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Forum Update on Monday, May 27th 2025

QLPreviewView cannot display after insert to QStackedWidget

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  • I Offline
    I Offline
    iwant
    wrote on last edited by
    #1

    I'm trying to use QLPreviewView to preview keynote/PDF file on mac.
    I found it's work fine to insert a QLPreviewView into a QWidget , code like:

    QWidget* widget = new QWidget();
    widget->setGeometry(0, 0, 500, 500);
    NSView* nativeView = reinterpret_cast<NSView*>(widget->winId());
    [nativeView addSubView: myQLPreviewView];
    widget->show();
    

    But when I tryed to insert the widget into a QStackedWidget, I found that nothing displayed at last:

    QStackedWidget* sw= new QStackedWidget();
    sw->setGeometry(0, 0, 500, 500);
    sw->insertWidget(0, widget)
    sw->setCurrentIndex(0);
    sw->show();
    

    Here is the different from Debug View Hierarchy:
    Insert to qwidget:
    b438d2ac-e544-47d4-adca-7485b4f66913.png

    After insert widget(with QLPreviewView) to QStackedWidget:
    680223e7-0887-4b4d-92a1-6eb9c589d714.png

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    • SGaistS Offline
      SGaistS Offline
      SGaist
      Lifetime Qt Champion
      wrote on last edited by
      #2

      Hi and welcome to devnet,

      What is QLPreviewView ?

      Interested in AI ? www.idiap.ch
      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

      1 Reply Last reply
      0
      • C Offline
        C Offline
        ChrisW67
        wrote on last edited by
        #3

        Seems to be an Apple OS widget: QL = Quick Look

        1 Reply Last reply
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