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• Basic compile issue with QT4

  - by Cobus Kruger

  I've been trying to get a dead simple listing from a university textbook to compile with the newest QT SDK for Windows I downloaded last night. After struggling through the regular nonsense (no make.bat, need to manually add environment variables and so on) I am finally at the point where I can build. But only one of the two libraries seem to work.…

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• QLocalSocket and QLocalServer in browser plugins

  - by kambamsu

  Hi, I have a simple doubt. Does the ipc mechanism in qt work when we use it for developing browser plugins? The reason i ask this is that I can easily get the QLocalSocket and QLocalServer communication to work in a qt application, but when i write a similar piece of code in a browser plugin dll i see that the server does not accept a new…

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• Carbon, LSUIElement, and showing a window

  - by James Turner

  I have a Carbon LSUIElement application, which runs in the background (possibly with an icon in the menubar, depending on a pref) and occasionally needs to show a dialog to the user - sometimes in response to a user event, but sometimes in response to a background task failing or similar. (I'm using Qt 4.5, so the application is Carbon…

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• How can i iterate through QListWidget items and work with each item?

  - by Hossein

  In CSharp its as simple as writting : listBox1.Items.Add("Hello"); listBox1.Items.Add("There"); foreach (string item in listBox1.Items ) { MessageBox.Show(item.ToString()); } and i can easily add different objects to a list box and then retrieve them using foreach. I tried the same approach in Qt 4.8.2 but it seems they are…

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• A generic C++ library that provides QtConcurrent functionality?

  - by Lucas

  QtConcurrent is awesome. I'll let the Qt docs speak for themselves: QtConcurrent includes functional programming style APIs for parallel list processing, including a MapReduce and FilterReduce implementation for shared-memory (non-distributed) systems, and classes for managing asynchronous computations in GUI applications. …

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• Cannot press QPushButton in a simple program

  - by shadyabhi

  Basically, I want a simple pushButton with a colorful text which when pressed exits the application. Why cant I press PushButton in this simple program. I am using QT 4.6 on Arch x86_64. #include <QtGui/QApplication> #include <QLabel> #include <QPushButton> #include<QtGui> int main(int argc, char…

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• Architecture for Qt SIGNAL with subclass-specific, templated argument type

  - by Barry Wark

  I am developing a scientific data acquisition application using Qt. Since I'm not a deep expert in Qt, I'd like some architecture advise from the community on the following problem: The application supports several hardware acquisition interfaces but I would like to provide an common API on top of those interfaces. Each…

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• How to generate .sln/.vcproj using qmake

  - by stas

  Hi! I have main.cpp in c:\test folder and do the following: qmake -project qmake -tp vc test.pro The answer is: WARNING: Unable to generate output for: C:/test//Makefile.Debug [TEMPLATE vcapp] WARNING: Unable to generate output for: C:/test//Makefile.Release [TEMPLATE vcapp] But, I don't need make files. I need…

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• Building using CMake-GUI

  - by goodwince

  I am trying to build Marble on Windows (XP) and have been extremely unsuccessful. Following the instructions written here. I am wanting to build it as QT only. Configuration of the build tree fails. I am using the cmake-gui since I have never tried to compile using cmake it's possible it could be something in there. …

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• Very slow remote page load performance in QtWebKit (Windows)

  - by Gil

  I get very slow load times on QtWebKit on Windows 7, through ADSL. I am using the Qt Demo Browser, on a Core2 Quad, 64 bit Windows 7, 4GB ram, 2gb processor. through a VPN. Simplest example: google search page takes ~18 seconds to load, compared to 2.5 on Chrome (cash cleared). On larger pages, with scripts etc. it…

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• Why is QProcess converting the '=' in my arguments to spaces

  - by dagorym

  I've run into a weird error with a Qt program running on Windows. The program uses QProcess to spawn a child process wit two arguments. The program and arguments passed to the QProcess::start() method are of the form: "batchfile.bat" "--option1=some_value" "--option2=some_other_value\with_a\path" For some…

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• Any really modern, good-looking desktop apps that are developed with PyQt/PySide?

  - by Edwin

  Hi, I have started using Python for web development recently, it's kinda cool; I have seen programs that are developed in QT/C++, which is good enough in terms of esthetics; I have just noticed the new PySide project (which brings LGPL Qt license to Python and it doesn't support Windows yet). In view of the…

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• will destroyed() be emitted if the constructor of a class derived from QObject throws?

  - by PorkyBrain

  Ive seen Qt GUI syntax like the following all over the place: myDialog::myDialog(QWidget *parent, Qt::WFlags flags):QDialog(parent, flags) { QPushButton *button = new QPushButton("&Download", this); QVBoxLayout *layout = new QVBoxLayout(this); //something that can throw here layout…

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• QT: I've inherited from QTreeView. I've inherited from QStandardItem. How do i Style the items?

  - by San Jacinto

  My Google skills must be failing me today. I've inherited from QTreeView to create a TreeView that stores a QStandardItemModel instead of a QAbstractItemModel. I have also inherited from QStandardItem to create a class to store my data in an item as is necessary. I've successfully inserted my derived…

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• CalcliX Using Qt OpenGL

  - by user363093

  I have a problem whille executing my program in qt,that,this canot reload.....please HELP me

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• Give labels in Qt Forms

  - by Ann

  How can I set a label in Qt Ui forms.

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• Normal C++ code in Qt doesnt build and run

  - by Nick

  Hello. I am using Qt under linux, if it matters. I ran successfully under Geany (a simple c++ compiler) the following: //my first program in C++ Hello World! include using namespace std; int main () {cout << "Hello World!"; return 0;} I opened Qt source file and copied the exact same code…

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• Program exit code -SomeNumber

  - by JohnnyLongPants

  i made a program using Qt for Symbian, its all working very well ... However, it always exits with a status code -10737something when i close the program i think the problem is in the deconstructer, maybe some memory leaks ... any suggestion on how to solve this problem, or to find the error using Qt…

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• Code for making a frame for wumpus world game

  - by priya verma

  hii. i am fresher about qt4.3.2 platform.i have a project to make a wumpus world game using c++ and QT.i have a little knowldge about qt.so provide me a code for a frame of wumpus world game in qt4.3.2 platform.

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• QListView how to add column ?

  - by Samir

  How can I add columns to QListView control. Found a method addColumn while seardhing, but in my Qt Creator 1.2.1 based on Qt 4.5.2(32 bit) QListView doesn't have such method at all !!! So how would I add columns ? Say I have 3 columns then what is the code to add a row ?

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• Custom painting QMainWindow title bar

  - by Catalin Piti?

  Does anybody know how can I customize title bar of a main window in QT? I would like to make some custom painting over the "normal" drawing. The QT version I'm interested in is 4.5 or 4.6 (beta)

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• Container item implementation

  - by onurozcelik

  Hi, I am working in Train Traffic Controller software project. My responsibility in this project is to develop the visual railroad GUI. We are implementing the project with Qt. By now I am using QGraphicsLinearLayout to hold my items. I am using the layout because I do not want to calculate…

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• How to choose which Network interface to use?

  - by ShaChris23

  I use Qt for my TCP communication. If my PC has 2 network interfaces (say eth0, eth1), and say I want to explicitly use eth1, how do I do that in Qt?

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• win32:libs undefined reference

  - by hector

  I want to link a .lib in my Qt project and I get an error about an undefined reference to vhtIOConn::getDefault(vhtIOConn::DeviceType). I have already added the following specifications to the .pro file: ###################################################################### # Automatically…

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• jamvm1.5+classpath-0.96+qt4.3 QPixmap: It is not safe to use pixmaps outside the GUI thread

  - by user324118

  jamvm -Dawt.toolkit=gnu.java.awt.peer.qt test QPixmap: It is not safe to use pixmaps outside the GUI thread I'm new in QT ,I don't know how to deal with it.

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