PYQT 自动resize 随着内容自动变化长度

下面的 代码，

可以让 label comboBox 等QWidget自动resize、label comboBox
等QWidget随着内容自动变化长度

label comboBox 等QWidget 自动对齐等，截图如下：





代码如下

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

from PyQt4 import QtCore, QtGui
import sys
from mainwin import Ui_MainWindow

try:
_fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
def _fromUtf8(s):
return s

try:
_encoding = QtGui.QApplication.UnicodeUTF8
def _translate(context, text, disambig):
return QtGui.QApplication.translate(context, text, disambig, _encoding)
except AttributeError:
def _translate(context, text, disambig):
return QtGui.QApplication.translate(context, text, disambig)

from PyQt4.QtCore import Qt
from PyQt4.QtGui import QApplication,\
QLabel,\
QFontMetrics,\
QPainter

class MyLabel(QLabel):
def paintEvent( self, event ):
painter = QPainter(self)

metrics = QFontMetrics(self.font())
elided = metrics.elidedText(self.text(), Qt.ElideRight, self.width())

painter.drawText(self.rect(), self.alignment(), elided)

if __name__ == '__main__':
app = QtGui.QApplication(sys.argv)
mainwin = QtGui.QMainWindow()
#ui = Ui_MainWindow()
#ui.setupUi(mainwin)

#centralwidget = QtGui.QWidget(mainwin)

grid = QtGui.QGridLayout()

label = QtGui.QLabel()
txt = "234234"
metrics = QFontMetrics(label.font())
w = metrics.width(txt)
label.setGeometry(QtCore.QRect(20, 20, w, 80))
label.setObjectName(_fromUtf8("label_3"))
label.setText(_translate("MainWindow", txt, None))

grid.addWidget(label, 0, 0)

l = ['123' , '3451111111111111', '1111111111', '0000000000000', '123']
comboBox = QtGui.QComboBox()
txt = (max(l, key=len))
metrics = QFontMetrics(comboBox.font())
w = metrics.width(txt)
comboBox.setGeometry(QtCore.QRect(80, 5, 20, 20))
comboBox.setMinimumWidth(w)

comboBox.setObjectName(_fromUtf8("comboBox_2"))
comboBox.addItems(l)
comboBox.setSizeAdjustPolicy(QtGui.QComboBox.AdjustToContents)

grid.addWidget(comboBox, 0, 1)

label1 = QtGui.QLabel()
txt = "2342341111111111111111"
metrics = QFontMetrics(label1.font())
w = metrics.width(txt)
label1.setGeometry(QtCore.QRect(20, 20, w, 80))
label1.setObjectName(_fromUtf8("label_3"))
label1.setText(_translate("MainWindow", txt, None))

grid.addWidget(label1, 1, 0)

l = ['123' , '3451', '111', '000', '123']
comboBox1 = QtGui.QComboBox()
txt = (max(l, key=len))
metrics = QFontMetrics(comboBox1.font())
w = metrics.width(txt)
comboBox1.setGeometry(QtCore.QRect(80, 5, 20, 20))
comboBox1.setMinimumWidth(w)

comboBox1.setObjectName(_fromUtf8("comboBox_2"))
comboBox1.addItems(l)
comboBox1.setSizeAdjustPolicy(QtGui.QComboBox.AdjustToContents)

grid.addWidget(comboBox1, 1, 1)

l = ['123', '3451', '111', '000', '123']
comboBox2 = QtGui.QComboBox()
txt = (max(l, key=len))
metrics = QFontMetrics(comboBox2.font())
w = metrics.width(txt)
comboBox2.setGeometry(QtCore.QRect(80, 5, 20, 20))
comboBox2.setMinimumWidth(w)

comboBox2.setObjectName(_fromUtf8("comboBox_2"))
comboBox2.addItems(l)
comboBox2.setSizeAdjustPolicy(QtGui.QComboBox.AdjustToContents)
grid.addWidget(comboBox2, 2, 1)

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

#tabWidget = QtGui.QTabWidget(centralwidget)
tabWidget = QtGui.QTabWidget()
tabWidget.setGeometry(QtCore.QRect(20, 20, 500, 500))
tabWidget.setObjectName(_fromUtf8("tabWidget"))
tab = QtGui.QWidget()
tab.setObjectName(_fromUtf8("tab"))
tabWidget.addTab(tab, _fromUtf8(""))
tab_2 = QtGui.QWidget()
tab_2.setObjectName(_fromUtf8("tab_2"))
tabWidget.addTab(tab_2, _fromUtf8(""))

tabWidget.setTabText(tabWidget.indexOf(tab), _translate("MainWindow", "Tab 1", None))
tabWidget.setTabText(tabWidget.indexOf(tab_2), _translate("MainWindow", "Tab 2", None))

tabWidget.setDocumentMode(True)

#tabcentralwidget = QtGui.QWidget(centralwidget)
#tabWidget.setCentralWidget(tabcentralwidget)
#tabcentralwidget.setLayout(grid)

tab.setLayout(grid)

mainwin.setCentralWidget(tabWidget)

mainwin.show()
app.exec_()