I'm having trouble understanding how QGraphicsItemAnimation's setScaleAt function works. Here's the code I'm using: QGraphicsItem *item=scene.addEllipse(400, 300, 100, 100, QPen(), QBrush(Qt::SolidPattern)); QTimeLine *timeline=new QTimeLine(3000); timeline->setFrameRange(0, 100); QGraphicsItemAnimation *animation=new QGraphicsI...
Hello, i'm working in Linux [GCC Compiler] , i'm using Eclipse with CDT + QT to compile I need to display sequence of DICOM images using QT window and OpenGL functions pls let me know which is the function to display sequence of images i'm using 3 functions 1) initiallizeGL() to initallize OpenGL functions. 2) resizeGL() instead of g...
I'm writing my first proper useful piece of software. Part of it will involve the user viewing an image, and choosing to accept or reject it. Doing this will cause the image to be saved to an accepted or rejected folder, and possibly rotated and/or resized. At the moment, my rotate/resize/save operation is pausing execution of my progra...
Please tell me what is the QT equivalent function for glutswapbuffers().. ...
In my application I have QGraphicsScene with pixmap added and all is viewed in QGraphicsView with scrollbars off. The program window is smaller then pixmap and when I press arrow keys or move mouse wheel the pixmap is being moved. How do I disable that so even if the pixmap is bigger than window it won't be moved by keyboard or mouse un...
I'm adding OpenGL support to a game that is based on Qt 3 (office politics). The basics (QGLWidget, etc) work fine. To get to OpenGL extensions, I arbitrarily chose GLee (it compiled out of the box, GLew didn't). GLee.h and qgl.h don't play nicely together. AFAICT, each must be included before the other. I yanked the preprocessing ch...
I am trying to determine when the main window of my application has been moved. The main window is a standard QMainWindow and we've installed an eventFilter on the QApplication to look for moveEvents for the QMainWindow, but none are being triggered. For a variety of reasons, subclassing the QMainWindow isn't really an option. Any thoug...
This is a question about Qt library, not about Web design. For QLabel and other controls I can set HTML text, for example "<h3>Some Text</h3>". The question is: where is the default HTML style is defined? How can I find out what a font would be used for <h3> tag? The next question: can I change the default HTML style? Edit: I want to ...
I have the following code that I am trying to extract the systems proxy settings from: QList<QNetworkProxy> listOfProxies = QNetworkProxyFactory::systemProxyForQuery(); foreach ( QNetworkProxy loopItem, listOfProxies ) { qDebug() << "proxyUsed:" << loopItem.hostName(); } I only get one item back and with a blank host name. Any ideas...
I am developing cross-platform Qt application. It is freeware though not open-source. Therefore I want to distribute it as a compiled binary. On windows there is no problem, I pack my compiled 'exe' along with MinGW's and Qt's DLLs and everything goes great. But on Linux there is a problem because the user may have shared libraries in ...
Hi! I'm working on a little project for college, and I need to model transmission over network, and to impment and visualize different sorts of error correction algorithms. My improvized packet consists of one quint8: I need to convert it into a bit array, like QBitArray, append a check bit to it, trasfer it over UDP, check the success o...
I am trying to us Qt to access a website and download updates, the problem is that one install base is using a Microsoft ISA proxy server which requires authentication. Qt gives me a function to supply a username and password: http://doc.trolltech.com/4.5/qnetworkaccessmanager.html#proxyAuthenticationRequired However other applications...
I need to check if my Qt GUI application is already running in the current X session. That is, I want to forbid running several instances of it. But running several instances by different users or by the same user on another (i.e. remote) X server should be allowed. How can this be done? Thank you. ...
I've had no luck getting the rbuic UI compiler (from qt4-qtruby-1.4.10 release) to produce any output on windows. Even running rbuic -h does not work. I'm guessing the output is going somewhere other than stdout... Any suggestions? ...
Hello, I am using the QPropertyEditor from Qt-Apps.org. is it possible to create a class with exposed Properties where the amount of properties is runtime-dynamic? So for example you have a class which represents a vector of floats with an arbitrary length which is not known at compile time. So you have a vector<float> myFloats; as ...
In a kde3 game called ksirtet (a tetris clone) when playing against a computer the human player cannot move the tetris piece left/right. I'm trying to fix it but cannot debug in gdb. After the line "kapp->exec()" gdb stops responding, the game runs and I cannot input any command do gdb to see what's going on. So the question is about deb...
I've successfully added an C++ object to a QWebFrame with addToJavaScriptWindowObject, and can call a slot on that object from javascript. But what I really want to do is have one of those slots return a new object. For example, I have a slot like this, which returns a QObject derived class instance: MyObject* MyApp::helloWorld() ...
I'm starting a C++ project using OpenGL and Qt for the UI in eclipse. I would like to create a UI where a portion of the window contains a frame for OpenGL rendering and the rest would contain other Qt widgets such as buttons and so on. I haven't used Qt or the GUI editor in eclipse before and I'm wondering what the best approach would...
What is the best way to exit out of a loop as close to 30ms as possible in C++. Polling boost:microsec_clock ? Polling QTime ? Something else? Something like: A = now; for (blah; blah; blah) { Blah(); if (now - A > 30000) break; } It should work on Linux, OS X, and Windows. The calculations in the loop are for up...
I'm writing my first Qt application with PyQt and am having some trouble creating a custom list view. I'd like the list to contain arbitrary widgets (one custom widget in particular). How would I go about this? It seems that the alternative would be to create a table or grid view wrapped in a scrollbar. However, I'd like to be able t...