splashform.cs

Windows mobile 图形编程例子

using System;
using System.ComponentModel;
using System.Drawing;
using System.IO;
using System.Windows.Forms;
using Microsoft.WindowsCE.Forms;

namespace MobileDevelopersHandbook
{
    public partial class SplashForm : Form
    {
        public SplashForm()
        {
            InitializeComponent();
        }

        private void SplashForm_Load(object sender, EventArgs e)
        {
            // Show full screen
            this.ControlBox = false;
        }

        protected override void OnPaint(PaintEventArgs e)
        {
            using (Image backgroundImage =
                new Bitmap(System.Reflection.Assembly.GetExecutingAssembly()
                .GetManifestResourceStream("MobileDevelopersHandbook.Graphic.JPG")))
            {
                // Fill the background
                e.Graphics.Clear(Color.Black);

                // Draw the image, but scale it
                // SourceRect is entire image
                Rectangle srcRect = 
                    new Rectangle(0, 0, backgroundImage.Width, backgroundImage.Height);
                // Define the destination rectangle size as 50% of the clipping rectangle
                Rectangle destRect = 
                    new Rectangle(0, 0, e.ClipRectangle.Width / 2, e.ClipRectangle.Height / 2);
                // Reposition origin to centre the image on the screen
                destRect.Location = new Point(
                    (e.ClipRectangle.Width - destRect.Width) / 2,
                    (e.ClipRectangle.Height - destRect.Height) / 2);

                // Draw the image
                e.Graphics.DrawImage(backgroundImage, destRect, srcRect, GraphicsUnit.Pixel);
            }

            // Create string to draw.
            string drawString = "Mobile Developers Handbook";
            // Create font and brush.
            SolidBrush drawBrush = new SolidBrush(Color.Yellow);

            // Draw string to screen using the LogFont.
            using (Font ft = CreateLogFont(90))
            {
                e.Graphics.DrawString(drawString,
                                      ft,
                                      drawBrush,
                                      5,
                                      this.Height - 20,
                                      new StringFormat(StringFormatFlags.NoClip | StringFormatFlags.NoWrap));
            }

            base.OnPaint(e);
        }

        private const float POINTS_PER_INCH = 72f;

        private Font CreateLogFont(int angle)
        {
            // Create and define a LogFont structure.
            LogFont fontStruct = new LogFont();

            using (Graphics g = this.CreateGraphics())
            {
                // Scale 10point for the dpi of the current display
                // also make it negative, means match against character 
                // height of available fonts
                fontStruct.Height = -1 * (int)(14f * (g.DpiY / POINTS_PER_INCH));
            }

            // Since font width is usually dependent on the height, 
            // usual to set width to zero
            fontStruct.Width = 0;

            // Set the font angle.
            // Remember to multiply by 10.
            fontStruct.Escapement = angle * 10;

            // The Escapement member specifies both the
            // escapement and orientation. You should set
            // Escapement and Orientation to the same value.
            fontStruct.Orientation = fontStruct.Escapement;

            // No formatting.
            fontStruct.Italic = 0;
            fontStruct.Underline = 0;
            fontStruct.StrikeOut = 0;
            // Weight: 0 = default, 400 = normal, 700 = bold
            fontStruct.Weight = 0;

            fontStruct.CharSet = LogFontCharSet.Default;
            fontStruct.OutPrecision = LogFontPrecision.Default;
            fontStruct.ClipPrecision = LogFontClipPrecision.Default;
            fontStruct.Quality = LogFontQuality.Default;
            fontStruct.PitchAndFamily = LogFontPitchAndFamily.Default;

            fontStruct.FaceName = "Arial";

            // Create the font from the LogFont structure.
            return Font.FromLogFont(fontStruct);
        }
    }
}