Java tutorial
/* * 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.kie.guvnor.guided.rule.client.widget; 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.shared.EventBus; import com.google.gwt.user.client.Command; import com.google.gwt.user.client.Window; import com.google.gwt.user.client.ui.HTML; import com.google.gwt.user.client.ui.Image; import com.google.gwt.user.client.ui.ListBox; import com.google.gwt.user.client.ui.Widget; import org.drools.guvnor.models.commons.shared.rule.FactPattern; import org.drools.guvnor.models.commons.shared.rule.FromCompositeFactPattern; import org.kie.guvnor.commons.ui.client.resources.HumanReadable; import org.kie.guvnor.datamodel.oracle.DataModelOracle; import org.kie.guvnor.guided.rule.client.editor.RuleModeller; import org.kie.guvnor.guided.rule.client.resources.i18n.Constants; import org.kie.guvnor.guided.rule.client.resources.images.GuidedRuleEditorImages508; import org.uberfire.client.common.ClickableLabel; import org.uberfire.client.common.DirtyableFlexTable; import org.uberfire.client.common.DirtyableHorizontalPane; import org.uberfire.client.common.FormStylePopup; public class FromCompositeFactPatternWidget extends RuleModellerWidget { protected FromCompositeFactPattern pattern; protected DirtyableFlexTable layout; protected boolean readOnly; protected boolean isFactTypeKnown; public FromCompositeFactPatternWidget(RuleModeller modeller, EventBus eventBus, FromCompositeFactPattern pattern) { this(modeller, eventBus, pattern, null); } public FromCompositeFactPatternWidget(RuleModeller modeller, EventBus eventBus, FromCompositeFactPattern pattern, Boolean readOnly) { super(modeller, eventBus); this.pattern = pattern; //if readOnly is null, the readOnly attribute is calculated. if (readOnly == null) { this.calculateReadOnly(); } else { this.readOnly = readOnly; this.isFactTypeKnown = true; } this.layout = new DirtyableFlexTable(); if (this.readOnly) { this.layout.addStyleName("editor-disabled-widget"); } this.layout.addStyleName("model-builderInner-Background"); doLayout(); initWidget(layout); } protected void doLayout() { int row = 0; if (pattern.getFactPattern() != null) { FactPattern fact = pattern.getFactPattern(); if (fact != null) { this.layout.setWidget(row++, 0, createFactPatternWidget(fact)); } } this.layout.setWidget(row++, 0, getCompositeLabel()); } private Widget createFactPatternWidget(FactPattern fact) { FactPatternWidget factPatternWidget; if (this.readOnly) { //creates a new read-only FactPatternWidget factPatternWidget = new FactPatternWidget(this.getModeller(), this.getEventBus(), fact, false, true); //this.layout.setWidget( 0, 0, factPatternWidget ); return factPatternWidget; } else { factPatternWidget = new FactPatternWidget(this.getModeller(), this.getEventBus(), fact, true, false); factPatternWidget.addOnModifiedCommand(new Command() { public void execute() { setModified(true); } }); //this.layout.setWidget( 0, 0, addRemoveButton( factPatternWidget, createClickHandlerForAddRemoveButton() ) ); return addRemoveButton(factPatternWidget, createClickHandlerForAddRemoveButton()); } } private ClickHandler createClickHandlerForAddRemoveButton() { return new ClickHandler() { public void onClick(ClickEvent event) { if (Window.confirm(Constants.INSTANCE.RemoveThisEntireConditionQ())) { setModified(true); pattern.setFactPattern(null); getModeller().refreshWidget(); } } }; } protected Widget getCompositeLabel() { ClickHandler click = new ClickHandler() { public void onClick(ClickEvent event) { Widget w = (Widget) event.getSource(); showFactTypeSelector(w); } }; String lbl = "<div class='form-field'>" + HumanReadable.getCEDisplayName("from") + "</div>"; DirtyableFlexTable panel = new DirtyableFlexTable(); int r = 0; if (pattern.getFactPattern() == null) { panel.setWidget(r, 0, new ClickableLabel( "<br> <font color='red'>" + Constants.INSTANCE.clickToAddPatterns() + "</font>", click, !this.readOnly)); r++; } panel.setWidget(r, 0, new HTML(lbl)); ExpressionBuilder expressionBuilder = new ExpressionBuilder(this.getModeller(), this.getEventBus(), this.pattern.getExpression(), this.readOnly); expressionBuilder.addOnModifiedCommand(new Command() { public void execute() { setModified(true); } }); panel.setWidget(r, 1, expressionBuilder); return panel; } /** * Pops up the fact selector. */ protected void showFactTypeSelector(final Widget w) { DataModelOracle completions = this.getModeller().getSuggestionCompletions(); final ListBox box = new ListBox(); String[] facts = completions.getFactTypes(); box.addItem(Constants.INSTANCE.Choose()); for (int i = 0; i < facts.length; i++) { box.addItem(facts[i]); } box.setSelectedIndex(0); final FormStylePopup popup = new FormStylePopup(); popup.setTitle(Constants.INSTANCE.NewFactPattern()); popup.addAttribute(Constants.INSTANCE.chooseFactType(), box); box.addChangeHandler(new ChangeHandler() { public void onChange(ChangeEvent event) { pattern.setFactPattern(new FactPattern(box.getItemText(box.getSelectedIndex()))); setModified(true); getModeller().refreshWidget(); popup.hide(); } }); popup.show(); } protected Widget addRemoveButton(Widget w, ClickHandler listener) { DirtyableHorizontalPane horiz = new DirtyableHorizontalPane(); final Image remove = GuidedRuleEditorImages508.INSTANCE.DeleteItemSmall(); remove.setAltText(Constants.INSTANCE.RemoveThisBlockOfData()); remove.setTitle(Constants.INSTANCE.RemoveThisBlockOfData()); remove.addClickHandler(listener); horiz.setWidth("100%"); w.setWidth("100%"); horiz.add(w); if (!this.readOnly) { horiz.add(remove); } return horiz; } public boolean isDirty() { return layout.hasDirty(); } protected void calculateReadOnly() { if (this.pattern.getFactPattern() != null) { this.isFactTypeKnown = this.getModeller().getSuggestionCompletions() .isFactTypeRecognized(this.pattern.getFactPattern().getFactType()); this.readOnly = !this.isFactTypeKnown; } } @Override public boolean isReadOnly() { return this.readOnly; } @Override public boolean isFactTypeKnown() { return this.isFactTypeKnown; } }