笔者开源了一个Web思维导图mind-map,最近在优化背景图片效果的时候遇到了一个问题,页面上展示时背景图片是通过css使用background-image渲染的,而导出的时候实际上是绘制到canvas上导出的,那么就会有个问题,css的背景图片支持比较丰富的效果,比如通过background-size设置大小,通过background-position设置位置,通过background...
MindMup is a zero-friction mind map canvas. Our aim is to create the most productive mind mapping environment out there, removing all the distractions and providing powerful editing shortcuts.This git project is the server-side portion of MindMup. It provides a web interface that serves maps, ...
MindMup is a zero-friction mind map canvas. Our aim is to create the most productive mind mapping environment out there, removing all the distractions and providing powerful editing shortcuts.This git project is the server-side portion of MindMup. It provides a web interface that serves maps, ...
doAddHandler, fireEvent, getAttributeAsDoubleArray, getAttributeAsIntArray, getAttributeAsLong, getAttributeAsMap, getAttributeAsObject, getAttributeAsRecord, getAttributeAsStringArray, getAttributes, getHandlerCount, getJsObj, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttr...
While this increases flexibility, please keep in mind that status text should be short, direct, and preferably a single word. <StatusIndicator label="Slightly Longer Status" type={StatusIndicator.Type.Gray} maxWidth={250} />Tabs To avoid interference with the HTML name attribute, we're now ...
<canvas>元素用于生成图像。它本身就像一个画布,JavaScript 通过操作它的 API,在上面生成图像。它的底层是一个个像素,基本上<canvas>是一个可以用 JavaScript 操作的位图(bitmap)。 它与SVG 图像的区别在于,<canvas>是脚本调用各种方法生成图像,SVG 则是一个 XML...
All that remains is the real meat of this tutorial. The A* algorithm. Some of this is a bit daunting, but if you think of it as a game in itself, pathfinding algorithms can be great mind candy. There’s something really cool about being able to find your way out of a maze, escape...
Furthermore, Canvas also has a method to fill shapes with bitmap images (see Chapter 4). Setting Basic Fill Colors The Canvas fillStyle property is used to set a basic color for filling shapes on the canvas. We saw this earlier in the chapter when we used simple color names for our ...
In this month’s article, I’d like to take a step back from the glitz and complexity of canvas and show you some simple, basic uses of it, all with the goal of positioning the canvas as a powerful option for data visualization in your Web applications. With that in mind, I’ll foc...
Keep in mind that not all browsers currently support hardware acceleration, but those that don’t are quickly catching up.Canvas is only one small piece of the massive set of specifications that are HTML5, so before you use Canvas in your Web sites, make sure to check browser support for ...