我希望对 PyQT5 中的 QTableView 进行排序。我找到了一个使用 PyQT4 的示例,但在 PyQT5 中 SIGNALs 已经不再存在。以下是我的示例代码:
class MainWindow(QWidget):
def __init__(self, parent=None):
super(MainWindow, self).__init__(parent)
# create table
self.get_table_data()
table = self.createTable()
# layout
layout = QVBoxLayout()
layout.addWidget(table)
self.setLayout(layout)
def get_table_data(self):
stdouterr = os.popen("dir c:\\").read()
lines = stdouterr.splitlines()
lines = lines[5:]
lines = lines[:-2]
self.tabledata = [re.split(r"\s+", line, 4)
for line in lines]
def createTable(self):
# create the view
tv = QTableView()
# set the table model
header = ['date', 'time', '', 'size', 'filename']
tm = MyTableModel(self.tabledata, header, self)
tv.setModel(tm)
# set the minimum size
tv.setMinimumSize(400, 300)
# hide grid
tv.setShowGrid(False)
tv.setSelectionBehavior(QAbstractItemView.SelectRows)
# set the font
# hide vertical header
vh = tv.verticalHeader()
vh.setVisible(False)
# set horizontal header properties
hh = tv.horizontalHeader()
hh.setStretchLastSection(True)
# set column width to fit contents
tv.resizeColumnsToContents()
# set row height
nrows = len(self.tabledata)
for row in range(nrows):
tv.setRowHeight(row, 18)
# enable sorting
tv.setSortingEnabled(True)
return tv
self.setWindowTitle("Finance")
class MyTableModel(QAbstractTableModel):
def __init__(self, datain, headerdata, parent=None, *args):
""" datain: a list of lists
headerdata: a list of strings
"""
QAbstractTableModel.__init__(self, parent, *args)
self.arraydata = datain
self.headerdata = headerdata
def rowCount(self, parent):
return len(self.arraydata)
def columnCount(self, parent):
return len(self.arraydata[0])
def data(self, index, role):
if not index.isValid():
return QVariant()
elif role != Qt.DisplayRole:
return QVariant()
return QVariant(self.arraydata[index.row()][index.column()])
def headerData(self, col, orientation, role):
if orientation == Qt.Horizontal and role == Qt.DisplayRole:
return QVariant(self.headerdata[col])
return QVariant()
def sort(self, Ncol, order):
"""Sort table by given column number.
"""
self.emit(SIGNAL("layoutAboutToBeChanged()"))
self.arraydata = sorted(self.arraydata, key=operator.itemgetter(Ncol))
if order == Qt.DescendingOrder:
self.arraydata.reverse()
self.emit(SIGNAL("layoutChanged()"))
if __name__ == '__main__':
from PyQt5.QtWidgets import QApplication
app = QApplication(sys.argv)
helloPythonWidget = MainWindow()
helloPythonWidget.show()
sys.exit(app.exec_())
我尝试了许多不同的方法来使用 self.layoutAboutToBeChanged() 和 pyqtSignal,但是老实说,我不理解它,因为我对 Python 和 PyQT 还很陌生。我尝试从文档中获取信息,但是文档并没有给我提供明确的线索,而且我也没有在网上找到一个好的示例。
更新:
我解决了这个难题:self.layoutAboutToBeChanged.emit() 发出了信号(eclipse 中的代码提示有误导性)。
def sort(self, Ncol, order):
"""Sort table by given column number.
"""
self.layoutAboutToBeChanged.emit()
self.arraydata = sorted(self.arraydata, key=operator.itemgetter(Ncol))
if order == Qt.DescendingOrder:
self.arraydata.reverse()
self.layoutChanged.emit()
这是解决方案。
from PyQt5.QtCore import pyqtSignal
是等价的吗? - Padraic CunninghamPyQt5
中使用“新式”信号和槽,例如:http://pyqt.sourceforge.net/Docs/PyQt4/new_style_signals_slots.html。 - sebastian