Java tutorial
/* * Copyright 2013 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.overlord.rtgov.ui.client.local.pages.situations; import java.util.HashMap; import java.util.List; import java.util.Map; import org.overlord.rtgov.ui.client.model.CallTraceBean; import org.overlord.rtgov.ui.client.model.TraceNodeBean; import com.google.gwt.dom.client.Document; import com.google.gwt.dom.client.Element; import com.google.gwt.dom.client.EventTarget; import com.google.gwt.dom.client.LIElement; import com.google.gwt.dom.client.SpanElement; import com.google.gwt.dom.client.UListElement; import com.google.gwt.event.logical.shared.HasSelectionHandlers; import com.google.gwt.event.logical.shared.SelectionEvent; import com.google.gwt.event.logical.shared.SelectionHandler; import com.google.gwt.event.logical.shared.ValueChangeEvent; import com.google.gwt.event.logical.shared.ValueChangeHandler; import com.google.gwt.event.shared.HandlerRegistration; import com.google.gwt.user.client.Event; import com.google.gwt.user.client.ui.HasValue; import com.google.gwt.user.client.ui.Widget; /** * A widget used to display a call trace. * * @author eric.wittmann@redhat.com */ public class CallTraceWidget extends Widget implements HasValue<CallTraceBean>, HasSelectionHandlers<TraceNodeBean> { private Map<String, TraceNodeBean> nodeMap = new HashMap<String, TraceNodeBean>(); private int nodeIdCounter = 0; /** * Creates an empty flow panel. */ public CallTraceWidget() { setElement((com.google.gwt.user.client.Element) Document.get().createULElement().cast()); sinkEvents(Event.ONCLICK); } /** * @see com.google.gwt.user.client.ui.Widget#onBrowserEvent(com.google.gwt.user.client.Event) */ @Override public void onBrowserEvent(Event event) { super.onBrowserEvent(event); EventTarget target = event.getEventTarget(); Element elem = (Element) target.cast(); String nodeId = elem.getAttribute("data-nodeid"); //$NON-NLS-1$ if (nodeMap.containsKey(nodeId)) { TraceNodeBean bean = nodeMap.get(nodeId); SelectionEvent.fire(this, bean); } } /** * @see com.google.gwt.event.logical.shared.HasValueChangeHandlers#addValueChangeHandler(com.google.gwt.event.logical.shared.ValueChangeHandler) */ @Override public HandlerRegistration addValueChangeHandler(ValueChangeHandler<CallTraceBean> handler) { return addHandler(handler, ValueChangeEvent.getType()); } /** * @see com.google.gwt.user.client.ui.HasValue#getValue() */ @Override public CallTraceBean getValue() { return null; } /** * @see com.google.gwt.user.client.ui.HasValue#setValue(java.lang.Object) */ @Override public void setValue(CallTraceBean value) { setValue(value, false); } /** * @see com.google.gwt.user.client.ui.HasValue#setValue(java.lang.Object, boolean) */ @Override public void setValue(CallTraceBean value, boolean fireEvents) { if (value != null) { // Clear previous trace nodeMap.clear(); nodeIdCounter = 0; while (getElement().getFirstChild() != null) { getElement().removeChild(getElement().getFirstChild()); } List<TraceNodeBean> tasks = value.getTasks(); for (TraceNodeBean task : tasks) { LIElement li = createTreeNode(task); getElement().appendChild(li); } } } /** * Creates a single tree node from the given trace node. * @param node */ protected LIElement createTreeNode(TraceNodeBean node) { String nodeId = String.valueOf(nodeIdCounter++); nodeMap.put(nodeId, node); boolean isCall = "Call".equals(node.getType()); //$NON-NLS-1$ boolean hasChildren = !node.getTasks().isEmpty(); LIElement li = Document.get().createLIElement(); li.setClassName(hasChildren ? "parent_li" : "leaf_li"); //$NON-NLS-1$ //$NON-NLS-2$ if (hasChildren) li.setAttribute("role", "treeitem"); //$NON-NLS-1$ //$NON-NLS-2$ SpanElement span = Document.get().createSpanElement(); span.setAttribute("data-nodeid", nodeId); //$NON-NLS-1$ Element icon = Document.get().createElement("i"); //$NON-NLS-1$ span.appendChild(icon); span.appendChild(Document.get().createTextNode(" ")); //$NON-NLS-1$ if (isCall) { span.setClassName(node.getStatus()); icon.setClassName("icon-minus-sign"); //$NON-NLS-1$ span.appendChild(Document.get().createTextNode(node.getOperation())); span.appendChild(Document.get().createTextNode(":")); //$NON-NLS-1$ span.appendChild(Document.get().createTextNode(node.getComponent())); } else { span.appendChild(Document.get().createTextNode(node.getDescription())); span.setClassName("Info"); //$NON-NLS-1$ icon.setClassName("icon-info-sign"); //$NON-NLS-1$ } li.appendChild(span); if (node.getDuration() != -1) { li.appendChild(Document.get().createTextNode(" [")); //$NON-NLS-1$ li.appendChild(Document.get().createTextNode(String.valueOf(node.getDuration()))); li.appendChild(Document.get().createTextNode("ms]")); //$NON-NLS-1$ } if (node.getPercentage() != -1) { li.appendChild(Document.get().createTextNode(" (")); //$NON-NLS-1$ li.appendChild(Document.get().createTextNode(String.valueOf(node.getPercentage()))); li.appendChild(Document.get().createTextNode("%)")); //$NON-NLS-1$ } if (hasChildren) { UListElement ul = Document.get().createULElement(); ul.setAttribute("role", "group"); //$NON-NLS-1$ //$NON-NLS-2$ li.appendChild(ul); List<TraceNodeBean> tasks = node.getTasks(); for (TraceNodeBean task : tasks) { LIElement tn = createTreeNode(task); ul.appendChild(tn); } } return li; } /** * @see com.google.gwt.event.logical.shared.HasSelectionHandlers#addSelectionHandler(com.google.gwt.event.logical.shared.SelectionHandler) */ @Override public HandlerRegistration addSelectionHandler(SelectionHandler<TraceNodeBean> handler) { return addHandler(handler, SelectionEvent.getType()); } }