MATLAB: UITable Scrollbars not showing and scrolling semi-INOP

MATLABscrollscrollbarsuitable

I have an app with UITable.  During operation I import data to the table with ~350 rows.  See image attached.

There is way more data than displayed, but the vertical scrollbar is not showing.

Sometimes I can use the scroll wheel to browse downward but it typically stops scrolling around 100-130 rows; I can never see the bottom of the data.

If I select a cell and use the down arrow it will walk down offscreen and back as if the table is fine… just not scrolling. Same for page down/up – the selected cell changes but scrolling does not follow.

The issue may be related to the creation code but I have yet to find the flaw… I've pasted the code below.

function handles = CreateTabbedPanels(handles)
    %Create tab group
    handles.tgroup = uitabgroup('Parent', handles.figure1,'TabLocation', 'top');
    handles.tab1 = uitab('Parent', handles.tgroup, 'Title', 'Pressure Plots');
    handles.tab2 = uitab('Parent', handles.tgroup, 'Title', 'Data Table');
    %Place panels into each tab
    handles.P1 = uipanel(handles.tab1);
    handles.P2 = uipanel(handles.tab2);
    %Reposition each panel to same location as panel 1
    set(handles.P2,'position',get(handles.P1,'position'));
    % Create Tab 1 items
    handles.ax1 = subplot(1,1,1,'Parent',handles.P1);
    % Create Tab 2 items - Create a data table 
    VarNames = {'Pressure','PumpEncoder','ZEncoder', ...
        'ZEncValid', 'PressureSlope','SlopeFault','PressureFault'};
    T = cell2table(cell(500,7), ...
        'VariableNames', VarNames);
    handles.uit1 = uitable('Data',T{:,:},'ColumnName',T.Properties.VariableNames,...
        'Units', 'Normalized', 'ForegroundColor', [0,0,0], ...
        'BackgroundColor',[0.9,0.9,0.9;0.82,0.82,0.82], ...
        'FontSize', 10, ...  %'FontWeight','bold', ...
        'Position',[0, 0, 1, 1], ...
        'Parent',handles.P2);
    % Place in upper left
     handles.uit1.Position = [0, 1-handles.uit1.Extent(4)-10, ...
         handles.uit1.Extent(3)+10,handles.uit1.Extent(4)+10];      
end

Best Answer

The last line of your code is resizing the UITable and pushing the vertical scroll bar out of the figure boundaries.

When you create the UITable,

 handles.uit1 = uitable('Data',T{:,:},'ColumnName',T.Properties.VariableNames,...
        'Units', 'Normalized', 'ForegroundColor', [0,0,0], ...
        'BackgroundColor',[0.9,0.9,0.9;0.82,0.82,0.82], ...
        'FontSize', 10, ...  %'FontWeight','bold', ...
        'Position',[0, 0, 1, 1], ...
        'Parent',handles.P2);

since the units are normalized and the position is [0 0 1 1] it is consuming the entire panel. This would result in the vertical scroll bar appearing along the right border of the panel.

But then the next line repositions the UITable.

     handles.uit1.Position = [0, 1-handles.uit1.Extent(4)-10, ...
         handles.uit1.Extent(3)+10,handles.uit1.Extent(4)+10];

What's your goal with that line? Note that extent is not a documented property of UITables.

Related Solutions

MATLAB: How to set the SelectionChangedFcn for the tabs group I have created

By writting the code like this:

%Setting the uipanel1 height, width and position as figure1
handles.uipanel1.Position = [0 0 handles.figure1.Position(3) handles.figure1.Position(4)];
%This line of code has to come before creating the tab group, otherwise the
%tabs won't have the same width height and position as figure 1, only the
%first one will.
% Create tab group with SelectionChangedFcn
handles.tgroup = uitabgroup('Parent', handles.figure1,'TabLocation', 'top','SelectionChangedFcn',...
    @(hObject,eventdata)Frogsim('tgroup_SelectionChangedFcn',hObject,eventdata,guidata(hObject)));
    % This line tells the uitabgroup function that the name of the callback
    % function for the selection change is named tgroup_SelectionChangedFcn
    % , and also sends in the input argument guidata(hObject) which is the
    % updated structure of handles and data , the eventdata is sent
    % automatically.
handles.tab1 = uitab('Parent', handles.tgroup, 'Title', 'Materials and Optics selection');
handles.tab2 = uitab('Parent', handles.tgroup, 'Title', 'Dispersion graphs');
handles.tab3 = uitab('Parent', handles.tgroup, 'Title', 'My Tab Label 3');
% Place panels into each tab
set(handles.uipanel1,'Parent',handles.tab1)
set(handles.uipanel2,'Parent',handles.tab2)
set(handles.uipanel3,'Parent',handles.tab3)
% Reposition each panel to same location as panel 1
set(handles.uipanel2,'position',get(handles.uipanel1,'position'));
set(handles.uipanel3,'position',get(handles.uipanel1,'position'));

Then the SelectionChangedFcn callback for the tab group called tgroup is set correctly. In this case my gui is called Frogsim , if your gui is called mygui then the third line should look like this:

    @(hObject,eventdata)mygui('tgroup_SelectionChangedFcn',hObject,eventdata,guidata(hObject)));

Later in the code I wrote the SelectionChangedFcn for tgroup like this:

% --- Executes on selection change of tabs in tgroup tab group.
function tgroup_SelectionChangedFcn(hObject, eventdata, handles)
% hObject    handle to tgroup (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

And then you can add whatever code you want to the selection change function.

To explain better what the third line did, the line of code:

@(hObject,eventdata)Frogsim('tgroup_SelectionChangedFcn',hObject,eventdata,guidata(hObject)));

creates an anonymous function that accepts the arguments

hObject
eventdata

then the anonymous function calls the function:

Frogsim('tgroup_SelectionChangedFcn',hObject,eventdata,guidata(hObject)));

what that does is to call the tgroup_SelectionChangedFcn function within Frogsim with arguments hObject and eventdata (That were passed inside by the anonymous function) and then the 3rd input argument is guidata(hObject) which will give the updated structure of handles and user data in a guide built gui, and that corresponds to the 3rd arguments of SelectionChangedFcn which is

handles

MATLAB: Uitabgroup with tabs from different .fig files

The problem is that what is defined in a .fig will always be a figure, not a panel that can simply be parented by your tab. A figure cannot be parented by anything.

One thing you could try (I haven't done so I'm not sure if it would work) is to launch your figure (i.e. the one that represent a single tab), making it invisible (you can set 'Visible' to 'off' in GUIDE itself.

Then, assuming everything you want within that .fig is in a panel you could try re-parenting the panel from the .fig to your uitab. This would probably involve some unpleasant use of findall or similar to fish the panel handle out of your invisible figure, but it might work.

I would suggest creating the simplest test case you can to see if this works rather than on your real code. Just create a .fig with a panel in it and some slider or whatever and then create your uitab on command line or in a script and try locating the panel handle from the launched figure and reparenting it.

Personally I tend to do programmatic UIs when I use tabs, but it is a big inconvenience (though GUIDE performance is so bad nowadays it is less of an inconvenience than it might have been!)

Best Answer

Related Solutions

MATLAB: How to set the SelectionChangedFcn for the tabs group I have created

MATLAB: Uitabgroup with tabs from different .fig files

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