Qt 在OS-X下，QPushButton和QLineEdit的高度不同

我想将QPushButton和QLineEdit放在一个QTreeView单元格中，方法是将它们放在一个具有QHBoxLayout的容器小部件中。但是，它看起来不太好，按钮比线条编辑器高，你可以在下面我的屏幕截图中看到。当单元格只包含一个按钮或编辑器时，它将填充整个单元格，这正是我想要的

这个问题只发生在OS-X上（我使用的是10.6.8），在Windows和Linux下，它看起来和预期的一样

我已经将版面的内容边距和间距设置为0。使用样式表将小部件的填充和边距设置为0也没有帮助。我怎样才能解决这个问题

我的例子是PyQt，但我也添加了Qt和PySide标记，因为我认为这不是Python的问题

import sys
if True:
    from PyQt4 import QtCore, QtGui
    from PyQt4.QtCore import Qt
else:
    from PySide import QtCore, QtGui
    from PySide.QtCore import Qt

def setSizePolicies(widget, 
        horPolicy=QtGui.QSizePolicy.MinimumExpanding, 
        verPolicy=QtGui.QSizePolicy.MinimumExpanding):
    sizePolicy = widget.sizePolicy()
    sizePolicy.setHorizontalPolicy(horPolicy)
    sizePolicy.setVerticalPolicy(verPolicy)
    widget.setSizePolicy(sizePolicy)

def createContainer():
    container = QtGui.QFrame()

    if False: # setting this to True doesn't help
        container.setStyleSheet("""
            QWidget {
                margin: 0px;
                padding: 0px;
                border: 1px solid blue;
                border-radius: 0px;
                background-color: #CCCCCC;
            }
            QLineEdit { background-color: #FFFF00; }        
            QPushButton { background-color: #FF00FF; } 
            QPushButton:pressed { background-color: #AA00AA; }        
        """)
    hLayout = QtGui.QHBoxLayout()
    hLayout.setSpacing(0)
    hLayout.setContentsMargins(0, 0, 0, 0)
    container.setLayout(hLayout)
    return container, hLayout

class MyTableView(QtGui.QTreeView):

    def __init__(self):
        super(MyTableView, self).__init__()

        model = QtGui.QStandardItemModel(3, 2)
        self.setModel(model)
        self.header().resizeSection(0, 200)
        self.header().resizeSection(1, 300)
        self.resize(550, 400)
        self.setUniformRowHeights(True)
        self.setAlternatingRowColors(True)

        # Create a single QLineEdit inside a container widgets that has a 
        # QHBoxLayout. The edior fills the entire table cell.
        container0, hlayout0 = createContainer()
        lineEdit0 = QtGui.QLineEdit("Fills entire cell")
        setSizePolicies(lineEdit0)
        hlayout0.addWidget(lineEdit0)
        model.setData(model.index(0, 0), "Only a line editor")
        self.setIndexWidget(model.index(0, 1), container0)

        # Create a single QPushButton inside a container widgets that has a 
        # QHBoxLayout. The button fills the entire table cell.
        container1, hlayout1 = createContainer()
        button1 = QtGui.QPushButton("Fills entire cell")
        setSizePolicies(button1)
        hlayout1.addWidget(button1)
        model.setData(model.index(1, 0), "Only a push button")
        self.setIndexWidget(model.index(1, 1), container1)

        # When a button and editor are both put in a cell, the button is taller.
        # Also there is some overlap between them.
        container2, hLayout2 = createContainer()
        button2 = QtGui.QPushButton("Taller button")
        setSizePolicies(button2)
        hLayout2.addWidget(button2)
        lineEdit2 = QtGui.QLineEdit("Smaller editor")
        setSizePolicies(lineEdit2)
        hLayout2.addWidget(lineEdit2)
        model.setData(model.index(2, 0), "A button and an editor")
        self.setIndexWidget(model.index(2, 1), container2)

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

---

我找到了一个适合我的解决办法。当使用

QToolButton

而不是

QPushbutton

时，按钮的高度与行编辑器的高度相同。

这是一个Qt错误，不幸的是，我没有发现解决方法。布局中的按钮因某种原因而损坏。