ASP.NET PDF Viewer using C#, VB/NET

Draws a solid polygon, which is a closed set of lines from an array of points Draws a solid rectangle represented by a coordinate and its width and height Draws a solid set of rectangles from an array of rectangles Draws an image specified by the SystemDrawingIcon type Draws an image specified by the SystemDrawingImage type Draws an image specified by the SystemDrawingImage type with no scaling Draws a string of characters Gives the dimensions of the string of characters so the programmer can calculate where it should be placed on the image Draws an outline represented by the SystemDrawingDrawing2DGraphicsPath This is a class that allows you to add geometric constructs such as the curves, rectangle, ellipses, and polygons described earlier to save you from recalculating them each time.

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Figure 5-37. NXT theremin The NXT-G program shown in Figure 5-38 couldn t be much simpler. The Raw value from the volume sensor is read in on port 1. To make sure that the value reaches 0 or less, the first math block subtracts 400 from the Raw value. The next Math block scales the value to the range of the volume input on the Sound block. You might need to adjust these values for your particular sensors and lighting

Listing 3-8. Echoing the First Name, Middle Name, and Birthday Back to the Browser package ajaxbook.chap3; import import import import java.io.*; java.net.*; javax.servlet.*; javax.servlet.http.*;

This is useful if you want to draw something that is complicated but fairly static Provides the same functionality as DrawPath, except draws an image that is solid rather than an outline..

conditions. The Sound block volume input range is 0 to 100, but it actually has only 5 volume levels: 100, 75, 50, 25, and 0 for mute. Unfortunately, this coarse volume control limits the vibrato effects the original theremin is famous for. The tone or pitch is read in on port 2, and can be fed directly to the tone input of the Sound block.

The second area is closely related to the System.Drawing.Graphics object; it is the creation of the Icon, Image, Pen, and Brush objects that are used by its methods. Table 8-2 shows examples of how to create these objects via their constructors.

public class GetAndPostExample extends HttpServlet { protected void processRequest(HttpServletRequest request, HttpServletResponse response, String method) throws ServletException, IOException { //Set content type of the response to text/xml response.setContentType("text/xml"); //Get the user's input String firstName = request.getParameter("firstName"); String middleName = request.getParameter("middleName"); String birthday = request.getParameter("birthday"); //Create the response text String responseText = "Hello " + firstName + " " + middleName + ". Your birthday is " + birthday + "." + " [Method: " + method + "]"; //Write the response back to the browser PrintWriter out = response.getWriter(); out.println(responseText); //Close the writer out.close(); } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //Process the request in method processRequest processRequest(request, response, "GET"); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //Process the request in method processRequest processRequest(request, response, "POST"); } }

Color.FromArgb(33, 44, 55) Color.FromKnownColor(KnownColor.Crimson) Color.FromName("HotPink") new Font(FontFamily.GenericSerif, 8.0f) Image.FromFile("myimage.jpg") Image.FromStream(File.OpenRead ("myimage.gif")) new Icon("myicon.ico") new Icon(File.OpenRead("myicon.ico")) new Pen(Color.FromArgb(33, 44, 55)) new Pen(SystemColors.Control, 2.0f) new SolidBrush(Color.FromName("Black")) new TexturedBrush(Image.FromFile ("myimage.jpg"))

Figure 5-38. NXT-G theremin program Moving your hand toward the volume Light Sensor increases the volume, while moving your other hand toward the tone Light Sensor increases the frequency of the note. A unique feature of a theremin is that it can hold a note indefinitely if you don t move either hand.

Let s examine the server-side code first This example uses a Java servlet to handle the request, although you can use any server-side technology such as PHP, CGI, or NET Java servlets must define a doGet method and a doPost method, with each method being called according to the request method In this example, both doGet and doPost will call the same method, processRequest, to handle the request The processRequest method starts by setting the content type of the response to text/xml, even though in this example XML isn t actually used The three input fields are retrieved from the request object by using the getParameter method A simple sentence is built using the first name, middle name, and birthday, along with the type of request method The sentence is then written to the response output stream, and finally the response output stream is closed.