This document provides an overview and examples of how to program a graphical user interface (GUI) using GUIDE in MATLAB. It discusses callback functions and shows code examples for different GUI components like push buttons, toggle buttons, radio buttons, check boxes, edit texts, list boxes, pop-up menus, panels, button groups, and axes. It also provides a simple example of designing a calculator app with GUIDE using these various components and their callback functions.

1. Programming a GUIDE
GUI
Prepared by:
Mahmoud Hikmet
Mostafa Majid

2. Working with Callbacks in GUIDE
How to Use the Example Code
Push Button
Toggle Button
Radio Button
Check Box
Edit Text
Slider
Topics:
List Box
Pop-Up Menu
Panel
Button Group
Menu Item
Table
Axes

3. Working with Callbacks in GUIDE

4. Working with Callbacks in GUIDE

5. display( 'Goodbye' );
close(gcf);
Push Button
Toggle Button
button_state = get(hObject, 'Value' );
if button_state == get(hObject, 'Max' )
display( 'down' );
elseif button_state == get(hObject, 'Min' )
display( 'up' );
end

6. Radio Button & Check Box
if (get(hObject, 'Value' ) == get(hObject, 'Max' ))
display( 'Selected' );
else
display( 'Not selected' );
end

7. Edit Text
input = get(hObject, 'String' );
display(input);
Strings
Retrieve Numeric Values
input = str2double(get(hObject, 'string' ));
if isnan(input)
errordlg( 'You must enter a numeric value' , 'Invalid Input' ,
'modal' )
uicontrol(hObject)
return
else
display(input);
end

8. List Box & Pop-Up Menu
items = get(hObject, 'String' );
index_selected = get(hObject, 'Value' );
item_selected = items{index_selected};
display(item_selected);

9. Panel
display( 'Mouse button was pressed' );
Resize the Window and Panel
By default, GUIDE GUIs cannot be resized, but you can
override this behavior by
selecting Tools > GUI Options and
setting Resize behavior to Proportional.
set(hObject, 'Units' , 'Points' )
panelSizePts = get(hObject, 'Position' );
panelHeight = panelSizePts(4);
set(hObject, 'Units' , 'normalized' );
newFontSize = 10 * panelHeight / 115;
texth = findobj( 'Tag' , 'text1' );
set(texth, 'FontSize' ,newFontSize);

10. Button Group
Button groups are similar to panels, but they also manage
exclusive selection of radio buttons and toggle buttons.
When a button group contains multiple radio buttons or
toggle buttons, the button group allows the end user to
select only one of them.
switch get(eventdata.NewValue,'Tag')
case 'radiobutton1'
display( 'Radio button 1' );
case 'radiobutton2'
display( 'Radio button 2' );
case 'togglebutton1'
display( 'Toggle button 1' );
case 'togglebutton2'
display( 'Toggle button 2' );
end
.

11. Axes & Slider
a=get(handles.slider1,'Value');
x=0:0.1:50;
y=sin(x*a);
plot(handles.axes1,x,y)

12. Simple Project
Design Calculator
By Mat lab

13. • Design the calculator

14. • In the button write this code
a= str2num(get(handles.edit1,'string'));
b= str2num(get(handles.edit2,'string'));
c=a+b;
set(handles.text3,'string',c);
• In the button write this code
a= str2num(get(handles.edit1,'string'));
b= str2num(get(handles.edit2,'string'));
c=a-b;
set(handles.text3,'string',c);

15. • In the button write this code
a= str2num(get(handles.edit1,'string'));
b= str2num(get(handles.edit2,'string'));
c=a*b;
set(handles.text3,'string',c);
• In the button write this code
a= str2num(get(handles.edit1,'string'));
b= str2num(get(handles.edit2,'string'));
c=a/b;
set(handles.text3,'string',c);

16. Thank you