How to accept only numbers in a edit text box?
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hi again, i need to input values at seven edit text box but i want to show a window withe erros alert when i input leters. using guide and callback functions it's easy but now i have this at the script:
Temp = uicontrol('style','edit',...
'units','pixels',...
'position',[25 364 101 31],...
'string','Inserir Temperatura.',...
'foregroundcolor','r',...
'callback',{@Temp_call});
pause(2)
S = get(0,'userdata');
str = '0';
set(Temp,'string',str,'foregroundcolor','k')
uicontrol(Temp)
function [] = Temp_call(varargin)
% Callback for secondary GUI editbox.
S = get(0,'userdata');
set(S.ed,'string',get(gcbo,'string')) % Set gui_passdata editbox string.
and with guide when i've done another project, i use this code:
input = str2num(get(hObject,'String'));
if (isempty(input))
set(hObject,'String','0')
end
guidata(hObject, handles);
can i use this code? i don't know how to use because there's no handles
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采纳的回答
Fangjun Jiang
2011-8-26
Temp = uicontrol('style','edit',...
'units','pixels',...
'position',[25 364 101 31],...
'string','Inserir Temperatura.',...
'foregroundcolor','r',...
'callback','@Temp_call');
function Temp_call(src,eventdata)
str=get(src,'String');
if isempty(str2num(str))
set(src,'string','0');
warndlg('Input must be numerical');
end
2 个评论
Jose Antonio Salcedo Simon
2017-12-18
编辑:Walter Roberson
2017-12-18
Hi Fangjun,
I'm a little new, could you give me a more detailed example?
I have this code:
caja_lonsat= uicontrol('style','edit','Units','normalized','pos',tex(29,:),...
'ForegroundColor','black','String',num2str(lonsat,'%4.2f'),...
'Horizontalalignment','left',...
'Backgroundcolor','white','Fontsize',12);
What else do I need? Thanks so much.
Walter Roberson
2017-12-18
caja_lonsat= uicontrol('style', 'edit', 'Units', 'normalized', 'pos', tex(29,:), ...
'ForegroundColor', 'black', 'String', num2str(lonsat,'%4.2f'), ...
'Horizontalalignment', 'left', ...
'Backgroundcolor', 'white', 'Fontsize', 12, ...
'Callback', @temp_call);
Along with
function Temp_call(src,eventdata)
str = get(src, 'String');
if isnan(str2double(str))
set(src, 'String',' 0');
warndlg('Input must be numerical');
end
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