CODEWITHSUNDEEP
pythonqtpyqt
Nathan W
Nathan W

Reputation: 55472

findChild returns None with custom widget

I have created a custom Qt widget in Python and managed to get it to load into the form at runtime however when I try and use findChild to grab it back of the form instance I get None back.

The widget is loaded and I can see it if I print out the names and objects on the form:

DEBUG:root:<PyQt4.QtGui.QCheckBox object at 0x11358030>
DEBUG:root:Near_Other_Infrastructure
DEBUG:root:<PyQt4.QtGui.QCheckBox object at 0x113582B8>
DEBUG:root:photo
DEBUG:root:<imagewidget.QMapImageWidget object at 0x113586A8>

This is the code:

images = self.forminstance.findChild(QMapImageWidget)

Update:

Seems doing this works:

images = self.forminstance.findChild(QWidget, "photo")

and it returns DEBUG:root:<imagewidget.QMapImageWidget object at 0x113586A8>

although I would really perfer to just get the control via the type without using the name.

Any ideas?

Upvotes: 1

Views: 1542

Answers (1)

Adrian Maire
Adrian Maire

Reputation: 14815

I also had this problem.

One easy solution is to find a non-custom base class and cast.

Custom* ptr = dynamic_cast<QWidget*>(root->findChild<QWidget*>("MyWidgetName"));
if (ptr)
{
    //...whatever
}

Upvotes: 0

Related Questions