New example

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk/SWIG@775 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Examples/python/class/example.py

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+# file: example.py
+
+# This file illustrates the low-level C++ interface
+# created by SWIG.  In this case, all of our C++ classes
+# get converted into function calls.
+
+import example 
+
+# ----- Object creation -----
+
+print "Creating some objects:"
+c = example.new_Circle(10)
+print "    Created circle", c
+s = example.new_Square(10)
+print "    Created square", s
+
+# ----- Access a static member -----
+
+print "\nA total of", example.cvar.Shape_nshapes,"shapes were created"
+
+# ----- Member data access -----
+
+# Set the location of the object
+
+# Notice how we can do this using functions specific to
+# the 'Circle' class.
+example.Circle_x_set(c, 20)
+example.Circle_y_set(c, 30)
+
+# Now use the same functions in the base class
+example.Shape_x_set(s,-10)
+example.Shape_y_set(s,5)
+
+print "\nHere is their current position:"
+print "    Circle = (%f, %f)" % (example.Shape_x_get(c), example.Shape_y_get(c))
+print "    Square = (%f, %f)" % (example.Shape_x_get(s), example.Shape_y_get(s))
+
+# ----- Call some methods -----
+
+print "\nHere are some properties of the shapes:"
+for o in [c,s]:
+      print "   ", o
+      print "        area      = ", example.Shape_area(o)
+      print "        perimeter = ", example.Shape_perimeter(o)
+
+# Notice how the Shape_area() and Shape_perimeter() functions really
+# invoke the appropriate virtual method on each object.
+
+# ----- Try to cause a type error -----
+
+print "\nI'm going to try and break the type system"
+try:
+    # Bad script!
+    Square_area(c)         # Try to invoke Square method on a Circle
+    print "    Bad bad SWIG!"
+except:
+    print "    Well, it didn't work. Good SWIG."
+
+
+# ----- Delete everything -----
+
+print "\nGuess I'll clean up now"
+
+# Note: this invokes the virtual destructor
+example.delete_Shape(c)
+example.delete_Shape(s)
+
+print example.cvar.Shape_nshapes,"shapes remain"
+print "Goodbye"
+