I am working with a GUI based on PySide. I made a (one line) text box with QLineEdit and the input is just four characters long, a restriction I already successfully applied.
The problem is I have a wider than needed text box (i.e. there is a lot of unused space after the text). How can I shorten the length of the text box?
I know this is something that is easily fixed by designing the text box with Designer; however, this particular text box is not created in Designer.
Looking at the source of QLineEdit.sizeHint() one sees that a line edit is typically wide enough to display 17 latin "x" characters. I tried to replicate this in Python and change it to display 4 characters but I failed in getting the style dependent margins of the line edit correctly due to limitations of the Python binding of Qt.
A simple:
e = QtGui.QLineEdit()
fm = e.fontMetrics()
m = e.textMargins()
c = e.contentsMargins()
w = 4*fm.width('x')+m.left()+m.right()+c.left()+c.right()
is returning 24 in my case which however is not enough to display four characters like "abcd" in a QLineEdit. A better value would be about 32 which you can set for example like.
e.setMaximumWidth(w+8) # mysterious additional factor required
which might still be okay even if the font is changed on many systems.
If what you want is modify your QLineEdit width and fix it, use:
#setFixedWidth(int w)
MyLineEdit.setFixedWidth(120)
