Hi Daniel,
According to my understanding, you want to design an interactive mask dialogue box specifically adding a "popup" or "combobox" when the user clicks a control button. Also, the user should be able to remove it.
I have attached a sample model in my answer that may serve as a starting point for your design. I have only focused on the visual part of your design and not the signal selection and plotting part.
The dialog box of the masked block of this model has two different axes option, each with "Add Another" and "Remove" buttons. Clicking on "Add another" displays a "popup" bar which provides the user to select one of the signals and "Remove" removes this bar. Coming to the callbacks for these buttons, I am not "adding" any popup bar when the user clicks "Add another" button because it is illegal to add parameters from a parameter callback function, instead, I have tried to find a workaround:
As you will be able to see in the "Parameters & Dialog" section of the mask edit dialogue box, I have already created everything that is needed: All the six popup bars that can be formed are created along with the "TypeOptions" they will contain. Only catch is that they will not be visible to the user when they first try to open the masked block. To do this I have pasted the following to the LoadFcn of the masked block:
p = Simulink.Mask.get(gcb);
for i = 1:numel(p.Parameters)
a = p.Parameters(i);
a.set('Visible','off'); %all the popup bars are invisible initially
end
Now, to control the flow of "Add button" and "Remove", I define two variables "axes1Counter" and "axes2Counter" which are defined in the base workspace when the model is loaded. I have initialized them as:
axes1Counter = 0;
axes2Counter = 3;
%In your case you will need 4, since you have 4 axes and say k input signals, then
%initialize as follows : axes1Counter = 0,axes2Counter = k,axes3Counter = 2*k,axes4Counter = 3*k;
The callbacks for "Add button" for Axes 1 section is:
v = evalin('base','axes1Counter'); %axes1Counter tracks the number of times User clicks of "Add" or "remove" buttons
if v >= 3
error("Cannot add more than 3 signals!")
end
evalin('base','axes1Counter = axes1Counter + 1'); %record the click
p = Simulink.Mask.get(gcb);
a = p.Parameters(v+1); %add the required parameter i.e. popup box
a.set('Visible','on');
And the callback for "Remove" button:
%Callback for Remove (for axes 1)
v = evalin('base','axes1Counter');
if v <= 0
error("Cannot remove any signal")
end
p = Simulink.Mask.get(gcb);
a = p.Parameters(v);
a.set('Visible','off');
evalin('base','axes1Counter = axes1Counter - 1');
Keep in mind that, these callbacks will be slightly different for each axes section. For example, check the call back for "Add another" in the Axes 2 section. We have:
if v >= 6 % Observe that it is 6 and not 3
error("Cannot add more than 3 signals!")
end
This is because we are essentialy looping through the parameter set of the mask, in my model, I have 6 parameters (since I have 3 input signals and 2 axes, so for each axes the user can add upto 3 signals), so you need to set this inequality according to which axes you are adding or removing popup bars from. Feel free to play around with the model I have attached and check the callbacks used. Also, have a look at this link.
Hope this helps!
