PyQt / PySide -小部件的实际大小

Question

我在Qt Designer中制作了一个包含QLineEdit的小工具。根据Qt Designer的说法，QLineEdit的高度是25 (对象属性，在几何图形下)。当我打印小工具的屏幕并测量实际像素大小时，它实际上是25像素。问题是，当我尝试用python代码读取QLineEdit的高度时，它显示为30。这是我尝试过的：

print self.subject_text.height()
print self.subject_text.geometry().height()
print self.subject_text.frameGeometry().height()
print self.subject_text.size()
print self.subject_text.frameSize().height()
print self.subject_text.rect()

他们都说是30。我想做同样高度的QPushButton，它比QLineEdit高5个像素。有没有办法读取QLineEdit的实际高度，即25？

我使用的是PySide 1.2.4，Python2.7.10 32位，Windows7。

Answer 1

我发现了如何：

self.subject_text.sizeHint().height()

它给出了QLineEdit的实际高度。

Answer 2

#This is the example code for Edit the Height of the widget.
#If your are not expecting this answer, sorry.
#It is PyQt4, but you can try with PySide with small changes.

import sys
from PyQt4 import QtGui
from PyQt4 import QtCore

class Window (QtGui.QWidget):
    def __init__(self, parent=None):        

        super(Window, self).__init__(parent)        

        self.verticalLayout     = QtGui.QVBoxLayout (self)
        self.verticalLayout.setObjectName ('verticalLayout')

        self.label = QtGui.QLabel(self)
        self.label.setObjectName('label')
        self.label.setText('Height')            

        self.spinBox = QtGui.QSpinBox(self)
        self.spinBox.setButtonSymbols(QtGui.QAbstractSpinBox.NoButtons)
        self.spinBox.setObjectName('spinBox')
        self.spinBox.setValue(20)       
        self.spinBox.setMaximum (1000)

        self.pushButton = QtGui.QPushButton(self)
        self.pushButton.setText('Apply') 

        self.horizontalLayout = QtGui.QHBoxLayout()
        self.horizontalLayout.setObjectName('horizontalLayout')
        self.horizontalLayout.addWidget(self.label)
        self.horizontalLayout.addWidget(self.spinBox)
        self.horizontalLayout.addWidget(self.pushButton)

        self.lineEdit = QtGui.QLineEdit(self)
        self.lineEdit.setObjectName('lineEdit')   

        self.pushButton_1 = QtGui.QPushButton(self)
        self.pushButton_1.setText('>')            

        self.pushButton_2 = QtGui.QPushButton(self)
        self.pushButton_2.setObjectName('pushButton_2') 
        self.pushButton_2.setText('20') 

        self.horizontalLayout_1 = QtGui.QHBoxLayout()
        self.horizontalLayout_1.setObjectName('horizontalLayout')
        self.horizontalLayout_1.addWidget(self.lineEdit)
        self.horizontalLayout_1.addWidget(self.pushButton_1)
        self.horizontalLayout_1.addWidget(self.pushButton_2)  

        self.verticalLayout.addLayout(self.horizontalLayout)
        self.verticalLayout.addLayout(self.horizontalLayout_1)

        self.pushButton.clicked.connect (self.applyToLineEdit)
        self.pushButton_1.clicked.connect (self.editPushButton)

    def applyToLineEdit (self) :        
        currentSize     = self.lineEdit.geometry ()
        currentValue    = self.spinBox.value() 

        w               = currentSize.width()
        #h               = currentSize.height()
        h               = currentValue        
        x               = currentSize.x()
        z               = currentSize.y()

        self.lineEdit.setGeometry (QtCore.QRect (w, h, x, z))
        self.lineEdit.setText ('My Height is %s'%str(h ))

        #The below line because of self.lineEdit is under the horizontalLayout, either not necessary 
        self.lineEdit.setMinimumSize (QtCore.QSize(0, h))


    def editPushButton (self) :
        currentSize     = self.lineEdit.geometry ()       
        w               = currentSize.width()
        h               = currentSize.height()
        x               = currentSize.x()
        z               = currentSize.y()

        self.pushButton_2.setGeometry (QtCore.QRect (w, h, x, z))
        self.pushButton_2.setText (str(h))

        #The below line because of self.lineEdit is under the horizontalLayout, either not necessary 
        self.pushButton_2.setMinimumSize (QtCore.QSize(0, h))

if __name__ == '__main__':
    app = QtGui.QApplication(sys.argv)
    w = Window()
    w.show()
    sys.exit(app.exec_())