如何获取 QLabel 的当前高度？

Question

在这里，标签被切割，imageLabel猫的图片的值为x = 0，y =标签的高度。

layout = QVBoxLayout()

widget = QWidget()

label = QLabel("Lourim Ipsum ...", parent=widget) # LONG TEXT
label.setWordWard(True)

image = QPixmap("cat.png")
imageLabel = QLabel(parent=widget)
imageLabel.setPixmap(image)
imageLabel.setGeometry(0, label.height(), image.width(), image.height())

layout.addWidget(widget)

UPDATE:

我在setWordWrap之后通过做一些数学运算解决了这个问题就像这样

layout = QVBoxLayout()

widget = QWidget()

label = QLabel("Lourim Ipsum ...", parent=widget) # LONG TEXT
label.setWordWard(True)
labe.adjustSize() # THE MOST IMPORTANT LINE

image = QPixmap("cat.png")
imageLabel = QLabel(parent=widget)
imageLabel.setPixmap(image)

Set a constant width as 761 since its the layout's default width and set the height to this

dec = image.width()/761
wid = round(image.width()/dec) # Which will be 761.0 rounded to 761
hei = round(image.height()/dec)
imageLabel.setGeometry(0, label.height(), wid, hei)
imageLabel.adjustSize()

layout.addWidget(widget)

Answer 1

顶部标签的自动换行必须正确设置，并且两个标签都必须添加到布局中。还必须在容器小部件上设置布局。不需要设置标签的几何形状，因为布局会自动完成。

更新:

有一个problem with layouts that contain labels with word-wrapping。似乎有时高度计算会出错，这意味着小部件可能会重叠。

下面是修复这些问题的演示：

import sys
from PyQt5 import QtCore, QtGui, QtWidgets

app = QtWidgets.QApplication(sys.argv)

TITLE = 'Cat for sale: Mint condition, still in original packaging'

class Widget(QtWidgets.QWidget):
    def __init__(self, parent=None):
        super().__init__(parent)
        layout = QtWidgets.QVBoxLayout(self)
        layout.setContentsMargins(10, 10, 10, 10)
        self.label = QtWidgets.QLabel(TITLE)
        self.label.setWordWrap(True)
        image = QtGui.QPixmap('cat.png')
        self.imageLabel = QtWidgets.QLabel()
        self.imageLabel.setPixmap(image)
        self.imageLabel.setFixedSize(image.size() + QtCore.QSize(0, 10))
        layout.addWidget(self.label)
        layout.addWidget(self.imageLabel)
        layout.addStretch()

    def resizeEvent(self, event):
        super().resizeEvent(event)
        height = self.label.height() + self.imageLabel.height()
        height += self.layout().spacing()
        margins = self.layout().contentsMargins()
        height += margins.top() + margins.bottom()
        if self.height() < height:
            self.setMinimumHeight(height)
        elif height < self.minimumHeight():
            self.setMinimumHeight(1)

widget= Widget()
widget.setStyleSheet('''
    background-color: purple;
    color: white;
    font-size: 26pt;
    ''')
widget.setWindowTitle('Test')
widget.setGeometry(100, 100, 500, 500)
widget.show()

app.exec_()

如何获取 QLabel 的当前高度？

How can I get the current height of a QLabel?

python

python-3.x

layout

pyqt5

qlabel