General and Desktop

Yes, usually you have a worker thread that does something (interact with the network, calculate something, etc.) and have it signal updates to the UI thread (incl. required information if copying them is not too costly or otherwise some handle to retrieve the relevant data) and then have it update the UI accordingly. This is "fire and forget": The worker fires a signal and then proceeds as normal. The receiver is responsible for making sure it is acted upon. There is no need to block the worker thread while the UI is updated. Of course you only signal when something actually happened. If you need to block the worker thread because you need feedback from the UI which can't be done via signals emited by the UI thread then you might be better of not have a worker thread in the first place. You can always use event-driven programming to asynchronously process network requests, etc. which will also keep your UI responsive.

You just saving me! Thanks you =)

@QWidget *widget = this->taskListTableView->cellWidget(row, 1);@ this is not correct, first u initialize your qwidget object like this.... @QWidget *widget =new QWidget(this);@ just try this...

wow, thank you very much for the detailed answer! I'll look into it.

Hey there, I think you need to use shaders and anti-aliasing to avoid such distortion. Such simple code doesn't produce clear objects. Notice that in the original texture you have a very obvious gradient in the colours. If you wan't to be sure that this is the cause of the problem, resize your window so that you could make it fill the screen and use more than 1000x800 pixels. If you find this problem only on the edges of the objects, then you need to use, as I said, some filtering for the scene. I think you gotta have a good OpenGL course to get over this and understand how to deal with 3D objects being sampled. Many courses are available online. Regards.

I think you are looking for monitoring the [[doc:QHoverEvent]].

Is this question by any means related to "this thread":/forums/viewthread/14623/?

Thanks for the insight! Im current trying to figure out why my app goes boom (newbie programmer) and I did not realize that about QMetaObject::InvokeMethod.

I think the list for this year is still not published. Last year, there definitely was a lot of projects available from KDE, I think VLC was also in.

Maybe I should clarify a bit. I'm making my dropdowns so they mouseover a dark red fading to transparent, white text, and a black background. Now the problem I'm having is the black background part isn't working. The white text, red fade to transparent works, just.. No black. I've tried hex colors, black background image, none of it's working..

Ha! It's always the things that "are correct for sure" that bite you! Turns out just printing "Yey!" wasn't so smart, the parameters I passed to dataChanged were wrong and so the filter proxy didn't let the signal through. I emitted like this: @emit dataChanged(index(id, 0), index(id, columnCount()));@ When I should have emitted @emit dataChanged(index(id, 0), index(id, columnCount()-1));@ Obviously ;) Sadly this "column out of bounds" situation doesn't produce any qDebug output in the model or view, but is silently turned into column id -1 and row id 0 (!). Sneaky.

You can set the eventFilter for the child widget to the parent, and filter out the event.

You need to backslash escape " your quotes around the font name, perhaps?

I have noticed that myself, some people simply cannot figure out what to look for, I myself googled "firefox extension api c++" - API stands for Application Programming Interface. I suggest you work on your English parallel on your programming, since English is kind of crucial - most programming resources are in English. Good luck with your extension.

Thanks Volker for your answer. I'm trying to create this backup using osql.exe application that is delivered with MSDE2000 and QProcess. Here's the code snippet: @ QProcess *dbBackupProcess = new QProcess(); QStringList args; args << "-Uuser" << "-Ppassword" << "-Sdomain\SQLinstance" << "-Q "BACKUP DATABASE dbName TO DISK = 'E:\backupName.bak'""; dbBackupProcess->start("osql.exe", args); @ This unfortunately doesn't work. What am I doing wrong? Below command ran from the command prompt works good: @osql.exe -Uuser -Ppassword -Sdomain\SQLinstance -Q "BACKUP DATABASE dbName TO DISK = 'E:\backupName.bak'"@ Edit: Okay, never mind. I'm finally getting somewhere. Will post an update soon. Edit#2: I guess I solved it: @ QString command = "osql.exe -UuserName -Ppassword -Sdomain\SQLinstance -Q "BACKUP DATABASE dbName TO DISK = 'E:\backupName.bak'""; int exitCode = QProcess::execute(command); @

Thanks; the argc reference was indeed the case - missed it.

Thanks. You save my day.

Even i tried with all exitstatus, but no luck. Finally i have used a batch file with WMIC command inside the batch file. now its working fine. @ QProcess *process = new QProcess(); process->start( "executer.bat" ); // which contains WMIC Path Win32_COMPUTERSYSTEM get Manufacturer,Model /FORMAT:list process->closeWriteChannel(); if( process->waitForFinished() ) { qDebug() << "Succeed: "; QString sResult = QString( process->readAllStandardOutput() ).trimmed(); process->close(); if( !sResult.isEmpty() ) return sResult.split("\n"); } else { qDebug() << "Failed: " << process->errorString(); process->close(); return QStringList(); } @