QStyleOptionViewItem.rect

MasterQ

Hello from a Python beginner,

I have to subclass QStyledItemDelegate. In method updateEditorGeometry the following code is marked

    def updateEditorGeometry(self, editor: QWidget, option: QStyleOptionViewItem, index: QModelIndex):
        rect = option.rect() # <- IDE is claiming rect() is no method of QStyleOptionViewItem
        rect.setWidth(option.rect().width + 100)
        editor.setGeometry(rect)

According to my IDE (PyCharm) the class QStyleOptionViewItem has (in Python) no method rect(). That's "true" since rect() is a method of its super class QStyleOption .

How to access rect() (or is it rec?) from QStyleOptionViewItem?

J.

BTW:

the C++ pendant is working:

    void CategoryDelegate::updateEditorGeometry(QWidget *editor,
                                                       const QStyleOptionViewItem &option,
                                                       const QModelIndex &index) const {
        auto rect = option.rect;
        rect.setWidth(option.rect.width() + 100);
        editor->setGeometry(rect);

JonB

@MasterQ said in QStyleOptionViewItem.rect:

no, there is really no rect, see the documentation of PySide I provided. The IDE is right!

No, there is indeed a rect member!

I agree under PySide6, however it is implemented, IDEs do not see QStyleOptionViewItem.rect nor the QStyleOption.rect which is what it is (inherited). Something to do with shiboken I think. Tested under PyCharm, the only/best IDE I trust.
However whatever the IDE says the PySide6 code with option.rect does work at runtime, and accesses the rect.
Under PyQt6 (in PyCharm) the IDE does find QStyleOptionViewItem.rect. And it's in __PyQt6_sip.simplewrapper, which is PyQt only.

So the IDE problem is PySide only, and will have something to do with its implementation there (e.g. not being constructed till runtime, which I found with something else recently where IDE could not find a symbol). [Oh yes, that is the implementation of PySide still supporting all the old enums, Qt.AlightLeft, where you should now use the new ones, Qt.AllignFlag.AlignLeft. PySide6 creates the former "aliases" dynamically at runtime, so they work but the IDE does not know that and says they don't exist.]

@SGaist
While runtime behaviour is fine this is a code-time "limitation" of PySide implementation. Whether that is a "bug" or (as I suspect) a "feature" of the PySide implementation, and hence not worth reporting, I do not know. There are other places in Python/PySide/PyQt where things get created at runtime and so are not visible at IDE edit time as part of the implementation.

SGaist

Hi,

The hint is correct. rect is not a method it's a public variable. Just use it directly.

MasterQ

neither rect nor rect() is recognized

see documentation:

class QStyleOptionViewItem

and

class QStyleOption

this mechanism of PySide seems significantly different to that of C++. Since the PySide documentation seems to be a robot translation from C++, it is not really helpfull.

I don't get it, how PySide is working here.

MasterQ

Maybe this way?

    def updateEditorGeometry(self, editor: QWidget, option: QStyleOptionViewItem, index: QModelIndex):
        g = editor.geometry()
        g.setWidth(g.width() + 100)
        editor.setGeometry(g)

jsulm

@MasterQ said in QStyleOptionViewItem.rect:

neither rect nor rect() is recognized

But does it actually work when you run the application?

MasterQ

no, there is really no rect, see the documentation of PySide I provided. The IDE is right!

SGaist

Can you provide a minimal runable script that shows this ?
Creating a QStyleOptionViewItem manually works.

>>> from PySide6.QtWidgets import QStyleOptionViewItem
>>> option = QStyleOptionViewItem()
>>> option.rect
PySide6.QtCore.QRect(0, 0, 0, 0)
>>>

JonB

@MasterQ said in QStyleOptionViewItem.rect:

no, there is really no rect, see the documentation of PySide I provided. The IDE is right!

No, there is indeed a rect member!

I agree under PySide6, however it is implemented, IDEs do not see QStyleOptionViewItem.rect nor the QStyleOption.rect which is what it is (inherited). Something to do with shiboken I think. Tested under PyCharm, the only/best IDE I trust.
However whatever the IDE says the PySide6 code with option.rect does work at runtime, and accesses the rect.
Under PyQt6 (in PyCharm) the IDE does find QStyleOptionViewItem.rect. And it's in __PyQt6_sip.simplewrapper, which is PyQt only.

So the IDE problem is PySide only, and will have something to do with its implementation there (e.g. not being constructed till runtime, which I found with something else recently where IDE could not find a symbol). [Oh yes, that is the implementation of PySide still supporting all the old enums, Qt.AlightLeft, where you should now use the new ones, Qt.AllignFlag.AlignLeft. PySide6 creates the former "aliases" dynamically at runtime, so they work but the IDE does not know that and says they don't exist.]

@SGaist
While runtime behaviour is fine this is a code-time "limitation" of PySide implementation. Whether that is a "bug" or (as I suspect) a "feature" of the PySide implementation, and hence not worth reporting, I do not know. There are other places in Python/PySide/PyQt where things get created at runtime and so are not visible at IDE edit time as part of the implementation.

MasterQ

@JonB said in QStyleOptionViewItem.rect:

@MasterQ said in QStyleOptionViewItem.rect:

no, there is really no rect, see the documentation of PySide I provided. The IDE is right!

No, there is indeed a rect member!

Thank you for that information.

My last tests confirm your answer, I was wrong about missing rect. Sry for the confusion.