| 1.
| State Machine in a flowchart
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- A rectangular border is drawn around the sequence of statements that correspond to a state.
- One or more statements in a state can trigger a transition to another state. A transition is shown by drawing an arrow from that statement to the border of destination state.
- You can attach a comment or a note to a transition arrow.
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| 2.
| State Machines as a switch-case
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Often a state machine is coded in the form of a switch-case
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| Expanding and collapsing a switch
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- Double-click on a switch symbol to collapse the whole switch to a high-level symbol.
- Right-click on the high-level symbol, then click <Expand Symbol> in the pop-up menu. The switch will be fully expanded.
- Double-click on the high-level symbol to expand the switch by two levels
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| 3.
| Create a State Transition - process
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To create a State Transition Diagram:
- Enclose each state in a rectangular border
- Create a State Transition
- Change the routing of a State Transition
- Provide a comment to a State Transition
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| Enclose each state n a rectangular border
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To mark only a few cases as states :
- Right-click on the desired case symbol.
- Click : State Diagrams→Mark as State
In general, you can also right-click on a for, while, do, if symbol and mark the whole body as a state.
You can also mark all cases as a state in one go.
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| Create a State Transition
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- Identify statement which causes a transition to another state (trigger statement).
- Right-click in the trigger statement symbol, then click: State Diagrams→Create Transition.
- In the "Flowchart State Transition" dialog box, specify the resulting state.
- Then, provide a comment that will be attached to the transition arrow
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| Change the routing of a State Transition
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- Right-click on the symbol which contains the trigger statement.
- Click: State Diagrams→Transition Route
- In the "Flowchart Transition Route" dialog, change the "From" and "To" settings.
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| Provide a comment to a State Transition
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- Right-click in the symbol that contains the trigger statement.
- In the pop-up menu, click : State Diagrams→Add Comment to Transition
| 4.
| Modifying the comment in a State Transition
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- Right-click in the comment attached to the State Transition
- Click : State Diagrams→Transition Comment Properties
- Provide the new comment there!
| | 5.
| Display the State Transition with a desired detail level
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- Right-click on the switch symbol, then click: State Diagrams?Collapse All Cases.
- Double-click in the switch symbol to collapse the switch.
- Double-click in the high-level symbol. The switch is expanded to two-levels of detail.
- Double-click in the switch symbol to collapse the switch.
- Right-click in the switch symbol, then click Expand Symbol. You get a fully expanded State Transition Diagram.
| | 6.
| To save the State Transition Diagram
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To save the State Transition Diagram :
- Right-click anywhere in the flowchart window.
- In the pop-up menu, click: State Diagrams→Save & Close Flowchart.
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