仿射变换
演示QPainter 中仿射变换的工作原理。
对使用QPainter 绘制的任何类型的图形均可进行变换。用于显示矢量图形、图像和文本的变换可通过以下方式进行调整：
- 拖动每个图形中央的红色圆圈，可将其移动到新位置。
- 拖动偏移后的红色圆圈，可使当前图形围绕中心圆旋转。旋转角度也可通过Rotate 的滑块进行控制。
- 缩放可通过“Scale ”滑块控制。
- 每个图形均可通过“Shear ”滑块进行剪切。
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