Hi,
I am developing a simple applications using Thread
class to change the color of the square (Lab
assignment). Everything is working properly, except I
have to drag or cls /opn the windows in linux to fix
theThread and the only solutions to produce the color
change.
Well, OnPaint is only called on demand, and not when
a field like "c" suddenly changed ;-)
If you want to cycle the colors, then you have
to force a redraw using form's Refresh () method.
To perform the refresh from another thread, you
probably need to use form's Invoke method, because
UI components usually have a thread affinity.
Rob
I think it has something todo with the X11 rendering
in Linux. Are there any solutions to this problems?
here is my code: (This code should be working in MS
Windows)
[code]
using System;
using System.Windows.Forms;
using System.Threading;
using System.Drawing;
public class ColoredBoxes : Form
{
private Color c;
public ColoredBoxes()
{
Thread t = new Thread(new ThreadStart(Run));
t.Start();
}
protected override void OnPaint(PaintEventArgs e)
{
Graphics g = e.Graphics;
Pen blue = new Pen(c, 3);
g.DrawRectangle(blue, 100,100,30,30);
base.OnPaint(e);
}
public void Run()
{
Random r = new Random();
while(true)
{
c = Color.FromArgb(r.Next(256), r.Next(256),
r.Next(256));
Thread.Sleep(200);
}
}
}
public class Test{
public static void Main()
{
Application.Run(new ColoredBoxes());
}
}
[/code]
Thank you for all your help guys
--
Harry Tanama
Programmer/Developer
.NET / JAVA
Powerd by GNU/LiNUX
"Let Christ be glorify in our words and actions."
"Jesus Christ save the entire human race from sins & GNU/Linux save human from high
cost software applications."
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