我正在尝试使用PyQt连接到QTreeView的selectionChanged信号。 我以前曾经这样做过(对于QTableView),并且取得了成功。 但是现在我无法使类似的代码工作。
在以下代码示例中,我成功地连接到了展开和折叠信号,但无法连接到selectionChanged或activated信号。 有人能告诉我我做错了什么吗? 谢谢。
from PyQt4 import QtGui
from PyQt4 import QtCore
################################################################################
class ShaderDefTreeView(QtGui.QTreeView):
"""
Overrides the QTreeView to handle keypress events.
"""
#---------------------------------------------------------------------------
def __init__(self, parent=None):
"""
Constructor for the ShaderDefTreeView class.
"""
super(ShaderDefTreeView, self).__init__(parent)
#listen to the selectionChanged signal
print "Connecting"
#whenever the selection changes, let the data model know
self.connect(self,
QtCore.SIGNAL("selectionChanged(QItemSelection&, QItemSelection&)"),
self.store_current_selection)
self.connect(self, QtCore.SIGNAL("activated(const QModelIndex &)"),
self.activated)
self.connect(self, QtCore.SIGNAL("collapsed(const QModelIndex &)"),
self.collapsed)
self.connect(self, QtCore.SIGNAL("expanded(const QModelIndex &)"),
self.expanded)
#---------------------------------------------------------------------------
def store_current_selection(self, newSelection, oldSelection):
print "changed"
#self.model().selection_changed(newSelection)
#---------------------------------------------------------------------------
def expanded(self, newSelection):
print "expanded"
#---------------------------------------------------------------------------
def collapsed(self, newSelection):
print "collapsed"
#---------------------------------------------------------------------------
def activated(self, newSelection):
print "activated"