pushbutton

Hi,

can you help me?

I have pushbutton and static text. I need: If I press pushbutton, the value in static text should increase with number 1.

Thank you for your help

Answer 1

[Kevin Holst]

Your code:

function pushbutton1_Callback(hObject, eventdata, handles) 
% nacitanie prvku 
h=findobj(0,'Type','figure','Tag','figure1'); 
UserData=get(h,'UserData'); 
prvok=0; 
if ((str2double(get(handles.pushbutton1,'string'))) == 1) 
for i=1:UserData.pocet_vetiev; 
prvok=prvok+1; 
end 
set(handles.text1, 'String',{prvok}); 
end

is auto-generated code from GUIDE that will be run every time the button is pushed. That's what the pushbutton callback function does. As such, you don't need to attempt to check if it is pushed, which is what I think you are trying to do here:

if ((str2double(get(handles.pushbutton1,'string'))) == 1)

the solution here is a one liner (two if you count the function identifier):

function pushbutton1_Callback(hObject, eventdata, handles) 
set(h.text1,'string',num2str(str2double(get(h.text1,'string'))+1))

That's what Sean meant by use the engine part of his code.

[john]

Thank you for explanation Kevin.

I have created this code, witch works good for me:

if (UserData.prvok < UserData.pocet_vetiev)

UserData.prvok=UserData.prvok+1

set(handles.prvok,'String',{UserData.prvok});

elseif (UserData.prvok > UserData.pocet_vetiev || UserData.prvok == UserData.pocet_vetiev )

set(handles.prvok, 'String','Zadane sú všetky prvky');

end

Result of set(h.text1,'string',num2str(str2double(get(h.text1,'string'))+1)) is NaN....I don't know why?....

[Kevin Holst]

Is the static text1 intialized with a number in it, or is it blank?

[Kevin Holst]

My guess is that text1 is starting out blank. If that's the case, then you'll need to either initialize it with a zero when your figure is loaded, or check in your pushbutton callback to see if it's blank and increment it to 1 if it is.

function pushbutton1_Callback(hObject, eventdata, handles)

if strcmp(get(h.text1,'string'),'')

set(h.text1,'string','1')

else

set(h.text1,'string',num2str(str2double(get(h.text1,'string'))+1))

end

[john]

if it is blank, result is NaN

if there is any initial value in text, result is OK.

So, in my program.....how can I set to 1 for value handles.prvok for example with button pushbutton2:

function pushbutton4_Callback(hObject, eventdata, handles)

h=findobj(0,'Type','figure','Tag','figure1');

UserData=get(h,'UserData');

if (UserData.prvok < UserData.pocet_vetiev)

UserData.prvok=UserData.prvok+1;

set(handles.prvok,'String',{UserData.prvok});

elseif (UserData.prvok > UserData.pocet_vetiev || UserData.prvok == UserData.pocet_vetiev )

set(handles.prvok, 'String','enough');

end

function pushbutton2_Callback(hObject, eventdata, handles)

UserData.prvok=1;

set(handles.prvok,'String',{UserData.prvok});

[john]

point 1. If I press button4, value increasing...this is OK.

point 2.If I press button2, value is set to 1....this is OK.

point 3. But, if I press in next step button 4, result is not 2, but result is value from point 1 + 1....

I don't understand

Answer 2

[Sean de Wolski]

figure;
ht = uicontrol('units','norm','position',[0.5 0.5 0.1 0.1],'style','text','string','0');
hp = uicontrol('style','push','string','Increment','callback',{@(src,evt,H)set(H,'string',num2str(str2double(get(H,'string'))+1)),ht});

[john]

Hi, thank you.

but I have function pushbutton1_Callback(hObject, eventdata, handles) and text1.

% --- Executes just before untitled is made visible.

function untitled_OpeningFcn(hObject, eventdata, handles, varargin)

% Choose default command line output for untitled

handles.output = hObject;

% Update handles structure

guidata(hObject, handles);

% --- Outputs from this function are returned to the command line.

function varargout = untitled_OutputFcn(hObject, eventdata, handles)

varargout{1} = handles.output;

% --- Executes on button press in pushbutton1.

function pushbutton1_Callback(hObject, eventdata, handles)

I don't need button 'Increment', please make it easier.

I want only press button "pushbutton1" and increase value to value for example: 1,1 .....or 2,2...or 3,3......but always increase with 1.

[Sean de Wolski]

Okay, so take the engine part of my code and translate it to yours. What I have above does _exactly_ what you asked for.

[john]

Sorry,

how Can I increase value without button "Increase", but with button "pushbutton1".

Sorry I'm not good in this.

Please help me

[john]

here is my code:

function pushbutton1_Callback(hObject, eventdata, handles)

% nacitanie prvku

h=findobj(0,'Type','figure','Tag','figure1');

UserData=get(h,'UserData');

prvok=0;

if ((str2double(get(handles.pushbutton1,'string'))) == 1)

for i=1:UserData.pocet_vetiev;

prvok=prvok+1;

end

set(handles.text1, 'String',{prvok});

end