Je viens de commencer à apprendre Google Web Toolkit (GWT). Comment créer différentes pages HTML dans mon application GWT?
Par exemple, je veux créer une application pour une librairie. Dans cette application, je vais avoir trois pages:
Bien sûr, il pourrait y avoir d'autres pages telles que les détails de l'utilisateur, l'ajout d'un nouveau livre, etc.… Alors, quel est le meilleur moyen de créer différentes pages dans GWT et comment puis-je naviguer entre les pages? Existe-t-il des exemples ou des tutoriels? Ou dois-je même créer différentes pages lorsque je peux créer une application complète sur une seule page?
Ce que je fais habituellement dans des situations comme celle-ci, c'est d'abord concevoir le cadre de page Web. J'aurai un div pour l'en-tête, le menu latéral et le pied de page. J'aurai aussi une div
dans mon HTML pour le contenu principal.
Exemple:
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta name='gwt:module' content='org.project.package.Core=org.project.package.Core'>
</head>
<body>
<!-- Load the JavaScript code for GWT -->
<script language="javascript" src="ui/org.project.package.ui.Core.nocache.js"></script>
<!-- For some unknown reason in Internet Explorer you have to have cellpadding/spacing ON THE ELEMENT and not on the STYLE if it is in the body tag like this -->
<table id="wrapper" cellpadding="0" cellspacing="0" style="width: 100%;height: 100%;">
<!-- Header row -->
<tr style="height: 25%;">
<td colspan="2" id="header"></td>
</tr>
<!-- Body row and left nav row -->
<tr style="height: 65%;">
<td id="leftnav"></td>
<td id="content"></td>
</tr>
<!-- Footer row -->
<tr style="height: 10%;">
<td colspan="2" id="footer"></td>
</tr>
</table>
<!-- This iframe handles history -->
<iframe id="__gwt_historyFrame" style="width:0;height:0;border:0"></iframe>
</body>
</html>
(Si vous aimez les mises en page <div>, n'hésitez pas à les utiliser.)
Ensuite, vous construisez votre point d’entrée (dans mon cas, Core.Java
) comme vous le feriez normalement, en définissant chacun des éléments comme il convient.
RootPanel.get("header").add(new Header());
RootPanel.get("leftnav").add(new NavigationMenu());
RootPanel.get("footer").add(new Footer());
Il est bien sûr possible d’avoir un pied de page et un en-tête statiques, mais ce n’est ni ici ni là.
J'ai aussi une classe abstraite appelée "Contenu". Les objets de contenu s'étendent "Composite" et auront diverses méthodes pour simplifier la création et la mise en page d'une nouvelle page. Chaque page que je construis pour cette application, que ce soit un écran d'aide, un écran de recherche, un panier d'achat ou autre, est de type Content
.
À présent, je crée une classe appelée "ContentContainer". C'est un singleton qui est responsable de la gestion de l'élément "content". Il a une méthode "setContent" qui accepte les objets de type "Content". Il supprime ensuite fondamentalement tout ce qui se trouve dans le "contenu" <td> et le remplace par le widget (Composite) que vous affectez via la méthode "setContent". La méthode setContent gère également l'historique et la gestion de la barre de titre. Fondamentalement, ContentContainer sert à agréger tous les différents points de liaison que vous pourriez avoir à créer si le contenu de chaque page devait "connaître" toutes les fonctions qu’il devait exécuter.
Enfin, vous avez besoin d’un moyen d’accéder à cette page, non? C'est simple:
ContentContainer.getInstance().setContent(new Search());
Mettez ce qui précède dans un événement sur clic quelque part et vous êtes en or.
Les seuls éléments auxquels vos autres widgets doivent être liés sont le ContentContainer et le type de contenu qu'ils ajoutent.
Les inconvénients que je peux voir dans l'approche de ChrisBo sont que vous avez une liste qui doit être gérée de tokens -> pages. L'autre inconvénient que je peux voir est que je ne vois pas comment vous pouvez avoir un système d'historique réel avec cette méthode.
Une des choses qu’il offre par rapport à mon approche est que tous les choix de pages sont plutôt centralisés. J'utiliserais une sorte d'énumération ou au moins une classe statique avec des valeurs de chaîne pour m'empêcher d'empiéter sur des liens.
Dans les deux cas, je pense que le point peut être résumé comme suit: permuter le contenu de certains éléments de page centraux sur quoi votre utilisateur clique actions que vos utilisateurs effectuent.
J'utiliserais les classes HyperLink et History. La bonne chose à propos de la classe Hyperlien est qu’elle définit ce jeton (par exemple, # foobar) et qu’il ne vous reste plus qu’à saisir l’événement, qui est déclenché lorsque la valeur du jeton est modifiée (ValueChangeEvent). Dans eventHandler, vous devez alors remplacer les pages.
Exemple: Adresse de bienvenue Page: www.votre page.fr/#homesur cette page correspond à un lien vers la page "Parcourir le livre". Lorsque vous cliquez sur le lien, la nouvelle adresse ressemble à quelque chose comme ceci. : www.yourpage.com/#browse
Et voici le code:
public class MainEntryPoint implements EntryPoint, ValueChangeHandler {
VerticalPanel panel = new VerticalPanel();
Label label=new Label();
public void onModuleLoad() {
Hyperlink link1 = new Hyperlink("books", "browse");
Hyperlink link2 = new Hyperlink("user details", "details");
panel.add(link1);
panel.add(link2);
panel.add(label);
RootPanel.get().add(panel);
History.addValueChangeHandler(this);
//when there is no token, the "home" token is set else changePage() is called.
//this is useful if a user has bookmarked a site other than the homepage.
if(History.getToken().isEmpty()){
History.newItem("home");
} else {
changePage(History.getToken());
}
}public void onValueChange(ValueChangeEvent event) {
changePage(History.getToken());
}
public void changePage(String token) {
if(History.getToken().equals("browse")) {
label.setText("Here would be some books");
} else if (History.getToken().equals("details")) {
label.setText("Here would be the user details");
} else {
label.setText("Welcome page");
}
}
} </ pre> </ code>
Impressionnant! J'ai combiné la réponse de Chris R. avec celle de Chris Boesing pour proposer ceci:
Ceci est la page de démarrage 'index'
public class Index implements EntryPoint, ValueChangeHandler<String> {
public void onModuleLoad() {
History.addValueChangeHandler(this);
if (History.getToken().isEmpty()) History.newItem("index");
Composite c = new Login();
FlowControl.go(c);
}
public void onValueChange(ValueChangeEvent<String> e) {
FlowControl.go(History.getToken());
}
}
C'est le contrôleur, ou ContentContainer selon Chris R.
public class FlowControl {
private static FlowControl instance;
private FlowControl() {}
public static void go(Composite c) {
if (instance == null) instance = new FlowControl(); // not sure why we need this yet since everything is static.
RootPanel.get("application").clear();
RootPanel.get("application").getElement().getStyle().setPosition(Position.RELATIVE); // not sure why, but GWT throws an exception without this. Adding to CSS doesn't work.
// add, determine height/width, center, then move. height/width are unknown until added to document. Catch-22!
RootPanel.get("application").add(c);
int left = Window.getClientWidth() / 2 - c.getOffsetWidth() / 2; // find center
int top = Window.getClientHeight() / 2 - c.getOffsetHeight() / 2;
RootPanel.get("application").setWidgetPosition(c, left, top);
History.newItem(c.getTitle()); // TODO: need to change and implement (or override) this method on each screen
}
public static void go(String token) {
if (token == null) go(new Login());
if (token.equals("cart")) go(new Cart());
if (token.equals("login")) go(new Login());
// Can probably make these constants in this class
}
Ensuite, vous pouvez pointer les hyperliens et les boutons n’importe où dans votre code. (Je n'ai pas encore essayé les hyperliens.)
Button submit = new Button("Submit");
submit.addClickHandler(new ClickHandler() {
public void onClick(ClickEvent event) {
FlowControl.go(new MyScreen());
}
});
J'ai ajouté un div à mon HTML
<!-- This is where the application will reside within. It is controlled by FlowControl class. -->
<div id="application"></div>
Et maintenant, tous les écrans doivent appeler initWidget () dans le constructeur au lieu d’ajouter à RootPanel, car c’est maintenant une classe Composite, comme
initWidget(myPanel); // all composites must call this in constructor
Si vous voulez que ce soit FULL AJAXified (comme une application de bureau), vous n'avez besoin que d'une seule page. Ensuite, changez simplement le contenu du body en fonction du lien.
En outre, il existe un groupe Google pour GWT qui est très actif, et je sais que cela a déjà été demandé, vous devez simplement utiliser la fonction "recherche".
GWT Multipage - cadre simple pour applications multi-page-GWT.
J'ai utilisé Chloe S. answer (combinant la réponse de Chris R. avec celle de Chris Boesing) pour créer ce contrôleur d'application pour une application Web GWT fonctionnelle. La version en production est testée (et fonctionne% 100), mais cette version rédigée ci-dessous devra être modifiée pour s'intégrer à votre propre application (commencez par renommer les touches de page en éléments de menu).
AppController.Java
:
/**
* This App Controller utilizes two static inner-classes (Pages and External)
* to manage and server multiple pages with multiple sub-page (through their presenters)
* via String key constants which also serve as the literal text for the menu items.
*
* Pages are added as menu commands in their respective views:
* // Add menu items to the menu with commands:
* menuItems.put(Pages.PAGE1, mainMenu.addItem(Pages.PAGE1, new Command() {
* public void execute() {
* History.newItem(Pages.PAGE1);
* }
* }));
*
* Pages are fired as History tokens (from entry point Java class):
*
* **
* * Receives history events and pushes them to the AppController using a deferred command.
* * Changes the cursor to show waiting.
* * @param the value change token
* *
* public void onValueChange(ValueChangeEvent<String> e) {
* // check token to cover first historical "back" navigation:
* if(!History.getToken().isEmpty()) {
* AppController.waitCursor.execute(); // cursor is reset in page attach method
* }
* Scheduler.get().scheduleDeferred(new ScheduledCommand() {
* public void execute() {
* AppController.go(History.getToken());
* }
* });
* }
*
* Wait cursors are implemented as CSS:
*
* body.wait, body.wait * {
* cursor: wait !important;
* }
*
* NOTE: This page swapping implementation technique (based on the StackOverflow solution
* found here: [http://stackoverflow.com/questions/1061705/multiple-pages-tutorial-in-google-web-toolkit-gwt][1])
* differs from the obtuse and ancient 2010 GWT framework documentation in that the App Controller manages / handles
* adding the widget to the container, and therefore all the Presenters must implement the
* "AppControlPresenter" or "AppControlContainerPresenter" interface to give it access to their containers.
* (thus eliminating "public void go(final HasWidgets container);" method in all presenter architecture except for 'MainAppPresenter')
* There is also no event bus; static method calls are used for any needed interactivity.
*
* Includes a popup for pages still under construction.
*/
package com.;
import com.google.gwt.core.client.GWT;
import com.google.gwt.core.client.Scheduler;
import com.google.gwt.core.client.Scheduler.ScheduledCommand;
import Java.util.HashMap;
import Java.util.Map;
import com.google.gwt.dom.client.Style.Unit;
import com.google.gwt.event.logical.shared.AttachEvent;
import com.google.gwt.event.logical.shared.ResizeEvent;
import com.google.gwt.event.shared.HandlerManager;
import com.google.gwt.user.client.History;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.DecoratedPopupPanel;
import com.google.gwt.user.client.ui.Frame;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.Image;
import com.google.gwt.user.client.ui.LayoutPanel;
import com.google.gwt.user.client.ui.RootLayoutPanel;
import com.google.gwt.user.client.ui.RootPanel;
import com.google.gwt.user.client.ui.UIObject;
/**
*
*/
public class AppController {
/** */
public final static String DEFAULT_INITIAL_PAGE1_SUB_PAGE = Pages.PAGE_1A;
/** Singleton instance for the AppController */
private static AppController instance = new AppController();
/** Presenter for the main app */
private static MainAppPresenter mainAppPresenter;
/** container for the different views */
private static LayoutPanel container;
/** sub-container for the different sub-views */
private static LayoutPanel page1Container;
/** */
private static DecoratedPopupPanel popup;
/** constant for Style-Dependent names for menu items (see menu-style.css) */
public final static String MENU_ACTIVE_STYLE = "active";
/** constant for Style-Dependent class name in css */
public final static String CURSOR_WAIT_CLASS = "wait";
/** */
public final static String POPUP_DEMO_ID = "popupDemo";
/** */
public final static int DEMOP_POPUP_VERTICAL_OFFSET = 0;
/** */
public final static String POPUP_DEMO_STATEMENT = "<span class='text'>This page is under construction</span>"
+ "<span class='char'>…</span>";
/** */
public static ScheduledCommand waitCursor = new ScheduledCommand() {
@Override
public void execute() {
AppController.waitCursor(true);
}
};
/** */
public static ScheduledCommand normalCursor = new ScheduledCommand() {
@Override
public void execute() {
AppController.waitCursor(false);
}
};
/** Flag for determining if the page was reloaded */
private static boolean reloaded = false;
private static final LoginServiceAsync loginRpcService = GWT.create(LoginService.class);
/**
* Called on the resize event to set the position of the demo popup
* window to be adjusted to the correct dimensions (size and positoin)
* regardless of screen size.
*/
private static ScheduledCommand resetPopupDimensions = new ScheduledCommand() {
@Override
public void execute() {
if(!UNDER_CONSTRUCTION || popup == null) {
return;
}
int demoWidth = Math.round(Window.getClientWidth() / MainApp.PHI),
demoYPosition = Window.getClientHeight() / 2 - Math.round(popup.getOffsetHeight() / 2);
popup.setWidth(String.valueOf(demoWidth) + "px");
if(popup.getOffsetWidth() >= Window.getClientWidth()) {
popup.setWidth("100%");
popup.setPopupPosition(0, demoYPosition);
} else {
popup.setPopupPosition(Window.getClientWidth() / 2 - (popup.getOffsetWidth() / 2), demoYPosition);
}
}
};
/** */
private static final String LOGIN_OBJECT_NAME = "Login Presenter Object";
/**
* static inner-class for external websites
*/
public static class External {
/** The frame to contain the website */
private static Frame frame;
/** */
public static final String EXTERNAL_URL_1 = "http://";
/** */
public static final String EXTERNAL_URL_2 = "http://";
/**
* @returns true if the name of the token is equal to one of the URLs
* @param token the name to check
*/
public static boolean has(String token) {
return token.equalsIgnoreCase(EXTERNAL_URL_1) ||
token.equalsIgnoreCase(EXTERNAL_URL_2);
}
/**
* Gets the external Frame object
* @param url
* @return Frame
*/
public static Frame get(String url) {
if(frame == null) {
frame = new Frame(url);
frame.addAttachHandler(new AttachEvent.Handler() {
@Override
public void onAttachOrDetach(AttachEvent event) {
// hide the popup:
showPopup(false);
Scheduler.get().scheduleFinally(resetPopupDimensions);
Scheduler.get().scheduleFinally(normalCursor);
}
});
}
else if(!frame.getUrl().equalsIgnoreCase(url)) {
frame.setUrl(url);
}
return frame;
}
}
/**
* static inner-class for holding pages activated by the app's main menu commands
*/
public static class Pages {
/** */
public static final String PAGE1 = "foo";
/** */
public static final String PAGE2 = "bar";
/** */
public static final String PAGE_1A = "baz";
/** */
public static final String PAGE_1B = "qux";
/** */
public static String lastPage;
/** */
public static String lastPage1SubPage;
/** */
public static String unsavedMessage;
/** */
private static HashMap<String, AppControlPresenter> pageMap;
/** */
private static AppControlPresenter presenter;
/** */
private static Composite view;
/**
* initializes the hashmap of pages
*/
public static void init() {
pageMap = new HashMap<String, AppControlPresenter>();
}
/**
* @returns true if the name of the token is equal to one of the pages
* @param token the name to check
*/
public static boolean has(String token) {
return token.equalsIgnoreCase(PAGE1) ||
token.equalsIgnoreCase(PAGE2) ||
token.equalsIgnoreCase(PAGE_1A);
}
/**
* Gets the correct page container to display as a Composite
* @param page the token name of the page
* @return Composite page
*/
public static Composite get(String page) {
view = null;
presenter = null;
if(page.equalsIgnoreCase(PAGE1)) {
if(pageMap.get(PAGE1) == null) {
pageMap.put(PAGE1, new Page1Presenter(PAGE1));
page1Container = ((AppControlContainerPresenter) pageMap.get(PAGE1)).getContentPane();
}
presenter = pageMap.get(PAGE1);
lastPage = page;
mainAppPresenter.setCurrentMenuItem(page);
}
else if(page.equalsIgnoreCase(PAGE_1A) ||
page.equalsIgnoreCase(PAGE_1B) {
if(pageMap.get(PAGE1) == null) {
pageMap.put(PAGE1, new Page1Presenter(PAGE1));
page1Container = ((AppControlContainerPresenter) pageMap.get(PAGE1)).getContentPane();
}
presenter = pageMap.get(PAGE1);
lastPage1SubPage = page;
view = ((AppControlContainerPresenter)presenter).setCurrentPage(page);
}
else if(page.equalsIgnoreCase(PAGE2)) {
if(pageMap.get(PAGE2) == null) {
pageMap.put(PAGE2, new Page2Presenter(PAGE2));
}
presenter = pageMap.get(PAGE2);
lastPage = PAGE2;
mainAppPresenter.setCurrentMenuItem(page);
}
else if(External.has(page)) {
throw new Error("App Controller Error -- Use 'External' inner-class for: " + page);
}
else {
throw new Error("App Controller Error -- Page name not found: " + page);
}
if(view == null) {
view = (Composite)presenter.view();
}
view.addAttachHandler(new AttachEvent.Handler() {
@Override
public void onAttachOrDetach(AttachEvent event) {
AppController.showPopup(false);
presenter.updateAttachOrDetach(event);
Scheduler.get().scheduleFinally(resetPopupDimensions);
Scheduler.get().scheduleFinally(normalCursor);
}
});
return view;
}
/**
* Gets the current AppControlPresenter for the last page.
* @returns the current AppControlPresenter
*/
public static AppControlPresenter getCurrentPresenter() {
return presenter;
}
/**
* Gets an AppControlPresenter from the pageMap.
* @param token the name of the presenter
* @returns the AppControlPresenter
*/
public static AppControlPresenter getPresenter(String token) {
return pageMap.get(token);
}
/**
* Returns true if the page is already loaded.
* @param token name of the page
*/
public static boolean alreadyLoaded(String token) {
MainApp.debug(1, "[already loaded: " + presenter.toString() + " (token: " + token + ")");
return presenter.toString().equalsIgnoreCase(token);
}
/**
* Returns true if the page is visible
* @param page the token name of the page
*/
public static boolean isVisible(String page) {
UIObject component = pageMap.get(page).view();
return !(component.getOffsetHeight() == 0 && component.getOffsetWidth() == 0);
}
/**
* Returns true if the page is visible
* @param presenter the AppControlPresenter instance
*/
public static boolean isVisible(AppControlPresenter presenter) {
UIObject component = presenter.view();
return !(component.getOffsetHeight() == 0 && component.getOffsetWidth() == 0);
}
/**
* Returns true if the application has unsaved data.
* Iterates through all the pages and checks each presenter.
*/
public static boolean unsavedData() {
if(pageMap.isEmpty()) return false;
boolean unsaved = false;
for(Map.Entry<String, AppControlPresenter> entry : pageMap.entrySet()) {
AppControlPresenter presenter = entry.getValue();
if(presenter != null && presenter.unsavedData()) {
MainApp.debug(1, "(!) " + presenter.toString() + " has unsaved data");
unsavedMessage = presenter.dataDescription();
unsaved = true;
break; // just need to know one exists for now (window closing event)
}
}
return unsaved;
}
/**
* Called on a resize event on the window. Iterates through all the pages
* and tells their presenters to resize their content.
*/
public static void resize() {
for(Map.Entry<String, AppControlPresenter> entry : pageMap.entrySet()) {
AppControlPresenter presenter = entry.getValue();
if(presenter != null && isVisible(presenter)) {
presenter.resize();
}
}
}
} //end class Pages
/**
* @returns true if the history token is equal to any of the pages in the app
*/
public static boolean hasHistory() {
String token = History.getToken();
return External.has(token) || Pages.has(token);
}
/**
* Starts the login view at the root layout level
*/
public static void goLoginScreen() {
//check for reload:
if(hasHistory()) {
MainApp.debug(1, "(!) AppController has History on Login");
reloaded = true;
}
else {
reloaded = false;
}
RootLayoutPanel.get().clear();
RootLayoutPanel.get().add(new LoginPresenter(LOGIN_OBJECT_NAME).view());
}
/**
* @returns the last "Page1" page
*/
public static String getLastPage1Page() {
if(Pages.lastPage1SubPage == null || Pages.lastPage1SubPage.isEmpty()) {
Pages.lastPage1SubPage = DEFAULT_INITIAL_PAGE1_SUB_PAGE;
}
return Pages.lastPage1SubPage;
}
/**
* Tells the app to start with the Page1 page.
* @param username the username of the person logged-in
*/
public static void goMainApp(String username) {
//hide the login background:
RootPanel.getBodyElement().getStyle().setProperty("background", "none");
mainAppPresenter = new MainAppPresenter(username);
RootLayoutPanel.get().clear();
mainAppPresenter.go(RootLayoutPanel.get());
//get the center panel:
container = mainAppPresenter.getContainer();
//check for reload:
//NOTE: the token will be empty if the user refreshes
// and navigates all the way back to the zero-state
// from the login screen.
//NOTE: this logic may change after user-persistence is implemented
if(hasHistory() || History.getToken().isEmpty()) {
// reset the reloaded flag:
reloaded = false;
if(History.getToken().isEmpty()) {
//land on the first page:
History.newItem(AppController.Pages.PAGE1);
}
else {
MainApp.debug(2, "(!) AppController has History on reload: " + History.getToken());
History.fireCurrentHistoryState();
}
}
else {
//land on the first page:
History.newItem(AppController.Pages.PAGE1);
}
}
/**
*
*/
public static void checkIfSessionActive() {
loginRpcService.loginFromSession(new AsyncCallback<LoginSummary>() {
@Override
public void onFailure(Throwable throwable) {
goLoginScreen();
}
@Override
public void onSuccess(LoginSummary loginSummary) {
if (loginSummary.getErrorString() != null)
goLoginScreen();
else
goMainApp(loginSummary.getUser().getName());
}
});
}
/**
*
*/
public static void sessionLogout() {
DialogBoxWidget.confirm(200,
"Logout",
"Are you sure you want to log out?",
new ConfirmDialogCallback() {
@Override
public void onAffirmative() {
loginRpcService.logout(new AsyncCallback<Void>() {
@Override
public void onFailure(Throwable throwable) {
goLoginScreen();
}
@Override
public void onSuccess(Void aVoid) {
goLoginScreen();
}
});
}
@Override
public void onCancel() {
}
});
}
/**
* Shows or hides the "Under Construction" popup if UNDER_CONSTRUCION is true.
* @param show true to show and false to hide
*/
public static void showPopup(boolean show) {
if(MainApp.UNDER_CONSTRUCTION && popup != null) {
if(show) {
popup.show();
}
else {
popup.hide();
}
}
}
/**
* Called by every history event fired (including the back and forward buttons).
* Ignores the login and empty index historically.
* @param token the name of the page to load
*/
public static void go(String token) {
if(reloaded) {
normalCursor.execute();
}
if(token == null || token.isEmpty() || reloaded == true) return;
MainApp.debug("<history changed> - AppController.go()-> " + token);
// build the popup message for all unfinished pages:
if(MainApp.UNDER_CONSTRUCTION) {
if(popup == null) {
popup = new DecoratedPopupPanel(false);
popup.ensureDebugId(POPUP_DEMO_ID);
popup.addStyleDependentName(POPUP_DEMO_ID);
popup.setWidget(new HTML(new Image("images/workingman.png") + POPUP_DEMO_STATEMENT + new Image("images/workingmanFLIP.png")));
}
}
// check token for which page to return:
if(token.equalsIgnoreCase(External.EXTERNAL_URL_1)) {
MainAppPresenter.clearActiveMenuItems();
setExternalContentURL(External.get(token));
}
else if(token.equalsIgnoreCase(External.EXTERNAL_URL_2)) {
MainAppPresenter.clearActiveMenuItems();
setExternalContentURL(External.get(token));
}
else if(token.equalsIgnoreCase(Pages.PAGE1)) {
setContent(Pages.get(Pages.PAGE1));
setPage1Content(Pages.get(getLastPage1Page()));
}
else if(token.equalsIgnoreCase(Pages.PAGE_1A) ||
token.equalsIgnoreCase(Pages.PAGE_1B)) {
setContent(Pages.get(Pages.PAGE1));
setPage1Content(Pages.get(token));
}
else if(token.equalsIgnoreCase(Pages.PAGE2)) {
setContent(Pages.get(Pages.PAGE2));
}
else { // default behavior for a page not described:
MainApp.debug(2, "(!) Unknown page: " + token);
setContent(Pages.get(token));
}
}
/**
* Called by MainApp on a window resize event.
* @param e the ResizeEvent
*/
public static void resize(ResizeEvent e) {
Scheduler.get().scheduleDeferred(new ScheduledCommand() {
@Override
public void execute() {
if(mainAppPresenter != null) {
mainAppPresenter.resize();
}
Pages.resize();
Scheduler.get().scheduleFinally(resetPopupDimensions);
}
});
}
/**
* Changes the cursor to "wait" or "auto" depending on the parameter
* @param wait true to set the cursor to waiting
*/
private static void waitCursor(Boolean wait) {
if(wait) {
RootPanel.getBodyElement().addClassName(CURSOR_WAIT_CLASS);
}
else {
RootPanel.getBodyElement().removeClassName(CURSOR_WAIT_CLASS);
}
}
/**
* Private Constructor which initializes the Pages object.
*/
private AppController() {
Pages.init();
}
/**
* Sets the content of the main app container to one of the "Pages."
* @param c the Composite widget to be added
*/
private static void setContent(Composite c) {
container.clear();
container.add(c.asWidget());
}
/**
* Sets the content of the main app container an external URL.
* @param f the Frame by which external web sites are added
*/
private static void setExternalContentURL(Frame f) {
container.clear();
container.add(f);
// must reset the width and height every time:
f.getElement().getStyle().setWidth(100, Unit.PCT);
f.getElement().getStyle().setHeight(100, Unit.PCT);
}
/**
* Sets the content of the Page1 container to one of the sub pages.
* @param c the Composite widget to be added
*/
private static void setPage1Content(Composite c) {
page1Container.clear();
page1Container.add(c.asWidget());
}
}
AppControlPresenter.Java:
package com.*;
import com.google.gwt.event.logical.shared.AttachEvent;
import com.google.gwt.user.client.ui.Composite;
/**
* Base interface for all 'Presenters' used by AppController.Java
* NOTE: classes that implement this interface do not launch the presenter's view
* into the provided container; rather, the view is retrieved and used by the
* AppController instance by calling the 'view()' method
*/
public interface AppControlPresenter {
/**
* Gets the view (for use in AppController.Java)
*/
public Composite view();
/**
* Indicates if current search data is present and unsaved.
* @returns true to if a search is still active
*/
public boolean unsavedData();
/**
* Called on resize event to notify presenters with visible
* components that need resizing for different screen sizes.
* @returns true if elements were resized
*/
public boolean resize();
/**
* Called on attachEvents to tell the presenter to update.
* @param event the AttachEvent
*/
public void updateAttachOrDetach(AttachEvent event);
/**
* Gets the message to display for unsaved data.
* @returns a message String describing the data
*/
public String dataDescription();
/**
* Gets a fully qualified name for use in comparisons
* @return the name of this presenter used by the <code>AppController</code>
*/
public String toString();
}
AppControlContainerPresenter.Java:
package com.*;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.LayoutPanel;
/**
*/
public interface AppControlContainerPresenter extends AppControlPresenter {
/**
*
* @return
*/
public LayoutPanel getContentPane();
/**
*
* @param pageName
* @return
*/
public Composite setCurrentPage(String pageName);
}
Vous pouvez utiliser MVP Patern. Voici ma bibliothèque simple https://code.google.com/p/gwt-simple-mvp/wiki/GettingStarted .
Et vous pouvez diviser le code en plusieurs fichiers js. https://code.google.com/p/gwt-spliting/