Source Code Cross Referenced for ActionSetFieldWidget.java in  » Rule-Engine » drolls-Rule-Engine » org » drools » brms » client » modeldriven » ui » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Rule Engine » drolls Rule Engine » org.drools.brms.client.modeldriven.ui 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        package org.drools.brms.client.modeldriven.ui;
002:
003:        /*
004:         * Copyright 2005 JBoss Inc
005:         *
006:         * Licensed under the Apache License, Version 2.0 (the "License");
007:         * you may not use this file except in compliance with the License.
008:         * You may obtain a copy of the License at
009:         *
010:         *      http://www.apache.org/licenses/LICENSE-2.0
011:         *
012:         * Unless required by applicable law or agreed to in writing, software
013:         * distributed under the License is distributed on an "AS IS" BASIS,
014:         * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015:         * See the License for the specific language governing permissions and
016:         * limitations under the License.
017:         */
018:
019:        import org.drools.brms.client.common.DirtyableComposite;
020:        import org.drools.brms.client.common.DirtyableFlexTable;
021:        import org.drools.brms.client.common.FieldEditListener;
022:        import org.drools.brms.client.common.FormStylePopup;
023:        import org.drools.brms.client.common.ImageButton;
024:        import org.drools.brms.client.common.Lbl;
025:        import org.drools.brms.client.common.YesNoDialog;
026:        import org.drools.brms.client.modeldriven.HumanReadable;
027:        import org.drools.brms.client.modeldriven.SuggestionCompletionEngine;
028:        import org.drools.brms.client.modeldriven.brl.ActionFieldValue;
029:        import org.drools.brms.client.modeldriven.brl.ActionSetField;
030:        import org.drools.brms.client.modeldriven.brl.ActionUpdateField;
031:        import org.drools.brms.client.modeldriven.brl.FactPattern;
032:        import org.drools.brms.client.modeldriven.brl.RuleModel;
033:
034:        import com.google.gwt.user.client.Command;
035:        import com.google.gwt.user.client.ui.ChangeListener;
036:        import com.google.gwt.user.client.ui.ClickListener;
037:        import com.google.gwt.user.client.ui.Composite;
038:        import com.google.gwt.user.client.ui.FlexTable;
039:        import com.google.gwt.user.client.ui.HorizontalPanel;
040:        import com.google.gwt.user.client.ui.Image;
041:        import com.google.gwt.user.client.ui.KeyboardListener;
042:        import com.google.gwt.user.client.ui.Label;
043:        import com.google.gwt.user.client.ui.ListBox;
044:        import com.google.gwt.user.client.ui.SimplePanel;
045:        import com.google.gwt.user.client.ui.TextBox;
046:        import com.google.gwt.user.client.ui.Widget;
047:
048:        /**
049:         * This widget is for setting fields on a bound fact or global variable.
050:         *
051:         * @author Michael Neale
052:         */
053:        public class ActionSetFieldWidget extends DirtyableComposite {
054:
055:            final private ActionSetField model;
056:            final private SuggestionCompletionEngine completions;
057:            final private DirtyableFlexTable layout;
058:            private boolean isBoundFact = false;
059:
060:            final private String[] fieldCompletions;
061:            final private RuleModeller modeller;
062:            final private String variableClass;
063:
064:            public ActionSetFieldWidget(RuleModeller mod, ActionSetField set,
065:                    SuggestionCompletionEngine com) {
066:                this .model = set;
067:                this .completions = com;
068:                this .layout = new DirtyableFlexTable();
069:                this .modeller = mod;
070:
071:                layout.setStyleName("model-builderInner-Background");
072:                if (completions.isGlobalVariable(set.variable)) {
073:                    this .fieldCompletions = completions
074:                            .getFieldCompletionsForGlobalVariable(set.variable);
075:                    this .variableClass = (String) completions.globalTypes
076:                            .get(set.variable);
077:                } else {
078:                    FactPattern pattern = mod.getModel().getBoundFact(
079:                            set.variable);
080:                    this .fieldCompletions = completions
081:                            .getFieldCompletions(pattern.factType);
082:                    this .variableClass = pattern.factType;
083:                    this .isBoundFact = true;
084:                }
085:
086:                doLayout();
087:
088:                initWidget(this .layout);
089:            }
090:
091:            private void doLayout() {
092:                layout.clear();
093:                layout.setWidget(0, 0, getSetterLabel());
094:
095:                DirtyableFlexTable inner = new DirtyableFlexTable();
096:
097:                for (int i = 0; i < model.fieldValues.length; i++) {
098:                    ActionFieldValue val = model.fieldValues[i];
099:
100:                    inner.setWidget(i, 0, fieldSelector(val));
101:                    inner.setWidget(i, 1, valueEditor(val));
102:                    final int idx = i;
103:                    Image remove = new ImageButton(
104:                            "images/delete_item_small.gif");
105:                    remove.addClickListener(new ClickListener() {
106:                        public void onClick(Widget w) {
107:                            YesNoDialog diag = new YesNoDialog(
108:                                    "Remove this item?", new Command() {
109:                                        public void execute() {
110:                                            model.removeField(idx);
111:                                            modeller.refreshWidget();
112:                                        }
113:                                    });
114:                            diag.setPopupPosition(w.getAbsoluteLeft(), w
115:                                    .getAbsoluteTop());
116:                            diag.show();
117:                        }
118:                    });
119:                    inner.setWidget(i, 2, remove);
120:                }
121:
122:                layout.setWidget(0, 1, inner);
123:
124:            }
125:
126:            private Widget getSetterLabel() {
127:
128:                HorizontalPanel horiz = new HorizontalPanel();
129:
130:                Image edit = new ImageButton("images/add_field_to_fact.gif");
131:                edit
132:                        .setTitle("Add another field to this so you can set its value.");
133:                edit.addClickListener(new ClickListener() {
134:                    public void onClick(Widget w) {
135:                        showAddFieldPopup(w);
136:                    }
137:                });
138:                String modifyType = "set";
139:                if (this .model instanceof  ActionUpdateField) {
140:                    modifyType = "modify";
141:                }
142:                horiz
143:                        .add(new Lbl(HumanReadable
144:                                .getActionDisplayName(modifyType)
145:                                + " [" + model.variable + "]",
146:                                "modeller-action-Label"));
147:                horiz.add(edit);
148:
149:                return horiz;
150:            }
151:
152:            protected void showAddFieldPopup(Widget w) {
153:                final FormStylePopup popup = new FormStylePopup(
154:                        "images/newex_wiz.gif", "Add a field");
155:                popup.setStyleName("ks-popups-Popup");
156:                final ListBox box = new ListBox();
157:                box.addItem("...");
158:
159:                for (int i = 0; i < fieldCompletions.length; i++) {
160:                    box.addItem(fieldCompletions[i]);
161:                }
162:
163:                box.setSelectedIndex(0);
164:
165:                popup.addAttribute("Add field", box);
166:                box.addChangeListener(new ChangeListener() {
167:                    public void onChange(Widget w) {
168:                        String fieldName = box.getItemText(box
169:                                .getSelectedIndex());
170:
171:                        String fieldType = completions.getFieldType(
172:                                variableClass, fieldName);
173:                        model.addFieldValue(new ActionFieldValue(fieldName, "",
174:                                fieldType));
175:                        modeller.refreshWidget();
176:                        popup.hide();
177:                    }
178:                });
179:
180:                popup.setPopupPosition(w.getAbsoluteLeft(), w.getAbsoluteTop());
181:                popup.show();
182:
183:            }
184:
185:            private Widget valueEditor(final ActionFieldValue val) {
186:
187:                String enumKey = this .variableClass + "." + val.field;
188:                if (this .completions.dataEnumLists.containsKey(enumKey)) {
189:                    return ConstraintValueEditor.enumDropDown(val.value,
190:                            new ConstraintValueEditor.ValueChanged() {
191:                                public void valueChanged(String newValue) {
192:                                    val.value = newValue;
193:                                }
194:                            }, (String[]) this .completions.dataEnumLists
195:                                    .get(enumKey));
196:                } else {
197:
198:                    SimplePanel panel = new SimplePanel();
199:                    final TextBox box = new TextBox();
200:                    box.setText(val.value);
201:                    if (val.value.length() != 0) {
202:                        box.setVisibleLength(val.value.length());
203:                    }
204:
205:                    if (val.type
206:                            .equals(SuggestionCompletionEngine.TYPE_NUMERIC)) {
207:                        box.addKeyboardListener(getNumericFilter(box));
208:                    }
209:
210:                    box.addChangeListener(new ChangeListener() {
211:                        public void onChange(Widget w) {
212:                            val.value = box.getText();
213:                        }
214:                    });
215:
216:                    box.addKeyboardListener(new FieldEditListener(
217:                            new Command() {
218:                                public void execute() {
219:                                    box
220:                                            .setVisibleLength(box.getText()
221:                                                    .length());
222:                                }
223:                            }));
224:                    panel.add(box);
225:                    return panel;
226:                }
227:            }
228:
229:            /**
230:             * This will return a keyboard listener for field setters, which
231:             * will obey numeric conventions - it will also allow formulas
232:             * (a formula is when the first value is a "=" which means
233:             * it is meant to be taken as the user typed)
234:             */
235:            public static KeyboardListener getNumericFilter(final TextBox box) {
236:                return new KeyboardListener() {
237:
238:                    public void onKeyDown(Widget arg0, char arg1, int arg2) {
239:
240:                    }
241:
242:                    public void onKeyPress(Widget w, char c, int i) {
243:                        if (Character.isLetter(c) && c != '='
244:                                && !(box.getText().startsWith("="))) {
245:                            ((TextBox) w).cancelKey();
246:                        }
247:                    }
248:
249:                    public void onKeyUp(Widget arg0, char arg1, int arg2) {
250:                    }
251:
252:                };
253:            }
254:
255:            private Widget fieldSelector(final ActionFieldValue val) {
256:                return new Label(val.field);
257:            }
258:
259:            /**
260:             * This returns true if the values being set are on a fact.
261:             */
262:            public boolean isBoundFact() {
263:                return isBoundFact;
264:            }
265:
266:            public boolean isDirty() {
267:                return layout.hasDirty();
268:            }
269:
270:        }
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