![]() ![]() In actuality they are easier to program than dialog boxes both in the amount of code required and in the preparations needed when designing an application. Reactors are relatively easy to create and maintain-once they are understood. The reactors discussed here are available in the AutoCAD 2000 environment. Reactors keep an application up to speed on system events. To make an application aware of program events, use the tools in Visual LISP called reactors. So, you must make the application more aware of what goes on in between controlled operations. And if the required geometry is compromised, then the application may not operate. Of course, this practice can quickly come to involve sometimes complex and tricky coding. In more sophisticated cases, applications interrogate the geometry when they restart. But the application that runs over and over again or has multiple restart points needs to know what happens to the drawing in between restarts. ![]() At this point, the program has no way of knowing what the user does to the drawing. Or refer to the listings at the bottom of this page.Īpplication programs tend to be simple-minded once the program returns control to the AutoCAD user. Reactors-Making Aware Programs 31 Aug, 1999 By: Bill Kramer Get this code!. ![]()
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