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Overwrite the outlineShape method

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and add the method getBorderWidth

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Modify the Propertysheets

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in org.yakindu.sct.ui.editor/src/org/yakindu/sct/ui/editor/propertysheets/StatePropertySection.java

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 by adding an Is Initial ComboBox and an Is Final ComboBox. The user may select the option true or false.

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After that, the State Properties View will look like this:

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Modify the State EditPart

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in org.yakindu.sct.ui.editor/src/org/yakindu/sct/ui/editor/editparts/StateEditPart.java

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 by adding the following code lines in the method handleNotificationEvent to update the border width or to add a double line border to the state, if the user changes the Is Initial or Is Final options.

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Remove the Initial and Final State Icon from the

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palette 

by removing them from the list of Elements situated in the file org.yakindu.sct.ui.editor/plugin.xml.

Modify the SGraphValidator

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in org.yakindu.sct.model.sgraph/src/org/yakindu/sct/model/sgraph/util/SGraphValidator.java

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Modify the creation wizard by modifying the method createStatechartModel in org.yakindu.sct.ui.editor/src/org/yakindu/sct/ui/editor/factories/FactoryUtils.java

The creation wizard creates a new diagram which includes an Initial State and a Normal State. We should modify the creation wizard by modifying the method createStatechartModel (org.yakindu.sct.ui.editor/src/org/yakindu/sct/ui/editor/factories/FactoryUtils.java)

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Clean the code where the old Initial and Final States are implemented (FinalStateFigure, InitialStateFigure, ...)