SVGHMI: still quite naive path substitution whn prepearing widget for DnD, but now uses label generation.
Multiple widget DnD and mutiple variable still make no sense because all path are replaced with same path, but atleast min/max value are preserved...
// 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);
}
| },
}