org.drools.brms.client.modeldriven.ui.RuleAttributeWidget.java Source code

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Here is the source code for org.drools.brms.client.modeldriven.ui.RuleAttributeWidget.java

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package org.drools.brms.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.brms.client.common.DirtyableComposite;
import org.drools.brms.client.common.DirtyableHorizontalPane;
import org.drools.brms.client.common.FormStyleLayout;
import org.drools.brms.client.common.YesNoDialog;
import org.drools.brms.client.modeldriven.brl.RuleAttribute;
import org.drools.brms.client.modeldriven.brl.RuleModel;

import com.google.gwt.user.client.Command;
import com.google.gwt.user.client.ui.ChangeListener;
import com.google.gwt.user.client.ui.CheckBox;
import com.google.gwt.user.client.ui.ClickListener;
import com.google.gwt.user.client.ui.Image;
import com.google.gwt.user.client.ui.KeyboardListener;
import com.google.gwt.user.client.ui.ListBox;
import com.google.gwt.user.client.ui.TextBox;
import com.google.gwt.user.client.ui.Widget;

/**
 * Displays a list of rule options (attributes).
 * 
 * @author Michael Neale
 */
public class RuleAttributeWidget extends DirtyableComposite {

    private FormStyleLayout layout;
    private RuleModel model;
    private RuleModeller parent;

    public RuleAttributeWidget(RuleModeller parent, RuleModel model) {
        this.parent = parent;
        this.model = model;
        layout = new FormStyleLayout();
        RuleAttribute[] attrs = model.attributes;
        for (int i = 0; i < attrs.length; i++) {
            RuleAttribute at = attrs[i];
            layout.addAttribute(at.attributeName, getEditorWidget(at, i));
        }

        initWidget(layout);
    }

    /**
     * Return a listbox of choices for rule attributes.
     * @return
     */
    public static ListBox getAttributeList() {
        ListBox list = new ListBox();
        list.addItem("Choose...");

        list.addItem("salience");
        list.addItem("enabled");
        list.addItem("date-effective");
        list.addItem("date-expires");
        list.addItem("no-loop");
        list.addItem("agenda-group");
        list.addItem("activation-group");
        list.addItem("duration");
        list.addItem("auto-focus");
        list.addItem("lock-on-active");
        list.addItem("ruleflow-group");
        list.addItem("dialect");

        return list;
    }

    private Widget getEditorWidget(final RuleAttribute at, final int idx) {
        if (at.attributeName.equals("no-loop")) {
            return getRemoveIcon(idx);
        }

        Widget editor = null;

        if (at.attributeName.equals("enabled") || at.attributeName.equals("auto-focus")
                || at.attributeName.equals("lock-on-active")) {
            editor = checkBoxEditor(at);
        } else {
            editor = textBoxEditor(at);
        }

        DirtyableHorizontalPane horiz = new DirtyableHorizontalPane();
        horiz.add(editor);
        horiz.add(getRemoveIcon(idx));

        return horiz;

    }

    private Widget checkBoxEditor(final RuleAttribute at) {
        final CheckBox box = new CheckBox();
        if (at.value == null) {
            box.setChecked(true);
            at.value = "true";
        } else {
            box.setChecked((at.value.equals("true") ? true : false));
        }

        box.addClickListener(new ClickListener() {
            public void onClick(Widget w) {
                at.value = (box.isChecked()) ? "true" : "false";
            }
        });
        return box;
    }

    private TextBox textBoxEditor(final RuleAttribute at) {
        final TextBox box = new TextBox();
        box.setVisibleLength((at.value.length() < 3) ? 3 : at.value.length());
        box.setText(at.value);
        box.addChangeListener(new ChangeListener() {
            public void onChange(Widget w) {
                at.value = box.getText();
                makeDirty();
            }
        });

        if (at.attributeName.equals("date-effective") || at.attributeName.equals("date-expires")) {
            if (at.value == null || "".equals(at.value))
                box.setText("dd-MMM-yyyy");

            box.setVisibleLength(10);
        }

        box.addKeyboardListener(new KeyboardListener() {

            public void onKeyDown(Widget arg0, char arg1, int arg2) {

            }

            public void onKeyPress(Widget arg0, char arg1, int arg2) {

            }

            public void onKeyUp(Widget arg0, char arg1, int arg2) {
                box.setVisibleLength(box.getText().length());
            }

        });
        return box;
    }

    private Image getRemoveIcon(final int idx) {
        Image remove = new Image("images/delete_item_small.gif");
        remove.addClickListener(new ClickListener() {
            public void onClick(Widget w) {
                YesNoDialog diag = new YesNoDialog("Remove this rule option?", new Command() {
                    public void execute() {
                        model.removeAttribute(idx);
                        parent.refreshWidget();
                    }
                });
                diag.setPopupPosition(w.getAbsoluteLeft(), w.getAbsoluteTop());
                diag.show();
            }
        });
        return remove;
    }

    public boolean isDirty() {
        return layout.isDirty();
    }

}