我有:
- 简单的嵌套演示者(ChannelPresenter),其中有包含记录的表(网格)。我需要在每个 ChannelPresenter.displayEditor() 调用中创建新的 ChannelEditorPresenter 实例。
- 弹出演示器小部件 (ChannelEditorPresenter),应在每次 ChannelEditorPresenter.edit() 调用中显示弹出窗口
目前,我正在将 ChannelEditorPresenter 注入(inject) ChannelPresenter 构造函数,但在本例中,我只有一个 ChannelEditorPresenter 实例。实际上,我每次通话都需要单独的弹出演示者。 (很多独立的窗口,每个窗口都有自己的数据)。
ChannelPresenter.java:
public class ChannelPresenter extends Presenter<ChannelPresenter.MyView, ChannelPresenter.MyProxy> implements ChannelUiHandlers {
public interface MyView extends View, HasUiHandlers<ChannelUiHandlers> {
void load();
}
@ProxyStandard
@NameToken(NameTokens.CHANNELS)
interface MyProxy extends ProxyPlace<ChannelPresenter> {
}
ChannelEditorPresenter channelEditorPresenter;
@Inject
ChannelPresenter(EventBus eventBus, MyView view, MyProxy proxy,
ChannelEditorPresenter channelEditorPresenter
) {
super(eventBus, view, proxy, ApplicationPresenter.SLOT_MAIN);
getView().setUiHandlers(this);
this.channelEditorPresenter = channelEditorPresenter;
}
@Override
protected void onBind() {
super.onBind();
getView().load();
}
@Override
public void displayEditor(Channel channel) {
// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
// Here I need to create new instance for each call
// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
addToPopupSlot(channelEditorPresenter);
channelEditorPresenter.edit(channel);
}
}
最佳答案
我在这里找到了解决方案:Instantiate a PresenterWidget (GWTP) manually
我需要注入(inject) com.google.inject.Provider
ChannelPresenter.java:
public class ChannelPresenter extends Presenter<ChannelPresenter.MyView, ChannelPresenter.MyProxy> implements ChannelUiHandlers {
public interface MyView extends View, HasUiHandlers<ChannelUiHandlers> {
void load();
}
@ProxyStandard
@NameToken(NameTokens.CHANNELS)
interface MyProxy extends ProxyPlace<ChannelPresenter> {
}
Provider<ChannelEditorPresenter> channelEditorPresenterProvider;
@Inject
ChannelPresenter(EventBus eventBus, MyView view, MyProxy proxy,
Provider<ChannelEditorPresenter> channelEditorPresenterProvider
) {
super(eventBus, view, proxy, ApplicationPresenter.SLOT_MAIN);
getView().setUiHandlers(this);
this.channelEditorPresenterProvider = channelEditorPresenterProvider;
}
@Override
protected void onBind() {
super.onBind();
getView().load();
}
@Override
public void displayEditor(Channel channel) {
ChannelEditorPresenter channelEditorPresenter = channelEditorPresenterProvider.get();
addToPopupSlot(channelEditorPresenter);
channelEditorPresenter.edit(channel);
}
}
关于java - GWTP 每次都会创建新的演示者,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/40774161/