问 像QTextEdit这样的QWidget会自动将其高度换行到内容中吗？

这几乎和我前几天回答的关于让QTextEdit调整高度以响应内容更改的问题一模一样： PySide Qt: Auto vertical growth for TextEdit Widget

我正在回答，而不是标记副本，因为我怀疑你可能想要这个的变体。如果你想让我扩展这个答案，请告诉我：

另一个问题有多个部分。下面是growing height小部件的摘录：

class Window(QtGui.QDialog):
    def __init__(self):
        super(Window, self).__init__()
        self.resize(600,400)
        self.mainLayout = QtGui.QVBoxLayout(self)
        self.mainLayout.setMargin(10)
        self.scroll = QtGui.QScrollArea()
        self.scroll.setWidgetResizable(True)
        self.scroll.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOn)
        self.mainLayout.addWidget(self.scroll)
        scrollContents = QtGui.QWidget()
        self.scroll.setWidget(scrollContents)
        self.textLayout = QtGui.QVBoxLayout(scrollContents)
        self.textLayout.setMargin(10)
        for _ in xrange(5):
            text = GrowingTextEdit()
            text.setMinimumHeight(50)
            self.textLayout.addWidget(text)
class GrowingTextEdit(QtGui.QTextEdit):
    def __init__(self, *args, **kwargs):
        super(GrowingTextEdit, self).__init__(*args, **kwargs)  
        self.document().contentsChanged.connect(self.sizeChange)
        self.heightMin = 0
        self.heightMax = 65000
    def sizeChange(self):
        docHeight = self.document().size().height()
        if self.heightMin <= docHeight <= self.heightMax:
            self.setMinimumHeight(docHeight)

下面的代码将QTextEdit构件设置为内容的高度：

# using QVBoxLayout in this example
grid = QVBoxLayout()
text_edit = QTextEdit('Some content. I make this a little bit longer as I want to see the effect on a widget with more than one line.')
# read-only
text_edit.setReadOnly(True)
# no scroll bars in this example
text_edit.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff) 
text_edit.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff) 
text_edit.setSizePolicy(QSizePolicy.Fixed, QSizePolicy.Fixed)
# you can set the width to a specific value
# text_edit.setFixedWidth(400)
# this is the trick, we nee to show the widget without making it visible.
# only then the document is created and the size calculated.
# Qt.WA_DontShowOnScreen = 103, PyQt does not have this mapping?!
text_edit.setAttribute(103)
text_edit.show()