Gdi+ Memory Leak >Scrolling text

[michael cohen]

Hey Guys a few days ago i made a custom control that uses GDI+. after playing this control on the screen for 4 hours+ the cpu is getting 50% more Work and Memory Keep Leaking ... after that the text is moving very slow and so on... Here is my code

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
using ScreenerViewer.BL.NewsBar;
namespace ScreenerViewer
{

public partial class NewsBar : Control
{
    //timer 
    Timer t = new Timer();
    //position the text
    int Position;
    //normall mode text
    StringWriter SdisplayNormalMode = null;
    //Flicker Mode Text
    StringWriter SdisplayFlickerMode = null;
    //Separate the Text
    string sSeparatesign = " \* ";
    //Use it for Rest Position
    bool bRestPosition = false;
    // Backround Color For NormalMode
    Brush Backroundbrush = Brushes.Red;
    //Backround Color For Normal mode
    Brush BackroundFlickBrush = Brushes.Yellow;
    //Font color for flickermode
    Brush FontFlickerBrush =Brushes.Red;
    //counter for color change in flicker mode
    int iColorChange = 0;
    //first run of bar
    bool bFirstRun = false;
    
    Font TextFont = new Font(new FontFamily("arial"), 60);
    //Drawing the Point of the text
    PointF TextPoint = new PointF();
    private bool \_bFilckerMode;
    public bool bFilckerMode
    {
        get { return \_bFilckerMode; }
        set { \_bFilckerMode = value; }
    }

    public NewsBar()
    {
        
        InitializeComponent();
        this.SetStyle(ControlStyles.DoubleBuffer, true);
        this.SetStyle(ControlStyles.ResizeRedraw, true);

        SdisplayNormalMode =  new StringWriter();
        t.Interval = 10;
        t.Enabled = true;
        t.Tick += new EventHandler(t\_Tick);
        Position = 0;
        bFirstRun = true;
        
    }

    void t\_Tick(object sender, EventArgs e)
    {
      Position+=2;
      Invalidate();
     // Update();
    }

    protected override void OnPaint(PaintEventArgs pe)
    {
        
        if (!this.bFilckerMode)
        {
               //NormalMode
                pe.Graphics.FillRectangle(Backroundbrus

[leppie]

michael@cohen wrote:

after playing this control on the screen for 4 hours+ the cpu is getting 50% more Work and Memory Keep Leaking ... after that the text is moving very slow and so on...

michael@cohen wrote:

t.Interval = 10;

Do the math. 100 repaints a second! 15 frames a second will be more than enough.

xacc.ide - now with TabsToSpaces support
IronScheme - 1.0 alpha 4a out now (29 May 2008)

[Mycroft Holmes]

I can't beleive you rabbited through all that code or did the interval issues jump out!

Never underestimate the power of human stupidity RAH

[leppie]

Mycroft Holmes wrote:

did the interval issues jump out!

Mostly, did do a quick scan to see if he was wasting resources, but that was not the case.

xacc.ide - now with TabsToSpaces support
IronScheme - 1.0 alpha 4a out now (29 May 2008)

[michael cohen]

thanx for checking the code. ill try to do as you say...