[qt] Forum Topics

Hi. I have made a simple testing program which I'll use in another program later. I create the items of the QListWidget through looping and now I want to make changes in one of the items of the list, which the user clicks. But when I call a fucntion to …

Hi guys. I am a bit confused among the following three functions. read() readAll() readLine() How do they work? I'll be really thankful to you all. Thanks alot for your precious time! Regards.

What does this statement mean "[B]These functions (read(), readline(), readAll()) read a line of ASCII characters from the device, [U]up to a maximum of maxSize - 1 bytes, stores the characters in data, and returns the number of bytes read[/U].[/B]" I have used readAll() and readLine() it returns all the …

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 guys I have been wondering can we develop android apps on Qt? Do we have to learn Java inorder to program for android in Qt or All the programming will be done in C++. Actually I don't want to learn Java any recent because I am working on someother …

what does the following code means in Qt programming.. QDialogButtonBox::Ok why are we using QDialogButtonBox:: .

Hello. I compiled a basic GUI example written with Qt. When I run with valgrind, it tells that there is memory leak. It is stranger, because at each time I run the app, the number of malloc calls are different. Qt seems nondeterministic. [CODE] #include <QApplication> #include <QPushButton> int main(int …

i want to Display my QTableView insid QTextEdit ? can i do this thing ?? if i can how i can do it ?

Hi everyone ! i havent posted in a while i guess i just took a break O.o But i am having a problem i designed a UI in qt designer and then did [CODE]pyuic4 -x backup.ui -o backup.py[/CODE] That worked perfectly i can execute it and i have a nice …

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 …

[CODE=c++] #include <QtGui> class MaskedLabel : public QLabel { protected: void resizeEvent(QResizeEvent* event) { QLabel::resizeEvent(event); QPixmap pixmap(size()); pixmap.fill(Qt::transparent); QPainter::setRedirected(this, &pixmap); QPaintEvent pe(rect()); paintEvent(&pe); QPainter::restoreRedirected(this); setMask(pixmap.mask()); } }; int main(int argc, char* argv[]) { QApplication a(argc, argv); QLabel* label = new MaskedLabel(); label->setText("Qt Centre!"); QFont font = label->font(); font.setPointSize(72); label->setFont(font); label->show(); …

Ok, in a very simplified version ive got to write a C++ app to interface with a joystick and play various sounds depending on its position - Its a USB joystick and I will have a QT GUI. This app already exists, for Windows/C# . I just need help porting …

Greetings, I'm using PyQt4 and trying to add a QGraphicsItem exactly in the center of the current screen, by clicking a menu button. So each click will add an item in the center of my screen. My QGraphicsScene is very large (10k X 10K), so the QGraphicsView cannot show it …

Hi everyone, I am trying to create Tag Extractor which is much like Twitter's Trending topics or Google's Top searchwords. Input file consists of a collection of some 3000 tweets. Problem 1: I am using "Qt" as the front end.(Entirely newbie to qt). Using two "List View" controls. one loads …

Hello folks,i am teaching myself qt and i have run into a problem.In my data entry application,i want to bind my forms to my grid explained in this picture: [URL=http://imgur.com/KeNTI][IMG]http://i.imgur.com/KeNTI.png[/IMG][/URL] Right now,i am scratching my head plotting on how i am gonna accomplish this. Ideas are welcome.

I'm new to [B]Qt[/B]. What resources do you recommend for learning Qt? Thanks.

[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 …

Hi, I am starting to make programs with GUI, so with buttons, frames etc, and some of them will work via internet, like multyplayer card game or something like that. So during my search, I ran onto few choices, Qt, Win32 api, wxWidget and by most forums the Qt is …

Hello, Currently, I am trying to write a program which should upload a file to an FTP server. As recommended in the QT Docu., I chose to use QNetworkAccessManager's put function instead of QFtp. As far as I know, I should be able to access the FTP Server without using …

Alright guys, I'm in quite a situation. I have a project for school to create an application in C++ that can create and generate shopping dockets/receipts. This includes being able to add the names of the items, the prices, and then finding the total price of the purchase. We can …

i just downloaded qt and i dont know how to build in qt, it keeps saying: Could not find make command: mingw32-make.exe in the build environment Error while building project case (target: Desktop) When executing build step 'Make' Could not find make command: mingw32-make.exe in the build environment Error while …

HI I have a Map Image that I got from OpenstreetMap(Osmarender Image ) .My question is how to convert geographic coordinates to the co-ordinates of my picture (that is in pixels on X and Y on a picture). That is I receive geographic coordinates and it is necessary for me …

I need help with a py generated file that was made in QT. I use the following line [CODE]QtGui.QTabWidget.addTab(self.tabWidget, QtGui.qApp.tr("New Tab"))[/CODE] and get this error [CODE]Traceback (most recent call last): File "C:\python\mainwindow2.py", line 349, in createInvoice QtGui.QTabWidget.addTab(self.tabWidget, QtGui.qApp.tr("New Tab")) TypeError: arguments did not match any overloaded call: QTabWidget.addTab(QWidget, QString): argument …

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] …

Hi, Im trying to do a screen-flashing application, that flashes the screen according to the music(which will be frequencies, such as healing frequencies, etc...). I already made the player and know how will I make the screen flash, but I need to make the screen flash super fast according to …

Im trying to do a screen-flashing application that flashes the screen depending on the audio(like an audio visualizer, but instead of a visualization like bars or something like that, just flash the screen). I already made the music player and know how to make the widget get full screen and …