ZetCode PyQt4 tutorial widgets II

#!/usr/bin/python
# -*- coding: utf-8 -*-

"""
ZetCode PyQt4 tutorial 

In this example, we dispay an image
on the window. 

author: Jan Bodnar
website: zetcode.com
last edited: September 2011
"""

import sys
from PyQt4 import QtGui, QtCore

class Example(QtGui.QWidget):

    def __init__(self):
        super(Example, self).__init__()

        self.initUI()

    def initUI(self):      

        hbox = QtGui.QHBoxLayout(self)
        # We create a QtGui.QPixmap object. It takes the name of the file as a parameter.
        pixmap = QtGui.QPixmap("redrock.png")

        lbl = QtGui.QLabel(self)
        # We put the pixmap into the QtGui.QLabel widget.
        lbl.setPixmap(pixmap)

        hbox.addWidget(lbl)
        self.setLayout(hbox)

        self.move(300, 200)
        self.setWindowTitle(‘Red Rock‘)
        self.show()        

def main():

    app = QtGui.QApplication(sys.argv)
    ex = Example()
    sys.exit(app.exec_())

if __name__ == ‘__main__‘:
    main()    

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#!/usr/bin/python
# -*- coding: utf-8 -*-

"""
ZetCode PyQt4 tutorial 

This example shows text which
is entered in a QtGui.QLineEdit
in a QtGui.QLabel widget.

author: Jan Bodnar
website: zetcode.com
last edited: August 2011
"""

import sys
from PyQt4 import QtGui, QtCore

class Example(QtGui.QWidget):

    def __init__(self):
        super(Example, self).__init__()

        self.initUI()

    def initUI(self):      

        self.lbl = QtGui.QLabel(self)
        # The QtGui.QLineEdit widget is created.
        qle = QtGui.QLineEdit(self)

        qle.move(60, 100)
        self.lbl.move(60, 40)

        # If the text in the line edit widget changes, we call the onChanged() method.
        qle.textChanged[str].connect(self.onChanged)

        self.setGeometry(300, 300, 280, 170)
        self.setWindowTitle(‘QtGui.QLineEdit‘)
        self.show()

    # Inside the onChanged() method, we set the typed text to the label widget. We call the adjustSize() method to adjust the size of the label to the length of the text.
    def onChanged(self, text):

        self.lbl.setText(text)
        self.lbl.adjustSize()        

def main():

    app = QtGui.QApplication(sys.argv)
    ex = Example()
    sys.exit(app.exec_())

if __name__ == ‘__main__‘:
    main()

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#!/usr/bin/python
# -*- coding: utf-8 -*-

"""
ZetCode PyQt4 tutorial 

This example shows
how to use QtGui.QSplitter widget.

author: Jan Bodnar
website: zetcode.com
last edited: September 2011
"""

import sys
from PyQt4 import QtGui, QtCore

class Example(QtGui.QWidget):

    def __init__(self):
        super(Example, self).__init__()

        self.initUI()

    def initUI(self):      

        hbox = QtGui.QHBoxLayout(self)

        # We use a styled frame in order to see the boundaries between the QtGui.QFrame widgets.
        topleft = QtGui.QFrame(self)
        topleft.setFrameShape(QtGui.QFrame.StyledPanel)

        topright = QtGui.QFrame(self)
        topright.setFrameShape(QtGui.QFrame.StyledPanel)

        bottom = QtGui.QFrame(self)
        bottom.setFrameShape(QtGui.QFrame.StyledPanel)

        # We create a QtGui.QSplitter widget and add two frames into it.
        splitter1 = QtGui.QSplitter(QtCore.Qt.Horizontal)
        splitter1.addWidget(topleft)
        splitter1.addWidget(topright)

        # We can also add a splitter to another splitter widget.
        splitter2 = QtGui.QSplitter(QtCore.Qt.Vertical)
        splitter2.addWidget(splitter1)
        splitter2.addWidget(bottom)

        hbox.addWidget(splitter2)
        self.setLayout(hbox)
        QtGui.QApplication.setStyle(QtGui.QStyleFactory.create(‘Cleanlooks‘))

        self.setGeometry(300, 300, 300, 200)
        self.setWindowTitle(‘QtGui.QSplitter‘)
        self.show()

def main():

    app = QtGui.QApplication(sys.argv)
    ex = Example()
    sys.exit(app.exec_())

if __name__ == ‘__main__‘:
    main()    

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#!/usr/bin/python
# -*- coding: utf-8 -*-

"""
ZetCode PyQt4 tutorial 

This example shows
how to use QtGui.QComboBox widget.

author: Jan Bodnar
website: zetcode.com
last edited: September 2011
"""

import sys
from PyQt4 import QtGui, QtCore

class Example(QtGui.QWidget):

    def __init__(self):
        super(Example, self).__init__()

        self.initUI()

    def initUI(self):      

        self.lbl = QtGui.QLabel("Ubuntu", self)

        # We create a QtGui.QComboBox widget with five options.
        combo = QtGui.QComboBox(self)
        combo.addItem("Ubuntu")
        combo.addItem("Mandriva")
        combo.addItem("Fedora")
        combo.addItem("Red Hat")
        combo.addItem("Gentoo")

        combo.move(50, 50)
        self.lbl.move(50, 150)

        # Upon an item selection, we call the onActivated() method.
        combo.activated[str].connect(self.onActivated)        

        self.setGeometry(300, 300, 300, 200)
        self.setWindowTitle(‘QtGui.QComboBox‘)
        self.show()

    # Inside the method, we set the text of the chosen item to the label widget. We adjust the size of the label.
    def onActivated(self, text):

        self.lbl.setText(text)
        self.lbl.adjustSize()  

def main():

    app = QtGui.QApplication(sys.argv)
    ex = Example()
    sys.exit(app.exec_())

if __name__ == ‘__main__‘:
    main()