No Flicker (Flicker Free) Animation
/*
Code revised from chapter 9
GDI+ Custom Controls with Visual C# 2005
By Iulian Serban, Dragos Brezoi, Tiberiu Radu, Adam Ward
Language English
Paperback 272 pages [191mm x 235mm]
Release date July 2006
ISBN 1904811604
Sample chapter
http://www.packtpub.com/files/1604_CustomControls_SampleChapter.pdf
For More info on GDI+ Custom Control with Microsoft Visual C# book
visit website www.packtpub.com
*/
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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