uitable tooltip for long entries

Hello guys,

In uitable component, when there is not enough room for text to display, tooltip will be displayed with the full text. When the content of a cell is an numeric or cell array, it will show i.e. 1x4 cell. Is it possible to modify the tooltip functionality to display the content of these cells in a textual way such as below?

{'3', '2', 'text', 1}

Is there some callback that I haven't seen?

Some background can be found in this question https://uk.mathworks.com/matlabcentral/answers/499210-app-designer-tooltip-for-long-cell-content-in-uitable-is-covered-by-other-objects.

Thanks.

[Sachin]

Your problem is not clear. What do you want ?

[Mario Malic]

Thank you for the reply.

The tooltip in the picture below is displayed because it does not fit the column width.

I want to display the tooltip for this 1x2 cell to the cell contents {'3', '2'}.

Answer 1

[Jacob Mathew]

Hey @Mario Malic,

While this is not a direct solution on how to update the UI Tool Tip, there is a workaround where you can convert the cell array into string and print that instead. This allows the default UI Tool Tip behaviour to function as expected and display the whole content if there is overflow. You convert the cell array contents into string using the code below:

(Credit to @Stephen23 for suggesting formattedDisplayText() function as a replacement for evalc())

app.UITable.Data={'sample'};
myCellArray = {'1','2','text',4};
cellStr = char(formattedDisplayText(myCellArray));
app.UITable.Data(:,2)={cellStr};

The output is as follows when the above code is put into the StartupFcn() of the App:

This matches how the output would look like when you create a cell array and display it in the command line:

myCellArray = {'1','2','text',4}

myCellArray = 1×4 cell array
    {'1'}    {'2'}    {'text'}    {[4]}

[Mario Malic]

Appreciate the effort, however, evalc should be avoided.

[Stephen23]

"...evalc should be avoided."

Use https://www.mathworks.com/help/matlab/ref/formatteddisplaytext.html