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1 [C#] Flicker Free Animation on Wed Aug 18, 2010 11:34 pm

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Scrolling Animation. Can't say much about. Just a scrolling animation.
Code:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace FlickerFree
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void tbInterval_Scroll(object sender, EventArgs e)
        {
            scrollingText.ScrollTimeInterval = tbInterval.Value;
        }

        private void tbAmount_Scroll(object sender, EventArgs e)
        {
            scrollingText.ScrollPixelAmount = tbAmount.Value;
        }
       
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (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.scrollingText = new FlickerFree.ScrollingText();
            this.grpTrackerBars = new System.Windows.Forms.GroupBox();
            this.label1 = new System.Windows.Forms.Label();
            this.label2 = new System.Windows.Forms.Label();
            this.tbAmount = new System.Windows.Forms.TrackBar();
            this.tbInterval = new System.Windows.Forms.TrackBar();
            this.grpTrackerBars.SuspendLayout();
            ((System.ComponentModel.ISupportInitialize)(this.tbAmount)).BeginInit();
            ((System.ComponentModel.ISupportInitialize)(this.tbInterval)).BeginInit();
            this.SuspendLayout();
            //
            // scrollingText
            //
            this.scrollingText.BackColor = System.Drawing.Color.LightGray;
            this.scrollingText.Font = new System.Drawing.Font("Verdana", 26.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.scrollingText.ForeColor = System.Drawing.Color.Navy;
            this.scrollingText.Location = new System.Drawing.Point(38, 29);
            this.scrollingText.Margin = new System.Windows.Forms.Padding(12, 10, 12, 10);
            this.scrollingText.Name = "scrollingText";
            this.scrollingText.ScrollPixelAmount = 10;
            this.scrollingText.ScrollTimeInterval = 100;
            this.scrollingText.Size = new System.Drawing.Size(300, 80);
            this.scrollingText.TabIndex = 0;
            this.scrollingText.Text = "Scrolling Text that Scrolls";
            //
            // grpTrackerBars
            //
            this.grpTrackerBars.Controls.Add(this.tbInterval);
            this.grpTrackerBars.Controls.Add(this.tbAmount);
            this.grpTrackerBars.Controls.Add(this.label2);
            this.grpTrackerBars.Controls.Add(this.label1);
            this.grpTrackerBars.Location = new System.Drawing.Point(38, 132);
            this.grpTrackerBars.Name = "grpTrackerBars";
            this.grpTrackerBars.Size = new System.Drawing.Size(322, 183);
            this.grpTrackerBars.TabIndex = 1;
            this.grpTrackerBars.TabStop = false;
            //
            // label1
            //
            this.label1.AutoSize = true;
            this.label1.Location = new System.Drawing.Point(7, 37);
            this.label1.Name = "label1";
            this.label1.Size = new System.Drawing.Size(72, 13);
            this.label1.TabIndex = 0;
            this.label1.Text = "Scroll Amount";
            //
            // label2
            //
            this.label2.AutoSize = true;
            this.label2.Location = new System.Drawing.Point(10, 134);
            this.label2.Name = "label2";
            this.label2.Size = new System.Drawing.Size(71, 13);
            this.label2.TabIndex = 1;
            this.label2.Text = "Scroll Interval";
            //
            // tbAmount
            //
            this.tbAmount.Location = new System.Drawing.Point(101, 19);
            this.tbAmount.Maximum = 20;
            this.tbAmount.Name = "tbAmount";
            this.tbAmount.Size = new System.Drawing.Size(200, 45);
            this.tbAmount.TabIndex = 2;
            this.tbAmount.Value = 1;
            this.tbAmount.Scroll += new System.EventHandler(this.tbAmount_Scroll);
            //
            // tbInterval
            //
            this.tbInterval.Location = new System.Drawing.Point(101, 123);
            this.tbInterval.Maximum = 500;
            this.tbInterval.Minimum = 10;
            this.tbInterval.Name = "tbInterval";
            this.tbInterval.Size = new System.Drawing.Size(200, 45);
            this.tbInterval.TabIndex = 3;
            this.tbInterval.TickFrequency = 10;
            this.tbInterval.Value = 100;
            this.tbInterval.Scroll += new System.EventHandler(this.tbInterval_Scroll);
            //
            // Form1
            //
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(456, 332);
            this.Controls.Add(this.grpTrackerBars);
            this.Controls.Add(this.scrollingText);
            this.Name = "Form1";
            this.Text = "Form1";
            this.grpTrackerBars.ResumeLayout(false);
            this.grpTrackerBars.PerformLayout();
            ((System.ComponentModel.ISupportInitialize)(this.tbAmount)).EndInit();
            ((System.ComponentModel.ISupportInitialize)(this.tbInterval)).EndInit();
            this.ResumeLayout(false);

        }

        #endregion

        private ScrollingText scrollingText;
        private System.Windows.Forms.GroupBox grpTrackerBars;
        private System.Windows.Forms.TrackBar tbInterval;
        private System.Windows.Forms.TrackBar tbAmount;
        private System.Windows.Forms.Label label2;
        private System.Windows.Forms.Label label1;
       
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Form1());
        }
    }
    public partial class ScrollingText : UserControl
    {
        private string text;
        private int scrollAmount = 10;
        private int position = 10;

        public ScrollingText()
        {
            InitializeComponent();
        }

        private void ScrollingText_Load(object sender, EventArgs e)
        {
            this.ResizeRedraw = true;
            if (!this.DesignMode)
            {
                scrollTimer.Enabled = true;
            }

        }

        private void scrollTimer_Tick(object sender, EventArgs e)
        {
            position += scrollAmount;
            this.Invalidate();

        }
        [Browsable(true),DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]
        public override string Text
        {
            get
            {
                return text;
            }
            set
            {
                text = value;
                this.Invalidate();
            }
        }

        public int ScrollTimeInterval
        {
            get
            {
                return scrollTimer.Interval;
            }
            set
            {
                scrollTimer.Interval = value;
            }
        }

        public int ScrollPixelAmount
        {
            get
            {
                return scrollAmount;
            }
            set
            {
                scrollAmount = value;
            }
        }

        private void ScrollingText_Paint(object sender, PaintEventArgs e)
        {

        }
        protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
        {
            // to avoid a design-time error we need to add the following line
            if (e.ClipRectangle.Width == 0)
            {
                return;
            }

            base.OnPaint(e);
            if (position > this.Width)
            {
                // Reset the text to scroll back onto the control.
                position = -(int)e.Graphics.MeasureString(text, this.Font).Width;
            }

            // Create the drawing area in memory.
            // Double buffering is used to prevent flicker.
            Bitmap bufl = new Bitmap(e.ClipRectangle.Width, e.ClipRectangle.Height);
            Graphics g = Graphics.FromImage(bufl);
            g.FillRectangle(new SolidBrush(this.BackColor), e.ClipRectangle);
            g.DrawString(text, this.Font, new SolidBrush(this.ForeColor), position, 0);
            // Render the finished image on the form. 
            e.Graphics.DrawImageUnscaled(bufl, 0, 0);
            g.Dispose();
        }

/// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Component 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.scrollTimer = new System.Windows.Forms.Timer(this.components);
            this.SuspendLayout();
            //
            // scrollTimer
            //
            this.scrollTimer.Tick += new System.EventHandler(this.scrollTimer_Tick);
            //
            // ScrollingText
            //
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.Name = "ScrollingText";
            this.Size = new System.Drawing.Size(400, 100);
            this.Load += new System.EventHandler(this.ScrollingText_Load);
            this.Paint += new System.Windows.Forms.PaintEventHandler(this.ScrollingText_Paint);
            this.ResumeLayout(false);

        }

        #endregion

        internal System.Windows.Forms.Timer scrollTimer;
    }
}

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