相关疑难解决方法(0)

是否有基于jQuery的360度旋转滑块,用户可以抓住它并将其旋转360度？

如何将鼠标滑动到圆形？在画布中绘制圆弧和鼠标指针.鼠标应该在圆形路径上拖拽山墙？

//function to create mouse event to drag the mouse hover the arc

function mousedrag() {
    var canvasoffset = $(this.canvas).offset();
    var offsetX = canvasoffset.left;
    var offsetY = canvasoffset.top;     
    var mouseX = parseInt(e.offsetX || e.clientX - offsetX);
    var mouseY = parseInt(e.offsetY || e.clientY - offsetY);

    var radius = this.width / 2;
    var twoPI = 2 * Math.PI;
    var toRad =  twoPI / 360;
    var r_width =  this.width * 0.8;

    var radial_Angle = Math.atan2(mouseY - radius,mouseX - radius);

    var p_side_x =  radius …