Java tutorial
/* * Copyright 2016 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.drools.workbench.screens.enums.client.editor; import com.google.gwt.cell.client.EditTextCell; import com.google.gwt.cell.client.ValueUpdater; import com.google.gwt.core.client.GWT; import com.google.gwt.dom.client.Element; import com.google.gwt.dom.client.NativeEvent; import com.google.gwt.safehtml.client.SafeHtmlTemplates; import com.google.gwt.safehtml.shared.SafeHtml; import com.google.gwt.safehtml.shared.SafeHtmlBuilder; import org.drools.workbench.screens.enums.client.resources.EnumEditorResources; import org.drools.workbench.screens.enums.client.resources.i18n.EnumEditorConstants; public class EnumEditTextCell extends EditTextCell { interface Template extends SafeHtmlTemplates { @Template("<div class=\"{0}\" title=\"{1}\">{2}</div>") SafeHtml cellContent(final String css, final String tooltip, final String value); } private static Template template; public EnumEditTextCell() { if (template == null) { template = GWT.create(Template.class); } } @Override public void onBrowserEvent(final Context context, final Element parent, final String value, final NativeEvent event, final ValueUpdater<String> valueUpdater) { final EnumRow enumRow = (EnumRow) context.getKey(); if (!enumRow.disabled()) { doOnBrowserEvent(context, parent, value, event, valueUpdater); } } //Package protected to verify behaviour in Unit Tests void doOnBrowserEvent(final Context context, final Element parent, final String value, final NativeEvent event, final ValueUpdater<String> valueUpdater) { super.onBrowserEvent(context, parent, value, event, valueUpdater); } @Override public void render(final Context context, final String value, final SafeHtmlBuilder sb) { final EnumRow enumRow = (EnumRow) context.getKey(); if (!enumRow.disabled()) { doRender(context, value, sb); } else { if (!(value == null || value.isEmpty())) { sb.append(template.cellContent(EnumEditorResources.INSTANCE.css().disabled(), EnumEditorConstants.INSTANCE.invalidDefinitionDisabled(), value)); } else { sb.append(template.cellContent(EnumEditorResources.INSTANCE.css().disabled(), EnumEditorConstants.INSTANCE.invalidDefinitionDisabled(), "\u00A0")); } } } //Package protected to verify behaviour in Unit Tests void doRender(final Context context, final String value, final SafeHtmlBuilder sb) { super.render(context, value, sb); } }