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diff --git a/files/zh-cn/web/api/canvasrenderingcontext2d/strokerect/index.html b/files/zh-cn/web/api/canvasrenderingcontext2d/strokerect/index.html new file mode 100644 index 0000000000..6cb5bf9f54 --- /dev/null +++ b/files/zh-cn/web/api/canvasrenderingcontext2d/strokerect/index.html @@ -0,0 +1,110 @@ +--- +title: CanvasRenderingContext2D.strokeRect() +slug: Web/API/CanvasRenderingContext2D/strokeRect +tags: + - API + - Canvas +translation_of: Web/API/CanvasRenderingContext2D/strokeRect +--- +<div>{{APIRef}}</div> + +<p><code><strong>CanvasRenderingContext2D</strong></code><strong><code>.strokeRect()</code></strong> 是 Canvas 2D API 在 canvas 中,使用当前的绘画样式,描绘一个起点在 <em>(x, y)</em> 、宽度为<em> w</em> 、高度为 <em>h</em> 的矩形的方法。</p> + +<p>此方法直接绘制到画布而不修改当前路径,因此任何后续{{domxref("CanvasRenderingContext2D.fill()", "fill()")}} 或{{domxref("CanvasRenderingContext2D.stroke()", "stroke()")}}调用对它没有影响。</p> + +<h2 id="语法">语法</h2> + +<pre class="syntaxbox">void <var><em>ctx</em>.strokeRect(x, y, width, height);</var> +</pre> + +<p><code>strokeRect()</code>方法绘制一个描边矩形,其起点为<code>(x, y)</code> ,其大小由宽度和高度指定。</p> + +<h3 id="参数">参数</h3> + +<dl> + <dt><code>x</code></dt> + <dd>矩形起点的 x 轴坐标。</dd> + <dt><code>y</code></dt> + <dd>矩形起点的 y 轴坐标。</dd> + <dt><code>width</code></dt> + <dd>矩形的宽度。正值在右侧,负值在左侧。</dd> + <dt><code>height</code></dt> + <dd>矩形的高度。正值在下,负值在上。</dd> +</dl> + +<h2 id="示例">示例</h2> + +<h3 id="一个简单的填充矩形">一个简单的填充矩形</h3> + +<p>这是一段使用 <code>strokeRect</code> 方法的简单的代码片段。</p> + +<h4 id="HTML">HTML</h4> + +<pre class="brush: html"><canvas id="canvas"></canvas> +</pre> + +<h4 id="JavaScript">JavaScript</h4> + +<p>矩形的左上角是(20,10)。它的宽度为160,高度为100。</p> + +<pre class="brush: js">const canvas = document.getElementById('canvas'); +const ctx = canvas.getContext('2d'); +ctx.strokeStyle = 'green'; +ctx.strokeRect(20, 10, 160, 100);</pre> + +<h4 id="结果">结果</h4> + +<p>{{ EmbedLiveSample('一个简单的填充矩形', 700, 180) }}</p> + +<h3 id="应用多种上下文设置">应用多种上下文设置</h3> + +<p>此示例绘制一个带有阴影和粗斜面轮廓的矩形。</p> + +<h4 id="HTML_2">HTML</h4> + +<pre class="brush: html"><code><canvas id="canvas"></canvas></code></pre> + +<h4 id="JavaScript_2">JavaScript</h4> + +<pre class="brush: js">const canvas = document.getElementById('canvas'); +const ctx = canvas.getContext('2d'); +ctx.shadowColor = '#d53'; +ctx.shadowBlur = 20; +ctx.lineJoin = 'bevel'; +ctx.lineWidth = 15; +ctx.strokeStyle = '#38f'; +ctx.strokeRect(30, 30, 160, 90);</pre> + +<h4 id="结果_2">结果</h4> + +<p>{{ EmbedLiveSample('应用多种上下文设置', 700, 180) }}</p> + +<h2 id="规范">规范</h2> + +<table class="standard-table"> + <tbody> + <tr> + <th scope="col">Specification</th> + <th scope="col">Status</th> + <th scope="col">Comment</th> + </tr> + <tr> + <td>{{SpecName('HTML WHATWG', "scripting.html#dom-context-2d-strokerect", "CanvasRenderingContext2D.strokeRect")}}</td> + <td>{{Spec2('HTML WHATWG')}}</td> + <td> </td> + </tr> + </tbody> +</table> + +<h2 id="浏览器兼容性">浏览器兼容性</h2> + +<p>{{Compat("api.CanvasRenderingContext2D.strokeRect")}}</p> + +<h2 id="参见">参见</h2> + +<ul> + <li>接口定义,{{domxref("CanvasRenderingContext2D")}}</li> + <li>{{domxref("CanvasRenderingContext2D.strokeStyle")}}</li> + <li>{{domxref("CanvasRenderingContext2D.clearRect()")}}</li> + <li>{{domxref("CanvasRenderingContext2D.fillRect()")}}</li> +</ul> |