QPainterPath的一些相关问题

[qt_108]

QPainterPath elementAt（）可以获取到其中的某个元素，那么现在我有个问题，是否可以通过这个在drawPath的时候把其中的元素一点一点的绘制出来 来实现动画效果，如果可以的话请各位大神给出一些例子和相关代码


就比如我把一条曲线加进path中，我要动态实现这个曲线，那个具体是怎么实现

[qt_108]

没人吗

[赵4老师]

仅供参考： LineDDA The LineDDA function determines which pixels should be highlighted for a line defined by the specified starting and ending points. BOOL LineDDA( int nXStart, // x-coordinate of line's starting point int nYStart, // y-coordinate of line's starting point int nXEnd, // x-coordinate of line's ending point int nYEnd, // y-coordinate of line's ending point LINEDDAPROC lpLineFunc, // pointer to callback function LPARAM lpData // pointer to application-defined data ); Parameters nXStart Specifies the x-coordinate of the line's starting point. nYStart Specifies the y-coordinate of the line's starting point. nXEnd Specifies the x-coordinate of the line's ending point. nYEnd Specifies the y-coordinate of the line's ending point. lpLineFunc Pointer to an application-defined callback function. For more information, see the LineDDAProc callback function. lpData Pointer to the application-defined data. Return Values If the function succeeds, the return value is nonzero. If the function fails, the return value is zero. Windows NT: To get extended error information, callGetLastError. Remarks The LineDDA function passes the coordinates for each point along the line, except for the line's ending point, to the application-defined callback function. In addition to passing the coordinates of a point, this function passes any existing application-defined data. The coordinates passed to the callback function match pixels on a video display only if the default transformations and mapping modes are used. QuickInfo Windows NT: Requires version 3.1 or later. Windows: Requires Windows 95 or later. Windows CE: Unsupported. Header: Declared in wingdi.h. Import Library: Use gdi32.lib. See Also Lines and Curves Overview, Line and Curve Functions, LineDDAProc