Issue while running Multiple window - Few windows are hanging and not running smoothly.
Posted Wednesday, 9 February, 2011 - 13:09 by asishnr@gmail.com| Project: | The Open Toolkit library |
| Version: | all versions |
| Component: | Code |
| Category: | support request |
| Priority: | critical |
| Assigned: | Unassigned |
| Status: | open |
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I have a custom a custom contol as shown below
public class MultiStripChartGL : GLControl
{
}
I use this for plotting a graph on the form. The issue is that when I create multiple instance of this control in run time and drag and drop values to it to run those params ( that's how i designed to plot the graph), it works for 1 or 2 instances. The moment the number of instance increase to 4 to 5 only last 2 charts are running smoothly. Rest are actually hangs a lot...
I wrote the following things....
1) I wrote the following lines at the beginning and end of the OnPaint method and resize event
this.Context.MakeCurrent(this.WindowInfo);
this.Context.SwapBuffers();
2) Added the below code in the load
this.Context.VSync = true;
These two improves the performance but still the first few windows out of all 5 windows are running so slowly or having hanging.. Please help. Its very urgent....
Comments
#1
How are you updating the graphs? Are you waiting for normal Paint events or are you using a Invalidate or Idle game loop?
It is very difficult to guess what might be wrong without seeing some code (e.g. your Application.Idle loop, if you are using that).
#2
Hello Fiddler, Thanks for your reply.... :)
OnLoad event I have the code as follows... Where i call the invalidate method.
_newThread = new System.
Threading.Thread(this.threadLoop);
newThread.Start();
private void threadLoop()
{
sw.Start();
while (_newThread .IsAlive)
{
double milliseconds = computeTimeSlice();
this.accumulate(milliseconds);
Invalidate();
System.Threading.Thread.Sleep(70);
}
}
Coming back to the inputs, x axis we have a number (say between -100 to 100) and y axis is time. As i explained earlier, We drop this input parameter from a main window and it maintains a list of numbers (which grows dynamically - say 10 points per second or so and these values are plotted in x axis of the graph)
My OnPaint looks like this....
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
this.Context.MakeCurrent(this.WindowInfo);
GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
GL.MatrixMode(MatrixMode.Modelview);
GL.LoadIdentity();
//
//My code to get the values from parameter and plot it in the graph
//The code is in such a way that we draw only those points which comes in the display area.
//
this.Context.SwapBuffers();
}
Please let me know if I can provide you some more information to sort this out?