[SOLVED] QLineEdit_object.setFocus() not working at startup?

ubleha

I'm trying to set the focus on QLineEdit widget at app startup but for some reasons it fails. Calling the method which includes the QLineEdit_object.setFocus() and is bound to a button click, works perfectly. However on startup, it seems like it doesn't execute at all when set to initialize after widget creation.

Code example:

@import sys
import PySide.QtGui as QG
import PySide.QtCore as QC

class GG(QG.QMainWindow):
def init(self):
super(GG, self).init()
self.move(0,0)
self.resize(400,300)
self.setWindowTitle('Demo')

    self.tabw = QG.QTabWidget()
    self.tab1 = Tab1()
    self.tab2 = Tab2()

    self.tabw.addTab(self.tab1, 'Tab1')
    self.tabw.addTab(self.tab2, 'Tab2')

    hbox = QG.QHBoxLayout()
    hbox.addWidget(self.tabw)

    self.setCentralWidget(self.tabw)
    self.setLayout(hbox)
    self.show()

class Tab1(QG.QWidget):
def init(self):
super(Tab1, self).init()

    self.btns()
    self.inputt()
    self.layoutz()
    self.inp.setFocus() # doesn't set the focus on startup ?
    self.show()

def inputt(self):
    self.inp = QG.QLineEdit('', self)

def btns(self):
    self.btn1 = QG.QPushButton('Button1', self)
    self.btn1.clicked.connect(self.focusit) # works just fine

def layoutz(self):
    vbox = QG.QVBoxLayout()   
    vbox.addWidget(self.btn1)
    vbox.addStretch(1)
    vbox.addWidget(self.inp)
    self.setLayout(vbox)

def focusit(self):
    self.inp.setFocus() # works just fine

class Tab2(Tab1):
def init(self):
super(Tab2, self).init()

def main():
app = QG.QApplication(sys.argv)
a = GG()
sys.exit(app.exec_())

if name == 'main':
main()@

Chris Kawa

Hi, welcome to devnet

AFAIK you can't set focus to a widget that is not visible. Try to show it first.

ubleha

I managed to set the focus properly from QMainWindow widget by:

@self.tab2.inp.setFocus()
self.tab1.inp.setFocus()@

For some reason the order of calling setFocus() matters and only works if is reversed to creation order.