Can I see the values that at the slider ?

Hello,

Can I see or can I get the values that at the slider ?

You can see the slider tabs and I need to see the values at the slider. For instance, the value of the top is 0.75, and I need to see 0,75 at the gui panel. Can you help me?

Thank you

Answer 1

[Adam Danz]

You can access the slider value from the handle to the slider. I don't know if you're using 'guide' or 'appdesigner' (or neither) but you'll use the same method either way. Here's a demo

fig = uifigure;
h = uislider(fig);
% h is the handel to your slider
sliderValue = h.Value; 

If you want to display that on your GUI you'll need to add a static text box that displays the value.

[metin eroglu]

Thank you for answer.

Here is my slider code and 2nd code is static text code but I could not put right code to static text code.

% This is slider code
% --- Executes on slider movement.
function slider5_Callback(hObject, eventdata, handles)
% hObject    handle to slider5 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'Value') returns position of slider
%        get(hObject,'Min') and get(hObject,'Max') to determine range of slider

global im_adjust_low
sliderVal = get ( hObject , 'Value' ) ;
% set ( handles.testNum, 'String', num2str (sliderVal)   ) ;
% factor = num2str (sliderVal) ;
im_adjust_low =  (sliderVal) ;


--------------------------------------------
% This is static text code
% --- Executes during object creation, after setting all properties.
function text35_CreateFcn(hObject, eventdata, handles)
% hObject    handle to text35 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called
fig = uifigure;
h = slider5(fig);
% h is the handel to your slider
sliderVal = h.Value; 

[Adam Danz]

The handles to all of your GUI elements are stored in 'handles' which is the 3rd input to both of your functions. You need to know the handle to your text box which I'll call handles.textbox for now.

In the slider callback function, you can change the text in the textbox every time the slider is changed.

function slider5_Callback(hObject, eventdata, handles)
    handles.textbox.String = sprintf('%.1f', hObject.Value);  % round to 1 dp
end

Please don't use global variables.

[metin eroglu]

Hello again my friend, I did it success with different way I think. I just add that code.

Here, my value is stored in "sliderVal". and I just write that

set ( handles.text38,'String',sliderVal);

So all code is that :

function slider5_Callback(hObject, eventdata, handles)
% hObject    handle to slider5 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'Value') returns position of slider
%        get(hObject,'Min') and get(hObject,'Max') to determine range of slider

global im_adjust_low
sliderVal = get ( hObject , 'Value' ) ;
% set ( handles.testNum, 'String', num2str (sliderVal)   ) ;
% factor = num2str (sliderVal) ;
im_adjust_low =  (sliderVal) ;
%handles.text38.String = sprintf('%.1f', sliderVal);  % round to 1 dp
set ( handles.text38,'String',sliderVal);

Thank you again broadening my horizon : )

[Adam Danz]

I see. Newer versions of matlab allow for dot notation to access properties instead of set() and get(). More info: https://www.mathworks.com/help/matlab/creating_plots/access-and-modify-property-values.html

That's one difference in your line of code. The other difference is that I converted the sliding value to a string and rounded to 1 decimal place whereas you're entering the value directly as text. Both methods are OK.

Congrats for solving it!