Zooming a Chart Object with the API

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How to Zoom a Chart Object Objects You Can Zoom Example of Zooming States in a Chart

How to Zoom a Chart Object

Use the Stateflow API method fitToView to zoom in on a graphical object in the chart. (See Using the API in the Stateflow API documentation for information about obtaining object handles.)

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Objects You Can Zoom

You can zoom the following chart objects:

• Charts

• Subcharts

• States

• Transitions

• Graphical functions

• Truth table functions

• MATLAB functions

• Simulink functions

• Connective junctions

• History junctions

• Boxes

• Notes

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Example of Zooming States in a Chart

Follow these steps to zoom in on different states:

1. At the MATLAB command prompt, type:

   old_sf_car;

   The chart shift_logic appears.

2. To define an object handle for the chart shift_logic, type:

   myChart = find(sfroot,'-isa','Stateflow.Chart','Name', ...
   'shift_logic');
   

3. To define an object handle for the state upshifting, type:

   myState = find(sfroot,'-isa','Stateflow.State','Name', ...
   'upshifting');
   

4. To zoom in on the state upshifting, type:

   myState.fitToView;

   The chart zooms in on the state and highlights it.

5. To define an object handle for the state downshifting, type:

   myState = find(sfroot,'-isa','Stateflow.State','Name', ...
   'downshifting');
   

6. To zoom in on the state downshifting, type:

   myState.fitToView;

   The chart zooms in on the state and highlights it.

7. To zoom out to the chart-level view, type:

   myChart.fitToView;

   The chart shift_logic reappears.

8. You can also zoom in on a state using the sfgco function. Follow these steps:

   1. Click any state in the chart.

   2. At the MATLAB command prompt, type:

      myState = sfgco;

      This command assigns the selected state to the object handle myState.

   3. To zoom in on the selected state, type:

      myState.fitToView;

      The chart zooms in on the state and highlights it.

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Copying Objects

Using the Editor Object

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