Passing listbox id to modal in order to use it to a controller

asked 2019-05-29 18:42:46 +0800

GioZiak gravatar image GioZiak

updated 2019-05-30 11:45:04 +0800

cor3000 gravatar image cor3000
6280 2 7


I have a main.zul where i make a listbox with id "coursesEventsListboxProf".There i have a button that calls ModalDialogController (like the zk examples).In ModalDialogController i just do

Window window = (Window)Executions.createComponents( "professor_dialog.zul", null, null);



In professor_dialog.zul i just have a grid with 3 textboxes.There when the user fill out the textboxes, i have a button with id="subBtnmodal" and a controller called UserDataController from where i handle the values of textboxes. The thing is that i want to handle the listbox with the id "coursesEventsListboxProf" but i get NullPointerException (obviously) and i dont know how to "pass" it from main.zul. Thanks.

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answered 2019-05-30 10:55:08 +0800

hawk gravatar image hawk
3023 1 5
http://hawkphoenix.blogsp... ZK Team

updated 2019-05-30 11:53:04 +0800

Looks like there are at least 2 controllers with parent-child relationship. You can get a component reference of a parent page in a child page, but this approach makes 2 controllers more coupling.

Fire an event

It's better to post an event among them, e.g.

parent page can add an event listener for a custom event: window.addEventListener("onInnerButtonClicked", e -> {update listbox})

when a user clicked subBtnmodal, you just post an event like: Events.postEvent(window," onInnerButtonClicked")

Please refer to Inter-Page_Communication

Pass ID

you can pass id with the last arguments like:

Window window = (Window)Executions.createComponents( "professor_dialog.zul", null, Collections.singletonMap("listbox", "coursesEventsListboxProf"));

In the controller of professor_dialog.zul, you can get passed id with Execution.getArg()

refer to javadoc

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answered 2019-05-30 12:13:03 +0800

cor3000 gravatar image cor3000
6280 2 7

updated 2019-05-30 12:34:50 +0800

an alternative to Pass ID is to pass the component instance directly:

Window window = (Window)Executions.createComponents( "professor_dialog.zul", null, Collections.singletonMap("listbox", coursesEventsListboxProf));

In the controller of professor_dialog.zul

Listbox lb = (Listbox)Execution.getArg("listbox");

Still if sufficient I'd prefer the event based approach.

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Asked: 2019-05-29 18:42:46 +0800

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Last updated: May 30 '19

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