main.d

// D-WebUI - Custom Web Server Example
//
// Start the bundled Python server first, it serves this folder on port 8080:
//
//     python simple_web_server.py
//
// then run this example.

import std.stdio : writeln;
import webui;

void main()
{
    auto win = newWindow();

    // An empty element name binds every event of the window
    win.bind("", &events);

    // Bind an HTML element with a D callable
    win.bind("my_backend_func", &myBackendFunc);

    // Set the web-server/WebSocket port WebUI should use, which makes
    // `webui.js` available at http://localhost:8081/webui.js
    win.setPort(8081);

    // Show the page served by the external web server
    win.show("http://localhost:8080/");

    // Wait until all windows get closed
    wait();

    // Free all memory resources (optional)
    clean();
}

void events(Event* e)
{
    switch (e.eventType)
    {
    case EventType.connected:
        writeln("Connected.");
        break;

    case EventType.disconnected:
        writeln("Disconnected.");
        break;

    case EventType.mouseClick:
        writeln("Click.");
        break;

    case EventType.navigation:
        {
            // Because this window binds "", WebUI blocks every `href` click and
            // sends it here instead, so links can be handled as needed.
            auto url = e.getString();
            writeln("Starting navigation to: ", url);
            e.window.navigate(url);
            break;
        }

    default:
        break;
    }
}

void myBackendFunc(long first, long second, long third)
{
    // JavaScript: my_backend_func(123, 456, 789);
    writeln("my_backend_func 1: ", first);
    writeln("my_backend_func 2: ", second);
    writeln("my_backend_func 3: ", third);
}