Hello!
I have a problem with DockPanel. I would like to center DockPanel in
the screen. I have the next class to perform login/password screen.
But when I add the dockPanel to RootPanel, it doen not align CENTER.
Could someone help me???
Thanks in advance!
Regards!
public class ZB_app implements EntryPoint {
/**
* The message displayed to the user when the server cannot be
reached or
* returns an error.
*/
/*private static final String SERVER_ERROR = "An error occurred while
"
+ "attempting to contact the server. Please check your
network "
+ "connection and try again.";
*/
/**
* Create a remote service proxy to talk to the server-side Greeting
service.
*/
private final GreetingServiceAsync greetingService = GWT
.create(GreetingService.class);
/**
* This is the entry point method.
*/
public void onModuleLoad() {
RootPanel rootPanel = RootPanel.get();
rootPanel.setStyleName("dialogVPanel");
DockPanel dockPanel = new DockPanel();
final VerticalPanel vPanel = new VerticalPanel();
final HorizontalPanel hPanel1 = new HorizontalPanel();
final HorizontalPanel hPanel2 = new HorizontalPanel();
hPanel1.setBorderWidth(15);
hPanel2.setBorderWidth(15);
hPanel1.setSpacing(10);
hPanel2.setSpacing(10);
vPanel.setBorderWidth(15);
Label titleLabel = new Label("Write the login and password:");
titleLabel.setStyleName("gwt-Label");
vPanel.add(titleLabel);
final Label loginLabel = new Label("Login:");
loginLabel.setStyleName("gwt-Label");
loginLabel.setSize("65px", "19px");
hPanel1.add(loginLabel);
final TextBox loginField = new TextBox();
loginField.setText("");
loginField.setSize("145px", "19px");
hPanel1.add(loginField);
vPanel.add(hPanel1);
final Label passLabel = new Label("Password:");
passLabel.setSize("65px", "19px");
hPanel2.add(passLabel);
final PasswordTextBox passField = new PasswordTextBox();
passField.setSize("145px", "19px");
hPanel2.add(passField);
vPanel.add(hPanel2);
final Button loginButton = new Button("Login");
loginButton.setStyleName("sendButton");
loginButton.setSize("65px", "35px");
vPanel.add(loginButton);
final Label errorLabel = new Label();
errorLabel.setStyleName("serverResponseLabelError");
errorLabel.setSize("351px", "19px");
errorLabel.setVisible(false);
dockPanel.add(vPanel, DockPanel.CENTER);
dockPanel.setVerticalAlignment(HasAlignment.ALIGN_MIDDLE);
dockPanel.setHorizontalAlignment(HasAlignment.ALIGN_CENTER);
RootPanel.get("mainContainer").add(dockPanel);
//RootPanel.get("mainContainer").add(errorLabel, 450, 350);
loginField.selectAll();
passField.selectAll();
// Create a handler for the sendButton and nameField
class MyHandler implements ClickHandler, KeyUpHandler {
/**
* Fired when the user clicks on the sendButton.
*/
public void onClick(ClickEvent event) {
try {
sendNameToServer();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* Fired when the user types in the nameField.
*/
public void onKeyUp(KeyUpEvent event) {
if (event.getNativeKeyCode() ==
KeyCodes.KEY_ENTER) {
try {
sendNameToServer();
} catch (Exception e) {
e.printStackTrace();
}
}
}
/**
* Send the name from the nameField to the server and
wait for a
response.
* @throws Exception
*/
private void sendNameToServer() throws Exception {
errorLabel.setText("");
final String login = loginField.getText();
final String pass = passField.getValue();
// Then, we send the input to the server.
greetingService.greetServer(login, pass,
new AsyncCallback<Boolean>() {
public void
onFailure(Throwable caught) {
// Show the RPC
error message to the user
Window.alert(caught.getMessage());
errorLabel.setText(caught.getMessage());
errorLabel.setVisible(true);
}
public void
onSuccess(Boolean result) {
if(result){
//errorLabel.setText("Login correcto");
ZB_driver dev = new ZB_driver();
RootPanel.get("mainContainer").remove(vPanel);
RootPanel.get("mainContainer").remove(errorLabel);
try {
dev.addContainers();
} catch
(Exception e) {
e.printStackTrace();
}
}
else {
errorLabel.setText("Usuario erróneo");
errorLabel.setVisible(true);
Window.alert("Usuario erroneo");
}
}
});
//rootPanel.get().add(dev);
}
}
// Add a handler to send the name to the server
MyHandler handler = new MyHandler();
loginButton.addClickHandler(handler);
loginField.addKeyUpHandler(handler);
passField.addKeyUpHandler(handler);
}
}
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