Resize font size automatically when app window size is enlarged

I have built an application. The font size of the application when "Not-enlarged" is perfect. But when enlarged the font sizes dont increase so the all the font sizes look out of place and too tiny in an "enlarged" window of the app. How do i make the font sizes to automatically chnage/adjust with window size.

I tried with the Normalise option but did not help. similarly autoresize children option ON does not help either.

[Adam Danz]

> I tried with the Normalise option but did not help.

Why didn't setting font units to normalized solve the problem?

Answer 1

[Simon Chan]

You may try to use SizeChangedFcn callback to adjust the font size as a workaround.

The following example determine the new font size based ONLY on the vertical size of the figure. You may modify it according to your needs.

uif = uifigure;
defaultSize = uif.Position(4)-uif.Position(2);                      % Default vertical size of the figure
uif.AutoResizeChildren = 'off';
uif.SizeChangedFcn = {@changeFontSize,uif,defaultSize,fontSize};
fontSize = 12;                                                      % Default font size
uilabel(uif,'Position',[50 50 400 50],'Text','Change font size','FontSize',fontSize);
uitextarea(uif,'Position',[300 50 200 50],'Value','234','FontSize',fontSize);
function changeFontSize(src,event,uif,defaultSize,fontSize)
    newSize = uif.Position(4)-uif.Position(2);                      % New vertical size of the figure
    factor=newSize/defaultSize;                                     % A factor to determine new font size
    obj = findobj(uif.Children,'-property','FontSize');             % Extract objects with FontSize property 
    for k = 1:length(obj)
        obj(k).FontSize = factor*fontSize;                          % Change to a new font size
    end
end

[Toufique]

I tried, but unfortunately it does not work. I meant change of font in edit fields.

[Toufique]

even for a simple font it is not changing value: for eaxmple with app size change the following could not change the BrakeMassKgEditFieldLabel fontsize to 10. I dont know why.

----------------------------

function UIFigureSizeChanged(app, event)

app.BrakeMassKgEditFieldLabel.FontSize = 10;

end

[Walter Roberson]

If you were using R2022a or later, you could take advantage of the new fontsize function.

[Adam Danz]

+1 to @Walter Roberson's recommendation to consider fontsize().

The ideal solution is to set all font units to normalized.

Alternatively, you could use SizeChangedFcn in @Simon Chan's answer but instead of finding objects with a fontsize property, compute the change in figure size (newSize / oldSize) and use that ratio as a scale factor in fontsize(fig,scale=sfactor).

[Walter Roberson]

(The user marked R2020a, so they cannot use fontsize)