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I am writing a Model Advisor check right now and I need to know the size of a subcharted Stateflow State or Box. But the "Stateflow.State" and "Stateflow.Box" objects only have a "Position" attribute, which gives their position inside their parent elements. I need to know the size of the subchart itself (where their contents reside). How can I get this size?

Sardar Usama
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walderich
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2 Answers2

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The "Position" attribute is the absolute position of "Stateflow.State" inside the Chart.Here is an example:

___________________
|AA               |
|___________      |
||BB       |      |
||_________|      |
-------------------

AA = r.find('-isa', 'Stateflow.State', 'Name', 'AA').Position

AA = 330.0924  542.7458  157.4576   94.6164

BB = r.find('-isa', 'Stateflow.State', 'Name', 'BB').Position

BB = 334.5304  571.1490  115.7404   62.6628
lililqth
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  • You're right. But what I need is the size of AA, if it is subcharted. Then BB's position is the absolute position inside the Stateflow.State AA and not the chart. And I then need the size (not necessarily the position) of AA as you have drawn it. – walderich Apr 04 '15 at 08:48
  • The attribute "Position" is consist of the coordinate of the upper - left corner , the width and height of the state. – lililqth Apr 05 '15 at 10:02
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I finally asked the MathWorks support for a solution and got this answer:

[...] there is currently no API functionality to retrieve the size of the subchart in the subchart subviewer. Unfortunately there are no workarounds to access this information currently.

Update: I recently learned about the undocumented sf API. It is possible to get information about the subchart with it. Therefore you need to get the ID of the State whos dimensions are needed. Here is an example:

r = sfroot;
s = r.find('-isa', 'Stateflow.State', '-and', 'IsSubchart', 1);
sf('get', s(1).id, '.subviewS.pos')

This does the following:

  1. Store the Simulink.Root object in r.
  2. Find all subcharted States and store them in s. You might need to refine the search to detect the exact State you need.
  3. Use the sf API to retrieve the position .pos of the first Subchart, which is represented by .subviewS

There is plenty of information about each of the Stateflow objects. To investigate further, you just need to find the appropriate object (using r.find()) and use sf('get', <object>.id). This lists all available information about the Stateflow object <object>.

walderich
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