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Thread: Drag and Drop with Qt Quick and QWidgets

  1. #1
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    Default Drag and Drop with Qt Quick and QWidgets

    I’m upgrading my application from Qt 4.8 to Qt 5.1, with Qt Quick 2.1.

    I used to display a QML view in my mostly widget based application, on top of QDeclarativeView.

    Originally I subclassed QDeclarativeView to add drag/drop functionality, so I could drop on top of the view and respond to it in my code.

    To get the new QQuickView into a QWidget, I see I have the QWidget::createWindowContainer() method.

    However, I get a specific QWidget* from this method and I'm not sure how to go about getting the drop functionality I require for my application.

    Can anyone please advise here?

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    Default Re: Drag and Drop with Qt Quick and QWidgets

    I don't think it is possible to give you advice without understanding first how you implemented drag and drop.
    Your biological and technological distinctiveness will be added to our own. Resistance is futile.

    Please ask Qt related questions on the forum and not using private messages or visitor messages.


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    Default Re: Drag and Drop with Qt Quick and QWidgets

    Thanks for responding wysota,

    You mean in my previous solution?

    The QDeclarativeView was a subclass of QWidget, so I subclassed it, put in setAcceptDrops(true) in the constructor and implemented the methods for the drag and drop events. Actually my "drop" just emitted a signal, and the manipulation of the QML was done separately - but with the current system I can't find how to even get these events handled. I mean, I just want to have a point when I know that something is being dragged onto the widget the ends up displaying the QQuickView, so I can handle that.

    Is this any more clear now?

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    Default Re: Drag and Drop with Qt Quick and QWidgets

    createWindowContainer() returns a QWidget instance. You can install an event filter on it and try to intercept d&d events there. If it doesn't work, you can try intercepting events by subclassing the window class and reimplementing event(). If that doesn't work as well then... I suggest you file a bug report
    Your biological and technological distinctiveness will be added to our own. Resistance is futile.

    Please ask Qt related questions on the forum and not using private messages or visitor messages.


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