GUI pop-up menu and push buttons

Hey guys,

I have completed my program last week and I have been asked by my supervisor to create a GUI for it. I have no knowledge about GUI and I have never worked on anything similar before.

I have two objects in my UI. I have a pop-up menu and a push button. The pop-up button gives 4 options and the push button is a START button where my code will start running as I it would normally do without the GUI.

Buy choosing something in the drop down menu and then pressing start I would like the program to set a variable equal to something and then start running my program. (hyper.m)

Any Ideas?

Thanks guys.

Answer 1

[Evan]

The way I would do things is put it all in the callback of your pushbutton. The "value" property of your popupmenu will allow to determine which option the user has selected, so you can get that from within the pushbutton callback.

So something like this, within the callback of your pushbutton:

v = get(handles.mypopupmenu,'Value'); %get currently selected option from menu
if v == 1
   %stuff here
elseif v == 2
   %stuff here
elseif v == 3
   %stuff here
elseif v == 4
   %stuff here
end

It's sort of hard to get specific beyond that, but hopefully that gives you a good starting idea. The main point is that the "get" function lets you get the properties of any uicontrol saved in handles.

Answer 2

[Matt Fig]

There are many ways to do this. Here is a simple example that may provide a skeleton for you to fill out.

function [] = gui_pop()
% Help goes here.

S.fh = figure('units','pixels',...
              'position',[300 300 300 100],...
              'menubar','none',...
              'name','gui_pop',...
              'numbertitle','off',...
              'resize','off');
S.pb = uicontrol('style','push',...
                 'unit','pix',...
                 'position',[10 15 280 20],...
                 'fontsize',12,...
                 'fontweight','bold',... 
                 'string','START',...
                 'callback',@pb_call);
S.pp = uicontrol('style','pop',...
                 'unit','pix',...
                 'position',[10 60 280 20],...
                 'fontsize',12,...
                 'fontweight','bold',... 
                 'string',{'1';'2';'3';'4'},...
                 'value',1);
guidata(S.fh,S)
movegui('center')

function [] = pb_call(varargin)
% Callback for pushbutton.
S = guidata(gcbf);
N = get(S.pp,{'string','value'});
N = str2double(N{1}(N{2})); % Convert to number.  May not need.
% Pass N to a function and display the results.
% This is where you can call any function on the path.
% I converted to a number, but you may need to keep the string
% depending on what your function expects.  I have no clue what
% your function does or what will be in the popup, So I give a 
% general example.
home
2^N

[Rahul jain]

u had written N = get(S.pp,{'string','value'});

it give me size of string and value in pop up menu but if i have string character in t and i want to get what string is it not the number so what i have to do

     pop_menu = uicontrol('Parent', gui, 'Style', 'Popupmenu', 'Units', 'normalized', 'Position', [.18 .08 .3 .15], 'String',{'red','green','orange'}, 'Value', 3, 'Callback', @popup_bar);

function [] = popup_bar(object,handles)
        pop_value=get(pop_menu,{'String','Value'})
end

in this code i want the value like red green orange not the position where is my green or red.

please help as soon as possible

[Walter Roberson]

pop_strings = get(pop_menu, 'String');
pop_val = get(pop_menu, 'Value');
result = pop_strings{pop_val};

[Ronn Concepcion II]

May I know the codes how to get the selected string(characters) on the pop-up menu? I will be using that string as a value of a variable. In my case, the pop-up menu contains the .csv filenames in a folder located at desktop. then after selecting the filename, it automatically plot the data on axis.

[Image Analyst]

Doesn't Walter's code do that? If you want a more modern OOP way, do it like this:

popStrings = handles.pop_menu.String; % All the strings in the menu.
selectedIndex = handles.pop_menu.Value;
selectedString = popStrings{selectedIndex};