How to limit input formats in an edit text box?

2013 6 26
3 个回答
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0 个投票

In my GUI (programmatic one) there is an edittext box, used to enter coeeficients.
I need to check the format of input and allow only to these types:
5
0.5
1.6
5.9
0.4565132
5.0000
00000.5
Then I'll save them and call back.

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Tom
Tom 2013-6-26

1 个投票

STR2DOUBLE catches most of those things and outputs NaN if the number isn't valid. The only thing is that it will handle commas. I used REGEXPREP to switch any commas with asterisks so str2double can't process it.
validStr = {'5'
'0,5'
'1.0.6'
'5.9'
'0.4565132'
'5.0000'
'00000.5'};
validStr = regexprep(validStr,',','****');
str2double(validStr)

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Tom
Tom 2013-6-26

0 个投票

validStr = {'5'
'0.5'
'1.6'
'5.9'
'0.4565132'
'5.0000'
'00000.5'};
if any(strcmp(get(hEditBox,'String'),validStr))
%code
else
warndlg('Edit box string is not valid.')
end

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Ozan Oguz
Ozan Oguz 2013-6-26
Ok. I guess I cant explain it correctly.
It is like this:
There is a box to enter a coefficient (this can be any real number, and only one of it)
We can't use letters, comma or any other character (except numbers and a single dot, as in 0.04415 or 30.8)
Coefficient can be any real number in the correct format: Just numbers and only a single dot for decimals, if needed.
Thx.

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Sean de Wolski
Sean de Wolski 2013-6-26

0 个投票

Why not just use a popupmenu?
uicontrol('style','popupmenu','string',{'0.5','3.14','1.6'})

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Ozan Oguz
Ozan Oguz 2013-6-26
Ok. I guess I cant explain it correctly.
It is like this:
There is a box to enter a coefficient (this can be any real number, and only one of it)
We can't use letters, comma or any other character (except numbers and a single dot, as in 0.04415 or 30.8)
Coefficient can be any real number in the correct format: Just numbers and only a single dot for decimals, if needed.
Thx.

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