[qt] Forum Topics

I've downloaded the file "qt-unified-windows-x86-3.0.0-online.exe" and installed Qt and I've also downloaded and unpacked the file "PyQt5_gpl-5.9.zip". I'm using Python 3.6 but I can't figure out where to drop the extracted PyQt5 files. I can't find a Python directory anywhere on my C: drive except for under my home directory. …

Hi Guys, I wanna know how to change a label's text thats in a different form when the user presses a button in the mainform, I have heard about the Signals and Slots thing but not experienced enough to understand that, Please Help Me!

i made a project using visual studio and opencv ,it worked fine. however later i thought of adding GUI. i googled and found abput QT.some how i managed to include libraries and build paths,when i use **C fucntions of opencv** the program works fine but when i use ***c++ features …

Hello People! I am quite new to Qt (and programming in general). And I am making a program that requires me to encrypt a file and decrypt it after asking for a password through the program. But I have no Idea where to start. What I already have - A …

I wrote this function I plan on using to load in .obj files from Blender into a DirectX application. The problem I'm having is that when when the model is loaded, it appears that every other triangle face is missing in a pattern, for every quad, only 1 traingle is …

Hi there, I am a newbie in programming. Python is my choice. because it is easy to learn. But the Tkinter GUI making is horiible. I don't like to write code for GUI. I like the visual basic method. So i installed Qt Designer. But i don't know how to …

I'm writing classes for widgets on a ui. While planning what I would do, I realized majority of the of the classes would look very similar. What I decided to do was to use a macro that takes a few parameters to define the similar parts of the class bodies. …

Right everyone, here's my problem. I have just paid £45 for a book on Qt, have had a nightmere getting it sorted, and finally I can build apps to this extent... I have an app, *test.pro*. I have built it using `qmake test.pro` -> `make` which works. I am using …

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 …

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 …

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: …

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 …

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 …

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 …

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 …

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, …

I have designed a dialog in Qt designer and I want to use the name of each child widget for some coding in cpp file. But the names I have given to buttons etc in Qt designer are not working as pointer.More over their names in ui_[I]mydialogname[/I].h are not the …

Hi. I made a program and I write this code in order to make the window's size fixed. More over i am using a button to unhide some Groups on main window, But when i compile program, it crashes but when I comment out this line of code the program …

Hi, I started with C++ development recently, and I think I'm ready to start building GUIs for my apps. I'm thinking about using Qt, since it is the most popular C++ GUI library, but the licensing is really confusing, and there isn't a lawyer nearby that understands software licensing who …

Hello altogether, I am supposed to work through a project written in C++ and QT for Windows platforms. Now I am not an expert in window-related stuff. I installed MinGW 3.4.5 and QTSDK on Win XP SP3. I am using the tool "qmake" to create a makefile with all dependecies …

Hi there everyone, I really hope someone can help me, I am working with Visual C++ with QT libraries and using... well... something that represents MVC (long story)... now I need to pass a const QString& from my 1 controller class to the model of another class... When doing so …

My code for the calculator is: calculator.h [CODE]#ifndef CALCULATOR_H #define CALCULATOR_H #include <QWidget> #include <QGridLayout> #include <QLineEdit> #include <QLabel> #include <QPushButton> #include <QLCDNumber> #include <QString> #include <QMessageBox> #include <QErrorMessage> class Calculator : public QWidget { Q_OBJECT public: //constructor Calculator(); public slots: //function to add the two numbers that the user …

[URL="http://www.pyside.org/"]PySide[/URL]: Python for Qt 1.0 released! The PySide team is thrilled to announce the release of PySide: Python for Qt version 1.0.0. In addition to the source code release, project community packagers have already released binary packages [developer.qt.nokia.com] for all major Linux distributions, Microsoft Windows, Mac OS X, and Nokia’s …

I downloaded data from google.com/favicon.ico and saved it in a file "icon.png" using the following: [CODE]URL url=new URL("http://www.google.com/favicon.ico"); InputStream ss=url.openStream(); byte bytes[]=new byte[100000]; int offset = 0; int numRead = 0; while (offset < bytes.length && (numRead=ss.read(bytes, offset, bytes.length-offset)) >= 0) { offset += numRead; } FileOutputStream out=new FileOutputStream("icon.png"); out.write(bytes);[/CODE] …