Scrollbar not appearing in a Tab

Im trying to add a scrollbar to one Tab of my application, but it just doesnt seem to work.

The following image shows the Tab in question and also the hierarchy of the GUI components:

Both the Tab (app.PlotTab) and the GridLayout (app.PlotGridLayout) have their scrollable property set to true.

Now the basic idea is, that a number of plots can be generated via the "Basic Config" Tab and those will then be put into the app.PlotGridLayout. If those plots dont fit into the current size of the window a scrollbar should appear so the user could scroll to the plots that are outside of the visible window.

The plots are generated by this code:

no_total_axes = no_x_axes * no_y_axes;
no_columns = no_x_axes;
no_rows = no_y_axes;

%app.PlotGridLayout.RowHeight = repmat({300}, 1, no_rows);
for column = 1:no_columns
    for row = 1:no_rows
        c_ax = axes(app.PlotGridLayout);
        app.allAxes{row, column} = c_ax;
        app.PlotGridLayout.ColumnWidth{row} = 'fit';
        hold(c_ax, "on");        
        for line_no = 1:no_tables
            selectedTable = app.dataMap(app.TablesListBox.Value{line_no});
            plot(c_ax, selectedTable.(app.XAxesListBox.Value{column}), selectedTable.(app.YAxesListBox.Value{row}));
            

        end
        hold(c_ax, "off");
        c_ax.Layout.Row = 1;
        c_ax.Layout.Column = row;
    end
end %for column
  

The plot creation works fine, but as said, if there are too many plots then some of them will be beyond the end of the window and thus be not visible (and since there is no scrollbar also not reachable).

Answer 1

[Nivedita]

Hello Philip,

I understand that you are facing an issue with obtaining a scrollbar to one of the tabs in your application.

As you have mentioned that you have set the "Scrollable" property of both the tab and the grid layout to "True". The behaviour of the "Scrollable" property of the Grid Layout in MATLAB App Designer works differently. In order to scroll, the following conditions must be met:

• The sum of the values specified for the 'RowHeight' property of the grid layout manager must be larger than the height of the parent container.
• The sum of the values specified for the 'ColumnWidth' property of the grid layout manager must be larger than the width of the parent container.
• At least one row or column of the grid layout manager must be set to a fixed pixel height or width.
• The grid layout manager must contain components.

For more information on the properties of "Grid Layout", refer to the following documentation link:

https://www.mathworks.com/help/releases/R2021b/matlab/ref/matlab.ui.container.gridlayout-properties.html

I hope this helped!

Regards,

Nivedita.