enable context menu for specific cell or item in uitable or uilistbox in matlab

This is a cross posting from:

https://stackoverflow.com/questions/70468931/enable-context-menu-for-specific-cell-or-item-in-uitable-or-uilistbox-in-matlab

Had no luck there so far.

Basically, I'd like to know how to get a context menu to fire on a specific item in a uitable or uilistbox. There seems to be no way to do this without first click on an entry, and then right clicking at the exact same location and assuming that the user hasn't moved their mouse. Even this double clicking approach (left, then right) would be super awkward.

Answer 1

[Jim Hokanson]

Here's a solution with left click. Couldn't get right to work. More info at linked StackOverflow page above. Code copied here:

classdef wtf < handle
    properties
        h %struct, this was an appdesigner handle
        cm %context menu
    end
    methods
        function obj = wtf()
            h = struct;
            h.UIFigure = uifigure();
            h.UITable = uitable(h.UIFigure);
            obj.h = h;

            obj.h.UITable.SelectionChangedFcn = @obj.tableCall;
            %Some data ...
            s = struct;
            s.a = (1:4)';
            s.b = (5:8)';
            obj.h.UITable.Data = struct2table(s);

            %Our context menu
            cm = uicontextmenu(obj.h.UIFigure);
            m = uimenu(cm,'Text','Menu1');
            obj.cm = cm;

            %WTF ... without this we don't get a valid CurrentPoint
            obj.h.UIFigure.WindowButtonMotionFcn = @obj.mouseMove;
            
        end
        function tableCall(obj,x,y)
            cp = get (obj.h.UIFigure, 'CurrentPoint');
            open(obj.cm,cp(1),cp(2));
            selected_cell = y.Selection;
            %Now we can run something on the context menu
            %that targets the selected cell
        end
        
        function mouseMove(obj,x,y)
            %we could store a point here
        end
    end
end

Answer 2

[Jasmine Poppick]

Starting in R2023b, you can use the InteractionInformation property of the ContextMenuOpeningFcn callback event data to query the table cell or listbox item that was right-clicked to open the context menu, and then show or hide the context menu based on whether you want the menu items to appear.

Here is an example in the documentation that shows how to selectively show a context menu on certain parts of a table.