MATLAB: Removing uitable cell selection highlight

guiuitable

Hi,

I have a uitable that includes a checkboxes in column 1 and string-valued entries in column 2. Some of the entries may be "ghosted", which is faked by prepending HTML tags to change their font color to gray. A corresponding bitvector keeps track of the ghosted rows. Clicking in either column on a ghosted row is ignored, with an immediate return from the CellSelectionCallback routine.

This works OK except for one annoyance: When a ghosted string (column 2 of a ghosted row) is clicked, the blue cell selection highlight remains on after the return from the callback. A subsequent click in column 1 of the same row, will remove it, but that's not a good solution. Can anyone suggest a way to programmatically remove it ("deselect" the clicked cell)?

BTW, I just purchased Yair Altman's excellent book Undocumented Secrets of MATLAB-Java Programming, but this doesn't seem to be a covered topic.

Best Answer

This is covered (briefly) at the bottom of page 169 of my book...

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MATLAB: Select a cell from a uitable using two edit boxes

Matlab R2021a and later

Starting in Matlab R2021a, you can programmatically scroll to any row, column, or cell of a uitable using the scroll function (see Four New App Features in MATLAB R2021a).

Syntax examples:

scroll(uit,vlocation) where vlocation is 'top'-'bottom'
scroll(uit,hlocation) where hlocation is 'left'-'right'
scroll(uit,target,targetIndex) where target is 'row'-'column'-'cell' and targetIndex is a row or column number or a 1x2 cell location.

Prior to R20201a

Here's a method to programmatically select a cell which highlights the chosen cell as if it were just selected manually. This requires FEX: findjobj(); credit to this answer .

% Create a working UI table for the example
f = figure;
t = uitable(f,'Data',randi(100,10,3),'Position',[20 20 262 204]);
% Select row and col numbers
row = 2; 
col = 3; 
% Select cell programmatically
jUIScrollPane = findjobj(t);
jUITable = jUIScrollPane.getViewport.getView;
jUITable.changeSelection(row-1,col-1, false, false);

If you're trying to act on that cell by applying a function to the cell's content, you might not have to actually highlight it and you could avoid the 3rd party function.

MATLAB: Doesn’t ButtonDownFcn work for left-click

Look at the documentation for a uicontrol's ButtonDownFcn, Callback, and Enable properties. The ButtonDownFcn for a uicontrol will execute on left-click if the uicontrol is not enabled (off or inactive.) If the uicontrol is enabled, its Callback executes instead.

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MATLAB: Select a cell from a uitable using two edit boxes

MATLAB: Doesn’t ButtonDownFcn work for left-click

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