97 Topics
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 | 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. … |
 | Hello, I am trying to add a feature to a lab I am working on where I have to have a way to show images of the 20 pen widths the Easy Paint Lab can do. I am trying to use a ComboBox from Qt in order to do that. … |
 | Hi all, I am developing a Qt Gui application. Here I have a Qtreeewidget that has a list of Qtreeewidgetitems. I also have a qtablewidget beside it which displays some information when any item present in the list is clicked/selected.When the content of any of the cell in the tablewidget … |
| | [CODE]# -*- coding: utf-8 -*- from PyQt4 import QtGui from PyQt4.QtCore import * import sys import os class VideosToMp3(QtGui.QWidget): def __init__(self, parent = None): super(VideosToMp3, self).__init__(parent) ''' Labels and GUI ''' extension = QtGui.QWidget() download_label = QtGui.QLabel("Enter YouTube video URL:") self.download_line_edit = QtGui.QLineEdit() file_label = QtGui.QLabel("Enter file name (optional):") self.file_line_edit … |
 | 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 am developing Client-Server application in C++ using Qt framework, but the clients can be android phones and computers(Qt client app) Now i'm having troubles to handle Reception of data on the server side; the server is not receiving data properly. First, I got things working nicely between the server(Qt … |
| | Hi all I have a qt application in which I have a QTreewidget that displays some content in the QTextBrowser. I set the contents for the html document in the textbrowser using the setHtml() function. All I want now is to fetch the url of this html document so that … |
| | Hello, So I'm having trouble figuring out what the correct syntax is for a function with a return type that is a template type and is within a namespace. Anyone see anything wrong with the code below? -------.HPP file: #pragma once #ifndef EC_UTIL_H #define EC_UTIL_H #include "../CommonHeaders.hpp" #include "../core/common/APVertex.hpp" #include … |
| | I have a horizontal layout inside which i have added a group box. The group box is split using a QSplitter and contain a QListWidget and a QTextBrowser. I want to add two push buttons at the bottom right corner of the window to navigate inside the QTextBrowser. I'm adding …  |
| | hello i download qt sdk and started the qt creator and tried to do a simple empty project but it says The program has unexpectedly finished on the error list and i tried many examples but same thing happens , im using windows 7 x64 homepremium and mingw as a …  |
| | Hi All, I´m using a QTextBrowser to display an external html document (and its image resources) which is placed in the same directory as the application. Everything works fine except that images are not displayed properly. Instead of the actual picture there is a "missing image" icon. I tried different …  |
| | I am new to Qt and I'm trying to connect a remote database. QSqlDatabase db = QSqlDatabase::addDatabase( "QMYSQL" ); db.setHostName("IP ADRESS"); // local or IP db.setPort(3306); // Default port is 3306 db.setUserName("DB USER"); // example root db.setPassword("PASSWORD"); db.setDatabaseName("DB NAME"); if( !db.open() ) { qDebug() << db.lastError(); qFatal( "Failed to connect." … |
| | 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 …  |
| | I am using Qt5.2.1 and I made a program that stores some data into a file and then reads the data. it stores some variables values. After I restart my program... I want to read those values and re-store the values of those variables... How can I do this? I …  |
| | I am using Qt 5.2.1 and I made a program that takes some values and saves them on a text file. What I want is that everybody can see this file and read the content but nobody can edit it. To edit it, you would have to run the program … |
| | 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 am using Qt5.2.1 and I made a program to do some stuff. In it I added a radio button (named 'others') i want that when the user clicks this button a line edit pops up besides it and lets the user enter some stuff inside it. when the user … |
 | 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 daniwebbers. I've been hearing a lot about Qt when searching for a library to ease my pain of creating GUI's with native windows API. I'm hoping folks here might be able to offer some sage councel before I do something irreversible to my IED environment (vs 2010) that I'll … |
| | 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 …  |
| | Hi, I'm creating remote desktop application in qt 4.8. I have to implement some way to browse remote computer directory structure and possibility to download files on local machine. I'm wondering how can achieve this... ![Member Avatar for [Prototype]](https://static.daniweb.com/avatars/orig-avatars/avatar913340.gif){kind=avatar} |
| | Hi friends, # Heading Here # Could anyone help me,how to send email in qt using command prompt commands.. |
 | Hey i try to work on custom signal but i get an compiling error: QObject::connect: No such signal QLabel::changerSignal() in ..\textbasedrpg\FenPrincipale.cpp:173 But i seem to write exactly same thing in header and .cpp »That an big moment i try to see what i do incorrect but can't find. Same an … |
| | Hello, I have a problem using Qt 4.8.4 on VS2012. I manage to compile the code but when I run it, it says: Qt: Could not initialize OLE <error 80010106> on the console but since it has reached the end of the program where it says 'press any key 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. … |
 | Hello, I'm building opencv library with cmake for mingw to be used with qt and i've been able to generate the makefilelist. But when i type **mingw32-make** at the command prompt i get error when it's 44% built. error says: *Cannot export _ZN12_GLOBAL__N_13R)p3aLLEv: symbol not found Cannot export _ZN12_GLOBAL__N_17CmpType3allEv: symbol … |
| | Hello, I'm having a play with Qt and can draw what I want, perform transforms, more the origin with a translation but would like to know how big the area I have to paint on is and is it possible to control this. I've read the entries for things like … |
| | After appending an item to a QList which is pointed to by a QMutableListIterator, I find out the next value of the iterator points outside the list. Or can't i point the iterator to any where in the list except the beginning and end? Please i need help. |
 | I recently made an appication that utilizes pyqt , i could say i wrote the code pythonic and made everything work work as I wanted, but didnt used any data model , so later I realized I could have used data model since I am building list in the QListView … |
| | I have made an standalone app inheriting from base class `QtGui.QFrame`, and now i want to add a floating toolbar to it the way I could have in QMainWindow, how should I do it ? |
 | Hi everyone, Heres my problem: I've installed Qt 4, and there is **no** qmysql.dll/.a in C:\Qt\4.8.4\plugins\sqldrivers\. I am running a MySQL database program and I get Database error: Driver not loaded. Theres not really a lot of help anywhere on google so hopefully DaniWeb will yet again prove itself as … |
| | Hello, I have got [this](http://www.yasinuludag.com/darkorange.stylesheet) a Qt stylesheet, how do I load it to my PyQt module after creating a QString Object. if I do from PyQt4 import QtCore s = QtCore.QString('c:\myProject\darkFantasy.stylesheet') the above code loads the path string rather than the actual stylesheet. So how do I load the … |
| | 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 … |
| | from PySide import QtCore,QtGui import sys class ToolBarUI(QtGui.QMainWindow): def __init__(self,*args,**kwargs): super(ToolBarUI,self).__init__(*args,**kwargs) self.floatingToolBar() pass def buttons(self): self.btnVLay=QtGui.QVBoxLayout() self.incSavbtn=QtGui.QPushButton("Save") self.emailbtn=QtGui.QPushButton("Email") self.upldbtn=QtGui.QPushButton("Upload") self.setPrjbtn=QtGui.QPushButton("Set Project") self.setThumb=QtGui.QPushButton("Set thumb") self.shwMatbtn=QtGui.QPushButton("Show Material") self.fixtexbtn=QtGui.QPushButton("Fix Texture Paths") btns = [self.incSavbtn,self.emailbtn,self.upldbtn,self.setPrjbtn,self.setPrjbtn,self.setThumb,self.shwMatbtn,self.fixtexbtn] [self.btnVLay.addWidget(each) for each in btns] def floatingToolBar(self): self.buttons() self.setLayout(self.btnVLay) self.show() pass if __name__ =='__main__': app = QtGui.QApplication(sys.argv) app.setStyle("cleanlooks") win … |
| | 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 … |
| | 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 … |
| | 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 … |
 | 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 … |
 | 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 … |
 | 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?? |
| | 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 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 … |
| | 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; … |
| | 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 … |
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