oCanvas - 简化HTML5 Canvas的使用的JavaScript框架
fmms
12年前
oCanvas是一个JavaScript框架，用于简化HTML5 Canvas标签的使用。可以利用对象来代替像素。
oCanvas 可以帮助你很容易的在 HTML5 的 Canvas 标签上创建对象，并且创建这些对象的动画。
可以利用oCanvas做很多事件，比如创建图表等。
var canvas = oCanvas.create({ canvas: "#canvas", background: "#222", fps: 60 }); var data = [25, 65, 10]; var prototype = canvas.display.arc({ x: canvas.width / 2, y: canvas.height / 2, radius: 75, strokeWidth: 150 }); var pieces = [], end, lastEnd; for (var i = 0; i < data.length; i++) { end = (i > 0 ? lastEnd : 0) + 360 / (100 / data[i]) - (i < 1 ? 90 : 0); pieces.push(prototype.clone({ start: (i < 1 ? -90 : lastEnd), end: end, strokeColor: "hsl(195, "+ (100 - i*10) +"%, "+ (50 - i*10) +"%)" })); canvas.addChild(pieces[i]); lastEnd = end; pieces[i]._start = pieces[i].start; pieces[i]._end = pieces[i].end; pieces[i].bind("mouseenter touchenter", function () { this.radius = 77; this.strokeWidth = 154; canvas.redraw(); }).bind("mouseleave touchleave", function () { this.radius = 75; this.strokeWidth = 150; canvas.redraw(); }).bind("click tap", function () { for (var i = 0; i < pieces.length; i++) { pieces[i].animate({ start: 0, end: 0, opacity: 0 }, 500, function () { this.animate({ start: this._start, end: this._end, opacity: 1 }, 500); }); } }); }