I have experience writing console and network client/server apps in C and C++, but I know next to nothing about using the win32 visual API, MFC, QT, WxWidgets, etc. Where is a good place to start, and what method should I specialize in, so as to be future ready and robust?...
I'm working on bringing some old code from 1998 up to the 21st century. One of the first steps in the process is converting the printf statements to QString variables. No matter how many times I look back at printf though, I always end up forgetting one thing or the other. So, for fun, let's decode it together, for ole' times sake and...
All, I've been tasked with updating a series of applications which are performance critical VB.NET apps that essentially just monitor and return networking statistics. I've only got three requirements: convert it to C#, make it fast, and make it stable One caveat is that we "may" migrate from a .NET platform to linux "soon" I will be ...
I am running a Qt 4.5 commercial snapshot and want to use a plugin that i downloaded (it's a .so file) in my QWebView. Is there a specific location where I need to place this file? Can I grab it using the QWebPluginFactory? ...
What's the best way to use QT4's QItemDelegate to show thumbnails for images in a view? Specifically, how do you stop the item delegate from blocking when generating pixmaps from very large image files (> 500MB)? Can anyone link to some example code that achieves this? Then again, perhaps this isn't the place to look for Qt-specific c...
Hi I have a large exiting C++ project involving: 4 applications 50+ libraries 20+ third party libraries The project uses QMake (part of Trolltech's Qt) to build the production version on Linux, but I've been playing around at building it on MacOS. I can build in on MacOS using QMake just fine but I'm having trouble producing the fi...
Hi, We currently maintain a suit of MFC applications that are fairly well designed, however the user interface is beginning to look tired and a lot of the code is in need quite a bit of refactoring to tidy up some duplication and/or performance problems. We make use of quite a few custom controls that handle all their own drawing (all ...
Is there a way to specify a child's initial window position in Qt? I have an application that runs on Linux and Windows and it looks like the default behavior of Qt lets the Window Manager determine the placement of the child windows. On Windows, this is in the center of the screen the parent is on which seems reasonable. On Lin...
Hey there I've been trying to compile the latest Qt 4.x but it does not include some of the X11 header files that my application needs. I have also tried to compile the 4.3.x (under mac os x 10.5)version of Qt to include the x11 libraries but the compilation fails.Any one else having problems with the Qt X11 packages for Mac OSx ...
I come from a Java background, where packages are used, not namespaces. I'm used to putting classes that work together to form a complete object into packages, and then reusing them later from that package. But now I'm working in C++. How do you use namespaces in C++? Do you create a single namespace for the entire application, or do yo...
Does any one know how the event handler manages the posted events? In my app i have two threads(1:guiThread and 2:computationThread). After an exception is thrown I call postEvent(..)to an existing dialog. The Qt-Event-Handler holds this one back until the dialog is closed. ...
I had an idea for a plug-in for my favorite program runner Launchy, however after downloading the source code I found that it makes heavy use of the Qt library. The bulk of my experience is in C# and PHP and until that moment I had never really even heard of this library. Which leads me to ask, does anyone have any impressions of it ...
Trying to honor a feature request from our customers, I'd like that my application, when Internet is available, check on our website if a new version is available. The problem is that I have no idea about what have to be done on the server side. I can imagine that my application (developped in C++ using Qt) has to send a request (HTTP ...
I'm about to start on a large Qt application, which is made up of smaller components (groups of classes that work together). For example, there might be a dialog that is used in the project, but should be developed on its own before being integrated into the project. Instead of working on it in another folder somewhere and then copying i...
Hi, I need to determine when my Qt 4.4.1 application receives focus. I have come up with 2 possible solutions, but they both don’t work exactly as I would like. In the first possible solution, I connect the focusChanged() signal from qApp to a SLOT. In the slot I check the ‘old’ pointer. If it ‘0’, then I know we’ve switched to this...
Has anybody experience in building a custom style in Qt? What I have in my mind is a complete new style that affects all kind of widgets. I have seen some examples in the web for a custom combo box. But I have no idea how much time and code it takes to build a "complete" new custom style ... maybe someone can give me a hint. We think of...
Most of the work being done at my company is QT-based C++, and it's all checked into a Subversion repository. Until now, all work on the codebase has been done purely with nano, or perhaps Kate. Being new here, I would like to take advantage of setting up Eclipse -properly- to edit my local copy of the tree. I have the CDT "version" of E...
If you had a differential of either venturing into Delphi land or Qt land which would you choose? I know they are not totally comparable. I for one have Windows development experience with Builder C++ (almost Delphi) and MFC (almost Qt), with a bit more time working with Builder C++. Please take out the cross platform ability of Qt in yo...
Does anyone have details in setting up Qt4 in Visual Studio 2008? Links to other resources would be appreciated as well. I already know that the commercial version of Qt has applications to this end. I also realize that I'll probably need to compile from source as the installer for the open source does not support Visual Studio and inst...
I have a QMainWindow in a Qt application. When I close it I want it to store its current restore size (the size of the window when it is not maximized). This works well when I close the window in restore mode (that is, not maximized). But if I close the window if it is maximized, then next time i start the application and restore the app...