MATLAB: Display trailing edge of a long strings of a listbox by hovering the mouse over the string

displayguiguidehtmllistboxlong stringsMATLABmouse hoverscrollstring

I have a listbox on which some strings are very long. I do not wish to make listbox too wide just becuase of these few long strings.
Is there anyway to display trailing edge of these long strings in my listbox by simply hovering the mouse over those strings without using scroll pane?
Maybe something like a "tooltip" for individual lines of the listbox?
Any HTML/JAVA hacks?

Best Answer

See https://undocumentedmatlab.com/blog/setting-listbox-mouse-actions
% Prepare the Matlab listbox uicontrol
hFig = figure;
listItems = {'apple','orange','banana','lemon','cherry','pear','melon'};
hListbox = uicontrol(hFig, 'style','listbox', 'pos',[20,20,60,60], 'string',listItems);
 
% Get the listbox's underlying Java control
jScrollPane = findjobj(hListbox);
 
% We got the scrollpane container - get its actual contained listbox control
jListbox = jScrollPane.getViewport.getComponent(0);
 
% Convert to a callback-able reference handle
jListbox = handle(jListbox, 'CallbackProperties');
% Set the mouse-movement event callback
set(jListbox, 'MouseMovedCallback', {@mouseMovedCallback,hListbox});
 
% Mouse-movement callback
function mouseMovedCallback(jListbox, jEventData, hListbox)
   % Get the currently-hovered list-item
   mousePos = java.awt.Point(jEventData.getX, jEventData.getY);
   hoverIndex = jListbox.locationToIndex(mousePos) + 1;
   listValues = get(hListbox,'string');
   hoverValue = listValues{hoverIndex};
 
   % Modify the tooltip based on the hovered item
   msgStr = sprintf('<html>item #%d: <b>%s</b></html>', hoverIndex, hoverValue);
   set(hListbox, 'Tooltip',msgStr);
end  % mouseMovedCallback
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