Mega Code Archive
Use deferred Command
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package com.rntsoft.gwt.client;
import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.core.client.GWT;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.ClickListener;
import com.google.gwt.user.client.ui.Grid;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.PasswordTextBox;
import com.google.gwt.user.client.ui.RootPanel;
import com.google.gwt.user.client.ui.TextBox;
import com.google.gwt.user.client.ui.Widget;
import com.google.gwt.user.client.ui.Hyperlink;
import com.google.gwt.user.client.Command;
import com.google.gwt.user.client.DeferredCommand;
import com.google.gwt.user.client.History;
import com.google.gwt.user.client.HistoryListener;
public class GWTClient implements EntryPoint,HistoryListener {
private static final String LOGIN_STATE = "login";
private static final String WELCOME_STATE = "welcome";
public void onModuleLoad() {
setupHistory();
}
private void setupHistory() {
History.addHistoryListener(this);
History.onHistoryChanged(LOGIN_STATE);
}
public void onHistoryChanged(String historyToken) {
if (LOGIN_STATE.equals(historyToken)) {
loadLoginView();
}
else
if (WELCOME_STATE.equals(historyToken)) {
loadWelcomeView();
}
}
private void loadLoginView() {
final Label loginPrompt = new Label("Login");
final Grid grid = new Grid(3, 2);
final Label namePrompt = new Label("name");
final TextBox nameTextbox = new TextBox();
final Label passwordPrompt = new Label("password");
final PasswordTextBox passwordTextbox = new PasswordTextBox();
final Button button = new Button("Login");
button.addClickListener(new ClickListener() {
public void onClick(Widget sender) {
History.newItem(WELCOME_STATE);
}
});
loginPrompt.addStyleName("loginPrompt");
nameTextbox.addStyleName("nameField");
passwordTextbox.addStyleName("passwordField");
DeferredCommand.add(new Command() {
public void execute() {
nameTextbox.setFocus(true);
}
});
grid.setWidget(0, 0, namePrompt);
grid.setWidget(0, 1, nameTextbox);
grid.setWidget(1, 0, passwordPrompt);
grid.setWidget(1, 1, passwordTextbox);
grid.setWidget(2, 1, button);
RootPanel.get().clear();
RootPanel.get().add(loginPrompt);
RootPanel.get().add(grid);
}
private void loadWelcomeView() {
final Label welcomeMsg = new Label("welcome");
welcomeMsg.addStyleName("welcomeMsg");
RootPanel.get().clear();
RootPanel.get().add(welcomeMsg);
RootPanel.get().add(new Hyperlink("logoutLinkText",LOGIN_STATE));
}
}
GWT-deferredCommand.zip( 3 k)
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