align column of QTableView in pyqt5

I have this code

Code:

---

class ManifestModel(QtSql.QSqlTableModel):
 
	def __init__(self, parent=None, db=QtSql.QSqlDatabase()):
		super(ManifestModel, self).__init__(parent, db)
 
 
	def flags(self, index):
		if (index.column() == 4):
			return QtCore.Qt.ItemIsEnabled
		elif (index.column() == 6):
			return QtCore.Qt.ItemIsEnabled
		elif (index.column() == 3):
			return QtCore.Qt.AlignHCenter		
		else:
			return QtCore.Qt.ItemIsEnabled | QtCore.Qt.ItemIsSelectable | QtCore.Qt.ItemIsEditable

---

when I run it I get an error:

builtins.TypeError: invalid result from ManifestModel.flags(), AlignmentFlag cannot be converted to PyQt5.QtCore.ItemFlags in this context


In the same routine that uses ManifestModel I have the code:

Code:

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ui.label = QtWidgets.QLabel(ui.page)
ui.label.setGeometry(QtCore.QRect(308, 0, 131, 20))
ui.label.setAlignment(QtCore.Qt.AlignCenter)

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So what do I have to do to change the alignment in a QTableView column?

The flags method is for item flags, AlignCenter is not one of those.

If you want to change the text alignment of a cell, you need to return the appropriate alignment value when the data method is called with AlignmentRole.

Cheers,
_

I found this code:

Code:

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QVariant MyModel::data(const QModelIndex& index, int role) const {
        if (index.column() == yourCellIndex && role == Qt::TextAlignmentRole) {
            return Qt::AlignLeft;
        } else {
            return QAbstractTableModel::data(index, role);
        }
    }

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Unfortunately it is in c++ and I don't know how to convert it to python. What does :: mean anyway?

Quote:

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Originally Posted by nlgootee

What does :: mean anyway?

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It's the scope resolution operator for C++, here's a good description: https://en.wikipedia.org/wiki/Scope_resolution_operator.

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Added after 13 minutes:

Quote:

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Originally Posted by nlgootee

Unfortunately it is in c++ and I don't know how to convert it to python.

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You need to create a data method for your ManifestModel class much like you did for the "def flags(index)" method, etc. The following should at least get you started:

Code:

---

class ManifestModel(QtSql.QSqlTableModel):
 
    	def __init__(self, parent=None, db=QtSql.QSqlDatabase()):
    		super(ManifestModel, self).__init__(parent, db)
 
 
    	def flags(self, index):
    		if (index.column() == 4):
    			return QtCore.Qt.ItemIsEnabled
    		elif (index.column() == 6):
    			return QtCore.Qt.ItemIsEnabled
    		else:
    			return QtCore.Qt.ItemIsEnabled | QtCore.Qt.ItemIsSelectable | QtCore.Qt.ItemIsEditable
 
        def data(self, index, role):
                if (index.column() == 2 and role == QtCore.Qt.TextAlignmentRole):
                        return QtCore.Qt.AlignHCenter
                else:
                        return QtSql.QSqlTableModel.data(index, role)

---

The code above approximates the C++ translation to the best of my ability (I don't program in Python), so don't blame me if it requires some tweaking... I hope, however, that it's enough to get you going. :)

You'll find that you have to do this all of the time, where you subclass a Qt provided class and override virual methods defined in the documentation. Regardless of whether or not you know C++, you'll have to be able to read the doc, understand the concepts (ignoring syntax) and know how to translate those concepts into Python code/syntax.

Good luck.

[QUOTE understand the concepts (ignoring syntax) and know how to translate those concepts into Python code/syntax.

Good luck.[/QUOTE]

I gennerally understand the concepts, but I am having a lot of trouble translating them into Python. Python itself is ok, but Pyqt5 has been really hard.

Quote:

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Originally Posted by nlgootee

Python itself is ok, but Pyqt5 has been really hard.

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Given that all of the Qt documentation is specific to C++ (as you already pointed out), I understand and feel your pain... I assume you've google'd around and that there is some level of PyQt training/examples that are available?