Dear all,
picturebox mouse move seems to start new thread each time it is called.
At least I see in debuger many threads.
---Non user code--
Picturebox.MouseMove
This seems to spoil my algorithm.
SyncLock Me
Do()
EndSyncloc
Don't fixes the problem.
Any advice would be greatly apreciated.
Best regards,
Boni 5 1630
"Boni" <oilia@nospam> schrieb: picturebox mouse move seems to start new thread each time it is called. At least I see in debuger many threads.
I am not able to reproduce this behavior with .NET 1.1. Are you talking
about the control's 'MouseMove' event? Please post the relevant parts of
your source code.
--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://classicvb.org/petition/>
Dear Herfried,
I use NET 1.1.
Private Sub PictureBox1_MouseMove(ByVal sender As Object, ByVal e As
System.Windows.Forms.MouseEventArgs) Handles PictureBox1.MouseMove
DoMove()
PictureBox1.Invalidate()
End Sub
Sub DoMove()
SyncLock m_Graph
Recalculate()
End SyncLock
End Sub
If some of internal assertions in Recalculate fails, I see in a debugger not
only one stack, but many of them.
"Herfried K. Wagner [MVP]" <hi***************@gmx.at> schrieb im Newsbeitrag
news:OC**************@TK2MSFTNGP12.phx.gbl... "Boni" <oilia@nospam> schrieb: picturebox mouse move seems to start new thread each time it is called. At least I see in debuger many threads.
I am not able to reproduce this behavior with .NET 1.1. Are you talking about the control's 'MouseMove' event? Please post the relevant parts of your source code.
-- M S Herfried K. Wagner M V P <URL:http://dotnet.mvps.org/> V B <URL:http://classicvb.org/petition/>
I added to DoMove a flag to see, if I am right about the multithreading, and
assertion often fails.
Dim a As Boolean = False
Sub DoMove()
SyncLock m_Graph
If (a) Then
Debug.assert(false, "Multithreading!!!!")
End If
a = True
....
Recalculate()
a=false
End SyncLock
....
"Boni" <oilia@nospam> schrieb im Newsbeitrag
news:el**************@TK2MSFTNGP14.phx.gbl... Dear Herfried, I use NET 1.1.
Private Sub PictureBox1_MouseMove(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles PictureBox1.MouseMove
DoMove()
PictureBox1.Invalidate()
End Sub
Sub DoMove()
SyncLock m_Graph
Recalculate()
End SyncLock
End Sub If some of internal assertions in Recalculate fails, I see in a debugger not only one stack, but many of them.
"Herfried K. Wagner [MVP]" <hi***************@gmx.at> schrieb im Newsbeitrag news:OC**************@TK2MSFTNGP12.phx.gbl... "Boni" <oilia@nospam> schrieb: picturebox mouse move seems to start new thread each time it is called. At least I see in debuger many threads.
I am not able to reproduce this behavior with .NET 1.1. Are you talking about the control's 'MouseMove' event? Please post the relevant parts of your source code.
-- M S Herfried K. Wagner M V P <URL:http://dotnet.mvps.org/> V B <URL:http://classicvb.org/petition/>
Each event returned by your control is NOT on a different thread. Each
windows application has a single UI thread which is processing events. Your
event handler routines are called from this single UI thread whenever an
event is received by the window. In the background Windows messages are
being processed and routed to each window handle. Your MouseMove event
handler will receive each event synchronously so there is no need for
SyncLock.
"Boni" wrote: I added to DoMove a flag to see, if I am right about the multithreading, and assertion often fails.
Dim a As Boolean = False
Sub DoMove()
SyncLock m_Graph
If (a) Then
Debug.assert(false, "Multithreading!!!!")
End If
a = True
.... Recalculate() a=false
End SyncLock ....
"Boni" <oilia@nospam> schrieb im Newsbeitrag news:el**************@TK2MSFTNGP14.phx.gbl... Dear Herfried, I use NET 1.1.
Private Sub PictureBox1_MouseMove(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles PictureBox1.MouseMove
DoMove()
PictureBox1.Invalidate()
End Sub
Sub DoMove()
SyncLock m_Graph
Recalculate()
End SyncLock
End Sub If some of internal assertions in Recalculate fails, I see in a debugger not only one stack, but many of them.
"Herfried K. Wagner [MVP]" <hi***************@gmx.at> schrieb im Newsbeitrag news:OC**************@TK2MSFTNGP12.phx.gbl... "Boni" <oilia@nospam> schrieb: picturebox mouse move seems to start new thread each time it is called. At least I see in debuger many threads.
I am not able to reproduce this behavior with .NET 1.1. Are you talking about the control's 'MouseMove' event? Please post the relevant parts of your source code.
-- M S Herfried K. Wagner M V P <URL:http://dotnet.mvps.org/> V B <URL:http://classicvb.org/petition/>
Dear Sirs,
I do not understand,
If MouseMove started and is still running, but other MouseMove event happens
will it wait until first one is finished? How can I force this behavoir?
Thank you very much,
Boni
"TrtnJohn" <Tr******@discussions.microsoft.com> schrieb im Newsbeitrag
news:81**********************************@microsof t.com... Each event returned by your control is NOT on a different thread. Each windows application has a single UI thread which is processing events. Your event handler routines are called from this single UI thread whenever an event is received by the window. In the background Windows messages are being processed and routed to each window handle. Your MouseMove event handler will receive each event synchronously so there is no need for SyncLock.
"Boni" wrote:
I added to DoMove a flag to see, if I am right about the multithreading, and assertion often fails.
Dim a As Boolean = False
Sub DoMove()
SyncLock m_Graph
If (a) Then
Debug.assert(false, "Multithreading!!!!")
End If
a = True
.... Recalculate() a=false
End SyncLock ....
"Boni" <oilia@nospam> schrieb im Newsbeitrag news:el**************@TK2MSFTNGP14.phx.gbl... > Dear Herfried, > I use NET 1.1. > > Private Sub PictureBox1_MouseMove(ByVal sender As Object, ByVal e As > System.Windows.Forms.MouseEventArgs) Handles PictureBox1.MouseMove > > DoMove() > > PictureBox1.Invalidate() > > End Sub > > Sub DoMove() > > SyncLock m_Graph > > Recalculate() > > End SyncLock > > End Sub > > > > If some of internal assertions in Recalculate fails, I see in a > debugger > not only one stack, but many of them. > > > > > > "Herfried K. Wagner [MVP]" <hi***************@gmx.at> schrieb im > Newsbeitrag news:OC**************@TK2MSFTNGP12.phx.gbl... >> "Boni" <oilia@nospam> schrieb: >>> picturebox mouse move seems to start new thread each time it is >>> called. >>> At least I see in debuger many threads. >> >> I am not able to reproduce this behavior with .NET 1.1. Are you >> talking >> about the control's 'MouseMove' event? Please post the relevant parts >> of >> your source code. >> >> -- >> M S Herfried K. Wagner >> M V P <URL:http://dotnet.mvps.org/> >> V B <URL:http://classicvb.org/petition/> > > This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
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