org.drools.guvnor.client.modeldriven.ui.ActionInsertFactWidget.java Source code

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Here is the source code for org.drools.guvnor.client.modeldriven.ui.ActionInsertFactWidget.java

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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.ActionInsertFact;
import org.drools.guvnor.client.modeldriven.brl.ActionInsertLogicalFact;

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 is used when asserting a new fact into working memory.
 *
 * @author Michael Neale
 *
 */
public class ActionInsertFactWidget extends DirtyableComposite {

    private final DirtyableFlexTable layout;
    private final ActionInsertFact model;
    private final SuggestionCompletionEngine completions;
    private final String[] fieldCompletions;
    private final RuleModeller modeller;
    private final String factType;

    public ActionInsertFactWidget(RuleModeller mod, ActionInsertFact set, SuggestionCompletionEngine com) {
        this.model = set;
        this.completions = com;
        this.layout = new DirtyableFlexTable();
        this.modeller = mod;
        this.factType = set.factType;
        this.fieldCompletions = this.completions.getFieldCompletions(set.factType);

        layout.setStyleName("model-builderInner-Background");

        doLayout();

        initWidget(this.layout);
    }

    private void doLayout() {
        layout.clear();
        layout.setWidget(0, 0, getAssertLabel());

        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 valueEditor(final ActionFieldValue val) {
        DropDownData enums = this.completions.getEnums(this.factType, this.model.fieldValues, val.field);
        return new ActionValueEditor(val, enums);
    }

    private Widget fieldSelector(final ActionFieldValue val) {
        return new SmallLabel(val.field);
    }

    private Widget getAssertLabel() {
        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 assertType = "assert";
        if (this.model instanceof ActionInsertLogicalFact) {
            assertType = "assertLogical";
        }
        horiz.add(new SmallLabel(
                HumanReadable.getActionDisplayName(assertType) + " <b>" + this.model.factType + "</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(model.factType, fieldName);
                model.addFieldValue(new ActionFieldValue(fieldName, "", fieldType));
                modeller.refreshWidget();
                popup.hide();
            }
        });

        popup.show();

    }

}