And a good tool to fix what just Joe brought up is:
https://github.com/slluis/gui-thread-check
This tool will, furthermore, be bundled by default in the next 2.99.1
release (so one more incentive to upgrade ).
On 06/11/12 22:37, Joe Dluzen wrote:
Though I haven't run your code, my first guess would be threading
issues. As with practically all GUI toolkits, components are not only
not threadsafe, but code doing anything with the components must be
invoked on the same thread, please see here:
http://www.mono-project.com/Responsive_Applications
In the code you have not posted, is anything started on new threads, or
on the threadpool? If so, you'd need to Invoke() any and all update code
to the GUI thread. All speculation right now, sorry.
Joe
On Tue, Nov 6, 2012 at 2:36 PM, Johnnie Odom <[email protected]
<mailto:[email protected]>> wrote:
Hello Everyone,
This is my first day on the mailing list, and as it is I have a
question regarding some odd behavior I am encountering.
I am writing an application on OS X 10.8 using C#, Mono 2.10.9 and
MonoDevelop 3.0.4 (including the Designer views) that makes some
simple changes to LDAP. As part of it, I decided to get fancy with
GTK#. All is going well, except for one behavior.
I have created a window class to display a progress bar and stop
button. I have further created a function in this class to update
the progress bar with a fraction and text message. In my code, I
create a new instance of this window class when real work is
happening in another class, and then populate it after every ten
iterations of a foreach loop.
My problem is that when the window is created FROM THE CLASS DOING
REAL WORK, it displays neither the progress bar widget, nor the
button. It displays only the window title and then white space
below. Only this window displays this behavior -- several other
windows that I create over the course of the application all display
appropriately.
If I instead create the progress bar window in Main.cs and call
Show(), it will display just fine. I can even call the function to
set its status from Main.cs and it will display correctly.
I have tried creating the window in Main.cs and passing it to the
class that does the real work later. I have tried creating it in
other classes besides the one that does the work. In all cases the
behavior is the same -- if the window is created and used solely in
Main.cs it will display fine, but if it it ever invoked or created
from anywhere else (whether or not it is created in another class or
in Main.cs) it will display incorrectly.
I have taken to using the debugger and break points to isolate the
behavior. If I set a breakpoint immediately after the window is
created, it is still blank -- that is, I do not think it is a case
that the window is just not keeping pace with any updates I am
sending. I have also compared the various values of the window
objects and attributes when it is displayed (created and used solely
in Main.cs) and when it is not (displayed in any other class) and
they seem to be identical.
So, I am at a loss, and I would appreciate any advice you might give.
I can send any code you think would prove useful, but for now I am
sending you the class where I am trying to call the window, and the
contents of the window's code-behind.
Thank you for any guidance you can give.
Johnnie Odom
Network Services
School District of Escambia County
****************
The function from the calling class:
public string radiazerMain(string radiazerGroup, string
radiazerProfile){
Progression MarathonBar = new Progression();
MarathonBar.Show();
string monologger = "";
string lastLine = "Radiazer completed current run." +
Environment.NewLine;
Array usersToModify = getGroupMembers(radiazerGroup);
string[] radiusAttribs = new
string[]{"dialupAccess","radiusArapFeatures","radiusArapSecurity","radiusArapZoneAccess","radiusAuthType","radiusCallbackId","radiusCallbackNumber","radiusCalledStationId","radiusCallingStationId","radiusCheckItem","radiusClass","radiusClientIPAddress","radiusExpiration","radiusFilterId","radiusFramedAppleTalkLink","radiusFramedAppleTalkNetwork","radiusFramedAppleTalkZone","radiusFramedCompression","radiusFramedIPAddress","radiusFramedIPNetmask","radiusFramedIPXNetwork","radiusFramedMTU","radiusFramedProtocol","radiusFramedRoute","radiusFramedRouting","radiusGroupName","radiusHint","radiusHuntgroupName","radiusIdleTimeout","radiusLoginIPHost","radiusLoginLATGroup","radiusLoginLATNode","radiusLoginLATPort","radiusLoginLATService","radiusLoginService","radiusLoginTCPPort","radiusLoginTime","radiusPasswordRetry","radiusPortLimit","radiusProfileDn","radiusPrompt","radiusProxyToRealm","radiusRealm","radiusReplicateToRealm","radiusReplyItem","radiusServiceType","radiusSessionTimeout"
,
"radiusSimultaneousUse","radiusStripUserName","radiusTerminationAction","radiusTunnelAssignmentId","radiusTunnelClientEndpoint","radiusTunnelMediumType","radiusTunnelPassword","radiusTunnelPreference","radiusTunnelPrivateGroupId","radiusTunnelServerEndpoint","radiusTunnelType","radiusUserCategory","radiusVSA"};
LdapAttributeSet profileTemplate =
LdapAttributeSetFiltered(radiazerProfile, radiusAttribs);
profileTemplate.Add(new LdapAttribute("radiusProfileDn",
radiazerProfile));
int totalUsersCount = usersToModify.Length;
int currentUserCount = 0;
int errorCount = 0;
MarathonBar.Show();
foreach(string userToModify in usersToModify){
currentUserCount++;
try{
monologger = monologger + radiazeModifyUser(userToModify,
profileTemplate);
}
catch(LdapException LdapFailure){
monologger = monologger + "User " + userToModify + " failed. Error
is " + LdapFailure.ToString() + Environment.NewLine;
errorCount++;
}
if(((currentUserCount % 10) == 0) || ((totalUsersCount -
currentUserCount) < 10)){
MarathonBar.setProgress(((double)currentUserCount /
totalUsersCount), totalUsersCount , currentUserCount, errorCount,
userToModify);
}
if(MarathonBar.cancelFromUser){
lastLine = "Radiazer cancelled by user." + Environment.NewLine;
break;
}
}
MarathonBar.Destroy();
monologger = monologger + lastLine;
return monologger;
}
*************
The Code-Behind:
using System;
namespace Radiazer2
{
public partial class Progression : Gtk.Window
{
public bool cancelFromUser = false;
public Progression () :
base(Gtk.WindowType.Toplevel)
{
this.Build ();
}
public void setProgress(double fractionOfProgress, int totalUnits,
int finishedUnits, int errorUnits, string finishedUser){
this.progressIndicator.Fraction = fractionOfProgress;
this.progressIndicator.Text = "Completed " + finishedUnits + " of "
+ totalUnits + " with " + errorUnits + " errors. Current user is " +
finishedUser + ".";
}
protected void OnStopUserClicked (object sender, EventArgs e)
{
cancelFromUser = true;
}
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