Hi Alpine Bluster,
look at this code:
public void onModuleLoad() {
this.setLoginPanel();
loginButton = new Button("Login");
loginButton.addListener(new ButtonListenerAdapter() {
public void onClick(Button button, EventObject e) {
userAuthentication();
}
});
formPanel.addButton(loginButton);
formPanel.setBorder(false);
loginPanel.add(formPanel);
Element appPanelEl = loginPanel.getElement();
@SuppressWarnings("unused")
KeyMap map = new KeyMap(appPanelEl, new KeyMapConfig() {
{
setKey(EventObject.ENTER);
setKeyListener(new KeyListener() {
public void onKey(int key, EventObject e) {
loginButton.focus();
}
});
}
});
RootPanel.get("login_widget").add(loginPanel);
}
private void userAuthentication() {
if (this.userNameField.getValueAsString().equals(""))
Window.alert("username must not be empty.");
else {
loginService = GWT.create(LoginService.class);
String username = this.userNameField.getValueAsString();
String password = this.passwordField.getValueAsString();
this.loginService.login(username, password,
new AsyncCallback<LoginResponse>() {
public void onFailure(Throwable caught) {
Window.alert("server side failure: " + caught);
}
public void onSuccess(LoginResponse result) {
if (result.isLoginSuccess()){
Window.Location.replace("./../Main.html");
}
else Window.alert("username or password invalid.");
}
});
}
}
...
FOR LOGOUT
....
private Panel northPanel = new Panel();
....
Toolbar toolbar = new Toolbar();
ToolbarButton logoutButton = new ToolbarButton("Sign Out");
logoutButton.addListener( new ButtonListenerAdapter() {
public void onClick( Button button, EventObject e ) {
LoginServiceAsync service = GWT.create(LoginService.class);
service.logout(new AsyncCallback<Void>() {
@Override
public void onFailure(Throwable caught) {
caught.printStackTrace();
}
@Override
public void onSuccess(Void result) {
Window.Location.replace("./../Login.html");
}
});
}
});
tabPanel = new TabPanel();
toolbar.addFill();
toolbar.addText("welcome," + someUser..);
toolbar.addSeparator();
toolbar.addButton(logoutButton);
tabPanel.setWidth(NORMALIZE_SPACING);
tabPanel.setTopToolbar(toolbar);
northPanel.add(tabPanel);
On Wed, Jun 2, 2010 at 5:25 PM, Magnus <[email protected]> wrote:
> Hi,
>
> I cannot find a minimalistic example that shows how to realize a login/
> logout functionality.
> Could please someone point me to such an example?
>
> I also wonder where to put the different things. For example, the code
> that immediately reacts on the "login" button could be placed within
> the "client" folder of a GWT project, or it could be realized as a
> servlet.
>
> When do I use a servlet and how?
>
> Thank you!
> Magnus
>
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