I have solved with my attempt but this is running only on "Debug mode" and not in "Normal Mode"
I have a Appdesigner GUI MATLAB. I have a button, and there is a loop like this
function RUN()
t=1:0.01:3600;
for i=1:numel(t)
y(1,i)=readValue();
plot(t(1:i),Tco(1:i));
pause(0.02)
end
end
function BUTTON_PRESS()
%BREAK FROM THAT LOOP
end
I want to break this loop when I click my button
My attempt(WORKS IN DEBUG MODE BUT NOT IN NORMAL)
2nd pic: In appdesigner inside a callback to a button "PLOT AND SIM" I passed a function main_plot_function()
1st pic: shows that main_plot_function Now "STOP BUTTON " appears but clicking on that it doesn't stops loop of plotting nor it print "BUTTON!!"
But none of them worked.
increasing the pause timer worked seamlessly to break the loop!
Related
I am having a GUI figure, which contains some buttons, I want to show waitbar on the same GUI window on which buttons are placed, I tried different solutions but in vain. e.g when user clicks on button it starts showing me waitbar on left bottom side of the figure.
You could try to add a java waitbar in your figure.
Put this in the OpeningFcn
PB=javaObjectEDT(javax.swing.JProgressBar);
javacomponent(PB,[10,10,200,20],gcf); %put at bottom part of the current figure
set(handles.output.Children(1),'Tag','first_bar'); %make sure you can find it back
In the callback of any function you can then set the bar to a value between 0 and 100 using this code:
h=findobj(handles.output.Children,'Tag','first_bar');
set(h.JavaPeer,'Value',rand(1)*100)
You can make it visible or invisible just as you would any GUI object in Matlab using
h=findobj(handles.output.Children,'Tag','first_bar');
set(h,'visible','off');
Here you can find details about the JProgressBar . For example using this you get a string with the progress inside the bar.
h=findobj(handles.output.Children,'Tag','first_bar');
set(h.JavaPeer,'StringPainted',1)
I'm using a programmatic GUI in MATLAB which uses multiple figure windows. When I press the button 'Redraw' in Figure A, a new figure appears (Figure B) with some data plotted. I want the focus to immediately switch back to Figure A because there are many hotkeys (WindowKeyPressFcn) that I use in that window to update the plots in Figure B.
There are two problems here:
1) The last line of the callback for the button 'Redraw' does switch focus back to Figure A, BUT only if Figure B exists already. That is, the first time Figure B is created, it remains in focus. If I then use Figure A to update the plots in Figure B, the focus correctly switches back to Figure A. I can't think of why it behaves differently during the first redraw and all subsequent calls.
2) The even bigger issue is that if I set a breakpoint anywhere in the code and then resume execution, the focus switches back to Figure A as I want. So, why does entering the debugger and doing nothing else fix the problem? How can I find the issue if everything works in the debugger?
Thanks in advance!
EDIT: To my great surprise, I was able to reproduce this "Heisenbug" by writing my first ever programmatic GUI. This should be the simplest example of my problem. To see it in action, simply run the code below and click on the push button. For some reason, when Window 2 is created for the first time, the focus does NOT switch back to Window 1 as intended. It works properly for all subsequent button presses. Try closing Window 2 and pushing the button again, the error will keep occurring.
As mentioned in the original post, setting a breakpoint in the code resolves the issue. Set a breakpoint at line 27, then resume execution and Window 1 will be in focus.
What is happening here?
function heisenbug
%% Main problem:
% After clicking the push button, I want the focus to
% always switch back to Window 1 (the one containing the button).
% However, this does not work when Window 2 is first created.
%%
%% Create and then hide the GUI as it is being constructed
f = figure('Visible','off','name','Window 1','units','normalized','Position',[0.1 0.1 0.5 0.5]);
%% Initialize handles structure
handles = guihandles(f);
handles.window2 = [];
guidata(f,handles)
%% Make a button
hbutton = uicontrol('Style','pushbutton','String','Push me','units','normalized',...
'Position',[0.1 0.1 0.8 0.8],...
'Callback',#button_Callback);
%% Make the GUI visible
f.Visible = 'on';
%% Button callback
function button_Callback(source,eventData)
handles = guidata(gcbo);
% If Window 2 already exists, plot a circle, then switch focus back to Window 1.
if ~isempty(handles.window2) && ishandle(handles.window2)
figure(handles.window2);
plot(1,1,'bo')
figure(f);
% Otherwise, create Window 2 and do the same thing.
else
handles.window2 = figure('Name','Window 2','units','normalized','position',[0.4 0.1 0.5 0.5]);
plot(1,1,'bo')
figure(f)
end
guidata(source,handles)
end
end
My post was quickly answered by Adam (thanks!) on the MathWorks site: http://se.mathworks.com/matlabcentral/answers/299607-simply-entering-the-debugger-during-execution-of-matlab-gui-fixes-error-that-persists-during-normal.
I needed to insert a pause(0.05) after Window 2 is created, before trying to switch the focus back with figure(f). Otherwise the focus is stolen back to Window 2 when it finishes plotting.
I am new to Matlab so please bear with me.
So I created a two GUID GUI in which one generates a dynamic data and updates the plotting every second so I used pause(1) (which is continuous) and the second one takes the full data of the first GUI and plots it (opens on button press)
Is there a way where if I open the the second GUI the first GUI pauses and if and only if the second GUI is stopped the first GUI resumes its process?
Thanks in advance.
Update
Example:
gui1.m
function guie1()
for ii=1:100
c = magic(ii)
plot(c);
% a button at this point
% Some pause condition
drawnow;
end
so when I click on that button it would open a window (a new figure may be) so unless I close is the loop should be paused.
Here is the example:
run(fullfile(docroot,'techdoc','creating_guis','examples','callback_interrupt'));
Here is the link:
http://www.mathworks.com/help/matlab/creating_guis/callback-sequencing-and-interruption.html
Update:
Here:
http://blogs.mathworks.com/videos/2010/12/03/how-to-loop-until-a-button-is-pushed-in-matlab/
http://www.mathworks.com/matlabcentral/fileexchange/29618-spspj
I have a strange problem in my Matlab GUI. The GUI contains uipanel and icontrol objects, some of which are buttons. Usually, the GUI is controlled with the directional arrow keys.
However, once I click one of my buttons, the keyboard events are not recorded any more. I've set breakpoints in the keypress callback to find out what's happening and it turns out the callback is never called. If I manage to click the GUI background, it works once again, which makes me think it's related to the active control. But how can I give control back to the main window? uicontrol(hFigure) doesn't work, neither does figure(hFigure).
The following code snippet reproduces the problem. Copy it into a new file (ideally called test.m, otherwise Code Analyzer will complain) and run it to open a GUI window that shows this behaviour. Once the button is clicked, the arrow keys aren't recorded any more unless the user clicks the area outside the text uicontrol.
function test
figure('KeyPressFcn',#key)
clf
p = uipanel('position',[0 0 1 1],'BackgroundColor',[.7 .7 .7]);
uicontrol('Style','push','String','Click me','Units','norm',...
'Position',[0.43 0.91 0.14 0.06],'Callback',#button);
t = uicontrol(p,'Style','text','String','Use arrow keys','Units','norm',...
'Position',[0.2 0.4 0.6 0.2],'FontSize',20);
function button(~,~)
set(t,'String','Button pressed.');
end
function key(~,e)
set(t,'String',['Key ' e.Key ' pressed.']);
end
end
You are right about why this doesn't work. When you click on the button, the figure is no longer the active control. The best way to fix this is to additionally set the KeyPressFcn property of the button to be the same as the KeyPressFcn of the figure.
function test
figure('KeyPressFcn',#key)
clf
p = uipanel('position',[0 0 1 1],'BackgroundColor',[.7 .7 .7]);
uicontrol('Style','push','String','Click me','Units','norm',...
'Position',[0.43 0.91 0.14 0.06],'Callback',#button, ...
'KeyPressFcn', #key);
t = uicontrol(p,'Style','text','String','Use arrow keys','Units','norm',...
'Position',[0.2 0.4 0.6 0.2],'FontSize',20);
function button(~,~)
set(t,'String','Button pressed.');
end
function key(~,e)
set(t,'String',['Key ' e.Key ' pressed.']);
end
end
You could also set the WindowKeyPressFcn instead of KeyPressFcn.
For more information see my answer here:
matlab: difference between KeyPressFcn and WindowKeyPressFcn
I created a GUI in Matlab and one of the buttons the user supposed to press at the beginning has a while loop in it. I am taking frames one by one in this while loop. My problem is that I want the user to be able to pause this process (not to stop completely), so I added a pause button and I am changing a flag as this button is pressed. I need to put a code inside this matlab that will pause the loop procedure as pause button is pressed once, and will continue to the loop process when pause button is pressed again. I tried
if flag==1
pause on;
else
pause off
end;
But I saw that "pause on;" does not pause a while loop. Is there a function or method that I can use? In addition, I want other buttons to be able to work when code is in pause mode; for example another button displays some words, so when in pause mode, if this display words button is pressed, it must display the words on screen. I tried using "waitfor" but it stopped everything and this display button didn't work.
I would appreciate any kind of help.
You probably want to use MATLAB's WAITFOR function to do this.
I think this may be what you are looking for
while flag == 1
% Get/process your user input here
% Finish checking user input
pause(1) %Check every second, can of course be reduced
end