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Slider: add ability to limit drag area 

... of the sliders drag handler.
master
thyttan 2023-09-20 19:53:53 +02:00
parent 14dd20791f
commit 8e6b9c7308
1 changed files with 46 additions and 35 deletions
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81
modules/Slider.js
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@ -34,6 +34,7 @@ o.c = Object.assign({ // constants go here.
drawableSlider:true,
dragableSlider:true,
currLevel:undefined,
dragRect:R,
},conf);
let totalBorderSize = o.c.outerBorderSize + o.c.innerBorderSize;
@ -72,6 +73,11 @@ o.v.ebLast = 0;
o.v.dy = 0;
if (o.c.dragableSlider) {
o.f.wasOnDragRect = (exFirst, eyFirst)=>{
"ram";
return exFirst>o.c.dragRect.x && exFirst<o.c.dragRect.x2 && eyFirst>o.c.dragRect.y && eyFirst<o.c.dragRect.y2;
};
o.f.wasOnIndicator = (exFirst)=>{
"ram";
if (!o.c.horizontal) return exFirst>o.c._xStart-o.c.oversizeL*o.c._width && exFirst<o.c._xStart+o.c._width+o.c.oversizeR*o.c._width;
@ -80,42 +86,47 @@ if (o.c.dragableSlider) {
o.f.dragSlider = e=>{
"ram";
o.v.dragActive = true;
if (!o.c.propagateDrag) E.stopEventPropagation&&E.stopEventPropagation();
if (o.v.timeoutID) {clearTimeout(o.v.timeoutID); o.v.timeoutID = undefined;}
if (e.b==0 && !o.v.timeoutID && (o.c.timeout || o.c.timeout===0)) o.v.timeoutID = setTimeout(o.f.remove, 1000*o.c.timeout);
let input = Math.min(o.c.horizontal?175-e.x:e.y, 170);
input = Math.round(input/o.c.STEP_SIZE);
if (o.v.ebLast==0) exFirst = o.c.horizontal?e.y:e.x;
if (o.c.useMap && o.f.wasOnIndicator(exFirst)) { // If draging starts on the indicator, adjust one-to-one.
o.v.level = Math.min(Math.max(o.c.steps-input,0),o.c.steps);
if (o.v.level != o.v.prevLevel) cb("map",o.v.level);
o.f.draw&&o.f.draw(o.v.level);
} else if (o.c.useIncr) { // Heavily inspired by "updown" mode of setUI.
o.v.dy += o.c.horizontal?-e.dx:e.dy;
//if (!e.b) o.v.dy=0;
let incr;
while (Math.abs(o.v.dy)>32) {
if (o.v.dy>0) { o.v.dy-=32; incr = 1;}
else { o.v.dy+=32; incr = -1;}
Bangle.buzz(20);
o.v.level = Math.min(Math.max(o.v.level-incr,0),o.c.steps);
cb("incr",incr);
o.f.draw&&o.f.draw(o.v.level);
}
if (o.v.ebLast==0) {
exFirst = o.c.horizontal?e.y:e.x;
eyFirst = o.c.horizontal?e.x:e.y;
}
o.v.ebLast = e.b;
};
if (o.f.wasOnDragRect(exFirst, eyFirst)) {
o.v.dragActive = true;
if (!o.c.propagateDrag) E.stopEventPropagation&&E.stopEventPropagation();
if (o.v.timeoutID) {clearTimeout(o.v.timeoutID); o.v.timeoutID = undefined;}
if (e.b==0 && !o.v.timeoutID && (o.c.timeout || o.c.timeout===0)) o.v.timeoutID = setTimeout(o.f.remove, 1000*o.c.timeout);
let input = Math.min(o.c.horizontal?175-e.x:e.y, 170);
input = Math.round(input/o.c.STEP_SIZE);
if (o.c.useMap && o.f.wasOnIndicator(exFirst)) { // If draging starts on the indicator, adjust one-to-one.
o.v.level = Math.min(Math.max(o.c.steps-input,0),o.c.steps);
if (o.v.level != o.v.prevLevel) cb("map",o.v.level);
o.f.draw&&o.f.draw(o.v.level);
} else if (o.c.useIncr) { // Heavily inspired by "updown" mode of setUI.
o.v.dy += o.c.horizontal?-e.dx:e.dy;
//if (!e.b) o.v.dy=0;
let incr;
while (Math.abs(o.v.dy)>32) {
if (o.v.dy>0) { o.v.dy-=32; incr = 1;}
else { o.v.dy+=32; incr = -1;}
Bangle.buzz(20);
o.v.level = Math.min(Math.max(o.v.level-incr,0),o.c.steps);
cb("incr",incr);
o.f.draw&&o.f.draw(o.v.level);
}
}
o.v.ebLast = e.b;
};
}
o.f.remove = ()=> {
Bangle.removeListener('drag', o.f.dragSlider);