A Graphical Petri Nets Simulator - Rochester Institute of Technology
A Graphical Petri Nets Simulator - Rochester Institute of Technology
A Graphical Petri Nets Simulator - Rochester Institute of Technology
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Erasing a place<br />
Starting Conditions:<br />
The current editing mode is ERASE mode. The cursor is shaped like a<br />
pistol when located in user working area.<br />
Event :<br />
The user clicks the mouse button on one <strong>of</strong>the places <strong>of</strong>the net.<br />
Response :<br />
The main() calls read mouseO to get the current mouse location. It tests<br />
that location and finds out it is in the user working area, so it calls<br />
take action().<br />
The take actionO tests the current editing mode and finds it is ERASE<br />
mode.<br />
Take actionO calls sel segO to decide which instance in the plist is to be<br />
deleted.<br />
Take actionO calls the delete relateO to delete all the arcs related to the<br />
selected place from alist (the linked list <strong>of</strong> arcs).<br />
Take actionO calls erase icon() to delete the instance from the plist.<br />
Take actionO refresh the screen, causing<br />
related arcs disappear.<br />
-47-<br />
the selected place and its
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