我正在尝试在表格中显示一个组合框,以便我可以像表格中的其他单元格一样从表格模型中设置选定的索引。我从其他示例中拼凑了这个示例,但仍然无法理解如何交互来设置QComboBox的选定索引。
这是我能想到的最简单的示例来演示问题。如果有人能演示如何从模型数据自动设置索引?还有如何使用'currentIndexChanged'信号,因为每次重新绘制时似乎都会触发它?谢谢。
这是我能想到的最简单的示例来演示问题。如果有人能演示如何从模型数据自动设置索引?还有如何使用'currentIndexChanged'信号,因为每次重新绘制时似乎都会触发它?谢谢。
# The following tells SIP (the system that binds Qt's C++ to Python)
# to return Python native types rather than QString and QVariant
import sip
sip.setapi('QString', 2)
sip.setapi('QVariant', 2)
from PyQt4 import QtCore, QtGui
class TableModel(QtCore.QAbstractTableModel):
"""
A simple 5x4 table model to demonstrate the delegates
"""
def rowCount(self, parent=QtCore.QModelIndex()): return 5
def columnCount(self, parent=QtCore.QModelIndex()): return 4
def data(self, index, role=QtCore.Qt.DisplayRole):
if not index.isValid(): return None
if not role==QtCore.Qt.DisplayRole: return None
return "{0:02d}".format(index.row())
class ComboDelegate(QtGui.QItemDelegate):
"""
A delegate that places a fully functioning QComboBox in every
cell of the column to which it's applied
"""
def __init__(self, parent):
QtGui.QItemDelegate.__init__(self, parent)
def paint(self, painter, option, index):
self.combo = QtGui.QComboBox(self.parent())
self.connect(self.combo, QtCore.SIGNAL("currentIndexChanged(int)"), self.parent().currentIndexChanged)
li = []
li.append("Zero")
li.append("One")
li.append("Two")
li.append("Three")
li.append("Four")
li.append("Five")
self.combo.addItems(li)
if not self.parent().indexWidget(index):
self.parent().setIndexWidget(
index,
self.combo
)
class TableView(QtGui.QTableView):
"""
A simple table to demonstrate the QComboBox delegate.
"""
def __init__(self, *args, **kwargs):
QtGui.QTableView.__init__(self, *args, **kwargs)
# Set the delegate for column 0 of our table
# self.setItemDelegateForColumn(0, ButtonDelegate(self))
self.setItemDelegateForColumn(0, ComboDelegate(self))
@QtCore.pyqtSlot()
def currentIndexChanged(self, ind):
print "Combo Index changed {0} {1} : {2}".format(ind, self.sender().currentIndex(), self.sender().currentText())
if __name__=="__main__":
from sys import argv, exit
class Widget(QtGui.QWidget):
"""
A simple test widget to contain and own the model and table.
"""
def __init__(self, parent=None):
QtGui.QWidget.__init__(self, parent)
l=QtGui.QVBoxLayout(self)
self._tm=TableModel(self)
self._tv=TableView(self)
self._tv.setModel(self._tm)
l.addWidget(self._tv)
a=QtGui.QApplication(argv)
w=Widget()
w.show()
w.raise_()
exit(a.exec_())
openPersistentEditor()
,可以在委托的paint()
函数中调用它,而不是循环调用。 - Alexandros Gouvatsos