Error creating ssl context - QNetworkAccessManager
I am using Windows 7 and QNetworkAccessManager fails to download with following error: error creating ssl context() I tried copying libssl32.dll, libeay32.dll and ssleay32.dll in the directory...
View ArticleQT Webkit cannot play html5 video
I built the youtoubeview example, but I cannot play any video. All I get from youtube is text stating that an Adobe Flash Player or a browser supporting HTML5 is required, in front of a static noise...
View ArticleOfficial Qt 5.1 android application deploy error on device ..
hi all, I downloaded the latest official Qt-5.1 for android using the offline installer Qt 5.1.0 for Android (Linux 32-bit, 463 MB) , latest ndk (android-ndk-r8e-linux-x86.tar.bz2)...
View ArticleMemory problem and strange behaviour
Hi, I’m quite new with Qt, and I have some issues with my program. Some executions end without any errors, and others don’t. Sometimes, the debug consol print a lot of lines, like there are a memory...
View ArticleErrors when building Qt5.1.0 with MSVC2012 Update 3
I was trying to build Qt5.1.0 ×64 with MSVC2012.3, in Windows 7 64bit. But it seemed that the uic.exe couldn’t work, it crashed when the building steps run it. I replaced it with an older one in...
View ArticleRubberBand in qml
I want to crop the Image in qml, like this crop [flickr.com] The region surrounded by the rectangle is the region I want to crop Do Qt provide any tools to make this job easier? import QtQuick 2.1...
View ArticleI have some problems with uninstalling, please help me
I`d like to uninstall qt.. I went to qt enterprise maintenance tool->remove all components->uninstall.. “ENTER YOUR PASSWORD TO AUTHORIZE FOR A SUDO” Program asked me to enter my sudo...
View ArticleI want to change the position of QMenuBar in the QMainWindow
I hope there is such a way to do that. Or maybe have other methods to put QMenuBar into widget? That’s really not easy to use QMenuBar in QT, I didn’t gotcha the idea of specialize the QMenuBar and...
View Articleui doesn't get updated when accessed from other class through method
I’m trying to access the ui member which is private in the MainWindow class. I would like to update a lineEdit (Xvaldisp) when I release the mousebutton (with the amount the mouse moved)from a gl...
View ArticleI have a MainWindow .ui file and a QWidget .ui file, I want to use the latter...
I want to use the QWidget .ui file as and sub Widget for MainWindow how to do that? Is that possible to directly to description in .ui file or I need to use code to create it.
View ArticleList images in QGraphicsView/Scene with flowout mode
I need to list a uncertain number of images in QGraphicsScene. Currently all images are displayed in the same position. How can QGraphicsScene display images in Flowout mode, say, no need to position...
View Article2D Painting Example
In following example: 2D Painting [qt-project.org] Please someone can explain me paint function in helper class?? void Helper::paint(QPainter *painter, QPaintEvent *event, int elapsed) { ...
View ArticleQt 5.1 Qt3D linux x86_64 module "Qt3D" is not installed
When I run the application the module Qt3D is not detected. If I copy the Qt3D folder from qml to imports it is detected but I still get an error: plugin cannot be loaded for module “Qt3D”: Unknown...
View ArticleCannot build QtJsonDb in Qt 5.1 for desktop
Host: Ubuntu 13.04 ×64 error: g++ -c -pipe -g -fvisibility=hidden -fvisibility-inlines-hidden -std=c++0x -fno-exceptions -Wall -W -D_REENTRANT -fPIC -DQT_NO_LIBUDEV -DQT_NO_XKB -DQT_BUILD_JSONDB_LIB...
View ArticleSeeking mentor/guide for Qt application development
I have an interest in learning Qt. I feel that working on a particular project (even if small) will help to motivate my education. So I am presently attempting to develop a Qt-based GUI for a series of...
View ArticleDebugging QML throught Qt Quick 1 App (using cmake)
Hi, I need a little help to understand what does the .pri of the Qt Quick 1 App template to enable QML debug. I need to understand it because I must rewrite it for my project. Which required use of...
View ArticleUnderstanding the Mapping from View Coordinates to Scene Coordinates
I was expecting the following snippet of code to show me 4 squares on each corner of my monitor (whose resolution is 1920×1080) on a frameless and fullscreen QGraphicsView that occupies the entire...
View ArticleTime left for display to be updated
Hello, I’m developping a video software where a video is shown to a test subject and after a while some effects are added to the video and the subject’s reaction is measured. To make this possible I...
View ArticleBackground process on IOS
Hi all, I’m testing a Qt application (5.1) on an IOS device. I created a simple thread which prints a message every x seconds. Unfortunately this thread doesn’t work when my application goes to the...
View ArticleQML text rendering performance unacceptably slow
Hi, I’ve been using QQtQuick2.0 for a few months now to write a desktop application for use under Linux. It’s working great, I’m very impressed with what I have so far. However, as soon as I add some...
View Article