我正在使用 GWT MVP 和 UiBinder 创建一个带有 DockLayoutPanel 的应用程序。我希望南北码头是静态的,包含按钮和链接。我想在中心和东码头的两个不同区域拥有动态视图。由于这些动态区域应该是相互独立的,所以我为每个动态显示区域设置了不同的 ActivityMapper 和 ActivityManager;中、东上、东下。
加载应用程序时如何独立初始化这3个不同的显示区域?如何在一个显示区域从一个 Activity 切换到另一个而不影响其他区域?
当我使用 PlaceController 的 goTo 在一个区域从一个 Place 切换到另一个 Place 时,另一个区域的 Activity 会停止。
求救,求救,求救!
以下是我的一些代码:
AppViewImpl.ui.xml
<g:DockLayoutPanel styleName="{style.dockPanel}" unit="PX" width="975px" height="100%">
<!-- DOCK PANEL EAST -->
<g:east size="220">
<g:LayoutPanel styleName="{style.eastPanel}">
<g:layer left="0px" width="220px" top="0px" height="105px">
<g:SimpleLayoutPanel ui:field="topRightPanel"/>
</g:layer>
<g:layer left="0px" width="220px" top="110px" height="340px">
<g:InlineLabel styleName="{style.label}" text="ANOTHER DISPLAY AREA"/>
</g:layer>
</g:LayoutPanel>
</g:east>
<!-- DOCK PANEL NORTH -->
<g:north size="110">
<g:LayoutPanel styleName="{style.northPanel}">
<g:layer left="0px" width="755px" top="0px" height="105px">
<g:InlineLabel styleName="{style.label}" text="NORTH PANEL"/>
</g:layer>
</g:LayoutPanel>
</g:north>
<!-- DOCK PANEL SOUTH -->
<g:south size="20">
<g:LayoutPanel styleName="{style.southPanel}">
<g:layer left="0px" width="755px" top="0px" height="20px">
<g:InlineLabel styleName="{style.label}" text="SOUTH PANEL"/>
</g:layer>
</g:LayoutPanel>
</g:south>
<!-- DOCK PANEL CENTER -->
<g:center>
<g:SimpleLayoutPanel ui:field="mainPanel" />
</g:center>
</g:DockLayoutPanel>
我的模块.java
公共类 MyModule 实现 EntryPoint {
private Place defaultPlace = new DefaultPlace("");
public void onModuleLoad() {
// Create ClientFactory using deferred binding so we can replace with
// different impls in gwt.xml
ClientFactory clientFactory = GWT.create(ClientFactory.class);
EventBus eventBus = clientFactory.getEventBus();
PlaceController placeController = clientFactory.getPlaceController();
// Start ActivityManager for the main widget with our ActivityMapper
ActivityMapper topRightActivityMapper = new TopRightActivityMapper(clientFactory);
ActivityManager topRightActivityManager = new ActivityManager(topRightActivityMapper, eventBus);
topRightActivityManager.setDisplay(clientFactory.getAppView().getTopRightPanel());
// Start ActivityManager for the main widget with our ActivityMapper
ActivityMapper mainActivityMapper = new AppActivityMapper(clientFactory);
ActivityManager mainActivityManager = new ActivityManager(mainActivityMapper, eventBus);
mainActivityManager.setDisplay(clientFactory.getAppView().getMainPanel());
// Start PlaceHistoryHandler with our PlaceHistoryMapper
AppPlaceHistoryMapper historyMapper = GWT .create(AppPlaceHistoryMapper.class);
PlaceHistoryHandler historyHandler = new PlaceHistoryHandler(historyMapper);
historyHandler.register(placeController, eventBus, defaultPlace);
RootLayoutPanel.get().add(clientFactory.getAppView());
// Goes to place represented on URL or default place
historyHandler.handleCurrentHistory();
new AppController(clientFactory);
}
}
应用控制器.java
public class AppController implements AppView.Presenter {
private ClientFactory clientFactory;
AppController(ClientFactory clientFactory){
this.clientFactory = clientFactory;
goTo(new TopRightAPlace(""));
}
@Override
public void goTo(Place place) {
clientFactory.getPlaceController().goTo(place);
}
}
TopRightAViewImpl.java
public class TopRightAViewImpl extends Composite implements TopRightAView {
interface Binder extends UiBinder<Widget, TopRightAViewImpl> {
}
private static final Binder binder = GWT.create(Binder.class);
private Presenter listener;
@UiField
Button button;
public TopRightAViewImpl() {
initWidget(binder.createAndBindUi(this));
}
@Override
public void setName(String name) {
button.setHTML(name);
}
@Override
public void setPresenter(Presenter listener) {
this.listener = listener;
}
@UiHandler("button")
void onButtonClick(ClickEvent event) {
listener.goTo(some other place);
}
}