SimpleELpy 1.0.1

A lightweight event handling library for Python and C/C++.

Simple Event Library (SEL)

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The Simple Event Library (SEL) is a lightweight event handling library for Python >= 3.6 and C/C++. It provides a simple and efficient way to manage events and event handlers.

Current version: 1.0.0 (see res/common/ver.txt)

Installation

To install SEL, you can only git clone because the package is not available on PyPI:

git clone https://github.com/LuoWenhaoFromDangYang/Simple-Event-Library.git
cd Simple-Event-Library

And then run:

pip install .

Usage

Python

Use SEL on Python like this:

import SEL

def foo(*args):
    a = args[0]
    b = args[1]
    print(f"Received argument: {a:.2f} {b:.2f}")
    return

def main():
    print(f"SEL version: {SEL.SEL_PY}")
    SEL.Events.add_event("foo")
    SEL.Events.bind("foo", foo)
    SEL.Events.trigger("foo", 0.1, 0.2)
    return 0

if __name__ == "__main__":
    main()

C/C++

Or use SEL on C/C++ like this:

#include <stdio.h>
#include <stdarg.h>
#include "./SEL.h"

void foo(va_list args) {
    double a = va_arg(args, double);
    double b = va_arg(args, double);
    va_end(args);
    printf("Received argument: %.2lf %.2lf\n", a, b);
    return;
}

int main() {
    printf("SEL version: %s\n", SEL_C);
    int val;
    if(val = SEL_Init()) {
        printf("Failed to initialize SEL.(code %d)\n", val);
        printf("Please check your RAM usage and try again.\n");
        return 1;
    }
    printf("Successfully initialized SEL.\n");
    if(val = SEL_AddEvent("foo")) {
        printf("Failed to add event 'foo'.(code %d)\n", val);
        printf("Please check your RAM usage and try again.\n");
        return 1;
    }
    if(val = SEL_Bind("foo", foo)) {
        printf("Failed to bind function 'foo'.(code %d)\n", val);
        printf("Please check your RAM usage and try again.\n");
        return 1;
    }
    if(val = SEL_TriggerV("foo", 0.1, 0.2)) {
        printf("Failed to trigger event 'foo'.(code %d)\n", val);
        printf("Please check your RAM usage and try again.\n");
        return 1;
    }
    SEL_Free();
    printf("SEL freed.\n");
    return 0;
}

C++

And use SEL on C++ like this:

#include <iostream>
#include <cstdarg>
#include "./SEL.h"

void foo(va_list args) {
    double a = va_arg(args, double);
    double b = va_arg(args, double);
    va_end(args);
    std::cout << "Received argument: " << a << " " << b << std::endl;
    return;
}

int main() {
    std::cout << "SEL version: " << SEL_C << std::endl;
    SEL::Events events;
    int val;
    if(val = events.Init()) {
        std::cout << "Failed to initialize SEL.(code " << val << ")\n";
        std::cout << "Please check your RAM usage and try again.\n";
        return 1;
    }
    std::cout << "Successfully initialized SEL.\n";
    if(val = events.AddEvent("foo")) {
        std::cout << "Failed to add event 'foo'.(code " << val << ")\n";
        std::cout << "Please check your RAM usage and try again.\n";
        return 1;
    }
    if(val = events.Bind("foo", foo)) {
        std::cout << "Failed to bind function 'foo'.(code " << val << ")\n";
        std::cout << "Please check your RAM usage and try again.\n";
        return 1;
    }
    if(val = events.Trigger("foo", 0.1, 0.2)) {
        std::cout << "Failed to trigger event 'foo'.(code " << val << ")\n";
        std::cout << "Please check your RAM usage and try again.\n";
        return 1;
    }
    events.Free();
    std::cout << "SEL freed.\n";
    return 0;
}

Initialization

To initialize SEL, you can use functions like these:

• In Python, SEL initializes automatically when imported.
• In it's C/C++, you need to call SEL_Init() manually.
• In it's C++, you need to create a SEL::Events object and call events.Init() manually. These function returns an integer value indicating the success or failure of the initialization. If the initialization is successful, the function returns 0. If the initialization fails, the function returns a non-zero value.

Compiling C/C++ programs

Compile with:

gcc -o my_program my_program.c ./res/c/main.c

Or:

g++ -o my_program my_program.cpp ./res/c/main.c

License

MIT License

Contributing

Feel free to open issues or pull requests on GitHub.