| bindEvent(){ var that=this, canvas=this.canvas, ctx=this.ctx; this.canvas.addEventListener('mousemove',function(e){ var isLegend=false; // pos=WindowToCanvas(canvas,e.clientX,e.clientY); var box=canvas.getBoundingClientRect(); var pos = { x:e.clientX-box.left, y:e.clientY-box.top }; // 分组标签 for(var i=0,item,len=that.legend.length;i<len;i++){ item=that.legend[i]; ctx.save(); roundRect(ctx,item.x,item.y,item.w,item.h,item.r); // 因为缩小了一倍，所以坐标要*2 if(ctx.isPointInPath(pos.x*2,pos.y*2)){ canvas.style.cursor='pointer'; ctx.restore(); isLegend=true; break; } canvas.style.cursor='default'; ctx.restore(); } if(isLegend) return; //选择数据项 for(var i=0,item,len=that.animateArr.length;i<len;i++){ item=that.animateArr[i]; ctx.save(); ctx.fillStyle=item.color; ctx.beginPath(); ctx.rect(that.padding+item.x,that.H-that.padding-item.h,item.w,item.h); if(ctx.isPointInPath(pos.x*2,pos.y*2)){ //清空后再重新绘制透明度为0.5的图形 ctx.clearRect(that.padding+item.x,that.H-that.padding-item.h,item.w,item.h); ctx.globalAlpha=0.5; ctx.fill(); canvas.style.cursor='pointer'; that.showInfo(pos,item); ctx.restore(); break; } canvas.style.cursor='default'; that.tip.style.display='none'; ctx.globalAlpha=1; ctx.fill(); ctx.restore(); } },false); this.canvas.addEventListener('mousedown',function(e){ e.preventDefault(); var box=canvas.getBoundingClientRect(); var pos = { x:e.clientX-box.left, y:e.clientY-box.top }; for(var i=0,item,len=that.legend.length;i<len;i++){ item=that.legend[i]; roundRect(ctx,item.x,item.y,item.w,item.h,item.r); // 因为缩小了一倍，所以坐标要*2 if(ctx.isPointInPath(pos.x*2,pos.y*2)){ that.series[i].hide=!that.series[i].hide; that.animateArr.length=0; that.draw(); break; } } },false); } //显示数据 showInfo(pos,obj){ var txt=this.yAxis.formatter?this.yAxis.formatter.replace('{value}',obj.num):obj.num; var box=this.canvas.getBoundingClientRect(); var con=this.container.getBoundingClientRect(); this.tip.innerHTML = '<p>'+obj.name+':'+txt+'</p>'; this.tip.style.left=(pos.x+(box.left-con.left)+10)+'px'; this.tip.style.top=(pos.y+(box.top-con.top)+10)+'px'; this.tip.style.display='block'; } |
