Resizing QWidget inside QMainWindow

[Panupat Chongstitwattana]

I'm trying to add QWidget to a QMainWindow but I cannot figure out how to make it resize properly.

Top - if I show the widget by itself.

Bottom - the widget added to QMainWindow. 

Am I doing something wrong?

class LayerInfoWidget(QtGui.QWidget):
    def __init__(self, parent = None):
        super(LayerInfoWidget, self).__init__(parent)
       
        self.hLayout = QtGui.QHBoxLayout(self)



        self.label = QtGui.QLabel(self)

        self.label.setText('Pass Name Here')
       
        self.enabled = QtGui.QCheckBox(self)
        self.enabled.setChecked(True)
       
        self.frameList = QtGui.QLineEdit(self)
        self.frameList.setText('1-10')
       
        self.passName = QtGui.QLineEdit(self)
        self.passName.setText('Filename - PASS')
       
        self.hLayout.addWidget(self.label)
        self.hLayout.addWidget(self.enabled)
        self.hLayout.addWidget(self.frameList)
        self.hLayout.addWidget(self.passName)
       
        self.setLayout(self.hLayout)
       


mainwin = QtGui.QMainWindow()
vLayout = QtGui.QVBoxLayout(mainwin)
mywidget = LayerInfoWidget(parent=mainwin)
vLayout.addWidget(mywidget)
mainwin.setLayout(vLayout)

mainwin.show()
mainwin.raise_()

[Marcus Ottosson]

QMainWindow is for special circumstances where the layout and contents of your window fits with the Qt concept of what a “Main Window” is, which is this.

• http://doc.qt.io/qt-5/qmainwindow.html#details

If you aren’t interested in most of that, then QDialog is probably what you want instead.

To answer your question, you’ll need to assign the “central widget”, like this:

...

centralwidget = QtGui.QWidget()  
mainwin = QtGui.QMainWindow()
mainwin.setCentralWidget(centralwidget)

vLayout = QtGui.QVBoxLayout(centralwidget)
mywidget = LayerInfoWidget(parent=mainwin)
vLayout.addWidget(mywidget)

mainwin.show()
mainwin.raise_()

​

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