[qt] Forum Topics

Hello There, I am currently making a small game in c++ and Qt. In the game, an npc call's the Wander() function which makes it randomly wander around. However, only one of these npc's can call the Wander() function at any one time - Is there a way around this? …

in this program i'm writing the functions that have qt classes as parameters Qlabel, QSpinbox, etc. are causing compile errors, my other functions work fine i get the same 2 errors for each QT object i use as an argument this is the function definition that uses QT classes as …

can you give me a very simple qtwebkit example that explain how it works and how to use it?

Installing Eric4 on Windows 7, 32 Bit; using MS VS C++ 2010 After much ado and trial-and-error I was able to get it installed, via the following steps: Command-prompt run as administrator in all cases All packages installed in the root of C:\ After changing each environment variable, update command-prompt …

Hey guys, I'm trying to move data by clicking on a QPushButton from one QTreeView in the second QTreeView. Do you know how to do this. I know that I have to connect the QPushButton with a method which makes this possible. I don't really know how this method looks …

Am I correctly including all the library files from the directory ?? LIBS += `"C:\openCV24\opencv_bin\lib\*.dll"` Because this line keeps on giving me `C:\openCV24\opencv_bin\install\lib*.dll: Invalid argument` Ive tried looking several places and have altered this line many times but cant seem to get it to work. Can someone please let me …

I have a class orders which has its instanced stored in a QMap/Map and has a Key:int, value:order pattern. Everything went fine until I started iterating through the map and accessing the functions of the class.First I was trying to print out the order objects values using it's getter methods …

Ive got a basic Qt console application whcih write and then reads back an xml document.I have compiled and ran this without any compilation errors, however for some reason it keeps returning an error code and then wipes clean the actual xml document ??? Can someone please explain why it …

I am using C++/Qt4.3.0.Here I am exporting an html report to .doc file containing some images that are created at run time.For that, I have used html and then inserted the html text to QString and then to QTextEdit..Now I want to make this .doc file system independent so the …

How to store and retrieve an image in MS Access with OLE object Datatype using C++/Qt.I have searched a lot but everywhere found visual basic and VB.net codes..Can I have a code to do it in C++ with Qt.

I have installed Qt on my ubuntu laptop and I get nothing but errors compiling .cpp files with <QApplication> preprocessor directives. I am new to using Qt and are reading a book online about it hosted here: http://www.informit.com/articles/article.aspx?p=1405562 Specific error i have obtained running g++ hello.cpp -o hello: hello.cpp:1:24: fatal …

Hello I’m new to QT and C++, my primary language is JAVA (and I’m still a novice at that) But I want to learn how to use QT and C++ combined and create some awesome GUI programs I have a Bioinformatics program that reads a DNA sequence from a text …

Hi there everyone... Allright my setting is this: I have written an C++ application that receives input from a user app, converts it to XML, and then posts it to our ERP (Syspro) through e.net COM objects using ActiveQt and in specific QAxObject... The problem is this: QAxObject inherits from …

Hey Everybody, Allright my setting is like this: I created a derived MVC program using C++ and QT on Visual Studio 2008, that sends multiple instructions to our ERP system through an external program... On each command posted this way the user application needs to wait for a return string …

Please i need help with this piece of Qt code. It gives a compiled error "**empList' was not declared in this scope**" in the getValue() function. This has got me stucked for a couple of weeks now retarding the pace i'm learning the language. I would gladly appreciate any assistance. …

hi guys, im curious about c++ gui qt , the i searched for it and download QT opensource 4.8.2 (300mb+) for windows i run the installer, then it asked me for MinGw's directory in my pc, then i use the MinGw inside my codeblock, after that it said "Found version …

Hi, I just installed PyQt Designer to start creating UI's with python, I've used WxPython and TKinter before, but never really done anything with PyQt. So for some of you this might be a very simple question that I can't seem to find with google. I really like how it …

Hello 'am working in qt creator but have problem running my code. It compiles alright but never executes. And also gives the following message at the output pane 'exited at code -1073741819' Please help me out

Please how do i write comments in a .qrc file in qt c++. I found out the normal c++ comment styles doesn't work. Please i need help.

Hi. So I get this weird error message out from a QT application that i'm creating: 0xc0000005: read access violation at: 0x0, flags=0x0 Basically what I'm trying to do is to set in a QT List Widget an item of type QList Widget Item in which I store two things: …

what QObject: Cannot create children for a parent that is in a different thread. (Parent is QTextDocument(0x905b660), parent's thread is QThread(0x8efc560), current thread is flooderthread(0x8efc548) error means ? and how to solve it??

hey all I've searched all over the web and i didn't get a solution! what should i do to take the text from the 'urlT' line edit? is there another way? Nameerror "global name 'self' is not defined" whats wrong with it? [CODE] from PyQt4 import QtCore, QtGui class Ui_MainWindow(object): …

Hi there, I'm writing some application based on Qt and C++ and I've reached the problem. How to display window via clicking, triggering, etc. I wrote some code: //---------------------------- // THIS IS IN mainwindow.h //---------------------------- #ifndef MAINWINDOW_H #define MAINWINDOW_H #include <QMainWindow> namespace Ui { class MainWindow; } class MainWindow : …

I'm just wondering if the below is true? I pulled this from another forum. Does this mean that a application using qt4 can be built and used in a bank without getting permission or paying fees for it's use? *The Framework is freely available for Windows, Linux, MacOS X, and …

i have a Qt code writed in C++ . i want translate it to python code, but i have a problem in 4 code line: all code is: void TableView::print(QPainter* painter, const QRect& area) { const int rows = model()->rowCount(); const int cols = model()->columnCount(); // calculate the total width/height …

Have some problems with the qt destructor. I'm working on QtCreator: here's the class: the .cpp #include "controller.h" Controller::Controller() { } Controller::Controller(MovieRepo *movrep, MovieValidator *movval){ this->movrep=movrep; this->movval=movval; } void Controller::addMov(int id, string title, string desc, string type)throw(ValidatorException){ Movie* mov=new Movie(id, title, desc, type); movval->validate(*mov); movrep->store(*mov); } const Movie* Controller::getById(int id){ …

hey i heard that there is something called qt signals you can use it to change the GUI out side the main thread coz when i try to change it i get an error that i cant change the gui out of the main thread but i need it to …

I'm trying to print the contents of a QTableView to the printer . i implement bottom script and it run successfully without any error. but all data are Unusual in printPreview. this is [pic](http://img4up.com/up2/75917679167425743216.png) from my problem -[FOUNTAIN](http://www.qtcentre.org/threads/3796-QTableView-printing?highlight=Qprinter) def printTable(self,printer,painter,area): model = self.model myTableView = self.view printer = painter rows …

Hi guys, I am having a small problem on using QNetworkAccessManager in QThread. The error message is: "Object::connect: No such slot QThread::replyFinished(QNetworkrReply\*)" And my code is header class SSLReceive : public QThread { //Q_OBJECT public slots: void replyFinished(QNetworkReply* net_reply); protected: void run(); private: void initialize(); QNetworkAccessManager* manager; QSslConfiguration config; }; …

Hi there, I installed Qt on my Windows 7 machine and I tried to configure CMake but ran into this error: CMake Error at C:/Program Files/CMake 2.8/share/cmake-2.8/Modules/FindPackageHandleStandardArgs.cmake:91 (MESSAGE): Could NOT find Qt4 (missing: QT_QMAKE_EXECUTABLE QT_MOC_EXECUTABLE QT_RCC_EXECUTABLE QT_INCLUDE_DIR QT_LIBRARY_DIR QT_QTCORE_INCLUDE_DIR QT_QTCORE_LIBRARY QT_QTGUI_INCLUDE_DIR QT_QTGUI_LIBRARY QT_QTOPENGL_INCLUDE_DIR QT_QTOPENGL_LIBRARY QT_UIC_EXECUTABLE) Call Stack (most recent call …

Hey Everyone, I have run into a bit of a problem with regards to application startup... I have written a C++ application with QT libraries that uses active QT to communicate with our ERP system in our business, the requirements are that any application we use needs to communicate its …

#ifndef FILM_H #define FILM_H #include <QString> class Film { protected: QString title; double dailyRate; public: Film(QString ti,double dr); QString getTitle() const; virtual double calculateRental(int num)const; }; class Video: public Film { public: Video(QString ti,double dr,QString vt,int d); QString getTitle() const; QString getVideoType() const; virtual double calculateRental(int num)const; protected: QString videoType; …

hey i have this code when starting the Process to make database it freeze at all what should i do? # -*- coding: utf-8 -*- from PyQt4 import QtCore, QtGui import sys try: _fromUtf8 = QtCore.QString.fromUtf8 except AttributeError: _fromUtf8 = lambda s: s class Ui_Dialog(object): def setupUi(self, Dialog): Dialog.setObjectName(_fromUtf8("Dialog")) Dialog.resize(400, …

i'm making this function that replaces single slashes in a path with doubles slashes. It works for everything but slashes because I gotta use doubleslashes to specify a single slash so how do I refer to double slashes. QString AddDoubleSlashtoPath(QString Path){ QStringList splitup=Path.split("//") ;/*supposed to be a single slash*/ QString …

This app I finally got the splashscreen to the way i want it, but when I run the .exe from the explorer the splashscreen loses its transparency and has a white background replacing the glow; In when the compiler runs it directly after it builds it look exactly how it …

The documentation for the textEdited signal shows the use of a required parameter const QString& void textEdited (const QString&) I am unable to get the Signal to work. Perhaps because I do not understand how to use the "const QString&" Is this a literal copy into the parameter or is …

I'm trying to seem if(t3.alive) is not ever entered. It successfully goes through t1 and t2 if statment but skips over three. I've tried the do while, while (like seen). I would think if t3 is still alive the loop would still go then once it's not, its out but …

I would like to study the source codes of openCV and reimplement them by the boost generic image library, I hope the algorithms developed by GIL could be integrated with Qt seamlessly. There are many libraries of image processing and I don't need to implement them again if I only …

#include <QApplication> #include <QLabel> #include <QVBoxLayout> #include <QTextEdit> #include <QWidget> int main (int argc, char* argv[]) { QApplication app (argc, argv); QWidget window; QLabel* label = new QLabel("Please enter some text"); QTextEdit* textEdit = new QTextEdit; QVBoxLayout* layout = new QVBoxLayout; layout->addwidget(label); layout->addwidget(textEdit); window.setLayout(layout); window.show; return app.exec(); } 1.Qt provides …

Hii friends, In my QT code am using style sheet for radio button as below "QRadioButton::indicator:checked {image: url(" + strCheckedRadioButtonImagePath + ");}"\ It works fine and image is loaded but the problem is when i select the radio button a rectangle shaped dotted lines are appearing around radio button.Its the …

Code blocks are created by indenting at least 4 spaces ... and can span multiple lines class Wizard : public QDialog { Q_OBJECT public: Wizard(QWidget *parent); private slots: void what_ever(); private: QPushButton *what_ever; }; Wizard::Wizard( QWidget *parent ) : QDialog(parent) { QGridLayout *layout = new QGridLayout( this ); QScopedPointer<QTextEdit> textEdit(new …

Hi There, I hope somebody can help me, I work with Visual C++ 2008 with QT libraries I am trying to include a Interop.Encore.dll file into my program to access our ERP system business objects and post new data to the ERP We have a Visual Basic program geared to …

I'm not sure if this is the best place for this thread, but it's the best I could come up with. I'm using a QT Style Sheet to style a radio button like this: [CODE] QRadioButton{ background:#5F7536; color:#CBF57D; font:bold; } [/CODE] It works fine except that in addition to changing …

Hi I am working on Linux and I am trying to create a GUI app to go with my executable I have made. For some reason it unexpectedly ends. There is no error message, it just says in the Qt console window it unexpectedly ended with exit code 0. Can …

Hi. I am a beginner and i have been facing this problem since Monday. I made a QMainWindow with name window and added an action in it. So when a user clicks the action, the QDialog dialog is displayed. In dialog i take input from user and then return it …

I wrote the following code, so that whenever an item from the list is deleted, the file associated with the name of the items below the delted items get updated. But the program isn't working, i have been reviewing this code for last 2 days but worthless. Please help. void …

Qt ide gives error about"error: passing 'const QChar' as 'this' argument of 'QChar& QChar::operator=(const QChar&)' discards qualifiers" here for(int i=reqposition;;i++) { if(data.at(i)==',') break; temp.at(j)=data.at(i); // ERROR IS HERE j++; } what do i do to solve it!

Hi guys, converting .ui to .py to .exe using Qt Designer (PyQt4), Python 2.7, and py2exe Ive been able to do this with Tkinter gui's but having problems with gui's from Qt Designer? First error was due to missing msvcp90.dll which ive downloaded and copied into the python dll directory, …

First question here, so bear with me. I have been trying to create a view on a QMainWindow using a QDeclarativeView as the canvas, but whenever I try to switch the source of the QDeclarativeView my program segfaults and I frankly have no idea why, or how to fix it. …

I made the following program, but now i am getting an error. I searched for error almost 3 hours but worthless. I want to discuss the problem with you people. I am getting the error: [B] expected class-name before '{' token[/B] #ifndef ASKDIALOG_H #define ASKDIALOG_H #include <QDialog> #include "umerwindow.h" namespace …