@leafer-in/scroll
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JavaScript
this.LeaferIN=this.LeaferIN||{},this.LeaferIN.scroll=function(t,i){"use strict";class s extends i.Group{get isOutside(){return!0}constructor(t,s){super(),this.config={theme:"light",padding:0,minSize:10},t.isApp&&(t.sky.add(this),t=t.tree),this.target=t,s&&i.DataHelper.assign(this.config,s),this.changeTheme(this.config.theme),this.waitLeafer(this.__listenEvents,this)}changeTheme(t){let s;i.isString(t)?(s={fill:"black",stroke:"rgba(255,255,255,0.8)"},"dark"===t&&(s.fill="white",s.stroke="rgba(0,0,0,0.2)")):s=t,this.scrollXBar||this.addMany(this.scrollXBar=new i.Box,this.scrollYBar=new i.Box),s=Object.assign({strokeAlign:"center",opacity:.5,width:6,cornerRadius:3,hoverStyle:{opacity:.6},pressStyle:{opacity:.7}},s),s.height||(s.height=s.width),this.scrollXBar.set(Object.assign(Object.assign({},s),{visible:!1})),this.scrollYBar.set(Object.assign(Object.assign({},s),{visible:!1})),this.leafer&&this.update()}update(t){if(this.dragScrolling)return;const{minSize:s,padding:e}=this.config,{zoomLayer:r,canvas:h}=this.target.leafer,{worldRenderBounds:a}=r;if(t&&this.scrollBounds&&this.scrollBounds.isSame(a))return;this.scrollBounds=new i.Bounds(a);const n=h.bounds.clone().shrink(e),o=n.clone().add(a),l=this.ratioX=n.width/o.width,g=this.ratioY=n.height/o.height,d=(n.x-o.x)/o.width,c=(n.y-o.y)/o.height,u=l<1,v=g<1,{scrollXBar:f,scrollYBar:_}=this,{x:p,y:m,width:y,height:B}=n.shrink([2,v?_.width+6:2,u?f.height+6:2,2]);f.set({x:p+y*d,y:m+B+2,width:Math.max(y*l,s),visible:u}),_.set({x:p+y+2,y:m+B*c,height:Math.max(B*g,s),visible:v})}onDrag(t){this.dragScrolling=!0,this.__dragOut=this.app.config.move.dragOut,this.app.config.move.dragOut=!1;const i=t.current===this.scrollXBar,s=this.target.leafer.getValidMove(i?-t.moveX/this.ratioX:0,i?0:-t.moveY/this.ratioY);this.target.moveWorld(s.x,s.y),t.current.moveWorld(s.x&&-s.x*this.ratioX,s.y&&-s.y*this.ratioY)}onDragEnd(){this.dragScrolling=!1,this.app.config.move.dragOut=this.__dragOut}__listenEvents(){const{scrollXBar:t,scrollYBar:s}=this;this.__eventIds=[t.on_(i.DragEvent.DRAG,this.onDrag,this),s.on_(i.DragEvent.DRAG,this.onDrag,this),t.on_(i.DragEvent.END,this.onDragEnd,this),s.on_(i.DragEvent.END,this.onDragEnd,this),this.target.on_(i.RenderEvent.BEFORE,()=>this.update(!0)),this.target.leafer.on_(i.ResizeEvent.RESIZE,()=>this.update())]}__removeListenEvents(){this.off_(this.__eventIds)}destroy(){this.destroyed||(this.__removeListenEvents(),this.target=this.config=null,super.destroy())}}return i.Plugin.add("scroll"),t.ScrollBar=s,t}({},LeaferUI);
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