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QT QUESTIONS

SAFEARRAY* to QByteArray
SAFEARRAY* to QByteArray
To fix this issue I'm get through c++ invoke(...) method result at type VARIANT * var. var is .bmp image. , Igor, great thanks!!!
TAG : qt
Date : November 13 2020, 09:01 AM , By : Danish Habib Khan
QML ListView with sections representing first letter of model's name role - sections are not visible
QML ListView with sections representing first letter of model's name role - sections are not visible
Any of those help I have QML ListView, which shows customers from database via UeCustomerModel. Customers are sorted in model via MySQL statement. All works fine, but now I want to add sections into ListView, so the customers are sorted in sections b
TAG : qt
Date : November 13 2020, 05:40 AM , By : David
Cannot link shaders. ERROR:LINK-9 (line - 1) Missing main function for shade
Cannot link shaders. ERROR:LINK-9 (line - 1) Missing main function for shade
wish helps you You got the data structurs for the shader source code totally wrong. glShaderSource accepts an array of pointers to char*, so a sequence of strings. You store your shader source code in a 2-dimensional array char. Contrary to a somewha
TAG : qt
Date : November 04 2020, 04:02 PM , By : AniShiva
How to prevent decompression bomb attack in Qt
How to prevent decompression bomb attack in Qt
I think the issue was by ths following , Maximum memory which qUncompress can allocate is 2147483632 bytes. It's a little more than 2GB. If the size of uncompressed data exceeds this limit, qUncompress return empty QByteArray.Theoretical limit of com
TAG : qt
Date : October 31 2020, 01:47 PM , By : Mohammed Hayath
Qt: How to lock/prevent a file from being read while it is written?
Qt: How to lock/prevent a file from being read while it is written?
Does that help If you have the source to both applications, then the one writing the file can signal the other application by one of many IPC mechanisms (e.g. local sockets) that it has finished writing. Alternatively, write to a file with a differen
TAG : qt
Date : October 29 2020, 06:12 AM , By : NM .net Geek
How to position a QStaticText by its baseline?
How to position a QStaticText by its baseline?
This might help you It turned out that drawStaticText positions the text at the baseline, but offsetting the y-coordinate by the font's ascent.This is meant by top of the font in the documentation.
TAG : qt
Date : October 29 2020, 04:55 AM , By : Megan Van Der Bank
Q_OBJECT and Q_MOC_OUTPUT_REVISION . How and why we need to define the qt_metacast and qt_metacall
Q_OBJECT and Q_MOC_OUTPUT_REVISION . How and why we need to define the qt_metacast and qt_metacall
like below fixes the issue Qt provides extensions to the C++ language, such as the meta-object system, which provides the signals and slots mechanism for inter-object communication, run-time type information, and the dynamic property system.In order
TAG : qt
Date : October 28 2020, 08:10 AM , By : Engr Muhammad ZUBAIR
QGraphicsItem::itemChange notified for position change but not for size change
QGraphicsItem::itemChange notified for position change but not for size change
it helps some times The problem is that QGraphicsItem's position is not related with QGraphicsEllipseItem's rectangle. The first one is a position of the item relative to it's parent item or, if it is NULL, to it's scene. The last one is a rectangle
TAG : qt
Date : October 24 2020, 01:32 PM , By : Peterson Fonseca
Applying QTransform on QPainter - how to find translations
Applying QTransform on QPainter - how to find translations
help you fix your problem I am posting the function to perform both rotations and mirror, by rotating the QPainter. I could not get an actual formula - most was trial and error and redrawing an object over and over, with its rotation.
TAG : qt
Date : October 24 2020, 01:32 PM , By : Jim
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