How to vertically center a single-line in a QTextEdit instance (PySide/PyQt)?

Question

I have a line editor that inherits from QTextEdit, and I am using it to edit view items that show rich text. The second parameter for QTextEdit.setAlignme

Answer 1

For a single-line edit centred vertically, you just need to calculate a correct fixed height.

Using the example delegate from your previous question, it can be achieved like this:

class RichTextLineEdit(QtGui.QTextEdit):   
    def __init__(self, parent=None):
        ...    
        margin = 1
        self.document().setDocumentMargin(margin)
        fontMetrics = QtGui.QFontMetrics(self.font())
        height = fontMetrics.height() + (margin + self.frameWidth()) * 2
        self.setFixedHeight(height)

(NB: the reimplemented sizeHint and minimumSizeHint methods are probably redundant in the original example).