Java tutorial
/******************************************************************************* * Copyright (c) 2010-2014 SAP AG and others. * 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: * SAP AG - initial API and implementation *******************************************************************************/ package org.eclipse.skalli.view.component; import org.apache.commons.lang.StringEscapeUtils; import org.eclipse.skalli.commons.HtmlUtils; import com.vaadin.terminal.ThemeResource; import com.vaadin.ui.Alignment; import com.vaadin.ui.Button; import com.vaadin.ui.Button.ClickEvent; import com.vaadin.ui.Component; import com.vaadin.ui.ComponentContainer; import com.vaadin.ui.CssLayout; import com.vaadin.ui.CustomComponent; import com.vaadin.ui.Embedded; import com.vaadin.ui.HorizontalLayout; import com.vaadin.ui.Label; import com.vaadin.ui.NativeButton; import com.vaadin.ui.Window.Notification; public class Tray extends CustomComponent { private static final long serialVersionUID = -5069545260062750691L; private Embedded trayIcon; private ThemeResource icon; private boolean isVisible; private boolean isEnabled; private boolean isRequired; private final Component component; private Button activator; private Button opener; private final ThemeResource ERROR_ICON = new ThemeResource("icons/tray/error.png"); private static final String STYLE_TRAY = "tray"; private static final String STYLE_TRAY_HEADER = "header"; private static final String STYLE_TRAY_HEADER_ICON = "header-icon"; private static final String STYLE_TRAY_HEADER_LABEL = "header-label"; private static final String STYLE_TRAY_DESCRIPTION = "description"; private static final String STYLE_TRAY_OPEN = "open"; private static final String STYLE_TRAY_CLOSED = "closed"; private static final String STYLE_TRAY_ENABLED = "enabled"; private static final String STYLE_TRAY_DISABLED = "disabled"; public Tray(Component component, String caption, String description, ThemeResource icon, boolean isVisible, boolean isEnabled, boolean isRequired) { this.component = component; ComponentContainer content = createContent(caption, description, icon, isRequired); content.addComponent(component); setContentState(isVisible, isEnabled); } private ComponentContainer createContent(String caption, String description, ThemeResource icon, boolean isRequired) { CssLayout layout = new CssLayout(); layout.setStyleName(STYLE_TRAY); layout.setMargin(true); HorizontalLayout header = new HorizontalLayout(); header.setSpacing(true); header.setStyleName(STYLE_TRAY_HEADER); header.setWidth("100%"); this.icon = icon; trayIcon = new Embedded(null, icon); trayIcon.setStyleName(STYLE_TRAY_HEADER_ICON); header.addComponent(trayIcon); header.setComponentAlignment(trayIcon, Alignment.MIDDLE_LEFT); header.setExpandRatio(trayIcon, 0); Label captionLabel = new Label(StringEscapeUtils.escapeHtml(caption), Label.CONTENT_XHTML); captionLabel.setStyleName(STYLE_TRAY_HEADER_LABEL); header.addComponent(captionLabel); header.setExpandRatio(captionLabel, 1); header.setComponentAlignment(captionLabel, Alignment.MIDDLE_LEFT); this.isRequired = isRequired; if (!isRequired) { activator = new NativeButton("", new ToggleEnabledListener()); header.addComponent(activator); header.setExpandRatio(activator, 0); header.setComponentAlignment(activator, Alignment.MIDDLE_RIGHT); } opener = new NativeButton("", new ToggleVisibleListener()); header.addComponent(opener); header.setExpandRatio(opener, 0); header.setComponentAlignment(opener, Alignment.MIDDLE_RIGHT); layout.addComponent(header); CssLayout content = new CssLayout(); Label descriptionLabel = new Label(HtmlUtils.clean(description), Label.CONTENT_XHTML); descriptionLabel.setStyleName(STYLE_TRAY_DESCRIPTION); content.addComponent(descriptionLabel); layout.addComponent(content); setCompositionRoot(layout); return content; } public boolean isContentVisible() { return isVisible; } public void setContentVisible(boolean isContentVisible) { setContentState(isContentVisible, isEnabled); requestRepaint(); } public boolean isContentEnabled() { return isEnabled; } public void setContentEnabled(boolean isContentEnabled) { setContentState(isContentEnabled, isContentEnabled); requestRepaint(); } public void markAsInvalid(boolean isInvalid) { if (isInvalid) { trayIcon.setSource(ERROR_ICON); } else { trayIcon.setSource(icon); } } protected void setContentState(boolean isVisible, boolean isEnabled) { this.isVisible = isVisible; this.isEnabled = isRequired ? true : isEnabled; if (component != null) { component.setEnabled(isEnabled); component.setVisible(isVisible); } opener.setDescription(isVisible ? "Hide details" : "Show details"); opener.setStyleName(isVisible ? STYLE_TRAY_OPEN : STYLE_TRAY_CLOSED); if (!isRequired) { activator.setDescription(isEnabled ? "Disable this project nature" : "Enable this project nature"); activator.setStyleName(isEnabled ? STYLE_TRAY_ENABLED : STYLE_TRAY_DISABLED); } } private class ToggleVisibleListener implements Button.ClickListener { private static final long serialVersionUID = 6624509900591216536L; @Override public void buttonClick(ClickEvent event) { setContentVisible(!isVisible); } } private class ToggleEnabledListener implements Button.ClickListener { private static final long serialVersionUID = 539162056096468214L; @Override public void buttonClick(ClickEvent event) { boolean wasEnabled = isEnabled; setContentEnabled(!isEnabled); if (wasEnabled) { getWindow().showNotification("Potential Data Loss", "Removing a project nature removes also the maintained data!", Notification.TYPE_WARNING_MESSAGE); } } } }