Display Value of a Slider in a text box without GUIDE

Question

Laurent 2020-1-8

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/499395-display-value-of-a-slider-in-a-text-box-without-guide

评论： Laurent 2020-1-8

Im struggling to find informations about how to display Data on a GUI without GUIDE.

More specificaly I have a slider 0->1 that I use to set my Threshold value (Image processing). I want the User to be able to see which value the slider is currently set to and changes brought to it.

There is no error Code but the value isnt showing up/ getting updated (Stays at 0)

These are fragments of my Code, please tell me if you need to see the whole thing:

fig = figure('Visible', 'on','Position',[0,0,1715,895], ...
           'Name', 'Projekt Matlab Workshop','Numbertitle','off', 'MenuBar', 'none')
       
           %... GUI Elements
           
           slider = uicontrol('Style','slider','Min',0,'Max',1,'Value',0.5,...                  
            'SliderStep',[0.025 0.05],'Position',[685,205,350,35]);
        
           % ... Labels
           
           lbl_schwellwertAnzeige = uicontrol('Style','text','String',num2str(get(slider, 'Value')),...
            'Position',[1040,150,10,30], 'FontSize', 11);

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Answer 1

Stephen23 2020-1-8

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https://ww2.mathworks.cn/matlabcentral/answers/499395-display-value-of-a-slider-in-a-text-box-without-guide#answer_409169

编辑：Stephen23 2020-1-8

在 MATLAB Online 中打开

If you want the slider to update something (text, plot, anything) as it moves, then you will need to add a listener:

https://www.mathworks.com/help/matlab/ref/handle.addlistener.html

Here is a complete working solution for pre-R2014b MATLAB, that updates an edit box while dragging the slider:

ht = uicontrol('style','edit','Position',[10,60,40,40]);
hs = uicontrol('style','slider','Position',[10,10,400,20]);
fun = @(o,e)set(ht,'String',num2str(get(e,'NewValue')));
addlistener(hs, 'Value', 'PostSet',fun);