MATLAB: Do I receive a “Error using Stateflow.Clipboard/copy” when I try to update Stateflow library interfaces that contain graphical Stateflow functions that are set to “subchart” in R2017a+

stateflow

I am running a MATLAB script to update Stateflow library interfaces on a library that contains a graphical function set to be a "subchart". In this script, I create a "sfclipboard" object, grab the content from the current library, copy the content to the clipboard, and paste this to the new system that gets created by the script.

When I run the script on my library that contains a graphical function set to be a "subchart", I receive the following error message:

Error using Stateflow.Clipboard/copy

All objects must have the same subviewer

Error in update_library (line 168)

Clipboard.copy(AllObjects);

This seems like strange behavior since the subchart should be able to be copied without running into any issues through the clipboard object.

Best Answer

In MATLAB R2017a+, you can copy the content of the sub-charted graphical functions by setting the flag '-depth' to 1. This will copy a sub-charted function and its content all together. Please note that this solution works best if there is not a mix of sub-charted and non-sub-charted graphical functions and or states.

Please refer to the following lines of code below for an example of how to set this flag:

% Find the matching chart.  Get contents.
State = OldChart(iOldChart).find('-isa', 'Stateflow.State', '-depth', 1);
Transition = OldChart(iOldChart).find('-isa', 'Stateflow.Transition', '-depth', 1 );
Junction = OldChart(iOldChart).find('-isa', 'Stateflow.Junction', '-depth', 1);
Note = OldChart(iOldChart).find('-isa', 'Stateflow.Note', '-depth', 1);
Function = OldChart(iOldChart).find('-isa', 'Stateflow.Function', '-depth', 1);
Box = OldChart(iOldChart).find('-isa', 'Stateflow.Box', '-depth', 1);

Another alternative if there are some components that are not getting copied because they are in a different depth is to do the following:

% Find all objects
states = OldChart(iOldChart).find('-isa', 'Stateflow.State');
% Select the objects that are in the same subviewer
states = states(arrayfun(@(x)(x.Subviewer.Id == x.Chart.Id), states));

Then, you should be able to use the "sfclipboard" object to copy and paste the contents of the library.

Related Solutions

MATLAB: How can the handle to the currently visible Stateflow.Box object be obtained

The command returns an empty handle because the Stateflow.Box constructor does not have a 'Visible' method. Hence, it would not be possible to programmatically query the currently visible Box object similar to how a Chart object is queried.

There are two possible ways in which this can be achieved:

1. If you are interested in programmatically querying and obtaining a handle to a currently visible Stateflow Object (chart, box, state etc.), click on the object-of-interest* *and then *u*se the 'sfgco' command. Documentation here:

http://www.mathworks.com/help/stateflow/ref/sfgco.html

2. If you are already aware about the names of the objects to be queried, then it is possible to directly filter these objects out by using their names:

>> c = s.find('-isa', 'Stateflow.Chart', '-and', 'Name', 'chart_name');
>> b = s.find('-isa', 'Stateflow.Box', '-and', 'Name', 'box_name');

Using the 'Name' property would return the handles to the required objects directly.

MATLAB: Is there a function in Stateflow to determine how a particular “Data Store Memory” data object is being used by a Stateflow chart

The ability to determine how a particular "Data Store Memory" data object is used in a Stateflow chart is not available in Stateflow.

To work around this issue, you can write your own MATLAB file function that uses the Stateflow API to obtain the expressions in a transition, state, or other chart object that indicate how the "Data Store Memory" is being used. As an example, you might use the following commands in the Stateflow API to access expressions in a transition and state:

rt = sfroot;
m = rt.find('-isa', 'Simulink.BlockDiagram', '-and', 'Name','myModel');
chart = m.find('-isa','Stateflow.Chart','-and','Name','mychart');
trans = find(chart, '-isa','Stateflow.Transition'); %Get all transitions
states = find(chart, '-isa','Stateflow.State'); %Get all states
transString = trans(1).LabelString; %Get the expressions in the first transition
statesString = states(1).LabelString; %Get the expressions in the first state

One way to determine if the "Data Store Memory" data object is being read from or written to is to see if it is on the right or left side of an "=" sign. You can determine this by parsing the transString and statesString strings. You can also use the STRFIND command to get the location of the "Data Store Memory" variable and the "=" sign in the expressions contained in transString and statesString strings.

Best Answer

Related Solutions

MATLAB: How can the handle to the currently visible Stateflow.Box object be obtained

MATLAB: Is there a function in Stateflow to determine how a particular “Data Store Memory” data object is being used by a Stateflow chart

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