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Classes | |
| class | IAttribute |
| This is the base abstract class for state and transition attributes. More... | |
| class | IAttributeContainer |
| This is the base abstract class for state and transition attribute containers. More... | |
| class | SCDataModel |
| class | SCState |
| The class represents a state in a state-chart Data-Model. More... | |
| class | SCTransition |
| The class represents a transition in a state-chart Data-Model. More... | |
| class | StateAttributes |
| class | TextBlock |
| The class represents a text-block in a state-chart Data-Model. More... | |
| class | StateIDTextBlockAttributes |
| class | TransitionAttributes |
Modules | |
| Attributes | |
Detailed Description
Elements of a state chart are states and state transitions. Each of these elements have attributes. In addition, states and transitions can have sub elements such as commentary text. Each sub element may have attributes.
Examples of attributes are a state's id/name, state type (initial, final, etc), a state's graphical position, size.
The data model holds a reference to the top-level state (class SCState). The top level state is also known as the state-machine. The top level state holds an attribute container for its attributes as well as a QList of substates and a QList of transitions which are sourced from that state.
Notes on State and Transition Identifiers
SCXML does not require a state have an id. But here we definitely need a consistent method of refering to a state. So 'name' is used as the definitive identifier for states in this model. When the model is saved back to an SCXML file, the name is pushed as the 'id' field. So all states in SCXML files produced by this program will end up with an id.
In SCXML, Transitions are identified by their target states with the 'target' attribute. In order to genericise attribute handling, this program identifies transitions with the 'name' key (same as for state identifiers). Thus internally, all states and transitions have 'name's. When saved back to an SCXML file, the transition name is written as the 'target' attribute.
