Adding Activity to the Object Reactor Callback Functions
Adding the New Reactor Functionality
Handling Multiple Entity Types
The gp:command-ended editor reactor callback function is where most action takes place. Until this function is called, the garden path border polylines are “open for modify;” that is, users may still be manipulating the borders in AutoCAD. Within the reactor sequence, you have to wait until AutoCAD has done its part of the work before you are free to do what you want to do.
The following pseudo-code illustrates the logic of the gp:command-ended function:
Determine the condition of the polyline.
CONDITION 1 - POLYLINE ERASED (Erase command)
Erase the tiles.
CONDITION 2 - LOST ASSOCIATIVITY (Move, Rotate, etc.)
Erase the tiles.
CONDITION 3 - GRIP_STRETCH - REDRAW AND RE-TILE
Erase the tiles.
Get the current boundary data from the polyline.
If it is a lightweight polyline,
Process boundary data as 2D
Else
Process boundary data as 3D
End if
Redefine the polyline border (pass in parameters of the current
boundary configuration, as well as the old).
Get the new boundary information and put it into the format
required for setting back into the polyline entity.
Regenerate the polyline.
Redraw the tiles (force ActiveX drawing).
Put the revised boundary information back into the reactor
named in *reactorsToChange*.
End function
The pseudo-code is relatively straightforward, but there are several important details buried in the pseudo-code, and they are things you would not be expected to know at this point.