org.drools.guvnor.client.decisiontable.cells.PopupNumericBigDecimalEditCell.java Source code

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Here is the source code for org.drools.guvnor.client.decisiontable.cells.PopupNumericBigDecimalEditCell.java

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/*
 * Copyright 2011 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.drools.guvnor.client.decisiontable.cells;

import java.math.BigDecimal;

import org.drools.guvnor.client.common.NumericBigDecimalTextBox;

import com.google.gwt.core.client.Scheduler;
import com.google.gwt.core.client.Scheduler.ScheduledCommand;
import com.google.gwt.dom.client.Element;
import com.google.gwt.event.dom.client.KeyCodes;
import com.google.gwt.event.dom.client.KeyDownEvent;
import com.google.gwt.event.dom.client.KeyDownHandler;
import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
import com.google.gwt.user.client.ui.PopupPanel.PositionCallback;
import com.google.gwt.user.client.ui.TextBox;

/**
 * A Popup Text Editor for BigDecimal values.
 */
public class PopupNumericBigDecimalEditCell extends AbstractPopupEditCell<BigDecimal, BigDecimal> {

    private final TextBox textBox = new NumericBigDecimalTextBox();

    public PopupNumericBigDecimalEditCell(boolean isReadOnly) {
        super(isReadOnly);

        // Tabbing out of the TextBox commits changes
        textBox.addKeyDownHandler(new KeyDownHandler() {

            public void onKeyDown(KeyDownEvent event) {
                boolean keyTab = event.getNativeKeyCode() == KeyCodes.KEY_TAB;
                boolean keyEnter = event.getNativeKeyCode() == KeyCodes.KEY_ENTER;
                if (keyEnter || keyTab) {
                    commit();
                }
            }

        });

        vPanel.add(textBox);
    }

    @Override
    public void render(Context context, BigDecimal value, SafeHtmlBuilder sb) {
        if (value != null) {
            sb.append(renderer.render(value.toPlainString()));
        }
    }

    // Commit the change
    @Override
    protected void commit() {

        // Update value
        String text = textBox.getValue();
        BigDecimal number = null;
        if (text.length() > 0) {
            try {
                number = new BigDecimal(text);
            } catch (NumberFormatException e) {
                number = new BigDecimal(0);
            }
        }
        setValue(lastContext, lastParent, number);
        if (valueUpdater != null) {
            valueUpdater.update(number);
        }
        panel.hide();
    }

    // Start editing the cell
    @Override
    protected void startEditing(final Context context, final Element parent, final BigDecimal value) {

        textBox.setValue((value == null ? "" : value.toPlainString()));

        panel.setPopupPositionAndShow(new PositionCallback() {
            public void setPosition(int offsetWidth, int offsetHeight) {
                panel.setPopupPosition(parent.getAbsoluteLeft() + offsetX, parent.getAbsoluteTop() + offsetY);

                // Focus the first enabled control
                Scheduler.get().scheduleDeferred(new ScheduledCommand() {

                    public void execute() {
                        String text = textBox.getValue();
                        textBox.setFocus(true);
                        textBox.setCursorPos(text.length());
                        textBox.setSelectionRange(0, text.length());
                    }

                });
            }
        });

    }

}