[PyQt4] QTableWidget Readonly?

Daniel26

Hello,

is it possible to make a QTableWidget readonly so the user cannot edit cells?
I wan't to show some configs, each line with 3 parameters so every line represents a config set.
To edit or delete a set the user should use the dialog I create, he should not edit the Table directly.

Regards

Daniel

SGaist

Hi and welcome to devnet,

Sure thing, use the setFlags method of QTableWidgetItem and Qt.ItemIsEditable flag.

Daniel26

@SGaist said in [PyQt4] QTableWIdget Readonly?:

Qt.ItemIsEditable

Hello,

so I have to set Widget.setFlags( QtCore.Qt.ItemIsSelectable | QtCore.Qt.ItemIsEnabled )?
Thats all?
Is there an overview over the flags?
Regards

Daniel

jsulm

@Daniel26 said in [PyQt4] QTableWidget Readonly?:

Is there an overview over the flags?

Yes, in the link @SGaist posted

J.Hilk

@Daniel26 said in [PyQt4] QTableWidget Readonly?:

so I have to set Widget.setFlags( QtCore.Qt.ItemIsSelectable | QtCore.Qt.ItemIsEnabled )?

I assume this is a typo, because @SGaist said Qt.ItemIsEditable

Daniel26

@J-Hilk I don't want it editable, so I didn't set Qt.ItemIsEditable.
Or is that wrong?

@jsulm In the link I Can't find an overview of the QT-Flags.

Regards

Daniel

jsulm

@Daniel26 You need to click on Qt::ItemFlags: https://doc.qt.io/qt-5/qt.html#ItemFlag-enum

JonB

@Daniel26 said in [PyQt4] QTableWidget Readonly?:

so I have to set Widget.setFlags( QtCore.Qt.ItemIsSelectable | QtCore.Qt.ItemIsEnabled )?

You can do this, if you know you want it to be selectable and enabled. A more robust/generic to just switch off editable, no matter what other flags are already there, is:

twi.setFlags(twi.flags() & ~QtCore.Qt.ItemIsEditable)

Daniel26

@JonB
"~" Removes? Ok, thanks.

@jsulm Thanks for the link.

Daniel26

@JonB
self.addip_tw.setFlags(self.addip_tw.flags() & ~QtCore.Qt.ItemIsEditable)
AttributeError: 'QTableWidget' object has no attribute 'setFlags'

What did I wrong? Is setFlags Qt5 only?

Regards

Daniel

JonB

@Daniel26
As @SGaist gave you the link earlier, https://doc.qt.io/qt-5/qtablewidgetitem.html#setFlags is a method of each QTableWidgetItem. I imagine your self.addip_tw is the whole of the QTableWidget, not a QTableWidgetItem as my variable twi is intended to be.

Daniel26

Ok, sorry for that stupid question, but I'm new to pyQt and object orientated programming.
QTableWidgetItem is only a cell of the QTableWidget? is that correct?

I create an instance of QTableWidget as self.addip_tw and added the self.addip_tw to a QGridLayout.
So I have to do the setFlags for every cell in my Table?

SGaist

@Daniel26 said in [PyQt4] QTableWidget Readonly?:

QTableWidgetItem is only a cell of the QTableWidget? is that correct?

Not exactly, it's an object that will be stored in the model coming with QTableWidget and provide all the necessary data to be rendered by a cell of the table.

A QTableWidget is a QTableView + a model all packed in one.

You should check the Model/View Programming chapter in Qt's documentation for a good overview of how it is working.

Daniel26

Ok,

so I set every Cell with an empty QWidgetItem so I can set it to readOnly?

I'm totally confused....

JonB

@Daniel26
You can indeed do it as @Denni-0 has said. To my mind, it doesn't really make the cells read-only, but it does stop the user doing anything to edit :) And it's only one line!

For making the items not-editable, you could look at the code in https://stackoverflow.com/questions/7727863/how-to-make-a-cell-in-a-qtablewidget-read-only/ which is the accepted solution. Other answers there also show @Denni-0 's approach.

Daniel26

hello @ all,

thanks for the help. I've got it, did it with the QTableWidget.
But how can I check, if a column is empty?
A simple "if self.addip_tw.item(x,y)" won't work :)

Regards

Daniel

JonB

@Daniel26
What do you mean by "if a column is empty"? Plus, why do you care if you are choosing to go for the simplest QTreeView.setEditTriggers(QAbstractItemView.NoEditTriggers)?

Daniel26

Sorry, I ment if a cell is empty.

I store the content of the cells into a dictionary, but only if the first cell of the line is not empty.

JonB

@Daniel26
The I don't understand why you say

A simple "if self.addip_tw.item(x,y)" won't work :)

since https://doc.qt.io/qt-5/qtablewidget.html#item does return nullptr for no item.

Daniel26

@JonB
if self.addip_tw.item[row,0]:
TypeError: 'builtin_function_or_method' object has no attribute 'getitem'