void drawShapes(Graphics graphics, Shape[] shapes)
{
for (int i = 0; i < shapes.Count(); i++)
{
switch (shapes[i].ShapeType)
{
case Shape.TYPELINE: graphics.drawLine(shapes[i].P1, shapes[i].P2);
break;
case Shape.TYPERECTANGLE: //draw the four edges.
graphics.drawRectangle(shapes[i].P1, shapes[i].P2);
break;
case Shape.TYPECIRCLE: graphics.drawCircle(shapes[i].P1, shapes[i].Radius);
break;
}
}
}