My GUI has two checkboxes, namely colourcheck and Texturecheck, below a single search button. If I click on the search button, it should check for both types mentioned above and respective program should run, also if both box are in 'MIN' position i.e., not checked it should give a message to user stating select type of search.
I've clipped search_callback program.
function Search_Callback(hObject, eventdata, handles)
% hObject handle to Search (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data
% --- Executes on button press in colourcheck.
function colourcheck_Callback(hObject, eventdata, handles)
% hObject handle to colourcheck (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data
% Hint: get(hObject,'Value') returns toggle state of colourcheck
if (get(hObject,'Value') == get(hObject,'Max'))
Search_Callback(hObject, eventdata, handles)
else
% Checkbox is not checked-take approriate action
end
However I am not able to meet the requirements. Please help me, any solution is appreciable.
From the description in your question, you don't want Search_Callback called when you click colourcheck_Callback. Instead you want some other action taken when the search button is clicked based on which check boxes are selected. You could use a callback like the following for your search button:
% --- Executes on button press in search.
function search_Callback(hObject, eventdata, handles)
% hObject handle to search (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
isTexture = get(handles.Texturecheck,'Value');
isColour = get(handles.colourCheck,'Value');
if and(isTexture, isColour)
'do something'
elseif isColour
'do something else'
elseif isTexture
'do something else'
else
'warn user'
end
guidata(hObject, handles);
Related
I am developing a GUI in Matlab and I would like to know which is the workflow when you click a button. Being more specific, I would like to know 'what happens' when I click a button, because its callback is not triggered.
If you are using GUIDE for developing, every time you add a button to your GUI a chunk of code is generated:
% --- Executes on button press in pushbutton1.
function pushbutton1_Callback(hObject, eventdata, handles)
% hObject handle to pushbutton1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
This function is called every time you push the said button. So, if you need something to be executed when you click the button you just need to add the lines of code you want to execute below that generated chunk of code. For example, imagine you have an edit text variable called edit1 with value
edit1 = 'hello';
If you want to interact with it you need to call handles, but first you need to create a global variable:
%set the current figure handle to main application data
setappdata(0,'figureHandle',gcf);
%set the handles to figure's application data
setappdata(gcf,'EDIT1',handles.edit1);
Then, in the callback function of your button you need write the following:
% --- Executes on button press in pushbutton1.
function pushbutton1_Callback(hObject, eventdata, handles)
% hObject handle to pushbutton1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
figureHandle = getappdata(0,'figureHandle');
EDIT1 = getappdata(figureHandle,'EDIT1 ');
new_string = 'updated string';
set(EDIT1, 'String', new_string);
Hope this helps
I am working on matlab gui. I have to call another gui on clicking a button in current gui. But i have to pass some values like a image and a text string from current gui to the new gui. How can i do this. I have simply open the new gui without passing any information.
function pushbutton8_Callback(hObject, eventdata, handles)
% hObject handle to pushbutton8 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
warning off;
choice = questdlg('Would you really want to goto next window ?', ...
'RESET Dialog', ...
'YES','NO','');
switch choice
case 'YES'
clc;clear all;close all;subpart;
case 'NO'
end
Lets suppose you pass the all the data you want through a struct called myData that is stored inside handles. Then you'd have to simply call
function pushbutton8_Callback(hObject, eventdata, handles)
% hObject handle to pushbutton8 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
warning off;
choice = questdlg('Would you really want to goto next window ?', ...
'RESET Dialog', ...
'YES','NO','');
switch choice
case 'YES'
mySecondGUI(handles.myData);
delete(hObject);
case 'NO'
end
This way your second gui recieves the information. The second thing you have to do is modifying your Openingfunction in your second gui:
mySecondGUID_OpeningFcn(hObject, eventdata, handles, varargin)
handles.theDataFromFirstGUI = varargin{1};
% ... Any initialisationstuff
guidata(hObject,handles);
In case you encounter problems with the old gui not properly closing I suggest you to read the articles regarding uiwait and uiresume: https://www.mathworks.com/help/matlab/ref/uiwait.html
I hope this helps, cheers Pablo
I created a GUI layout using Matlabs GUID application, essentially my problem is simple, i have a text box where I want to enter data, and a push button which i want to display that value entered inside the text box, the text box is define as
function edit1_Callback(hObject, eventdata, handles)
% hObject handle to edit1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
myString = get(hObject, 'String')
set(hObject,'Value',str2num(myString));
at this point, i entered some numerical value into the text box, lets say 44, now 44 is stored inside the "Value" element of hObject for this function.
Now I want to output this value when a button is pushed
function pushbutton1_Callback(hObject, eventdata, handles)
% hObject handle to pushbutton1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
fHandle = #edit1_Callback
get(fHandle,'Value')
^^^on this last line i should see some output(since i dont have a ";" which allows matlab to print out the data), the issue is....i get an error that says "Conversion to double from function_handle is not possible." , shouldnt I be able to call "get" using a function handle which points to my earlier function, thanks for any help!
I would go for
get(handles.edit1,'value')
All your uicontrols are stored in the handles. Knowing the tag of your uicontrol (for your edit box I guess this is edit1), you can get the handles of this object with handles.edit1.
You can even write
my_value = get(handles.edit1,'Value');
I want to view the number of the slice that I'm examining via a simple previous/next slice GUI. I store number of the slice that I'm viewing on handles.index and I'm able to update it via the previous, next pushbuttons.
I wrote the following on the edit text callback function:
function edit2_Callback(hObject, eventdata, handles)
handles.output=hObject
set (edit2.handles,'Tag', handles.index); %also tried with the 'String' property and failed
The Property is not updating when the code is running. It remains as 'Edit Text', what's wrong here?
Full Code, Dicom file
Duh, I made the update on the pushbutton callbacks, and it works fine :)
% --- Executes on button press in pushbutton2.
function pushbutton2_Callback(hObject, eventdata, handles)
% hObject handle to pushbutton2 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
handles.output = hObject;
handles.index = handles.index+1;
Cek (hObject, eventdata, handles);
imshow(handles.image_data(:,:,handles.index),'DisplayRange',[]);
set (handles.edit2,'String', handles.index);
I have created a simple GUI to preview webcam stream and to get snapshot from it. For this I have created on axes to show video, one push button(pushbutton1) to start preview, one push button(pushbutton2) to get snapshot. Following is the code for these two push buttons.
function pushbutton1_Callback(hObject, eventdata, handles)
% hObject handle to pushbutton1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
axes(handles.axes1);
vidObj = videoinput('winvideo',1);
videoRes = get(vidObj, 'VideoResolution');
numberOfBands = get(vidObj, 'NumberOfBands');
handleToImage = image( zeros([videoRes(2), videoRes(1), numberOfBands], 'uint8') );
preview(vidObj, handleToImage);
% --- Executes on button press in pushbutton2.
function pushbutton2_Callback(hObject, eventdata, handles)
% hObject handle to pushbutton2 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
a=getsnapshot(get(axes,'Children'));
imshow(a);
In pushbutton2_Callback I am trying to get child of axes ie. vidObj. But this gives me error ??? Undefined function or method 'getsnapshot' for input arguments of type 'double'.. Why is it returing double type instead of child object vidObj?
How can I fix it and get snapshot?
Is there any other better way?
(I just started learning GUI.)
Thanks.
A better alternative to declaring your variables global, is to use the handles structure for sharing data. GUIDE already uses this structure to store handles to all GUI components. Simply add your data as a field to this structure that gets passed around to all callback functions.
So inside the first callback:
function pushbutton1_Callback(hObject, eventdata, handles)
%# ... your existing code ...
%# store video object in handles, and persist
handles.vidObj = vidObj;
guidata(hObject,handles)
end
Then in the second, you can retrieve the video object from the handles structure:
function pushbutton2_Callback(hObject, eventdata, handles)
frame = getsnapshot(handles.vidObj);
imshow(frame);
end