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_2d (max[X], max[Y]);
   
10. AcGePoint2d min_2d (min[X], min[Y]);
    
11. // now set the view centre point
    
12. view.setCenterPoint (min_2d + (max_2d - min_2d) / 2.0);
    
13. // now height and width of view
    
14. view.setHeight(max_2d[Y] - min_2d[Y]);
    
15. view.setWidth (max_2d[X] - min_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_2d (max[X], max[Y]);
    
38.   AcGePoint2d min_2d (min[X], min[Y]);
    
39.   // now set the view centre point
    
40.   view.setCenterPoint (min_2d + (max_2d - min_2d) / 2.0);
    
41.   // now height and width of view
    
42.   view.setHeight(max_2d[Y] - min_2d[Y]);
    
43.   view.setWidth (max_2d[X] - min_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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