SDK development kit download address:
https://www.mxdraw.com/ndetail_40248.html
1. improve the CAD online editing function
2. add addControlsEvent function.
3. Modify the problem that when converting large drawings under Linux, some of the drawings are not displayed when they are out of the current view range.
4. open drawings in CAD to increase multi-threaded support
5. modify the compilation and loading failure problem of the chip element program
6. modify the iconv on centos7 is not the right problem
7. increase the reference count judgment on the object, to prevent the object from being released, error crash
8. modify the old version of the dxf file, the text position is not correct.
