I am currently creating a program in Qt, OpenCv, Mac os X. I have a main window, and then a separate window that is opened. I pass the new window several matrix clones in the constructor: ImageWindow *imageWin = new ImageWindow( cvCloneMat(getData->getMasterRawMat(1)), cvCloneMat(getData->getMasterRawMat(2)), cvCloneMat(get...
I use QT 4.4.2 in Visual Studio 2008. When I am writing code, IntelliSense seems to die - it does not show any methods or data members in QT objects such as QPushButton, does not see the QObject::connect static method, etc. Is it a typical situation or did I do something wrong while installing the library? ...
I've been using QT for a while now and I've been wondering about something regarding the way the GUI is painted in Windows. Is it really painting all the buttons, edit boxes, combo-boxes, check-boxes, tabs etc' on its own using QPainter or is it somehow using the native widgets? The fact that it can do custom styling and skinning sugg...
I'm looking for a way to preserve the size of windows in a Qt app. I've seen that there is the possibility of using the following method for every widget: saveGeometry() But really, I don't find this a satisfactioning method. Is there something like setAutosaveGeometry(True)? I'm especially looking for a way to store the widths of t...
How do I get Qt to print a complete dialog or window? I could dump the window contents with an external program like xwd and print that, but I would prefer to do it all with Qt. ...
I have a Qt project which I have had a debug console displayed whilst I am developing, I am about to ship the product to I removed the qmake console command: CONFIG += console However when I do that I get the following error: link /LIBPATH:"c:\Qt\4.5.0\lib" /NOLOGO /INCREMENTAL:NO /LTCG /MANIFEST /MANIFESTFILE:"./_obj/win32\Lynx.interm...
I am parsing a xml file with QXmlDefaultHandler like this: void Parser::ParseFilename(const char* pFilename) { LOG_DEBUG("Parser::ParseFilename(%s)", pFilename); ClearState(); m_inputFile.setFileName(pFilename); QXmlInputSource source( &m_inputFile ); QXmlSimpleReader reader; reader.setContentHandler( this ); reader.pars...
I'm learning Qt, found this: Widget::Widget(QWidget *parent) : QWidget(parent), ui(new Ui::WidgetClass) { ui->setupUi(this); } what is ": QWidget(parent), ui(new Ui::WidgetClass)" mean? And how can I get the C++ document about this? ...
I'm using only Qt (though PyQt) and I don't get icons when I call e.g. QMessageBox.warning(). Is there a way to use the platform's default icons? Currently I'm using the more complete QMessageBox constructor and calling setIconPixmap. ...
I'm trying to input data from an XML file in a C++ program using the Qt tool kit. My XML data is formatted as follows: `<item> <title>title<\title> <tree_loc1>0<\tree_loc1> <parent>parent<\parent> <description>description<\description> <other_info>other info<\other_info> <location>location<\location> <last_mo...
Where can I find a Qt tutorial in PDF format. I have looked all over google but can't find one. I need to be able to read it offline as I can't always be on the internet. Thanks! ...
I have a QT dialog application. Now I dont want that dialog to be resizeable. I am not sure how to achieve this. I tried a bunch of things but still when the dialog launches this dialog can be resized. What is the property that i should set to disable the dialog/Widget resize. I also tried setSizePolicy(QSizePolicy::Fixed); But i g...
Hi all, I want to allow users to pick a font but the size they choose will have no effect. So it would be best to have that part of the dialog disabled. Is this possible? Thank you! ...
linux: $HOME/.config windows: %APPDATA% mac os: $HOME/.config It can be set using http://doc.trolltech.com/4.4/qsettings.html#setPath, but it seems as I am not able to retrieve it. http://doc.trolltech.com/4.4/qlibraryinfo.html#location QLibraryInfo::LibrariesPath returns the system wide settings dir, which is not what I want. Any i...
Hi to all I'm wrtiting a C++ application with Trolltech QT Library and I need to capture video stream from a camera and some medical instrumentations. What kind of hardware can I use to do this? I've tried with OpenCV but it doesn't recognize my EyeTV 250. Can I use Pinnacle Video capture for Mac? thanks, Andrea ...
Is there a quick, straightforward way to make a Qt application into an executable? I attempted to follow the instructions at http://doc.trolltech.com/4.1/deployment-windows.html but have been unsuccesfull thus far; I'm unable to Any help would be much appreciated. Thanks! ...
I downloaded and installed qt evaluation for vs2008 and expect it to be integrated with VS, but it is not. It is trial 30 days commercial license. What`s wrong with it or may be I got it wrong? ...
I know they announced in February that it was going to transition to a community-developed model over the next year... but right now, I can't find it on their website, at all, let alone version 4.5 that was supposed to be released this month. I am about to embark on the GUI portion of a major project, and while I had considered using QT...
I have started learning Qt recently. I did not get quite clear how can I paint using QPainter class. Let`s say I want just to place a few points in the window: class PointDrawer: public QWidget { Q_OBJECT private: QPainter p; public: PointDrawer(QWidget* obj=0): QWidget(obj), p(this) {} virtual void paintEvent(QPaintEv...
Ok so I've got a QGraphicsScene in a class called eye. I call a function: void eye::playSequence(int sequenceNum) { for (int i=0; i<sequences[sequenceNum].numberOfSlides(); i++) { presentSlide(sequenceNum, i); time_t start; time(&start); bool cont=false; while (!cont) { time_t now; time(&n...