AbstractProxyPopupDropDownTextBox.java

/*
 * Copyright 2012 Red Hat, Inc. and/or its affiliates.
 *
 * 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.kie.workbench.common.widgets.decoratedgrid.client.widget.cells;

import com.google.gwt.cell.client.Cell;
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.text.shared.SafeHtmlRenderer;
import com.google.gwt.user.client.ui.Widget;
import org.drools.workbench.models.datamodel.oracle.DropDownData;
import org.gwtbootstrap3.client.ui.TextBox;

/**
 * A Popup drop-down Editor ;-)
 */
public abstract class AbstractProxyPopupDropDownTextBox<C> implements ProxyPopupDropDown<C> {

    private final TextBox textBox;

    public AbstractProxyPopupDropDownTextBox( final TextBox textBox,
                                              final AbstractProxyPopupDropDownEditCell proxy ) {

        this.textBox = textBox;

        // Tabbing out of the ListBox 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 ) {
                    proxy.commit();
                }
            }

        } );
    }

    @Override
    public void render( final Cell.Context context,
                        final C value,
                        final SafeHtmlBuilder sb,
                        final SafeHtmlRenderer<String> renderer ) {
        //Render value
        if ( value != null ) {
            sb.append( renderer.render( ( value == null ? "" : convertToString( value ) ) ) );
        }
    }

    @Override
    public void setValue( final C value ) {
        textBox.setValue( ( value == null ? "" : convertToString( value ) ) );
    }

    @Override
    public void setDropDownData( final DropDownData dd ) {
        throw new UnsupportedOperationException( "Only single values are supported" );
    }

    // Commit the change
    @Override
    public C getValue() {
        final String value = textBox.getValue();
        if ( value.length() == 0 ) {
            return null;
        }

        return convertFromString( value );
    }

    // Start editing the cell
    @Override
    public void startEditing( final Cell.Context context,
                              final Element parent,
                              final C value ) {
        textBox.setValue( ( value == null ? "" : convertToString( value ) ) );
    }

    @Override
    public void setFocus( final boolean focused ) {
        textBox.setFocus( focused );
    }

    @Override
    public Widget asWidget() {
        return textBox;
    }

}