Passing Arguments to a UIMenu selected Function

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Jason
Jason on 28 Jan 2022
Commented: s pernot on 29 Jan 2022
Hello, I am creating a uimenu option on a figure that contains plots so I can scale the ylimits as I wish (i.e. force min ylim to be zero)
My plots are on axes componentns such as:
figure
ax1=subplot(1,2,1);
ax2=subplot(1,2,2);
plot(ax1,data(:,1),data(:,3),'*-','Linewidth',1'); grid(ax1,'on');
plot(ax2,data(:,1),data(:,4),'*-','Linewidth',1'); grid(ax2,'on');
app.myax2=ax2; % Assign required axes, ax2, the the app property myax2 (so to be visible in an functions)
And I create the uimenu like this:
m=uimenu('Text','YLim Options');
mitem1=uimenu(m,'Text','YLim Zero');
mitem1.MenuSelectedFcn = @app.YlimZero
where the function YlimZero is:
function YlimZero(app, ~, ~)
ax=app.myax2;
ylim(ax,[0,inf])
end
The way I decide which axes to apply to is to define myax1, myax2 etc as app properties and access them directly in the function. However, to be generic, I want to be able to apply all this to any figure with any number of plots (and axes components, ax) - so my question is, is there a way to pass the axes I want to apply to in the menu selected function, mitem1.MenuSelectedFcn = @app.YlimAuto
(sometimes I want to apply it for example to ax1 and ax3 only and leave ax2 alone)
Thanks
Jason

Accepted Answer

Jason
Jason on 29 Jan 2022
I think I have a solution, I can pass which ever axes (or number of axes) to myax as follows
app.myax(1)=ax1;
app.myax(2)=ax2;
myax is a public property of my app.
Then in the YlimZero function
function YlimZero(app, ~, ~)
n=numel(app.myax); % Determin how many axes have been passed
for i=1:n
ylim(app.myax(i),[0,inf]) % Adjust the Axes as required
end
end
  1 Comment
s pernot
s pernot on 29 Jan 2022
god bless you.
Now you realize you are great at helping yourself
congratulations

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More Answers (2)

s pernot
s pernot on 28 Jan 2022
hi jason
you have several options - see y. altman undocumented site for further details
here are my preferred way to solve this by decreasing preference order
  1. create in the main function a handle struct where you attach all requires axes handles like
handles = struct;
handles.ax1 = AxesHdl1;
handles.ax2= AxesHdl2;
% you then pass this handle structure as an argument of your YlimZero callback like
mitem1.MenuSelectedFcn = {@app.YlimZero, handles};
% then beware of the definition of your callback : it should be something like
function YlimZero(hObject, event, handles)
% hObject = handle to uimenu object
% event = event message if you want to use it (or not)
% then your handles struct
% do something .... like
ylim(handles.ax1,[0,inf])
end
2 instead of passing handle struct in argument of callback, you store it and attach it to you uimenu object in the main func
like :
setappdata(mitem1, 'handles', handles);
mitem1.MenuSelectedFcn = @app.YlimZero;
%then in you callback function
function YlimZero(app, hObject, event)
handles = getappdata(hObject, 'handles');
ylim(handles.ax1,[0,inf])
end
3. less nice : you attach handle struct to mitems UserData like :
mitem1.UserData.handles = handles;
% and so on
now go to your code, old chap
best regards
Stephane
  1 Comment
Jason
Jason on 28 Jan 2022
Hi, thanks for your fast reply. I think your solution is for GUIDE as its using handles and appdata. Im using appdesigner so they won't work.

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s pernot
s pernot on 28 Jan 2022
it also works similaly with appdesigner...
in the latter case, you can simply attach handle struct as a app property
you declare it like in the app class
properties
handles
end
% in the startupFcn
app.handles = struct;
app.handles.ax1 = AxesHdl1;
app.handles.ax2= AxesHdl2;
% and you simply use :
mitem1.MenuSelectedFcn = @app.YlimZero
function YlimZero(app, hObject, event)
% hObject = handle to uimenu object
% event = event message if you want to use it (or not)
% then your handles struct
% do something .... like
ylim(app.handles.ax1,[0,inf])
end
% that's it
  2 Comments
s pernot
s pernot on 29 Jan 2022
sorry for this, i am not in your head... you have to be creative
that is your own job now to achieve this... the is the real work before coding
to imagine how to make a suitable design...
Good luck

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