This repository is maintained by:

	@Nicogene

This repository contains a C++ library (librFSM) to load and execute rFSM LUA-based state machines and a graphical tools (rfsmGui) to create, debug and execute the state machine.

🎉 Compatible with Lua 5.1 and 5.2
🎉 Gui built with Qt
🎉 Multiplatform compatibilty(Linux, Windows, macOS)
🎉 User friendly, easy to install, easy to use
🎉 Few dependencies
🎉 Includes debugger for rFSM-based state machines
🎉 Includes builder for editing an existing state machine or build one from scratch

• Lua library (5.x)
• Qt 5
• Graphviz development library for rfsmGui
• rFSM (optional)

librFSM can be built with the built-in rfsm lua library (default is ON).

• Install one of the lua developemnt library (e.g., 5.1, 5.2, ...) and the graphviz development package
• If you do not want to use the built-in rfsm then follow the installation of rFSM on https://github.com/kmarkus/rFSM.

$ sudo apt-get install lua5.X-dev libgraphviz-dev \
                       qtbase5-dev qtdeclarative5-dev qtmultimedia5-dev 

• Compile and build

$ cd rfsmTools
$ mkdir build; cd build
$ cmake ../; make

Notice: if you do not want to to use the built-in rfsm you can disable cmake EMBED_RFSM flag:

$ cmake -DEMBED_RFSM=OFF ../; make

• Install lua for windows or download and build one of the lua library (e.g., 5.1, 5.2, ...)
• Download and Install Qt5 (https://www.qt.io/download/). Follow the the installation instruction to set the environemnt variables (Qt5_DIR and PATH).
• Install graphviz for windows and set/update the corresponding enviornment variables (GRAPHVIZ_ROOT and PATH):

 C:\> setx.exe Qt5_DIR <path to the qt installed directory>\qt5\5.X\msvc20XX\lib\cmake\Qt5
 C:\> setx.exe PATH "%PATH%;<path to the qt installed directory>\qt5\5.X\msvc2010\bin"
 C:\> setx.exe GRAPHVIZ_ROOT <path to the graphviz installed directory>
 C:\> setx.exe PATH "%PATH%;<path to the graphviz installed directory>\bin"

• The compilation is straightforward and uses the CMake build system. Get CMake for windows if you have not yet installed. Then simply run the Cmake and, set the project (rfsmTools) root folder and the desired build folder. Configure and generate project solution for your favorite IDE (e.g. Visual Studio 11). Then open the solution from your IDE and build the project.

• Update brew

$ brew update

• Install Lua

$ brew install lua

• Install Qt5

$ brew install qt
$ brew link --force qt

• Add the following lines to your .bash_profile

$ export Qt5_DIR=/usr/local/opt/qt5/lib/cmake
$ export PATH=/usr/local/opt/qt5/bin:$PATH

• Install Graphviz

$ brew install graphviz

now you can choose to compile using GNU Makefiles or Xcode:

• GNU Makefiles

$ cd rfsmTools
$ mkdir build; cd build
$ cmake ../; make

• Xcode

$ ccmake .. -G Xcode

This will generate .xcodeproj file which can be opened with Xcode. Build it by clicking Product -> Build or cmd+B shortcut. One can also compile the Release biaries by clicking Product -> Archive.

Alternatively, it is possible to directly compile the project on the command line by

$ xcodebuild [-configuration Debug|Release|Other Configs] [-target ALL_BUILD|install|Other Targets]

Toggle on the cmake flag USE_YARP to enable yarp features.

$ ./examples/rfsmTest ../examples/fsm/rfmodule_fsm.lua

Launch the rfsmGui. Open the example rFSM state machine from rfsmTools/examples/fsm/rfmodule_fsm.lua.

• Running: To execute the state machine, just press the Start from the Run menu. you can interfere the execution of the state machine by Pausing it or sending arbitrary events from Gui.

• Debuging: In the debug mode, you can step the state machine, send arbitrary events and etc. Debugging state machine using GUI also offer the dry-run mode. When an state machine executed in dry-run mode, none of the entry, doo or exit callbacks of a state are called! To debug the state machine, just press the Step or Run from the 'Debug' menu. Stepping the state machine, consumes an event from the event queue and performs the corresponding transition. Running it, will continue stepping until there is no event left in the event queue.

• Building: To build a new state machine simply press New rFSM, select the filename and then start creating your rFSM using the build toolbar on the left. Once you finish just press Save and your Lua code will be generated.

• Editing: You can edit a pre-existing state machine in two ways, directly from the embedded source editor and graphically through the rFSMGui. In the latter case it is possible to add/remove/rename states and transitions and pressing Save the code will be generated in one file preserving pre-definded entry, doo, exit functions and all the code defined before return rfsm.state{ statement. For now the "graphical editor" is enabled ONLY for those state machines that are defined in only one file. Later we will remove this limitation.

• First of all add in your CMakeLists.txt project: -find_package(rFSM) -target_link_libraries(${PROJECT_NAME} rFSM)

class MyStateCallback : public rfsm::StateCallback {
public:
    virtual void entry() {
        std::cout<<"entry() of MyState (hello from C++)"<<std::endl;
    }
} myStateCallback;

int main(int argc, char** argv) {
    rfsm::StateMachine rfsm;   
    rfsm.load("my-statemachine.lua")

    // setting some callbacks
    rfsm.setStateCallback("MyState", myStateCallback);    

    rfsm.sendEvent("event1");
    rfsm.step(1);    
    std::cout<<rfsm.getCurrentState();
    rfsm.sendEvents(2, "event1", "event2");
    rfsm.run()
    //...    
    return 0;
}

• Nicolò Genesio
• Ali Paikan
• Silvio Traversaro