QDialog and Multithreading within PYQT5

[xtlc]

Thanks for you answer. So I can just add a line "QCoreApplication.processEvents()" after the QDialog is initiated (that would be line 34 here)?

My second question is still puzzeling me: How do I get a list of all labels, buttons and so on for my Ui_Dialog? It dos not have a children/findchildren method.

[d_stranz]

So I can just add a line "QCoreApplication.processEvents()" after the QDialog is initiated (that would be line 34 here)?

Probably would have no effect there, since nothing has happened yet in your worker thread. I would try it at the end of "postResult()".

How do I get a list of all labels, buttons and so on for my Ui_Dialog?

If you created the dialog's .ui file using Qt Designer, then you (or Qt Designer) would have defined a variable for every QWidget in your dialog (QLabel, QLineEdit, etc.). Open the .ui file in Qt Designer and select any widget. At the top of the Property Editor panel (Execute the View->Property Editor menu command if you don't see it), there will be a QObject entry. Under that is the "objectName" property. This is the name assigned to the widget variable. You can change this to anything you want that is more meaningful ("statusLabel" instead of "label_4" for instance). After all, will you remember next week which label "label_4" refers to?

Since you are adding the ui into your dialog class by composition (i.e. there is a "ui" member variable for the Ui_Dialog class), then you access the label as "self.ui.statusLabel".

[xtlc]

First: Thanks for your time. And thanks for the hint with processEvents. That worked! Here I think I was not clear enough in what I wanted to know:

Since you are adding the ui into your dialog class by composition (i.e. there is a "ui" member variable for the Ui_Dialog class), then you access the label as "self.ui.statusLabel".

I want to get ALL labels of the Ui_Dialog class - something like

Ui_Dialog.findChildren(QWidgets.QLabel)

Ui_Dialog.findChildren(QWidgets.QLabel)

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if I wanted to find all QLabels ... but this only works for the resultWindow method. How does it work on the Ui_Dialog?

dir(Ui_Dialog)

dir(Ui_Dialog)

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shows no method Children/findChildren.

[d_stranz]

The documentation for QObject::findChildren() says that the first argument should be a QString that names the type (ie. class) of the widgets you want to retrieve.

In C++, this is implemented using templates, as the documentation shows. I do not know how this is done in python.

In addition, you are using the name of your class (Ui_Dialog), not the name of the variable that implements that class in your dialog. So at a minimum, your code should look something like this:

self.ui.findChildren( QWidgets.QLabel )

self.ui.findChildren( QWidgets.QLabel )

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assuming QWidgets.QLabel is the correct syntax for the argument. Perhaps it should be "QWidgets.QLabel" (ie. a quoted string) instead.

Or maybe you don't need the "ui" variable at all:

self.findChildren( QWidgets.QLabel )

self.findChildren( QWidgets.QLabel )

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where "self" is your Dialog class instance.