SVGHMI: Fix browser side exception when some widget are not used, and are then discarded and not present in final SVG. In that case JS code was still making reference to discarded widget elements and was raising exception at init.
// widget_tooglebutton.ysl2
template "widget[@type='ToggleButton']", mode="widget_class"{
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class ToggleButtonWidget extends Widget{
frequency = 5;
state = 0;
active_style = undefined;
inactive_style = undefined;
dispatch(value) {
this.state = value;
//redraw toggle button
this.request_animate();
}
on_click(evt) {
//toggle state and apply
if (this.state) {
this.state = 0;
} else {
this.state = 1;
}
this.apply_hmi_value(0, this.state);
//redraw toggle button
this.request_animate();
}
animate(){
// redraw toggle button on screen refresh
if (this.state) {
this.active_elt.setAttribute("style", this.active_style);
this.inactive_elt.setAttribute("style", "display:none");
} else {
this.inactive_elt.setAttribute("style", this.inactive_style);
this.active_elt.setAttribute("style", "display:none");
}
}
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("onclick", "hmi_widgets['"+this.element_id+"'].on_click(evt)");
}
}
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}
template "widget[@type='ToggleButton']", mode="widget_defs" {
param "hmi_element";
optional_labels("active inactive");
|,
}