像图像一样拖放画布答案

【问题标题】：Drag and drop a canvas like an image像图像一样拖放画布
【发布时间】：2015-12-24 13:23:52
【问题描述】：

我们公司的网站使用canvas 元素在我们的页面上呈现图形和图表。但是，这些不能拖放到 Microsoft Word 文档或电子邮件客户端中。因此，我设计了一种方法，通过从画布中获取 base64 数据，在鼠标按下时将画布替换为外观相同的 img。

画布在 mousedown 时被正确替换为图像，并在 mouseup 时放回。但是，这不允许拖放图像标签，可能是因为替换发生得太晚了。

Here is a working JSFiddle example.

我们使用的插件还为图表的特定区域提供工具提示，因此我无法替换悬停/悬停时的元素，因为这会阻止工具提示工作。

如何使拖放图像本身成为可能？

【问题讨论】：

如果您的图表在渲染到画布后没有更改，您可以 (1) 创建内存画布以在应用程序开始时绘制图表，然后 (2) 创建 img 元素（来自 canvas.toDataURL）在屏幕上呈现。即使图表不是静态的，这也可能是保持拖动和工具提示不变的最接近的解决方案。

标签： javascript jquery html canvas

【解决方案1】：

在应用开始时预构建您的 img 元素，而不是花时间“即时”完成。

使用内存画布创建图表：

var canvas1=document.createElement('canvas');
// draw your chart on canvas1

然后从画布创建 img 元素

var chart1=new Image();
document.body.appendChild(chart1);
chart1.src=canvas1.toDataURL();

【讨论】：

我也走到了这一步，但问题是这使得工具提示不起作用。我需要特定领域的工具提示。如果图像地图可以做到这一点，那么这也是可能的。

【解决方案2】：

您的代码工作正常，但您无法将图像拖放到 word 上，因为 IMO 图像是 base64，如果您将图像拖放到浏览器中的新选项卡或添加 css @987654323，您会看到@或图片id

图片：

data:image/png;base64,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

如果你复制上面的base64代码并粘贴到浏览器地址栏中，它会渲染得很好，但是如果你在word中做同样的事情，它就不起作用了，所以你需要先对图像进行解码，然后再显示它鼠标向下

Base64 encoding and decoding in client-side Javascript

编辑：
您可以在画布上右键单击，然后将图像另存为，这样它将保存为图像文件

【讨论】：

好主意，但是如果我使用您提供的数据 URL 在页面上放置 img 元素，拖放图像似乎可以按预期工作。也许它不能在 Word 中工作，但它似乎在 Thunderbird 中工作，这是我主要需要它。问题似乎是浏览器试图在画布被图像替换之前“拖动”画布。
如果您从小提琴或浏览器在独立窗口中呈现的图像中拖放图像，并且 URL 中带有 bas64，它将显示相同的结果，这在东亚洲符号
但是，在 Thunderbird 中，如果您尝试插入图像 topmenu > insert > image，并在图像位置字段中粘贴此 base64 代码，则在图像预览框中您'会看到正确渲染的完全相同的图像，它会像它应该被插入一样
另一种选择是在画布上右击然后save image as，这样就会保存为图片文件
@Mi-Creativity。 IE & Edge 不将画布视为 img，因此您无法右键单击另存为。