Javascript examples.

Examples/javascript/class/Makefile

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+TOP = ../..
+SWIG = $(TOP)/../preinst-swig
+CXXSRCS    = example.cxx
+JS_SCRIPT = runme.js
+TARGET = example
+INTERFACE = example.i
+
+wrapper::
+	$(MAKE) -f $(TOP)/Makefile CXXSRCS='$(CXXSRCS)' SWIG='$(SWIG)' \
+	SWIGOPT='$(SWIGOPT)' TARGET='$(TARGET)' INTERFACE='$(INTERFACE)' javascript_wrapper_cpp
+
+build:: wrapper
+	$(MAKE) -f $(TOP)/Makefile CXXSRCS='$(CXXSRCS)' SWIG='$(SWIG)' \
+	SWIGOPT='$(SWIGOPT)' TARGET='$(TARGET)' INTERFACE='$(INTERFACE)' javascript_build
+
+clean::
+	$(MAKE) -f $(TOP)/Makefile javascript_clean
+
+check:: build
+	$(MAKE) -f $(TOP)/Makefile JSCXXSRCS='$(JSCXXSRCS)' TARGET='$(TARGET)' \
+		TOP='$(TOP)' JS_SCRIPT='$(JS_SCRIPT)' javascript_run

Examples/javascript/class/binding.gyp

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+{
+  "targets": [
+    {
+      "target_name": "example",
+      "sources": [ "example.cxx", "example_wrap.cxx" ]
+    }
+  ]
+}

Examples/javascript/class/example.cxx

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+/* File : example.c */
+#include <iostream>
+#include "example.h"
+#define M_PI 3.14159265358979323846
+
+/* Move the shape to a new location */
+void Shape::move(double dx, double dy) {
+  x += dx;
+  y += dy;
+}
+
+int Shape::nshapes = 0;
+
+double Circle::area(void) {
+  return M_PI*radius*radius;
+}
+
+double Circle::perimeter(void) {
+  return 2*M_PI*radius;
+}
+
+double Square::area(void) {
+  return width*width;
+}
+
+double Square::perimeter(void) {
+  return 4*width;
+}

Examples/javascript/class/example.h

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+/* File : example.h */
+
+class Shape {
+public:
+  Shape() {
+    nshapes++;
+  }
+  virtual ~Shape() {
+    nshapes--;
+  };
+  double  x, y;   
+  void    move(double dx, double dy);
+  virtual double area(void) = 0;
+  virtual double perimeter(void) = 0;
+  static  int nshapes;
+};
+
+class Circle : public Shape {
+private:
+  double radius;
+public:
+  Circle(double r) : radius(r) { };
+  virtual double area(void);
+  virtual double perimeter(void);
+};
+
+class Square : public Shape {
+private:
+  double width;
+public:
+  Square(double w) : width(w) { };
+  virtual double area(void);
+  virtual double perimeter(void);
+};

Examples/javascript/class/example.i

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+/* File : example.i */
+%module example
+
+%{
+#include "example.h"
+%}
+
+/* Let's just grab the original header file here */
+%include "example.h"
+

Examples/javascript/class/runme.js

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+var example = require("./build/Release/example");
+
+// ----- Object creation -----
+
+console.log("Creating some objects:");
+c = new example.Circle(10);
+console.log("Created circle " + c);
+s = new example.Square(10);
+console.log("Created square " + s);
+
+// ----- Access a static member -----
+console.log("\nA total of " + example.Shape.nshapes + " shapes were created"); // access static member as properties of the class object
+
+// ----- Member data access -----
+// Set the location of the object.
+// Note: methods in the base class Shape are used since
+// x and y are defined there.
+
+c.x = 20;
+c.y = 30;
+s.x = -10;
+s.y = 5;
+
+console.log("\nHere is their new position:");
+console.log("Circle = (" + c.x + "," + c.y + ")");
+console.log("Square = (" + s.x + "," + s.y + ")");
+
+// ----- Call some methods -----
+console.log("\nHere are some properties of the shapes:");
+console.log("Circle:");
+console.log("area = " + c.area() + "");
+console.log("perimeter = " + c.perimeter() + "");
+console.log("\n");
+console.log("Square:");
+console.log("area = " + s.area() + "");
+console.log("perimeter = " + s.perimeter() + "");
+
+// ----- Delete everything -----
+console.log("\nGuess I'll clean up now");
+// Note: this invokes the virtual destructor
+delete c;
+delete s;
+
+console.log(example.Shape.nshapes + " shapes remain");
+
+console.log("Goodbye");