How to specify a callback function for the CellSelectionCallback property for runtime created Tables in App Designer?

Question

MrToad 2023-7-26

回答： Kevin Holly 2023-7-26

In App Designer:

Suppose that a TabGroup is created in App Designer's Design View, and that new tabs are simply added at runtime:

hTab = uitab(app.TabGroup,'Title',name_string);

Then suppose that a table is created as a child of the new tab, with a function specified for the CellSelection callback:

hTable = uitable(hTab,'CellSelectionCallback',@TableCellSelection);

The function TableCellSelection(app,event) is a private method in the app.

When the user selects some region of a successfully populated table, the following error results:

Undefined function 'TableCellSelection' for input arguments of type 'matlab.ui.control.table'.

Am I using an incorrect approach, or is this possibly a bug? Thanks.

Answer 1

Kevin Holly 2023-7-26

MrToad,

It seems like MATLAB cannot locate the function. You could call the function from outside the app. Please see the app and script attached.

In the example attached, I called the function with app as an input:

hTable = uitable(hTab,'CellSelectionCallback',{@TableCellSelection app});

To test to see if the function works, I had it make a label visible.

function TableCellSelection(table_handle,events,app)
    app.CellSelectionworksLabel.Visible = "on";
end