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qingping
- 当随机画了20条直线后,清屏重画;(提示:清屏就是用某种颜色画一块屏幕大小的矩形区域) -When the random drawing of 20 lines, the clear screen redraw (Hint: clear screen is painted with a color screen the size of a rectangular area)
ScreenCapture
- 一个用JAVA实现的屏幕抓图程序,可以抓取矩形区域,按照要求可以存储为JPEG,PNG等格式-Implementation of a screenshot with JAVA program that can capture rectangular area, in accordance with the requirements can be stored as JPEG, PNG and other formats
MouseTest
- 鼠标监听事件模拟,在一个目标区域画出标准矩形框,分别展现鼠标双击,单击,移动时生的事件。-Mouse listener event simulation, the target area to draw in a standard rectangular box, respectively, show the mouse double click, click, moving raw events.
html5canvasapi
- 基本知识 绘制矩形 清除矩形区域 圆弧 路径 绘制线段 绘制贝塞尔曲线 线性渐变 径向渐变(发散) 图形变形(平移、旋转、缩放) 矩阵变换(图形变形的机制) 图形组合 给图形绘制阴影 绘制图像(图片平铺、裁剪、像素处理[不只图像、包括其他绘制图形]) 绘制文字 保存和恢复状态(context) 保存文件 结合setInterval制作动画(basic knowledge Draw rectangle Clear rectangular area Arc