class button{
    attr widget
    attr on_trigger
    attr mouse_down

    def button(name, text, origin, size, on_trigger){
        this.widget := stage.create_actor()
        this.widget.set_origin(origin)
        this.widget.set_size(size)
        this.widget.add_model("button", origin, size, "green_button.json")

        var text_color := vec3(1.0f, 1.0f, 1.0f)
        this.widget.add_text(name, text, origin, text_color, 24, "ui_font.ttf")

        var trigger = on_trigger
        trigger() // triggers

        this.on_trigger := on_trigger // does not trigger with this.on_trigger = on_trigger either
        this.mouse_down = false

        on_trigger()      // triggers
        this.on_trigger() // this does not trigger

        this.widget.construct(fun(){}, fun(){}, fun[this](delta){this.logic(delta)})
    }

    def logic(delta){
        var current_camera := stage.get_scene("current").get_camera("current")
        var world_coordinates := current_camera.convert_screen_to_world(core.input.get_mouse_coordinates())

        var mouse_x = world_coordinates.x
        var mouse_y = world_coordinates.y

        var x = this.widget.get_origin().x
        var y = this.widget.get_origin().y

        var w = this.widget.get_size().x
        var h = this.widget.get_size().y

        if(mouse_x >= x - w / 2.0f && mouse_x <= x + w / 2.0f && mouse_y >= y - h / 2.0f && mouse_y <= y + h / 2.0f){

            if(core.input.is_key_down("mouse_left")){
                if(!this.mouse_down){
                    this.widget.get_model("button").change_animation("button_on")
                    this.mouse_down = true
                }

            } else {
                if(this.mouse_down){
                    this.widget.get_model("button").change_animation("button_off")
                    this.mouse_down = false
                    this.on_trigger()
                }
            }
        } else {
            this.mouse_down = false
            this.widget.get_model("button").change_animation("button_off")
        }

    }

    def get(){
        return this.widget
    }

}


return fun(name, text, origin, size, on_trigger){
    return button(name, text, origin, size, on_trigger)
}