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<!DOCTYPE HTML>
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<h1><a href="/">Vanery's blog</a></h1>
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<time datetime="2014-02-19T02:03:03.000Z"><a href="/2014/02/19/drag/">2月 19 2014</a></time>
<h1 class="title"><a href="/2014/02/19/drag/"></a></h1>
</header>
<div class="entry">
<h2 id="1-">1.拖拽</h2>
<p>一直说热爱前端，又一直这么懒。想了想是应该写些东西了。</p>
<p>虽然每个人的需求不同，但需要解决的问题却是不尽相同的：</p>
<ul>
<li>拖拽（自定义或默认）</li>
<li>内容（自定义或默认）</li>
<li>动画（自定义或默认）</li>
<li>定位（自定义或默认) </li>
</ul>
<hr>
<h3 id="1-1-">1.1拖拽的事件类型：</h3>
<ul>
<li>drag</li>
<li>dragStart</li>
<li>dragEnd </li>
</ul>
<p><strong>说这个之前先发下事件模型</strong>：</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre>1
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</pre></td><td class="code"><pre><span class="keyword">var</span> EventDisp = <span class="function"><span class="keyword">function</span><span class="params">()</span> {</span>
<span class="keyword">this</span>.events = {};
}
<span class="keyword">var</span> EventDisp = {};
EventDisp.events = [];
EventDisp.on = <span class="function"><span class="keyword">function</span><span class="params">(ev, fn)</span> {</span>
<span class="comment">//</span>
};
EventDisp.trigger = <span class="function"><span class="keyword">function</span><span class="params">(ev)</span> {</span>
<span class="comment">//</span>
};
EventDisp.off = <span class="function"><span class="keyword">function</span><span class="params">(ev)</span> {</span>
<span class="comment">//</span>
};
EventDisp.addEvent = <span class="function"><span class="keyword">function</span><span class="params">(elem, etype, fn)</span> {</span>
<span class="comment">//</span>
},
EventDisp.removeEvent = <span class="function"><span class="keyword">function</span><span class="params">(elem, etype, fn)</span> {</span>
<span class="comment">//</span>
};
</pre></td></tr></table></figure>
<p><strong>drag事件</strong>拖拽过程中持续触发的事件，类似于 mousemove： </p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre>1
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</pre></td><td class="code"><pre>EventDisp.on(elem, <span class="string">"drag"</span>, <span class="function"><span class="keyword">function</span> <span class="params">(ev)</span> {</span>
<span class="comment">//ev.drag、ev.target 拖拽元素本身。</span>
<span class="comment">//ev.pageX 鼠标指针的 X 轴坐标</span>
<span class="comment">//ev.pageY 鼠标指针的 Y 轴坐标</span>
});
</pre></td></tr></table></figure>
<p><strong>dragStart事件</strong>拖拽开始时触发的事件，类似于 mousedown 。</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre>1
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</pre></td><td class="code"><pre>EventDisp.on(elem, <span class="string">"dragStart"</span>, <span class="function"><span class="keyword">function</span> <span class="params">(ev)</span> {</span>
<span class="comment">//ev.drag 拖拽元素本身。</span>
<span class="comment">//ev.target 触发拖拽的元素。</span>
});
</pre></td></tr></table></figure>
<p><strong>dragEnd事件</strong>拖拽结束后触发的事件，类似于 mouseup。 </p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre>1
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</pre></td><td class="code"><pre>EventDisp.on(elem, <span class="string">"dragEnd"</span>, <span class="function"><span class="keyword">function</span> <span class="params">(ev)</span> {</span>
<span class="comment">//ev.drag 拖拽元素本身。</span>
<span class="comment">//ev.target 触发拖拽的元素。</span>
});
</pre></td></tr></table></figure>
<h3 id="2-drag-">2.drag默认参数</h3>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre>1
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</pre></td><td class="code"><pre><span class="comment">/**
* @param target { Object } 拖拽对象
* @param options.axis { String } 拖拽方向
* @param options.container { Object } 拖拽容易
* @param options.handle { String } 指定区域
* @param options.proxy { Boolean } 拖拽代理
* @param options.refresh { Boolean } 更新拖拽
*/</span>
<span class="keyword">var</span> dragO = <span class="keyword">new</span> Drag(target, options);
</pre></td></tr></table></figure>
<p><em>下回继续</em></p>
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<a href="/tags/javascript, drag, dialog/" style="font-size: NaNpx;">javascript, drag, dialog</a>
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