Hide/show the ObjectChoiceField...
Hello
I have a screen that has hierarchical menus (ObjectChoiceFields). For example, category, subcategory, and Type.
Type of choice will fill a selection of the subcategory. Same subcategory will be filled based on the selection of the category. In some case there is no subcategories and Types for certain categories and so on for the subcategories. In this scenario, OS 5 and above to show the space reserved for the empty ObjectChoiceFields.
Is it possible to hide when I don't need them and show them only when I need it?
I really apprecaite your answer. If the solution is little complex so please give me an example on how to do it because I'm still growing in this area.
Thank you very much in advance,
Vincent
It's actually a pretty common question.
You can dynamically add and remove fields from managers, and when you do, these managers are re-built-out.
It means finding a way to determine when you should add and/or remove the category and Type. You can do this with a FieldChangeListener on the category field, will get called whenever the user switches to another choice in the categories available, you can add and delete (and repopulate) fields then, according to the selected index.
The next problem is where to 'Add' them. Normally, you just make one
but who's going to the field at the bottom of the Manager. Another option is
That you will get through the fields to the right place. How do detect you if the area has indeed been added. General, I do the following Manager m =
If (m == null) {} has not been added } else {} has been added } I hope that you get. As stated, this question was asked before, typically on the addition or deletion of checkboxFields. If you want more search for this. Good luck.
Tags: BlackBerry Developers
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