private int fetchMessages(MessageListPopup popup) {
List<Message> messages = messageCenter.getMessages();
popup.getMessageList().setRowCount(messages.size(), true);
popup.getMessageList().setRowData(0, messages);
return messages.size();
}
private void reflectMessageCount() {
int numMessages = messageCenter.getNewMessageCount();
messageButton.setHTML(MESSAGE_LABEL + ": " + numMessages);
}
public Widget asWidget() {
HorizontalPanel layout = new HorizontalPanel();
layout.getElement().setAttribute("title", "Notification Center");
layout.setStyleName("notification-center");
messageButton = new HTML(MESSAGE_LABEL + ": " + messageCenter.getNewMessageCount());
messageButton.addStyleName("notification-button");
ClickHandler clickHandler =
new ClickHandler() {
public void onClick(ClickEvent event) {
int numMessages = fetchMessages(messagePopup);
if (numMessages == 0) numMessages = 1;
int width = 250;
int height = numMessages * 35;
messagePopup.setPopupPosition(
messageButton.getAbsoluteLeft() - (width + 10 - messageButton.getOffsetWidth()),
messageButton.getAbsoluteTop() + 25);
messagePopup.show();
Scheduler.get()
.scheduleDeferred(
new Scheduler.ScheduledCommand() {
@Override
public void execute() {
messagePopup.focusOnFirstMessage();
}
});
messagePopup.setWidth(width + "px");
messagePopup.setHeight(height + "px");
}
};
messageButton.addClickHandler(clickHandler);
messageDisplay = new HorizontalPanel();
messageDisplay.getElement().setAttribute("role", "log");
messageDisplay.getElement().setAttribute("aria-live", "polite");
messageDisplay.getElement().setAttribute("aria-atomic", "true");
layout.add(messageDisplay);
layout.add(messageButton);
messageDisplay
.getElement()
.getParentElement()
.setAttribute("style", "width:100%;padding-right:5px");
messageDisplay.getElement().getParentElement().setAttribute("align", "right");
messageButton.getElement().getParentElement().setAttribute("style", "width:60px");
messageButton.getElement().getParentElement().setAttribute("align", "right");
// register listener
messageCenter.addMessageListener(this);
Console.getEventBus().addHandler(ReloadEvent.TYPE, this);
return layout;
}
