1 package autotest.common.ui; 2 3 import com.google.gwt.user.client.ui.Composite; 4 import com.google.gwt.user.client.ui.DisclosurePanel; 5 import com.google.gwt.user.client.ui.HorizontalPanel; 6 import com.google.gwt.user.client.ui.Image; 7 import com.google.gwt.user.client.ui.Label; 8 import com.google.gwt.user.client.ui.Panel; 9 import com.google.gwt.user.client.ui.PopupPanel; 10 import com.google.gwt.user.client.ui.RootPanel; 11 import com.google.gwt.user.client.ui.TextArea; 12 import com.google.gwt.user.client.ui.Widget; 13 14 /** 15 * A singleton class to manage popup notifications, including error messages and 16 * the "loading..." box. 17 */ 18 public class NotifyManager { 19 private static final String SPINNER_IMAGE = "spinner.gif"; 20 21 // singleton 22 public static final NotifyManager theInstance = new NotifyManager(); 23 24 static class NotifyBox { 25 private PopupPanel outerPanel; 26 private Panel innerPanel = new HorizontalPanel(); 27 private Label message = new Label(); 28 NotifyBox(boolean autoHide)29 public NotifyBox(boolean autoHide) { 30 outerPanel = new PopupPanel(autoHide); 31 outerPanel.setStyleName("notify"); 32 33 innerPanel.setStyleName("notify-inner"); 34 outerPanel.add(innerPanel); 35 } 36 addStyle(String style)37 public void addStyle(String style) { 38 innerPanel.addStyleName(style); 39 } 40 hide()41 public void hide() { 42 outerPanel.hide(); 43 } 44 show()45 public void show() { 46 outerPanel.show(); 47 outerPanel.getElement().getStyle().setProperty("position", "fixed"); 48 } 49 showMessage(String messageString)50 public void showMessage(String messageString) { 51 message.setText(messageString); 52 showWidget(message); 53 } 54 showWidget(Widget widget)55 public void showWidget(Widget widget) { 56 innerPanel.clear(); 57 innerPanel.add(widget); 58 show(); 59 } 60 } 61 62 static class ErrorLog extends Composite { 63 protected DisclosurePanel disclosurePanel = 64 new DisclosurePanel("Error log"); 65 protected TextArea errorTextArea = new TextArea(); 66 ErrorLog()67 public ErrorLog() { 68 errorTextArea.setCharacterWidth(120); 69 errorTextArea.setVisibleLines(30); 70 errorTextArea.setReadOnly(true); 71 disclosurePanel.add(errorTextArea); 72 initWidget(disclosurePanel); 73 } 74 logError(String error)75 public void logError(String error) { 76 String errorText = errorTextArea.getText(); 77 if (!errorText.equals("")) 78 errorText += "\n------------------------------\n"; 79 errorText += error; 80 errorTextArea.setText(errorText); 81 } 82 } 83 84 protected NotifyBox errorNotify = new NotifyBox(true); 85 protected NotifyBox messageNotify = new NotifyBox(true); 86 protected NotifyBox loadingNotify = new NotifyBox(false); 87 private HorizontalPanel loadingPanel = new HorizontalPanel(); 88 protected ErrorLog errorLog = new ErrorLog(); 89 private int loadingCount = 0; 90 NotifyManager()91 private NotifyManager() { 92 errorNotify.addStyle("error"); 93 } 94 95 /** 96 * Should be called a page loading time. 97 */ initialize()98 public void initialize() { 99 errorNotify.hide(); 100 messageNotify.hide(); 101 102 loadingPanel.setVerticalAlignment(HorizontalPanel.ALIGN_MIDDLE); 103 loadingPanel.setSpacing(3); 104 loadingPanel.add(new Image(SPINNER_IMAGE)); 105 loadingPanel.add(new Label("Loading...")); 106 loadingPanel.add(new Image(SPINNER_IMAGE)); 107 108 RootPanel.get("error_log").add(errorLog); 109 errorLog.setVisible(false); 110 } 111 getInstance()112 public static NotifyManager getInstance() { 113 return theInstance; 114 } 115 116 /** 117 * Show an error message. 118 */ showError(String error, String logMessage)119 public void showError(String error, String logMessage) { 120 String errorLogText = error; 121 if (logMessage != null) 122 errorLogText += "\n" + logMessage; 123 errorNotify.showMessage(error); 124 log(errorLogText); 125 } 126 showError(String error)127 public void showError(String error) { 128 showError(error, null); 129 } 130 131 /** 132 * Log a message to the error log without showing any popup. 133 */ log(String message)134 public void log(String message) { 135 errorLog.logError(message); 136 errorLog.setVisible(true); 137 } 138 139 /** 140 * Show a notification message. 141 */ showMessage(String message)142 public void showMessage(String message) { 143 messageNotify.showMessage(message); 144 } 145 146 /** 147 * Set whether the loading box is displayed or not. 148 */ setLoading(boolean visible)149 public void setLoading(boolean visible) { 150 if (visible) { 151 if (loadingCount == 0) { 152 loadingNotify.showWidget(loadingPanel); 153 } 154 loadingCount++; 155 } else { 156 loadingCount--; 157 if (loadingCount == 0) { 158 loadingNotify.hide(); 159 } 160 } 161 } 162 } 163