PySide学习笔记第十章－窗体小部件（widget）－下篇

本章会涉及 QtGui.QPixmap , QtGui.QLineEdit, QtGui.QSplitter and QtGui.QComboBox.等widget

一、QtGui.QPixmap 是一个操作图像的工具，是用来在屏幕上显示图像的

# -*- coding: utf-8 -*-

"""
ZetCode PySide tutorial
In this example, we dispay an image
on the window.
author: Jan Bodnar
website: zetcode.com
last edited: August 2011
"""
import sys
from PySide import QtGui, QtCore

class Example(QtGui.QWidget):
def __init__(self):
super(Example, self).__init__()

self.initUI()

def initUI(self):
hbox = QtGui.QHBoxLayout(self)
pixmap = QtGui.QPixmap("play.png") # 加载图像为QPixmap对象

lbl = QtGui.QLabel(self)
lbl.setPixmap(pixmap) # 构造lable对象并显示该图像

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

self.setGeometry(300, 300, 280, 170)
self.setWindowTitle('Red Rock')
self.show()

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

if __name__ == '__main__':
main()

二、QtGui.QLineEdit行编辑器，允许编辑或者输入一行纯文本，支持取消，剪切，黏贴，拖拽等操作

# -*- coding: utf-8 -*-

"""
ZetCode PySide 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 PySide import QtGui, QtCore

class Example(QtGui.QWidget):
def __init__(self):
super(Example, self).__init__()

self.initUI()

def initUI(self):
self.lbl = QtGui.QLabel(self) # 构造一个lable用于显示行编辑器输入的结果
qle = QtGui.QLineEdit(self) # 构造一个行编辑器

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

qle.textChanged[str].connect(self.onChanged) # 将文本发生变化的信号和self.onChanged函数槽联系起来

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

def onChanged(self, text): # 自定义槽函数

self.lbl.setText(text) # 设置该窗体中lable的文本
self.lbl.adjustSize() # 自动调整lable的大小以适应文本的长度

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

if __name__ == '__main__':
main()

三、QtGui.QSplitter分割板小工具，可以让我自动调节子窗口的大小，在该示例中我们用了3个frame 控件以及2个splitter分割板控件

# -*- coding: utf-8 -*-

"""
ZetCode PySide tutorial
This example shows
how to use QtGui.QSplitter widget.
author: Jan Bodnar
website: zetcode.com
last edited: August 2011
"""
import sys
from PySide import QtGui, QtCore

class Example(QtGui.QWidget):
def __init__(self):
super(Example, self).__init__()

self.initUI()

def initUI(self):
hbox = QtGui.QHBoxLayout(self)

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)

splitter1 = QtGui.QSplitter(QtCore.Qt.Horizontal)
splitter1.addWidget(topleft)
splitter1.addWidget(topright)

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 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()

四、组合框，下拉列表框

# -*- coding: utf-8 -*-

"""
ZetCode PySide tutorial
This example shows
how to use QtGui.QComboBox widget.
author: Jan Bodnar
website: zetcode.com
last edited: August 2011
"""
import sys
from PySide 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)

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)

combo.activated[str].connect(self.onActivated)

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

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()