Encapsulates a request as an object, thereby letting you parameterize other
objects with different requests, queue or log requests, and support undoable
operations.
Category:
Behavioral
UML Diagram:
Description of the Demonstration:
In this demonstration there are a number of different appliances (lights, stereo,
coffee pot, hot tub, security system, TV, and sprinkler system) each of which
needs to be controlled from an instance of RemoteControl. Each appliance
instantiates an "on" and an "off" Command which can handle all the required
actions for these features. All "on" and "off" commands are subclasses of
Command which defines the common interface with the function execute().
Commands for appliances are registered with RemoteControl which calls the
Command::execute function on the appropriate Command instance. It is also
then able to set the appropriate "undo" Command to counter the last executed
Command.
Code:
Click here to download a
zip file containing all the source files and an executable of the
Demonstration. See the _ReadMe.txt file in the zip.
