mirror of https://github.com/espruino/BangleApps
4 lines
1.9 KiB
JavaScript
4 lines
1.9 KiB
JavaScript
(function(){E.showScroller=function(c){function k(a){return a*c.h+b.y-l}function h(a){return Math.floor((a+l-b.y)/c.h)}if(!c)return Bangle.setUI();let p,e=0,m=0,w=setInterval(()=>{e*=.9},50),q=0,b=Bangle.appRect,n=0|c.scrollMin,r=c.h*c.c-b.h;r<n&&(r=n);const t=()=>{g.reset().clearRect(b).setClipRect(b.x,b.y,b.x2,b.y2);for(var a=h(b.y),d=Math.min(h(b.y2),c.c-1);a<=d;a++)c.draw(a,{x:b.x,y:k(a),w:b.w,h:c.h});g.setClipRect(0,0,g.getWidth()-1,g.getHeight()-1)},u=()=>{var a=e;f.scroll-a>r&&
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(a=f.scroll-r,e=0);f.scroll-a<n&&(a=f.scroll-n,e=0);f.scroll-=a;a=l;l=f.scroll&-2;a-=l;p=.01<Math.abs(e)?setTimeout(u,0):void 0;if(a){g.reset().setClipRect(b.x,b.y,b.x2,b.y2).scroll(0,a);if(0>a){a=Math.max(b.y2-(1-a),b.y);g.setClipRect(b.x,a,b.x2,b.y2);var d=h(a);for(a=k(d);a<b.y2;a+=c.h)c.draw(d,{x:b.x,y:a,w:b.w,h:c.h}),d++}else for(a=Math.min(b.y+a,b.y2),g.setClipRect(b.x,b.y,b.x2,a),d=h(a),k(d),a=k(d);a>b.y-c.h;a-=c.h)c.draw(d,{x:b.x,y:a,w:b.w,h:c.h}),d--;g.setClipRect(0,0,g.getWidth()-1,g.getHeight()-
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1)}};let v={mode:"custom",back:c.back,drag:a=>{if(0>e&&0<a.dy||0<e&&0>a.dy)e*=-1,m=5*e;0<a.b&&(q||(q=Date.now(),m=e=0),m+=a.dy);e=m/(Date.now()-q)*100;q&&0==a.b&&(q=m=0);e=E.clip(e,-100,100);lastDrag=Date.now();p||(p=setTimeout(u,0))},touch:(a,d)=>{if(!(d.y<b.y-4)&&(m=e=0,a=h(d.y),(0>n||0<=a)&&a<c.c)){let x=d.y+l-b.y-a*c.h;print("selected");c.select(a,{x:d.x,y:x})}},redraw:t};c.remove&&(v.remove=()=>{p&&clearTimeout(p);clearInterval(w);c.remove()});Bangle.setUI(v);let f={scroll:E.clip(0|c.scroll,
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n,r),draw:()=>{g.reset().clearRect(b).setClipRect(b.x,b.y,b.x2,b.y2);var a=h(b.y);let d=Math.min(h(b.y2),c.c-1);for(;a<=d;a++)c.draw(a,{x:b.x,y:k(a),w:b.w,h:c.h});g.setClipRect(0,0,g.getWidth()-1,g.getHeight()-1)},drawItem:a=>{let d=k(a);g.reset().setClipRect(b.x,Math.max(d,b.y),b.x2,Math.min(d+c.h,b.y2));c.draw(a,{x:b.x,y:d,w:b.w,h:c.h});g.setClipRect(0,0,g.getWidth()-1,g.getHeight()-1)},isActive:()=>Bangle.uiRedraw==t},l=f.scroll&-2;f.draw();g.flip();return f}})() |