diff options
Diffstat (limited to 'files/zh-cn/web/api/canvasrenderingcontext2d/scrollpathintoview/index.html')
-rw-r--r-- | files/zh-cn/web/api/canvasrenderingcontext2d/scrollpathintoview/index.html | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/files/zh-cn/web/api/canvasrenderingcontext2d/scrollpathintoview/index.html b/files/zh-cn/web/api/canvasrenderingcontext2d/scrollpathintoview/index.html new file mode 100644 index 0000000000..222fb61aa0 --- /dev/null +++ b/files/zh-cn/web/api/canvasrenderingcontext2d/scrollpathintoview/index.html @@ -0,0 +1,172 @@ +--- +title: CanvasRenderingContext2D.scrollPathIntoView() +slug: Web/API/CanvasRenderingContext2D/scrollPathIntoView +translation_of: Web/API/CanvasRenderingContext2D/scrollPathIntoView +--- +<div>{{APIRef}} {{SeeCompatTable}}</div> + +<p><code><strong>CanvasRenderingContext2D</strong></code><strong><code>.scrollPathIntoView()</code></strong> 是 Canvas 2D API 将当前或给定的路径滚动到窗口的方法。类似于 {{domxref("Element.scrollIntoView()")}}。</p> + +<h2 id="语法">语法</h2> + +<pre class="syntaxbox">void <var><em>ctx</em>.scrollPathIntoView();<var> +void <var><em>ctx</em>.<var>scrollPathIntoView</var>(path);</var></var></var> +</pre> + +<h3 id="参数">参数</h3> + +<dl> + <dt><code>path</code></dt> + <dd>使用的{{domxref("Path2D")}} 路径。</dd> +</dl> + +<h2 id="示例">示例</h2> + +<h3 id="使用_scrollPathIntoView_方法">使用 scrollPathIntoView 方法</h3> + +<p>这是一段使用 <code>scrollPathIntoView</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> + +<pre class="brush: js; highlight:[6]">var canvas = document.getElementById("canvas"); +var ctx = canvas.getContext("2d"); + +ctx.beginPath(); +ctx.fillRect(10, 10, 30, 30); +ctx.scrollPathIntoView(); +</pre> + +<p>修改下面的代码并在线查看 canvas 的变化:</p> + +<div style="display: none;"> +<h6 id="Playable_code">Playable code</h6> + +<pre class="brush: html"><canvas id="canvas" width="400" height="200" class="playable-canvas"> +<input id="button" type="range" min="1" max="12"> +</canvas> +<div class="playable-buttons"> + <input id="edit" type="button" value="Edit" /> + <input id="reset" type="button" value="Reset" /> +</div> +<textarea id="code" class="playable-code"> +ctx.beginPath(); +ctx.rect(10, 10, 30, 30); +ctx.scrollPathIntoView();</textarea> +</pre> + +<pre class="brush: js">var canvas = document.getElementById("canvas"); +var ctx = canvas.getContext("2d"); +var textarea = document.getElementById("code"); +var reset = document.getElementById("reset"); +var edit = document.getElementById("edit"); +var code = textarea.value; + +function drawCanvas() { + ctx.clearRect(0, 0, canvas.width, canvas.height); + eval(textarea.value); +} + +reset.addEventListener("click", function() { + textarea.value = code; + drawCanvas(); +}); + +edit.addEventListener("click", function() { + textarea.focus(); +}) + +textarea.addEventListener("input", drawCanvas); +window.addEventListener("load", drawCanvas); +</pre> +</div> + +<p>{{ EmbedLiveSample('Playable_code', 700, 360) }}</p> + +<h2 id="规范描述">规范描述</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-scrollpathintoview", "CanvasRenderingContext2D.scrollPathIntoView")}}</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>{{CompatibilityTable}}</p> + +<div id="compat-desktop"> +<table class="compat-table"> + <tbody> + <tr> + <th>Feature</th> + <th>Chrome</th> + <th>Firefox (Gecko)</th> + <th>Internet Explorer</th> + <th>Opera</th> + <th>Safari</th> + </tr> + <tr> + <td>Basic support</td> + <td>{{CompatVersionUnknown}}[1]</td> + <td>{{CompatNo}}<br> + {{bug(1120401)}}</td> + <td>{{CompatNo}}</td> + <td>{{CompatVersionUnknown}}</td> + <td>{{CompatNo}}</td> + </tr> + </tbody> +</table> +</div> + +<div id="compat-mobile"> +<table class="compat-table"> + <tbody> + <tr> + <th>Feature</th> + <th>Android</th> + <th>Chrome for Android</th> + <th>Firefox Mobile (Gecko)</th> + <th>IE Mobile</th> + <th>Opera Mobile</th> + <th>Safari Mobile</th> + </tr> + <tr> + <td>Basic support</td> + <td>{{CompatVersionUnknown}}</td> + <td>{{CompatVersionUnknown}}</td> + <td>{{CompatNo}}<br> + {{bug(1120401)}}</td> + <td>{{CompatNo}}</td> + <td>{{CompatNo}}</td> + <td>{{CompatNo}}</td> + </tr> + </tbody> +</table> +</div> + +<h3 id="兼容性注解">兼容性注解</h3> + +<ul> + <li>[1] 这个特性受控于特性标识。 设置标识 <code>ExperimentalCanvasFeatures</code> 为 <code>true</code> 进行启用。</li> +</ul> + +<h2 id="参见">参见</h2> + +<ul> + <li>接口定义, {{domxref("CanvasRenderingContext2D")}}.</li> + <li>{{domxref("Element.scrollIntoView()")}}</li> +</ul> |