is a bound variable that is the same type of the current
* variable type, then show abutton
*/
List<String> vars = model.getModel().getBoundFacts();
List<String> vars2 = model.getModel().getRhsBoundFacts();
for ( String i : vars2 ) {
vars.add( i );
}
for ( String v : vars ) {
boolean createButton = false;
Button variable = new Button( constants.BoundVariable() );
if ( vars2.contains( v ) == false ) {
FactPattern factPattern = model.getModel().getBoundFact( v );
if ( factPattern.factType.equals( this.parameterType ) ) {
createButton = true;
}
} else {
ActionInsertFact factPattern = model.getModel().getRhsBoundFact( v );
if ( factPattern.factType.equals( this.parameterType ) ) {
createButton = true;
}
}
if ( createButton == true ) {
form.addAttribute( constants.BoundVariable() + ":",
variable );
variable.addClickHandler( new ClickHandler() {
public void onClick(ClickEvent event) {
methodParameter.nature = FieldNature.TYPE_VARIABLE;
methodParameter.value = "=";
makeDirty();
refresh();
form.hide();
}
} );
break;
}
}
form.show();
}
private Widget widgets(Button lit,
InfoPopup popup) {
HorizontalPanel h = new HorizontalPanel();
h.add( lit );
h.add( popup );
return h;
}
}