Qt Paint Event Not Called at Christopher Prior blog

Qt Paint Event Not Called. You missed to call the base class qmainwindow::event() in the coloursampler::event(), which will cause the whole qobject (and qwidget). Paint events are sent to widgets that need to update themselves, for instance when part of a widget is exposed because a covering widget was moved. Only my manual update(), repaint() calls fail. I have done some debugging and realized that my thread still. We draw image on the qwidget's paint event, to trigger this we call repaint()/update() whenever a new image is available. On linux the video is displayed, but occasionally the widget stops updating. I have a class that extends qmainwindow and i overrode the paintevent method, but it never gets called. Is a virtual member function of qwidget class and it's used to draw on widgets derived. But repaint () in mousemoveevent doesn't call/trigger paintevent. Implement a qtimer to trigger update() or repaint() every 500ms. The idea is to just click on canvas drag the mouse and draw a rect.

c++ Painting issue in Qt custom frameless window between monitors
from stackoverflow.com

Paint events are sent to widgets that need to update themselves, for instance when part of a widget is exposed because a covering widget was moved. Implement a qtimer to trigger update() or repaint() every 500ms. Is a virtual member function of qwidget class and it's used to draw on widgets derived. The idea is to just click on canvas drag the mouse and draw a rect. You missed to call the base class qmainwindow::event() in the coloursampler::event(), which will cause the whole qobject (and qwidget). I have done some debugging and realized that my thread still. On linux the video is displayed, but occasionally the widget stops updating. Only my manual update(), repaint() calls fail. I have a class that extends qmainwindow and i overrode the paintevent method, but it never gets called. We draw image on the qwidget's paint event, to trigger this we call repaint()/update() whenever a new image is available.

c++ Painting issue in Qt custom frameless window between monitors

Qt Paint Event Not Called Only my manual update(), repaint() calls fail. I have done some debugging and realized that my thread still. Paint events are sent to widgets that need to update themselves, for instance when part of a widget is exposed because a covering widget was moved. Is a virtual member function of qwidget class and it's used to draw on widgets derived. The idea is to just click on canvas drag the mouse and draw a rect. On linux the video is displayed, but occasionally the widget stops updating. We draw image on the qwidget's paint event, to trigger this we call repaint()/update() whenever a new image is available. But repaint () in mousemoveevent doesn't call/trigger paintevent. Only my manual update(), repaint() calls fail. You missed to call the base class qmainwindow::event() in the coloursampler::event(), which will cause the whole qobject (and qwidget). I have a class that extends qmainwindow and i overrode the paintevent method, but it never gets called. Implement a qtimer to trigger update() or repaint() every 500ms.

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