StackPanel Change Handler

[Horizon]

Hello everybody, from a little of time i have started focusing on StackPanel in my app inventor instance and i have made some changes to it and extended it to this much

Now my query is that i want to add change handler to list box which contains all the categories(User Interface, Layout....) so that when it is changed then the content of stack panel also changes according to the category

Help will be appreciated

Thank You

[satyam8004]

Hide element on click

Elements in palatte section works fine; on click, element opens the list of attributes but it stays open until you click the other element but I want to add the feature to hide the element on click(or on double click) after the user is done with that it will add more flexibility to the user-interaction please give me feedback so that i will start working on this [userInterface] i have tried this by inspecting in chrome.

[Horizon]

I have the knowledge of GWT but I'm not getting the way it's made

[Horizon]

The issue has been resolved and now it's working fine, I have viewed the documentation of StackPanel and got to know that we can showStackPanel using index, i have took the index from that list box and now it's working fine

Thank you