Runtime: Added PostStart methot to PLCObject, called after PLC is started, with all libraries and python object already created, and python extensions "Start" methods being called.
This is called before python thread processing py_eval blocks starts. Example purpose: attach additional ressource to web services
// widget_scrollbar.ysl2
template "widget[@type='ScrollBar']", mode="widget_class"{
||
class ScrollBarWidget extends Widget{
frequency = 10;
position = undefined;
range = undefined;
size = undefined;
mincursize = 0.1;
dispatch(value,oldval, index) {
switch(index) {
case 0:
this.range = Math.max(1,value);
break;
case 1:
this.position = value;
break;
case 2:
this.size = value;
break;
}
this.request_animate();
}
get_ratios() {
let range = this.range;
let size = Math.max(this.range * this.mincursize, Math.min(this.size, range));
let maxh = this.range_elt.height.baseVal.value;
let pixels = maxh;
let units = range;
return [size, maxh, range, pixels, units];
}
animate(){
if(this.position == undefined || this.range == undefined || this.size == undefined)
return;
let [size, maxh, range, pixels, units] = this.get_ratios();
let new_y = this.range_elt.y.baseVal.value + Math.round(Math.min(this.position,range-size) * pixels / units);
let new_height = Math.round(maxh * size/range);
this.cursor_elt.y.baseVal.value = new_y;
this.cursor_elt.height.baseVal.value = new_height;
}
init_mandatory() {
this.cursor_elt.onpointerdown = () => this.on_cursor_down();
this.bound_drag = this.drag.bind(this);
this.bound_drop = this.drop.bind(this);
}
apply_position(position){
this.position = Math.round(Math.max(Math.min(position, this.range - this.size), 0));
this.apply_hmi_value(1, this.position);
}
on_page_click(is_up){
this.apply_position(is_up ? this.position-this.size
: this.position+this.size);
}
on_cursor_down(e){
// get scrollbar -> root transform
let ctm = this.range_elt.getCTM();
// relative motion -> discard translation
ctm.e = 0;
ctm.f = 0;
// root -> scrollbar transform
this.invctm = ctm.inverse();
svg_root.addEventListener("pointerup", this.bound_drop, true);
svg_root.addEventListener("pointermove", this.bound_drag, true);
this.dragpos = this.position;
}
drop(e) {
svg_root.removeEventListener("pointerup", this.bound_drop, true);
svg_root.removeEventListener("pointermove", this.bound_drag, true);
}
drag(e) {
let [size, maxh, range, pixels, units] = this.get_ratios();
if(pixels == 0) return;
let point = new DOMPoint(e.movementX, e.movementY);
let movement = point.matrixTransform(this.invctm).y;
this.dragpos += movement * units / pixels;
this.apply_position(this.dragpos);
}
}
||
}
template "widget[@type='ScrollBar']", mode="widget_defs" {
param "hmi_element";
labels("cursor range");
const "pagebuttons" optional_labels("pageup pagedown");
const "have_pagebuttons","string-length($pagebuttons)>0";
value "$pagebuttons";
| init: function() {
| this.init_mandatory();
if "$have_pagebuttons" {
| this.pageup_elt.onclick = () => this.on_page_click(true);
| this.pagedown_elt.onclick = () => this.on_page_click(false);
}
| },
}