HTML canvas strokeRect() 方法 Canvas 對象實例繪制 150*100 像素的矩形:YourbrowserdoesnotsupporttheHTML5canvastag.JavaScript:var c=document.getElementById("myCanvas");var ctx=c.getContext("2d");ctx.strokeRect(20,20,150,100);嘗試一下 ?瀏覽器支持Internet Explorer 9、Firefox...
http://www.o2fo.com/jsref/met-canvas-strokerect.htmlHTML canvas clearRect() 方法 Canvas 對象實例在給定矩形內(nèi)清空一個矩形:YourbrowserdoesnotsupporttheHTML5canvastag.JavaScript:var c=document.getElementById("myCanvas");var ctx=c.getContext("2d");ctx.fillStyle="red";ctx.fillRect(0,0,300,150);ctx.clearRect(20,20,100,50);嘗試一下...
http://www.o2fo.com/jsref/met-canvas-clearrect.htmlHTML canvas arc() 方法 Canvas 對象實例創(chuàng)建一個圓形:YourbrowserdoesnotsupporttheHTML5canvastag.JavaScript:var c=document.getElementById("myCanvas");var ctx=c.getContext("2d");ctx.beginPath();ctx.arc(100,75,50,0,2*Math.PI);ctx.stroke();嘗試一下 ?瀏覽器支持Internet Explorer 9...
http://www.o2fo.com/jsref/met-canvas-arc.htmlHTML canvas fill() 方法 Canvas 對象實例繪制 150*100 像素的矩形,然后用紅色來給它填色:YourbrowserdoesnotsupporttheHTML5canvastag.JavaScript:var c=document.getElementById("myCanvas");var ctx=c.getContext("2d");ctx.rect(20,20,150,100);ctx.fillStyle="red";ctx.fill();嘗試一...
http://www.o2fo.com/jsref/met-canvas-fill.htmlHTML canvas arcTo() 方法 Canvas 對象實例在畫布上創(chuàng)建介于兩個切線之間的?。篩ourbrowserdoesnotsupporttheHTML5canvastag.JavaScript:var c=document.getElementById("myCanvas");var ctx=c.getContext("2d");ctx.beginPath(); ctx.moveTo(20,20); // Create a starting pointctx.lin...
http://www.o2fo.com/jsref/met-canvas-arcto.htmlHTML canvas stroke() 方法 Canvas 對象實例繪制一條路徑,形狀是紅色的字母 L:YourbrowserdoesnotsupporttheHTML5canvastag.JavaScript:var c=document.getElementById("myCanvas");var ctx=c.getContext("2d");ctx.beginPath();ctx.moveTo(20,20);ctx.lineTo(20,100);ctx.lineTo(70,100);ctx.st...
http://www.o2fo.com/jsref/met-canvas-stroke.htmlHTML canvas isPointInPath() 方法 Canvas 對象實例如果點 20,50 位于當前路徑中,則繪制一個矩形:YourbrowserdoesnotsupporttheHTML5canvastag.JavaScript:var c=document.getElementById("myCanvas");var ctx=c.getContext("2d");ctx.rect(20,20,150,100);if (ctx.isPointInPath(20,50)) {...
http://www.o2fo.com/jsref/met-canvas-ispointinpath.htmlHTML canvas beginPath() 方法 Canvas 對象實例在畫布上繪制兩條路徑;綠色和紫色:YourbrowserdoesnotsupporttheHTML5canvastag.JavaScript:var c=document.getElementById("myCanvas");var ctx=c.getContext("2d");ctx.beginPath(); ctx.lineWidth="5";ctx.strokeStyle="green"; // Green pathc...
http://www.o2fo.com/jsref/met-canvas-beginpath.htmlHTML canvas measureText() 方法 Canvas 對象實例在畫布上輸出文本之前,檢查字體的寬度:YourbrowserdoesnotsupporttheHTML5canvastag.JavaScript:var c=document.getElementById("myCanvas");varctx=c.getContext("2d");ctx.font="30px Arial";var txt="Hello World"ctx.fillText("width:" + ...
http://www.o2fo.com/jsref/met-canvas-measuretext.htmlHTML canvas moveTo() 方法 Canvas 對象實例開始一條路徑,移動到位置 0,0。創(chuàng)建到達位置 300,150 的一條線:YourbrowserdoesnotsupporttheHTML5canvastag.JavaScript:var c=document.getElementById("myCanvas");var ctx=c.getContext("2d");ctx.beginPath();ctx.moveTo(0,0);ctx.lineTo(...
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HTML canvas strokeRect() 方法 Canvas 對象實例繪制 150*100 像素的矩形:YourbrowserdoesnotsupporttheHTML5canvastag.JavaScript:var c=document.getElementById("myCanvas");var ctx=c.getContext("2d");ctx.strokeRect(20,20,150,100);嘗試一下 ?瀏覽器支持Internet Explorer 9、Firefox...
http://www.o2fo.com/jsref/met-canvas-strokerect.htmlHTML canvas clearRect() 方法 Canvas 對象實例在給定矩形內(nèi)清空一個矩形:YourbrowserdoesnotsupporttheHTML5canvastag.JavaScript:var c=document.getElementById("myCanvas");var ctx=c.getContext("2d");ctx.fillStyle="red";ctx.fillRect(0,0,300,150);ctx.clearRect(20,20,100,50);嘗試一下...
http://www.o2fo.com/jsref/met-canvas-clearrect.htmlHTML canvas arc() 方法 Canvas 對象實例創(chuàng)建一個圓形:YourbrowserdoesnotsupporttheHTML5canvastag.JavaScript:var c=document.getElementById("myCanvas");var ctx=c.getContext("2d");ctx.beginPath();ctx.arc(100,75,50,0,2*Math.PI);ctx.stroke();嘗試一下 ?瀏覽器支持Internet Explorer 9...
http://www.o2fo.com/jsref/met-canvas-arc.htmlHTML canvas fill() 方法 Canvas 對象實例繪制 150*100 像素的矩形,然后用紅色來給它填色:YourbrowserdoesnotsupporttheHTML5canvastag.JavaScript:var c=document.getElementById("myCanvas");var ctx=c.getContext("2d");ctx.rect(20,20,150,100);ctx.fillStyle="red";ctx.fill();嘗試一...
http://www.o2fo.com/jsref/met-canvas-fill.htmlHTML canvas arcTo() 方法 Canvas 對象實例在畫布上創(chuàng)建介于兩個切線之間的?。篩ourbrowserdoesnotsupporttheHTML5canvastag.JavaScript:var c=document.getElementById("myCanvas");var ctx=c.getContext("2d");ctx.beginPath(); ctx.moveTo(20,20); // Create a starting pointctx.lin...
http://www.o2fo.com/jsref/met-canvas-arcto.htmlHTML canvas stroke() 方法 Canvas 對象實例繪制一條路徑,形狀是紅色的字母 L:YourbrowserdoesnotsupporttheHTML5canvastag.JavaScript:var c=document.getElementById("myCanvas");var ctx=c.getContext("2d");ctx.beginPath();ctx.moveTo(20,20);ctx.lineTo(20,100);ctx.lineTo(70,100);ctx.st...
http://www.o2fo.com/jsref/met-canvas-stroke.htmlHTML canvas isPointInPath() 方法 Canvas 對象實例如果點 20,50 位于當前路徑中,則繪制一個矩形:YourbrowserdoesnotsupporttheHTML5canvastag.JavaScript:var c=document.getElementById("myCanvas");var ctx=c.getContext("2d");ctx.rect(20,20,150,100);if (ctx.isPointInPath(20,50)) {...
http://www.o2fo.com/jsref/met-canvas-ispointinpath.htmlHTML canvas beginPath() 方法 Canvas 對象實例在畫布上繪制兩條路徑;綠色和紫色:YourbrowserdoesnotsupporttheHTML5canvastag.JavaScript:var c=document.getElementById("myCanvas");var ctx=c.getContext("2d");ctx.beginPath(); ctx.lineWidth="5";ctx.strokeStyle="green"; // Green pathc...
http://www.o2fo.com/jsref/met-canvas-beginpath.htmlHTML canvas measureText() 方法 Canvas 對象實例在畫布上輸出文本之前,檢查字體的寬度:YourbrowserdoesnotsupporttheHTML5canvastag.JavaScript:var c=document.getElementById("myCanvas");varctx=c.getContext("2d");ctx.font="30px Arial";var txt="Hello World"ctx.fillText("width:" + ...
http://www.o2fo.com/jsref/met-canvas-measuretext.htmlHTML canvas moveTo() 方法 Canvas 對象實例開始一條路徑,移動到位置 0,0。創(chuàng)建到達位置 300,150 的一條線:YourbrowserdoesnotsupporttheHTML5canvastag.JavaScript:var c=document.getElementById("myCanvas");var ctx=c.getContext("2d");ctx.beginPath();ctx.moveTo(0,0);ctx.lineTo(...
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