ARX实现ZOOM功能

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1. // This is command 'ZOOMEXT, by Fenton Webb [Apr/17/2002], DevTech, Autodesk
2. void asdkzoomExt()
3. {
4. // get the extents of the drawing
5. AcDbViewTableRecord view;
6. AcGePoint3d max =
7. acdbHostApplicationServices()->workingDatabase()->extmax(),
8.        min = acdbHostApplicationServices()->workingDatabase()->extmin();
9. AcGePoint2d max采用2d (max[X], max[Y]);
10. AcGePoint2d min采用2d (min[X], min[Y]);
11. // now set the view centre point
12. view.setCenterPoint (min采用2d + (max采用2d - min采用2d) / 2.0);
13. // now height and width of view
14. view.setHeight(max采用2d[Y] - min采用2d[Y]);
15. view.setWidth (max采用2d[X] - min采用2d[X]);
16. // set the view
17. acedSetCurrentView (&view, NULL);
18. // updates the extents
19. acdbHostApplicationServices()->workingDatabase()->updateExt(TRUE);
20. }
21. ////////////////////////////////////////////////////////////////////////////
22. //
23. // This is command 'ZOOMWIN, by Fenton Webb [Apr/17/2002], DevTech, Autodesk
24. void asdkzoomWin()
25. {
26. AcGePoint3d max, min;
27. // get the window coords
28. int res = acedGetPoint (NULL, "/nPick zoom window pnt : ",
29. asDblArray(min));
30. // if ok
31. if (res == RTNORM)
32. {
33.   res = acedGetCorner (asDblArray(min), "/nPick other corner : ",
34. asDblArray(max));
35.   // get the extents of the drawing
36.   AcDbViewTableRecord view;
37.   AcGePoint2d max采用2d (max[X], max[Y]);
38.   AcGePoint2d min采用2d (min[X], min[Y]);
39.   // now set the view centre point
40.   view.setCenterPoint (min采用2d + (max采用2d - min采用2d) / 2.0);
41.   // now height and width of view
42.   view.setHeight(max采用2d[Y] - min采用2d[Y]);
43.   view.setWidth (max采用2d[X] - min采用2d[X]);
44.   // set the view
45.   acedSetCurrentView (&view, NULL);
46.   // updates the extents
47.   acdbHostApplicationServices()->workingDatabase()->updateExt(TRUE);
48. }
49. }

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