Select cell from UITable by mouse click and using a push button to execute a callback

Hi, I'm trying to create an app where I open several images from a folder and have them listed into a UITable (image filenames in x row: 1 column). I have already created this table and what I would like to do is select an image file from this list and use a push button to run my image processing algorithm in the UIAxes that I have created. I'm having trouble on how to create this callback and would love to hear a solotion to my problem, thanks. I am using r2020a by the way.

Answer 1

[Mario Malic]

Hi Raymond,

You need to create a CellSelection callback

Variable indices contains the index of selected row and column.

What might be a better way to process your image is to have the toggle button on/off, that will process your image if it's on, and do nothing if it's off.

% Cell selection callback: UITable
function UITableCellSelection(app, event)
    indices = event.Indices;
    if app.ToggleButton.Value
        filepath = app.UITable.Data{indices(1),indices(2)} % Not sure if this is correct way
%                                                            of getting filepath, as it depends
%                                                            on type of data in the cell, so verify  
        processImage(app, filepath)
    end
end

Otherwise, you could create a property that saves last selection and with the press of a button it would process file related to it.

% Cell selection callback: UITable
function UITableCellSelection(app, event)
    app.Last_Selection = event.Indices; 
end

% Button callback
ProcessImage(app) % Last_Selection is property of the app and doesn't need to be sent as an input arg