Today, I started development of a collapsible frame Qt widget. I needed a widget that could show/hide its contents by clicking on an open/close button but couldn't find a solution online so I decided to create my own. The code is still a work in progress, but the basis of the code involves the use of nested layouts to achieve the hide/show effect. I had to write a custom clickable label class and subclass QLabel as QLabel doesn't have a clicked() signal. I'm using style sheets to apply the icon to the QLabel so that it has the correct image based on open/close and hover over states. The code is available on github under the Apache 2.0 license. Feel free to check out the code and see if you'd like to fork it yourself and contribute.
https://github.com/pcmantinker/Qt-Collapsible-Panel
I've been working on a cross-platform notification system built on Qt which is modeled after Mac OS X's Growl notification system. This is for use in a project that I'm currently working on. You may view the source code here: https://github.com/pcmantinker/Tray-Notification-System
I am still playing around with the window flags for the notification system as sometimes when a new notification is shown, within the Windows operating system, it steals focus from full screen applications. If you have any suggestions, feel free to let me know in the comments. Also, feel free to clone my repository and contribute to the code base if you're interested.
I've been working on some code using the QtSDK lately and I've been researching how to deploy applications for Mac OS X 10.6 and above. Luckily, it's pretty simple to deploy applications as the QtSDK includes a tool called macdeployqt. The tool copies all required Qt frameworks to the app bundle and re-assigns the library reference paths for the app to use the libraries within the app bundle and not the user's system directory (/usr/lib). It doesn't copy 3rd party libraries that aren't in the /usr/lib directory so you will have to manually add those.
Please note that macdeployqt on Qt 4.7.x doesn't seem to assign the correct library paths when linking against QtWebKit. This is a known bug that was fixed in Qt 4.8.0.
Also, if you want to insure that your app will not have problems on Snow Leopard, be sure to add this to your .pro file:
macx:QMAKE_MAC_SDK=/Developer/SDKs/MacOSX10.6.sdk
This tells Qt to use the Snow Leopard SDK instead of the Lion SDK. If you build your application with the 10.6 SDK, it will work with Mac OS X 10.6 or higher.
One last thing is that there seems to be a problem with Xcode 4 and Qt Creator not being able to find g++-4.2 which is installed with older versions of Xcode. A work around for this until a new version of Qt Creator:
sudo ln -s /usr/bin/g++ /usr/bin/g++-4.2
sudo ln -s /usr/bin/gcc /usr/bin/gcc-4.2
I hope this helps anyone experiencing the same issues.
EDIT:
As of the February 1, 2012 QtSDK update, it appears as though the problems with g++ and using macdeployqt have been fixed. Please be sure to update to the latest SDK release.