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Draws a rectangle Draws a polygon (shape with three or more sides) Draws a circle Draws an ellipse Draws an arc Draws a line Draws several lines Draws an antialiased (smooth) line Draws several antialiased lines

It s possible to create interfaces in F# where the parameters don t have names, but those are defined by their types You can compile an interface with parameterless functions that acts as a WCF contract, but you ll receive an error when you invoke the service because the parameter names are used (via reflection) in the WCF framework to create the data that you send across the wire The class GreetingService provides the implementation of the contract You offer a greeting by appending "hello: " to whatever name is passed To integrate the service with the web server, you need to create a svc file, which plays a similar role to the web service s asmx file This tells the web server what type it should use to handle the service request You can see an example of an svc in the service that follows.

This function draws a rectangle onto a surface. In addition to the destination surface and color, pygame.rect takes the dimensions of the rectangle you want to draw and the width of the line. If you set width to 0 or omit it, the rectangle will be filled with solid color; otherwise, just the edges will be drawn.

Note that you see the complete file in this example such files are typically only one line long The most important attribute in the svc file is the Service attribute that tells the web server which type it should use: <% @ServiceHost Debug="true" Service="StrangelightsServicesGreetingService" %> Finally, you must configure the service Because WCF offers a choice of protocols, you use the configuration file to tell it which one to use The configuration file in Listing 11-10 shows a configuration file that you might use to configure your service The service element defines two endpoints; these are the protocols that a client can use to talk to this service.

public Product() { } public Product(int productID, int categoryID, string productName, decimal price, int quantity) { this.productID = productID; this.categoryID = categoryID; this.productName = productName; this.price = price; this.quantity = quantity; } public int ProductID { get { return this.productID; } set { this.productID = value; } } public int CategoryID { get { return this.categoryID; } set { this.categoryID = value; } }

One of the endpoints is a standard web service HTTP binding, and the other is a metadata exchange binding; this allows the service to expose metadata about itself that will tell any potential client how it should talk to the service This is the endpoint you ll use when you create the client proxy..

Let s write a script to test Pygame s rectangle-drawing capabilities. Listing 4-9 draws ten randomly filled rectangles in random positions and colors. It produces a strangely pretty, modern art like effect. Listing 4-9. Rectangle Test import pygame from pygame.locals import * from sys import exit from random import * pygame.init() screen = pygame.display.set_mode((640, 480), 0, 32) while True: for event in pygame.event.get(): if event.type == QUIT: exit() screen.lock() for count in range(10): random_color = (randint(0,255), randint(0,255), randint(0,255)) random_pos = (randint(0,639), randint(0,479)) random_size = (639-randint(random_pos[0],639), 479- randint (random_pos[1],479)) pygame.draw.rect(screen, random_color, Rect(random_pos, random_size)) screen.unlock() pygame.display.update() There is another way to draw filled rectangles on a surface. The fill method of surface objects takes a Rect-style object that defines what part of the surface to fill and will draw a perfect filled rectangle! In fact, fill can be faster than pygame.draw.rect; it can potentially be hardware accelerated (in other words, performed by the graphics card and not the main processor).

public string ProductName { get { return this.productName; } set { this.productName = value; } } public decimal Price { get { return this.price; } set { this.price = value; } } public int Quantity { get { return this.quantity; } set { this.quantity = value; } } } } Next, update the ProductTests.cs file to set up and tear down a category for testing. Make the changes shown in Listing 13-24.