How to change font size of child QLabel widget from the groupBox
Solution 1
While I was waiting for an answer I wanted to give it a try and found this method/solution for my question:
self.Voltage_Label = []
self.Voltage_Label.append(QtGui.QLabel("voltage1 ")) # i need to have diff Font & size for these
self.Voltage_Label.append(QtGui.QLabel("voltage2 "))
self.Voltage_Label.append(QtGui.QLabel("voltage3 "))
.
.
for i in xrange(5):
newfont = QtGui.QFont("Times", 8, QtGui.QFont.Bold)
self.Voltage_Label[i].setFont(newfont)
Solution 2
You were trying to invoke the method setFont()
of an object of the class list
(which hasn't this method), not of the QtGui.QLabel
object.
You can use a list comprehension for a better scalability and performance:
voltages = ["voltage1 ", "voltage2 ", "voltage3 "]
# Populates the list with QLabel objects
self.Voltage_Label = [QtGui.QLabel(x) for x in voltages]
# Invokes setFont() for each object
[x.setFont(QtGui.QFont("Times", 8, QtGui.QFont.Bold)) for x in self.Voltage_Label]
If you need more voltage labels you only have to modify the list voltages
.
And then even:
[vbox.addWidget(self.Voltage_Label[i], i, 0) for i in range(len(self.Voltage_Label))]
Solution 3
also, you can try
font = QtGui.QFont("Times", 8, QtGui.QFont.Bold)
[label.setFont(font) for label in self.Voltage_Label]
if you are creating a font object every time you iterate over an item of self.Voltage_Label
it will cost you some memory. so, therefore, you can share the same one with all the labels. whenever memory matters you can use this technique. but if you want to change the font on all label
objects it won't change the font in other QLabel
objects.
user2345
Updated on August 11, 2022Comments
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user2345 almost 2 years
How can use different font & size for the child Widgets in the GroupBox and the tittle for the GroupBox in python
def panel(self): groupBox = QtGui.QGroupBox("voltage Monitor") groupBox.setFont(QtGui.QFont('SansSerif', 13)) # the title size is good .. self.Voltage_Label = [] .. vbox = QtGui.QGridLayout() self.Voltage_Label.append(QtGui.QLabel("voltage1 ")) # i need to have diff Font & size for these self.Voltage_Label.append(QtGui.QLabel("voltage2 ")) self.Voltage_Label.append(QtGui.QLabel("voltage3 ")) .. vbox.addWidget(self.Voltage_Label[i], i, 0) .. groupBox.setLayout(vbox) return groupBox
I tired this
self.Voltage_Label.setFont(QtGui.QFont('SansSerif', 10))
I get this error
!! self.Voltage_Label.setFont(QtGui.QFont('SansSerif', 10)) AttributeError: 'list' object has no attribute 'setFont' !!
but for something like this
title1 = QtGui.QLabel("Sample Title")
as a child widget i can change it bytitle1.setFont(QtGui.QFont('SansSerif', 10))
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Nic3500 about 4 yearsWhile this code may answer the question, providing additional context regarding why and/or how this code answers the question improves its long-term value.
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greendino over 3 yearsthis doesn't change the fonts while ui setup already rendered