I have four items(Types of soils) to be inserted in popup menu and the output should be integer values(porosities) displayed using a static text. How this can be done?
I guess you will be using GUIDE to create your GUI. Here is a simple code for populating a popup menu with pre-defined strings and use the selected item to change the displayed output in the static text:
1) In order to populate the popup menu, simply create a cell array of strings and set the 'String' property of the menu to that cell array:
% Create cell array
SoilTypes = {'Soil A' 'Soil B' 'Soil C' 'Soil D'};
% Set the string property of the popup menu:
set(handles.popupenu1,'String',SoilTypes);
2) Now the callback you are talking about seems to be the Selection Change callback, which might look like this:
function Popupmenu1_SelectionChangeFcn(hObject, eventdata, handles)
This gets executed when the user changes the selected item in the popupmenu. Therefore, you want to get the selected item with this line:
get(handles.popupmenu1,'Value')
So according the the previous cell array, you can use (among other options) a switch/case scenario in which you can do whatever stuff you want for every type of soil, such as displaying text in the static text box. You can also set directly the string in the text box like so:
SelectedItem = get(handles.popupmenu1,'Value') % Get the value, from 1 to 4 in your case
set(handles.text1,'String',SoilTypes{SelectedItem}); % Display the corresponding soil type
Hope that helps get you started!
Related
I want to get how many strings exist in the popup menu, how can this be done? This code that I have written does not seem to work.
length(get(handles.popupMenu,'Value'))
Value is the index of the currently selected item in the menu so it will only ever be a scalar. You instead want to check the length of the String property which contains a cell array of strings (one for each item).
nOptions = numel(get(handles.popupMenu, 'String'));
I have a popup-menu that has an option, add own material, and when this is chosen, a pushbutton is enabled that say SAVE. I alose have a bunch of edit-boxes.
What I want to do is to make a callback so whenever I click the SAVE, the data from one of the textboxes will possible to select in the popupmenu. when this is selected, I want to set the other edit-boxes to contain the same data that they did when I clicked the save button.
Thanks in advance
I'm not quite sure to fully understand what you want, but you can use the handle of the popup menu to get the string/string array in contains at the time you press the pushbutton. Then you can put those inside the textboxes using their handles as well.
For instance:
MyStrings = get(handlesToYourPopupMenu,'String');
or
MyStringsArray = cellstr(get(handlesToYourPopupMenu,'String'));
which contains the content of the popup menu as a cell array.
and
set(handlesToYourEditBox,'String',MyString);
Is that what you mean? If not please ask :)
EDIT:
To add the new data to the existing content of your text box, use concatenation. Since the content is in a cell array, you can do the following:
NewString = [OldString {CurrentString}];
where CurrentString is obtained with
get(hanlesToYourEditBox,'String');
Therefore to update the content of the popup menu you could write this:
set(handlesToPopUpMenu,'String',[MyStringsArray {get(hanlesToYourEditBox,'String')}]):
can somebody please tell me why my pop-up menu list get disappear when I set a string which actually belongs to one of the item in the list? I want this string to be appear as default when GUI gets open, however, want other items to be in the pop-up menu.
For example, pop-up list contains:
Set_1
Set_2
Set_3
Set_4 etc..
And, in the function OpeningFcn, I am settting:
set(handles.popupmenu1, 'String', 'Set_1');
This makes 'Set_1' to appear when I open GUI. However, it makes other items (Set_2, Set_3 etc) disappear from the GUI. Thanks.
The String property of a popupmenu uicontrol sets the entire text that is displayed in the menu.
To select a particular option, set the Value property to the index of the item to be selected. In this case, since Set_1 is the first item, set the Value property to 1.
I've a pop-up menu with 5,10,15,20 the contents in that menu. using switch I've created this
val=get(hobject,'value');
switch val
case '5'
n=5;
case '10'
n=10;
case '15'
n=15;
case '20'
n=20;
end
guidata(hObject, handles);
where it represents number of output images. On pressing search button in the same GUI window it calls another function where i need to use this 'n'.
for i = 1:n % Store top n matches...
tempstr = char(resultNames(index(i)));
fprintf(fid, '%s\r', tempstr);
disp(resultNames(index(i)));
disp(sortedValues(i));
disp(' ')
end
How can i pass this 'n' to that code or function?
any proper answer is appreciable.
Well, to start with your switch statement is incorrect and unnecessary. The Value property of a dropdown is not the text contained in the current selection, it is the index of the current selection in its list. To get the string value of the list item currently selected, you would do:
contents = cellstr(get(hObject,'String')) % returns contents as cell array
contents{get(hObject,'Value')} % returns value of selected item from dropdown
That is, of course, assuming hObject is a handle that points to your dropdown box - which it will be only if you're in a callback that was raised by the dropdown itself. Further to that, note that there is no need to convert the string value via a discretised switch statement; you can just use the str2num or str2double functions.
Finally, if you need to access the value of the dropdown from outside one of its own callbacks, you need to use the handles structure that is passed into every callback (or that, in your sample, is returned from guidata). There will be a field in handles with the same name as your dropdown - this will be the handle via which you can access its properties.
The way to pass information around a GUI is to use the the handles structure. If you created your GUI using GUIDE handles should have been created in the opening function. You can modify the opening function to add field and initial values to handles. For example, you could add the following to the opening function:
handles.n = 1; % This initializes handles.n to a default value in case the search button is
% pushed before an item in the menu is selected.
Then include the following in the call back for the menu to update and store the value of n:
handles.n = val; % This is updated every time an item from the menu is selected.
guidata(hObject,handles);
In the call back from the search button you can access the value of n and pass it to your other function like this:
n = handles.n;
myFunction(n);
Your other function will have start with something like this:
function [] = myFunction(n)
followed by the rest of the code you included above. You'll have to make sure myFunction.m is in the Matlab search path (can be set using addpath or by clicking the set path button in Matlab.)
I need to add/delete numerical values presented in the list box of MATLAB guide after selecting the number of values by the user. Also i need to update the listbox values using push button pressed
Somewhere in your opening function, before the line guidata(hObject, figure1), you should have some variable to keep track of your numbers. Declare something like
handles.numbers = {};
In general, if you have a cell array, cell_array, you can set the listbox like this. In the call back for your push button, first update the cell array and then load it into your list box using this line
set(handles.tag_of_listbox, 'String', handles.numbers, 'Value', 1);