Author: Matthias

Qt designer bug

Step 1: Start Qt Designer. Open your form. Qt designer hangs. Kill that stuff.
Step 2: Restart, but open another form. Qt Designer works just fine.
Question your sanity and repeat step 1 to see whether the hanging was just a glitch in the Matrix. Be stumped to see that it hangs again.
(Possible extension: create your favorite permutational combination of step 1 & 2 and repeat into infinity 😉 )

If this scenario seems familiar to you, then certainly read on…

Remember my little QtWorkbench issue I blogged about? Well, it seemed, the story got a tail too (that’s why I had to blog that first before I could say this =)).

During my struggle for correct compilation, I had modified the windowModality flag of my QMainWindow to Qt::Modal, in a desperate attempt to guide my app into the “Right Thread”. 😉
If I had modified that flag at any other point, I would have noticed the problem immediately, but being preoccupied with my QFtp thread problem at that time, I never went back to Designer and didn’t notice..
I know, it’s a stupid of me, but I still think it’s kind of a bug in Qt Designer. If you shouldn’t change the window modality of a main window, then they shouldn’t let you. 🙂 Moreover, you can’t change it back since as soon as you open your form, the form gets simulated in real-time and the dead-lock occurs. Or maybe even eventloop hijacking, sounds more l33t. 😛
Luckily, the gui is stored in plain XML, so you can just delete that section and you’re all set.

Mobistar on the road

One of the first things I tried when I got my cell phone, was using it to connect my laptop to internet. We happened to be on vacation in the middle of nowhere (which Limburg is to most Belgians 😉 ) so it was the ideal situation to try out my brand new GPRS subscription. 🙂 I had no idea where to start, let alone which proxy servers etc to configure. Surprisingly enough, I actually managed to find some info through the Orange World portal (which I first had to enable an account for) which, combined with some info I found on the internet with the clumsy built-in browser, enabled me to connect my Opera browser to the internet, yay!
I used the Mobile Network Wizard that came with the rest of the Sony Ericsson tools. I needed my data cable back then, but figured this was only a matter of configuration to get it going over bluetooth.
Continue reading Mobistar on the road

IDE wars: the battle for Qt

In my search for the best open source Qt-compatible IDE (for Windows, as for Linux, you don’t have to search ;)), I eventually settled with Code::Blocks. Don’t ask me why anymore, it’s been too long. 🙂 (I do remember testing QDevelop and Qtclipse). But if you have a look at CB, you will see it for yourself: a very stable, clean and versatile IDE. Qt support comes in the form of an (unofficial) plugin: QtWorkbench.

First of all, getting this plugin to work was REALLY a PITA (It involved compiling CB from SVN which was a challenge on it own), but very recently the author seems to provide some binaries which should make the experience all the more pleasant. 🙂 I was so happy when I first got it running, that I really didn’t care about half a dozen plugins being lost in the build process. 😉 (I never took it up again, who needs plugins? 😛 ;)) What’s more, code completion just worked and QtWorkbench created my .pro file all by itself.

After the honeymoon moment was over, I really got some nasty trouble though. Compiling debug simply did not work because apparently I don’t have the Qtdesignerd.dll and QtW insists on including it in the project file. So let’s remove it outside the autogenerated block like this:

CONFIG -= designer

Okay, first hurdle taken. Another hurdle was unfortunately a whole less obvious.
Continue reading IDE wars: the battle for Qt

which php.ini?

ok, so you need to modify php.ini to change some php setting but you’re on this ill-managed cpanel server having like tens of them.. So which one is the active one? 🙂
Just ask php itself 😉 :
php -i | grep php.ini