Ring - Fenster-Animation | .NET-Komponenten und C#-Snippets | myCSharp.de

Den folgenden Code könnte man auch in die eigenen Apps einbauen um z.B: Kunden darauf aufmerksam zu machen, dass noch eine Eingabe von ihm erwartet wird.

Was der Code genau macht findet selber raus:-)

C#-Code:

using System;

using System.Runtime.InteropServices;

using System.Drawing;

using System.Windows.Forms;





namespace WindowsApplication19

{

    /// <summary>

    /// Class for getting images of the desktop.

    /// </summary>

    /// <threadsafety static="false" instance="false"/>

    /// <note type="caution">This class is not thread safe.</note>

    /// <remarks>This class has been scaled back to the essentials for capturing a segment of

    /// the desktop in order to keep Cropper as small as possible.</remarks>

    internal class Desktop

    {

        private const int SRCCOPY = 0x00CC0020;



        #region Dll Imports



        [DllImport("user32.dll", CharSet=CharSet.Ansi, ExactSpelling=true, SetLastError=false)]

        static extern IntPtr GetDesktopWindow();



        [DllImport("user32.dll", CharSet=CharSet.Ansi, ExactSpelling=true, SetLastError=false)]

        private static extern IntPtr GetWindowDC(IntPtr hwnd);



        [DllImport("user32.dll", CharSet=CharSet.Ansi, ExactSpelling=true, SetLastError=false)]

        private static extern int ReleaseDC(IntPtr hwnd, IntPtr dc);



        [DllImport("gdi32.dll", CharSet=CharSet.Ansi, ExactSpelling=true, SetLastError=false)]

        private static extern UInt64 BitBlt

            (IntPtr hDestDC, int x, int y, int nWidth, int nHeight,

            IntPtr hSrcDC, int xSrc, int ySrc, System.Int32 dwRop);



        #endregion



        private Desktop(){}



        /// <summary>

        /// Gets a segment of the desktop as an image.

        /// </summary>

        /// <param name="x">Starting point X coordinate.</param>

        /// <param name="y">Starting point Y coordinate.</param>

        /// <param name="width">The width of the area to capture.</param>

        /// <param name="height">The height of the area to capture.</param>

        /// <returns>A <see cref="System.Drawing.Image"/> containg an image of the desktop

        /// at the specified coordinates</returns>

        internal static Image GetBitmap(int x, int y, int width, int height)

        {

            Graphics desktopGraphics;

            Image desktopImage;

            Graphics drawGraphics;

            Image drawImage;

            Rectangle virtualScreen = SystemInformation.VirtualScreen;



            //Create the image and graphics to capture the desktop.

            //

            using(desktopImage = new Bitmap(virtualScreen.Width, virtualScreen.Height))

            {

                using(desktopGraphics = Graphics.FromImage(desktopImage))

                {

                    //Pointers for window handles

                    //

                    IntPtr ptrDesktop = desktopGraphics.GetHdc();

                    IntPtr ptrDesktopWindow = GetDesktopWindow();

                    IntPtr ptrWindowDC = GetWindowDC(ptrDesktopWindow);



                    //Grap the entire virtual desktop

                    //

                    BitBlt(ptrDesktop,

                        0,

                        0,

                        virtualScreen.Width,

                        virtualScreen.Height,

                        ptrWindowDC,

                        virtualScreen.X,

                        virtualScreen.Y,

                        SRCCOPY);



                    //Release and dispose the graphics object so we have an image to work with.

                    //

                    ReleaseDC(ptrDesktopWindow, ptrWindowDC);

                    desktopGraphics.ReleaseHdc(ptrDesktop);



                    //Set pointers to zero.

                    //

                    ptrDesktop = IntPtr.Zero;

                    ptrDesktopWindow = IntPtr.Zero;

                    ptrWindowDC = IntPtr.Zero;

                }



                //Create a new image and graphics object the size we want so we can 'crop' it out of the desktop.

                //

                drawImage = new Bitmap(width, height);

                using(drawGraphics = Graphics.FromImage(drawImage))

                {

                    //Draw the area of the desktop we want into the new image.

                    //

                    drawGraphics.DrawImage(

                        desktopImage,

                        new Rectangle(new Point(0,0), new Size(width, height)),

                        new Rectangle((virtualScreen.X - x) *-1, (virtualScreen.Y - y) *-1, width, height),

                        GraphicsUnit.Pixel);



                }

            }



            //Return a referance to our image.  

            //Don't forget to dispose it in the client code when finished.

            //You will have memory leaks if not.

            //

            return drawImage;

        }

    }

}

C#-Code:

using System;

using System.Drawing;

using System.Collections;

using System.ComponentModel;

using System.Windows.Forms;

using System.Data;



namespace WindowsApplication19

{

    /// <summary>

    /// Summary description for Form1.

    /// </summary>

    public class Form1 : System.Windows.Forms.Form

    {

        private Rectangle _RectScreen=Screen.PrimaryScreen.WorkingArea;

        private System.Windows.Forms.Timer timer1;

        private System.ComponentModel.IContainer components;



        public Form1()

        {

            //

            // Required for Windows Form Designer support

            //

            InitializeComponent();



            //

            // TODO: Add any constructor code after InitializeComponent call

            //

            this.Size=new Size(this._RectScreen.Width+100,this._RectScreen.Height+100);

            this.BackgroundImage =Desktop.GetBitmap(0,0,1280,1024);



        }



        /// <summary>

        /// Clean up any resources being used.

        /// </summary>

        protected override void Dispose( bool disposing )

        {

            if( disposing )

            {

                if (components != null)

                {

                    components.Dispose();

                }

            }

            base.Dispose( disposing );

        }



        #region Windows Form Designer generated code

        /// <summary>

        /// Required method for Designer support - do not modify

        /// the contents of this method with the code editor.

        /// </summary>

        private void InitializeComponent()

        {

            this.components = new System.ComponentModel.Container();

            this.timer1 = new System.Windows.Forms.Timer(this.components);

            // 

            // timer1

            // 

            this.timer1.Enabled = true;

            this.timer1.Interval = 5000;

            this.timer1.Tick += new System.EventHandler(this.timer1_Tick);

            // 

            // Form1

            // 

            this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);

            this.ClientSize = new System.Drawing.Size(292, 273);

            this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;

            this.Name = "Form1";

            this.ShowInTaskbar = false;

            this.StartPosition = System.Windows.Forms.FormStartPosition.Manual;

            this.Text = "Form1";



        }

        #endregion



        /// <summary>

        /// The main entry point for the application.

        /// </summary>

        [STAThread]

        static void Main()

        {

            Application.Run(new Form1());

        }



        private void timer1_Tick(object sender, System.EventArgs e)

        {

            this.Ring();

        }



        private void Ring()

        {

            this.BackgroundImage=Desktop.GetBitmap(0,0,1280,1024);

            this.Show();



            for (int i=0;i<10;i++)

            {



                this.Location=new Point(this.Location.X-20,this.Location.Y);

                Application.DoEvents();

                this.Location=new Point(this.Location.X+40,this.Location.Y);

                Application.DoEvents();

                this.Location=new Point(this.Location.X-20,this.Location.Y);

                Application.DoEvents();



            }

            this.Hide();

            this.BackgroundImage.Dispose();

            this.BackgroundImage=null;

        }

    }

}