3012
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// widget_slider.ysl2
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template "widget[@type='Slider']", mode="widget_class"
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class SliderWidget extends Widget{
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frequency = 5;
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range = undefined;
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fi = undefined;
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drag = false;
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enTimer = false;
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dispatch(value) {
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if(!this.drag){
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if(this.value_elt)
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this.value_elt.textContent = String(value);
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this.handle_position(value);
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}
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}
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handle_position(value){
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let [min,max,start,totallength] = this.range;
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let length = Math.max(0,Math.min(totallength,(Number(value)-min)*totallength/(max-min)));
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let tip = this.range_elt.getPointAtLength(length);
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this.handle_elt.setAttribute('transform',"translate("+(tip.x-start.x)+","+(tip.y-start.y)+")");
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}
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on_release(evt) {
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if(this.drag){
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this.drag = false;
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}
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}
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update_position(evt){
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if(this.drag && this.enTimer){
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var html_dist = 0;
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var svg_dist = 0;
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//calculate size of widget in html
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var range_borders = this.range_elt.getBoundingClientRect();
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var range_length = Math.sqrt( range_borders.height*range_borders.height + range_borders.width*range_borders.width );
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var [minX,minY,maxX,maxY] = [range_borders.left,range_borders.bottom,range_borders.right,range_borders.top];
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//get range and mouse coordinates
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var mouseX = undefined;
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var mouseY = undefined;
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if (evt.type.startsWith("touch")){
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mouseX = Math.ceil(evt.touches[0].clientX);
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mouseY = Math.ceil(evt.touches[0].clientY);
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}
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else{
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mouseX = evt.pageX;
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mouseY = evt.pageY;
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}
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//get handle distance from mouse position
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if (minX > mouseX && minY < mouseY){
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html_dist = 0;
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}
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else if (maxX < mouseX && maxY > mouseY){
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html_dist = range_length;
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}
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else{
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// calculate distace
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if(this.fi > 0.7){
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html_dist = (minY - mouseY)/Math.sin(this.fi);
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}
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else{
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html_dist = (mouseX - minX)/Math.cos(this.fi);
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}
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//check if in range
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if (html_dist > range_length){
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html_dist = range_length;
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}
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else if (html_dist < 0){
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html_dist = 0;
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}
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}
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//redraw handle
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this.handle_position(svg_dist=(html_dist/range_length)*this.range[1]);
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this.value_elt.textContent = String(Math.ceil(svg_dist));
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3018
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this.apply_hmi_value(0, Math.ceil(svg_dist));
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3012
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//reset timer
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this.enTimer = false;
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setTimeout("{hmi_widgets['"+this.element_id+"'].enTimer = true;}", 100);
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}
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}
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on_select(evt){
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this.drag = true;
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this.enTimer = true;
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this.update_position(evt);
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}
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init() {
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let min = this.min_elt ?
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Number(this.min_elt.textContent) :
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this.args.length >= 1 ? this.args[0] : 0;
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let max = this.max_elt ?
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Number(this.max_elt.textContent) :
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this.args.length >= 2 ? this.args[1] : 100;
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this.range = [min, max, this.range_elt.getPointAtLength(0),this.range_elt.getTotalLength()];
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let start = this.range_elt.getPointAtLength(0);
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let end = this.range_elt.getPointAtLength(this.range_elt.getTotalLength());
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this.fi = Math.atan2(start.y-end.y, end.x-start.x);
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this.handle_elt.addEventListener("touchstart", hmi_widgets[this.element_id].on_select.bind(this));
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this.handle_elt.addEventListener("mousedown", hmi_widgets[this.element_id].on_select.bind(this));
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this.element.addEventListener("mousedown", hmi_widgets[this.element_id].on_select.bind(this));
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window.addEventListener("touchmove", hmi_widgets[this.element_id].update_position.bind(this));
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window.addEventListener("mousemove", hmi_widgets[this.element_id].update_position.bind(this));
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window.addEventListener("mouseup", hmi_widgets[this.element_id].on_release.bind(this))
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window.addEventListener("touchend", hmi_widgets[this.element_id].on_release.bind(this));
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window.addEventListener("touchcancel", hmi_widgets[this.element_id].on_release.bind(this));
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}
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}
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template "widget[@type='Slider']", mode="widget_defs" {
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param "hmi_element";
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labels("handle range");
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optional_labels("value min max");
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|,
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3018
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}
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