Java tutorial
package org.drools.guvnor.client.modeldriven.ui; /* * 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. */ import org.drools.guvnor.client.common.DirtyableComposite; import org.drools.guvnor.client.common.DirtyableFlexTable; import org.drools.guvnor.client.common.FormStylePopup; import org.drools.guvnor.client.common.ImageButton; import org.drools.guvnor.client.common.SmallLabel; import org.drools.guvnor.client.modeldriven.DropDownData; import org.drools.guvnor.client.modeldriven.HumanReadable; import org.drools.guvnor.client.modeldriven.SuggestionCompletionEngine; import org.drools.guvnor.client.modeldriven.brl.ActionFieldValue; import org.drools.guvnor.client.modeldriven.brl.ActionSetField; import org.drools.guvnor.client.modeldriven.brl.ActionUpdateField; import org.drools.guvnor.client.modeldriven.brl.FactPattern; import com.google.gwt.user.client.Window; import com.google.gwt.user.client.ui.ChangeListener; import com.google.gwt.user.client.ui.ClickListener; 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.Widget; /** * This widget is for setting fields on a bound fact or global variable. * * @author Michael Neale */ public class ActionSetFieldWidget extends DirtyableComposite { final private ActionSetField model; final private SuggestionCompletionEngine completions; final private DirtyableFlexTable layout; private boolean isBoundFact = false; final private String[] fieldCompletions; final private RuleModeller modeller; final private String variableClass; public ActionSetFieldWidget(RuleModeller mod, ActionSetField set, SuggestionCompletionEngine com) { this.model = set; this.completions = com; this.layout = new DirtyableFlexTable(); this.modeller = mod; layout.setStyleName("model-builderInner-Background"); if (completions.isGlobalVariable(set.variable)) { this.fieldCompletions = completions.getFieldCompletionsForGlobalVariable(set.variable); this.variableClass = (String) completions.globalTypes.get(set.variable); } else { FactPattern pattern = mod.getModel().getBoundFact(set.variable); this.fieldCompletions = completions.getFieldCompletions(pattern.factType); this.variableClass = pattern.factType; this.isBoundFact = true; } doLayout(); initWidget(this.layout); } private void doLayout() { layout.clear(); layout.setWidget(0, 0, getSetterLabel()); DirtyableFlexTable inner = new DirtyableFlexTable(); for (int i = 0; i < model.fieldValues.length; i++) { ActionFieldValue val = model.fieldValues[i]; inner.setWidget(i, 0, fieldSelector(val)); inner.setWidget(i, 1, valueEditor(val)); final int idx = i; Image remove = new ImageButton("images/delete_item_small.gif"); remove.addClickListener(new ClickListener() { public void onClick(Widget w) { if (Window.confirm("Remove this item?")) { model.removeField(idx); modeller.refreshWidget(); } } }); inner.setWidget(i, 2, remove); } layout.setWidget(0, 1, inner); } private Widget getSetterLabel() { HorizontalPanel horiz = new HorizontalPanel(); Image edit = new ImageButton("images/edit_tiny.gif"); edit.setTitle("Add another field to this so you can set its value."); edit.addClickListener(new ClickListener() { public void onClick(Widget w) { showAddFieldPopup(w); } }); String modifyType = "set"; if (this.model instanceof ActionUpdateField) { modifyType = "modify"; } horiz.add(new SmallLabel( HumanReadable.getActionDisplayName(modifyType) + " value of <b>[" + model.variable + "]</b>")); horiz.add(edit); return horiz; } protected void showAddFieldPopup(Widget w) { final FormStylePopup popup = new FormStylePopup("images/newex_wiz.gif", "Add a field"); final ListBox box = new ListBox(); box.addItem("..."); for (int i = 0; i < fieldCompletions.length; i++) { box.addItem(fieldCompletions[i]); } box.setSelectedIndex(0); popup.addAttribute("Add field", box); box.addChangeListener(new ChangeListener() { public void onChange(Widget w) { String fieldName = box.getItemText(box.getSelectedIndex()); String fieldType = completions.getFieldType(variableClass, fieldName); model.addFieldValue(new ActionFieldValue(fieldName, "", fieldType)); modeller.refreshWidget(); popup.hide(); } }); popup.show(); } private Widget valueEditor(final ActionFieldValue val) { String type = ""; if (this.completions.isGlobalVariable(this.model.variable)) { type = (String) this.completions.globalTypes.get(this.model.variable); } else { type = this.modeller.getModel().getBoundFact(this.model.variable).factType; } DropDownData enums = this.completions.getEnums(type, this.model.fieldValues, val.field); return new ActionValueEditor(val, enums); } private Widget fieldSelector(final ActionFieldValue val) { return new SmallLabel(val.field); } /** * This returns true if the values being set are on a fact. */ public boolean isBoundFact() { return isBoundFact; } public boolean isDirty() { return layout.hasDirty(); } }