我创建了登录类:
public class LoginPage extends VerticalPanel implements ClickHandler {
ApplicationMethods appMthd;
private RootPanel rootPanel;
TextBox txtUserEmail;
PasswordTextBox txtPassword;
Button btnLogin;
String strEmail, strPass;
public LoginPage(ApplicationMethods appMthd) {
this.appMthd = appMthd;
rootPanel = RootPanel.get();
rootPanel.setSize("320", "480");
btnLogin = new Button("Login");
btnLogin.setText("Login");
rootPanel.add(btnLogin, 224, 256);
btnLogin.setSize("79px", "35px");
btnLogin.addClickHandler(this);
txtUserEmail = new TextBox();
rootPanel.add(txtUserEmail, 36, 161);
txtUserEmail.setSize("240px", "20px");
txtPassword = new PasswordTextBox();
rootPanel.add(txtPassword, 36, 207);
txtPassword.setSize("240px", "20px");
}
@Override
public void onClick(ClickEvent event) {
// TODO Auto-generated method stub
if(event.getSource() == btnLogin)
{
strEmail = txtUserEmail.getText().toString();
strPass = txtPassword.getText().toString();
appMthd.onLogin(strEmail, strPass);
}
else
{
Window.alert("Coming Soon..!!");
}
}
}
但是我无法访问任何文本框或单击按钮。因为父类是根面板。
如果我使用 :
add(txtUserEmail);
add(txtPassword);
add(btnReg);
add(btnLogin);
btnLogin.addClickHandler(this);
然后,它是可访问的。在此,父类是 VerticalPanel。
那么,我该如何为RootPanel解决此问题。
请帮帮我。
提前谢谢。
使用 VerticalPanel 时,无法指定 x,y当然,如果要指定 x,y 可以扩展 AbsolutePanel但是,既然您正在为移动设备编程,这是一件好事。
如果你想用phonegap和gwt创建移动应用程序
您应该检查MGWT和Hello World MGWT
public LoginPage() {
rootPanel = RootPanel.get();
rootPanel.setSize("320", "480");
rootPanel.add(this);
btnLogin = new Button("Login");
btnLogin.setText("Login");
add(btnLogin);
btnLogin.setSize("79px", "35px");
btnLogin.addClickHandler(this);
txtUserEmail = new TextBox();
add(txtUserEmail);
txtUserEmail.setSize("240px", "20px");
txtPassword = new PasswordTextBox();
add(txtPassword);
txtPassword.setSize("240px", "20px");
}