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Cannot Assign To Pixmap During Painting Qt

Reply Quote 0 Loading More Posts 8 Posts 4624 Views Reply Reply as topic Log in to reply 1 / 1 Bugzilla – Bug2464 QPixmap::operator=: Cannot assign to pixmap during painting Dezember 2004 11:54 Kontaktdaten: Kontaktdaten von FlorianBecker Website Zitat Beitragvon FlorianBecker » 16. Why does Friedberg say that the role of the determinant is less central than in former times? You can't create the pointer to the QGraphicsPixmapItem like that. http://electrictricycle.net/cannot-assign/cannot-assign-to-pixmap-during-painting.html

Screenshot instructions: Windows Mac Red Hat Linux Ubuntu Click URL instructions: Right-click on ad, choose "Copy Link", then paste here → (This may not be possible with some types of Réponses IIrmatDen May 2007 Salut,Tu ne peux manipuler un QPaintDevice directement tant qu'il est lié à un QPainter. Search: LoginHelp/GuideAbout TracPreferences WikiTimelineRoadmapBrowse SourceView TicketsSearchMetrics Context Navigation ← Previous TicketNext Ticket → Opened 6 years ago Closed 6 years ago #2884 closed bug (duplicate) crash when resizing vertically the overview In this case I'm experiencing the crash while resizing it vertically, not horizontally. http://www.qtcentre.org/threads/37297-QPixmap-operator-Cannot-assign-to-pixmap-during-painting

Paint() just tests to see if the pointer is null, but how does it really know that the other thread is done? If true I will forward the problem to TrollTech. This much is working so far.

Reply Quote 0 jk_mk last edited by I have tried this and I couldn't display my image in the QGraphicsView at all: @void MainWindow::push_button_File(void) { QGraphicsPixmapItem* pixmapItem = new QGraphicsPixmapItem(); QString I setup a signal slot mechanism. If you need more help, you will have to post some relevant code for us to be able to (maybe) help you. By updating, i mean writing to a QTextEdit object which i use for logging.

Briefly describe the problem (required): Upload screenshot of ad (required): Select a file, or drag & drop file here. ✔ ✘ Please provide the ad click URL, if possible: Home Browse Click here! Warning: QPainter::end: Painter not active, aborted Warning: QPixmap::operator=: Cannot assign to pixmap during painting Warning: QPainter::begin: A paint device can only be painted by one painter at a time. References QPixmap::QPixmapData::bitmap, copyBlt, data, depth(), QShared::deref(), QPaintDevice::devFlags, QPaintDevice::hd, height(), init(), isNull(), QPixmap::QPixmapData::optim, QPaintDevice::paintingActive(), QShared::ref(), QPaintDevice::rendhd, QPixmap::QPixmapData::uninit, and width().

But when I have already loaded an image in my QGraphicsView, and I am trying to load an other image, then my new image is displayed on my previous image. Vielleicht weiss jemand, was für Ursache dafür ist und wie ich das beheben kann?! The following line from the LoadTilePixmap() function, which you run in a separate thread, I believe, tries to paint the content of your pixmap item on the screen. I just hope Uwe or someone = else can make use of it.

Oldest first Newest first Threaded Comments only Change History (12) comment:1 Changed 6 years ago by jef Component changed from Build/Install to GUI Description modified (diff) comment:2 Changed 6 years ago Was auch öfters hilft ist das strace Programm, damit wird festgestellt, welche Dinge dein Programm wie erledigt und wo genau es stehen bleibt. Advanced Search Forum Qt Qt Programming QPixmap::operator=: Cannot assign to pixmap during painting If this is your first visit, be sure to check out the FAQ by clicking the link above. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.

From whatever documentation I've read update indirectly schedules a paint call. http://electrictricycle.net/cannot-assign/cannot-assign.html I've compiled QGIS with debugging options on, here's the backtrace of the segmentation fault: Debug: /usr/local/src/qgis_unstable/src/core/qgsmaprenderer.cpp: 224: (render) ========== Rendering ========== Warning: QPainter::end: Painter not active, aborted Debug: /usr/local/src/qgis_unstable/src/gui/qgsmapoverviewcanvas.cpp: 162: (drawExtentRect) lagrille->getCase( lg, cl)->estVide()) continue;

// La case est vide, faut afficher les candidats
pen_case.fillRect ( rect_case, QColor (Qt::transparent) );
pen_case.drawRect(rect_case); IIrmatDen May 2007 Alors, en vrac:> tu Please don't fill out this field.

more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed On 1941 Dec 7, could Japan have destroyed the Panama Canal instead of Pearl Harbor in a surprise attack? Skip user information krupa Beginner Posts: 1 1 Friday, October 28th 2005, 12:48am QTextEdit updation errors - Please Help ! have a peek here Soll heißen, das bei jedem gdb back das gleiche Ergebnis rauskommt.

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Warning: QPainter::end: Painter not active, aborted Warning: QPixmap::operator=: Cannot assign to pixmap during painting Warning: QPainter::begin: A paint device can only be painted by one painter at a time.

This is a dump from a console window: ASSERT: "y>=3D0" in file = c:\iwmake\build_vs2005_commercial_________________padding _________________\src\gui\painting\qpaintengine_raster_p.h, line 293 QPixmap::operator=3D: Cannot assign to pixmap during painting QWidget::repaint: recursive repaint detected. Secondly I even tried a signal slot mechanism where a queued slot is being used. But like my preposter said, it is hard to give a solution not knowing the code. Thanks, Krupa Go to the top of the page Skip user information hatulflezet Professional Posts: 1,301 Location: Munich Germany Occupation: Programmer 2 Friday, October 28th 2005, 10:37am With threaded applications, specially

But loading all the tiles at once is time consuming and takes up a lot of memory. Instead i am using QCustomEvent objects to send events to the Widget. Do you have a Qt 4.2.0 snapshot to check, if it happens there too ? http://electrictricycle.net/cannot-assign/cannot-assign-a-nil-to-a.html Borders table Latex Why cast an A-lister for Groot?

regards, hannesvdc Reply With Quote The following user says thank you to hannesvdc for this useful post: zeFree(1st November 2013) + Reply to Thread Quick Navigation Qt Programming Top Site Areas