Java tutorial
/******************************************************************************* * Copyright (c) 2012-2017 Codenvy, S.A. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * Codenvy, S.A. - initial API and implementation *******************************************************************************/ package org.eclipse.che.ide.command.toolbar.processes; import elemental.dom.Element; import com.google.gwt.core.client.Duration; import com.google.gwt.core.client.GWT; import com.google.gwt.dom.client.Document; import com.google.gwt.safehtml.shared.SafeHtml; import com.google.gwt.safehtml.shared.SafeHtmlBuilder; import com.google.gwt.user.client.Timer; import com.google.gwt.user.client.ui.ButtonBase; import com.google.gwt.user.client.ui.FlowPanel; import com.google.gwt.user.client.ui.InlineHTML; import com.google.gwt.user.client.ui.Label; import org.eclipse.che.ide.FontAwesome; import org.eclipse.che.ide.command.CommandResources; import org.eclipse.che.ide.command.toolbar.processes.ProcessItemRenderer.RerunProcessHandler; import org.eclipse.che.ide.command.toolbar.processes.ProcessItemRenderer.StopProcessHandler; import org.eclipse.che.ide.ui.Tooltip; import org.eclipse.che.ide.ui.dropdown.BaseListItem; import static com.google.gwt.dom.client.Style.Float.RIGHT; import static org.eclipse.che.ide.ui.menu.PositionController.HorizontalAlign.MIDDLE; import static org.eclipse.che.ide.ui.menu.PositionController.VerticalAlign.BOTTOM; /** * Widget for representing a {@link Process}. * Has different states for representing stopped and running processes. */ class ProcessWidget extends FlowPanel { private static final CommandResources RESOURCES = GWT.create(CommandResources.class); private final Label pidLabel; private final Label durationLabel; private final ActionButton stopButton; private final ActionButton reRunButton; private final Timer updateDurationTimer; /** Stores true if widget displays stopped process and false for running process. */ private boolean stopped; ProcessWidget(BaseListItem<Process> item, StopProcessHandler stopProcessHandler, RerunProcessHandler rerunProcessHandler) { super(); final Process process = item.getValue(); stopped = !process.isAlive(); durationLabel = new Label(); durationLabel.addStyleName(RESOURCES.commandToolbarCss().processWidgetText()); durationLabel.addStyleName(RESOURCES.commandToolbarCss().processWidgetPidLabel()); durationLabel.ensureDebugId("dropdown-processes-label-duration"); updateDurationTimer = new UpdateDurationTimer(); if (!stopped) { updateDurationTimer.scheduleRepeating(1000); } pidLabel = new Label('#' + Integer.toString(process.getPid())); pidLabel.addStyleName(RESOURCES.commandToolbarCss().processWidgetText()); pidLabel.addStyleName(RESOURCES.commandToolbarCss().processWidgetPidLabel()); pidLabel.ensureDebugId("dropdown-processes-label-pid"); Tooltip.create((Element) pidLabel.getElement(), BOTTOM, MIDDLE, "PID"); add(createMachineNameLabel(process)); add(createCommandNameLabel(process)); add(stopButton = createStopButton(process, stopProcessHandler)); add(reRunButton = createRerunButton(process, rerunProcessHandler)); add(durationLabel); add(pidLabel); checkStopped(); } private Label createMachineNameLabel(Process process) { final Label label = new InlineHTML(process.getMachine().getConfig().getName() + ": "); label.addStyleName(RESOURCES.commandToolbarCss().processWidgetText()); label.addStyleName(RESOURCES.commandToolbarCss().processWidgetMachineNameLabel()); label.ensureDebugId("dropdown-processes-machine-name"); Tooltip.create((Element) label.getElement(), BOTTOM, MIDDLE, process.getCommandLine().split("\\n")); return label; } private Label createCommandNameLabel(Process process) { final Label label = new InlineHTML(process.getName()); label.addStyleName(RESOURCES.commandToolbarCss().processWidgetText()); label.addStyleName(RESOURCES.commandToolbarCss().processWidgetCommandNameLabel()); label.ensureDebugId("dropdown-processes-command-name"); Tooltip.create((Element) label.getElement(), BOTTOM, MIDDLE, process.getCommandLine().split("\\n")); return label; } private ActionButton createStopButton(Process process, StopProcessHandler handler) { final SafeHtmlBuilder safeHtmlBuilder = new SafeHtmlBuilder(); safeHtmlBuilder.appendHtmlConstant(FontAwesome.STOP); final ActionButton button = new ActionButton(safeHtmlBuilder.toSafeHtml()); button.addClickHandler(event -> handler.onStopProcess(process)); button.ensureDebugId("dropdown-processes-stop"); Tooltip.create((Element) button.getElement(), BOTTOM, MIDDLE, "Stop"); return button; } private ActionButton createRerunButton(Process process, RerunProcessHandler handler) { final SafeHtmlBuilder safeHtmlBuilder = new SafeHtmlBuilder(); safeHtmlBuilder.appendHtmlConstant(FontAwesome.REPEAT); final ActionButton button = new ActionButton(safeHtmlBuilder.toSafeHtml()); button.addClickHandler(event -> handler.onRerunProcess(process)); button.ensureDebugId("dropdown-processes-rerun"); Tooltip.create((Element) button.getElement(), BOTTOM, MIDDLE, "Re-run"); return button; } /** Toggle widget's state for displaying running or stopped process. */ void toggleStopped() { stopped = !stopped; checkStopped(); updateDurationTimer.cancel(); } /** Check whether widget displays stopped or running process and changes widget's state if it's required. */ private void checkStopped() { pidLabel.setVisible(!stopped); reRunButton.setVisible(stopped); stopButton.setVisible(!stopped); } private static class ActionButton extends ButtonBase { ActionButton(SafeHtml content) { super(Document.get().createDivElement()); getElement().getStyle().setFloat(RIGHT); getElement().setInnerSafeHtml(content); asWidget().addStyleName(RESOURCES.commandToolbarCss().processWidgetActionButton()); } } /** Timer that updates duration label. */ private class UpdateDurationTimer extends Timer { final Duration duration = new Duration(); @Override public void run() { durationLabel.setText(getElapsedTime()); } /** Returns the time (mm:ss) that have elapsed since this timer was created. */ private String getElapsedTime() { final int elapsedSec = duration.elapsedMillis() / 1000; final int minutesPart = elapsedSec / 60; final int secondsPart = elapsedSec - minutesPart * 60; return (minutesPart < 10 ? "0" + minutesPart : minutesPart) + ":" + (secondsPart < 10 ? "0" + secondsPart : secondsPart); } @Override public void cancel() { super.cancel(); durationLabel.setVisible(false); } } }