QBackingStore::endPaint() called with active painter on backingstore paint device

Question

I'm following this tutorial for deploy qml to yocto. I'm using beaglebone black not raspberry but i think it is not important. When i ran cmd "./QmlProject" on beaglebone black , I had an error:

QBackingStore::endPaint() called with active painter on backingstore paint device

Does someone have a solution for this? or Does someone have a solution for deploy qml to yocto?.

Hi Oleksandr Kravchuk , I tested on QT5.10.1, 5.11.1 and 5.9.1 — Đại Ngoc, Sep 12 '18 at 04:42
any updates on this please? same is happening with me when deploying to board with QT5.10.1 — sayo9394, Jul 31 '19 at 02:33
NOT JUST AN EMBEDDED LINUX problem, I am seeing it on a full RHEL box with QT 5.12.9 — trumpetlicks, Dec 29 '20 at 15:14

score 0 · Answer 1 · edited May 01 '21 at 21:38

I am getting this warning when i am trying render my pdf file on linux using poppler.

my QT version 5.11

I have a doc viewer class with paint event method. It's gets QPaintEvent e (QPaintDevice) and calling method RenderPages with painter and this device. My code was:

DocViewer.cpp

void DocViewer::paintEvent(QPaintEvent *e)
{
    qDebug()<<"cccc";
    QPainter* painter = new QPainter(this);

    m_IDocWidget->RenderPages(painter);
}

A possible solution is ending painter after render pages

void DocViewer::paintEvent(QPaintEvent *e)
{
    qDebug()<<"cccc";
    m_painter->begin(this);

    m_IDocWidget->RenderPages(m_painter);
    m_painter->end();
}

QBackingStore::endPaint() called with active painter on backingstore paint device

1 Answers1