// widget_button.ysl2

template "widget[@type='Button']", mode="widget_class"{
    ||
    class ButtonWidget extends Widget{
        frequency = 5;
        state = 0;
        active_style = undefined;
        inactive_style = undefined;

         on_mouse_down(evt) {
             if (this.active_style && this.inactive_style) {
                 this.active_elt.setAttribute("style", this.active_style);
                 this.inactive_elt.setAttribute("style", "display:none");
             }
             this.apply_hmi_value(0, 1);
         }

         on_mouse_up(evt) {
             if (this.active_style && this.inactive_style) {
                 this.active_elt.setAttribute("style", "display:none");
                 this.inactive_elt.setAttribute("style", this.inactive_style);
             }
             this.apply_hmi_value(0, 0);
         }

         init() {
            this.active_style = this.active_elt ? this.active_elt.style.cssText : undefined;
            this.inactive_style = this.inactive_elt ? this.inactive_elt.style.cssText : undefined;

            if (this.active_style && this.inactive_style) {
                this.active_elt.setAttribute("style", "display:none");
                this.inactive_elt.setAttribute("style", this.inactive_style);
            }

            this.element.setAttribute("onmousedown", "hmi_widgets["+this.element_id+"].on_mouse_down(evt)");
            this.element.setAttribute("onmouseup", "hmi_widgets["+this.element_id+"].on_mouse_up(evt)");
         }
    }
    ||
}


template "widget[@type='Button']", mode="widget_defs" {
    param "hmi_element";
    optional_labels("active inactive");
    |,
}