如何在 QTableWidget 中将拖放与排序结合起来? [英] How to combine drag and drop with sorting in a QTableWidget?
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问题描述
在 QTableWidget 中，我希望能够:
- 按列对表格进行排序和
- 通过拖动和更改行顺序将行放到不同的位置
经过大量过时或令人困惑的代码片段，到目前为止，对我来说，移动行的最清晰解决方案是
解决方案
您应该关闭自动排序并改用按需排序.这只会在单击标题时按列排序，并且可以通过表小部件的标题非常简单地实现:
header = self.horizontalHeader()header.setSortIndicatorShown(True)header.sortIndicatorChanged.connect(self.sortItems)唯一需要的其他更改是删除所有 setSortingEnabled 调用，并在填充表时设置初始排序.因此，您的示例将如下所示:
导入系统从 PyQt5.QtCore 导入 Qt从 PyQt5.QtWidgets 导入 QApplication、QWidget、QTableWidget、QVBoxLayout、QTableWidgetItem、QAbstractItemView从 PyQt5.QtGui 导入 QDropEvent, QDragMoveEvent从日期时间导入日期时间随机导入类 TableWidgetDragRows(QTableWidget):def __init__(self, *args, **kwargs):super().__init__(*args, **kwargs)# 设置按需排序header = self.horizontalHeader()header.setSortIndicatorShown(True)header.sortIndicatorChanged.connect(self.sortItems)self.setDragEnabled(True)self.setAcceptDrops(True)self.viewport().setAcceptDrops(True)self.setDragDropOverwriteMode(False)self.setDropIndicatorShown(True)self.setSelectionMode(QAbstractItemView.ExtendedSelection)self.setSelectionBehavior(QAbstractItemView.SelectRows)self.setDragDropMode(QAbstractItemView.InternalMove)def dropEvent(self, event: QDropEvent):如果不是 event.isAccepted() 和 event.source() == self:drop_row = self.drop_on(event)rows = sorted(set(item.row() for item in self.selectedItems()))rows_to_move = [[QTableWidgetItem(self.item(row_index, column_index)) for column_index in range(self.columnCount())]对于行中的 row_index]对于反转(行)中的 row_index:self.removeRow(row_index)如果 row_index = rect.center().y()类 MyWindow(QWidget):def __init__(self):super(MyWindow,self).__init__()self.setGeometry(100,100,600,300)self.layout = QVBoxLayout()self.setLayout(self.layout)self.tw = TableWidgetDragRows(self)self.layout.addWidget(self.tw)self.tw.setRowCount(5)self.tw.setColumnCount(3)对于范围内的行(self.tw.rowCount()):对于范围内的 col(self.tw.columnCount()):如果列==0:myValue = "".join([chr(random.randint(65,90)) for i in range(0,4)])别的:myValue = random.randint(0,100)twi = QTableWidgetItem()twi.setData(Qt.DisplayRole,myValue)self.tw.setItem(row, col, twi)# 进行初始排序self.tw.sortItems(0)自我展示()如果 __name__ == '__main__':app = QApplication(sys.argv)app.setStyle(融合")窗口 = MyWindow()sys.exit(app.exec_()) In a QTableWidget I would like to be able to:
- sort the table by columns and
- change the row order by drag & drop of rows to a different position
After a lot of outdated or confusing code snippets, so far, for me the clearest solution for moving a row I found here.
And sorting can simply be enabled/disabled by setSortingEnabled(True/False).
Draging and dropping works alone and sorting works alone, but not together.
I guess what's going on is when dropping the table will be sorted again. So, I thought if I switch off sorting during dragging it should get the desired result, but it's not the case. Apparently, I doing something wrong.
I am sure it must be a small detail, but what am I missing here? It looks like I need to get rid of the sorting arrow in the column header.
Code: (should be copy & paste & run):
import sys
from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import QApplication, QWidget, QTableWidget, QVBoxLayout, QTableWidgetItem, QAbstractItemView
from PyQt5.QtGui import QDropEvent, QDragMoveEvent
from datetime import datetime
import random
class TableWidgetDragRows(QTableWidget):
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.setSortingEnabled(True) # enable sorting by default
self.setDragEnabled(True)
self.setAcceptDrops(True)
self.viewport().setAcceptDrops(True)
self.setDragDropOverwriteMode(False)
self.setDropIndicatorShown(True)
self.setSelectionMode(QAbstractItemView.ExtendedSelection)
self.setSelectionBehavior(QAbstractItemView.SelectRows)
self.setDragDropMode(QAbstractItemView.InternalMove)
def dragEvent(self, event: QDragMoveEvent):
self.setSortingEnabled(False) # disable sorting during dragging
def dropEvent(self, event: QDropEvent):
self.setSortingEnabled(False) # disable sorting during dropping
if not event.isAccepted() and event.source() == self:
drop_row = self.drop_on(event)
rows = sorted(set(item.row() for item in self.selectedItems()))
rows_to_move = [[QTableWidgetItem(self.item(row_index, column_index)) for column_index in range(self.columnCount())]
for row_index in rows]
for row_index in reversed(rows):
self.removeRow(row_index)
if row_index < drop_row:
drop_row -= 1
for row_index, data in enumerate(rows_to_move):
row_index += drop_row
self.insertRow(row_index)
for column_index, column_data in enumerate(data):
self.setItem(row_index, column_index, column_data)
event.accept()
for row_index in range(len(rows_to_move)): # maybe can be done smarter
for col in range(self.columnCount()):
self.item(drop_row + row_index, col).setSelected(True)
super().dropEvent(event)
self.setSortingEnabled(True)
def drop_on(self, event):
index = self.indexAt(event.pos())
if not index.isValid():
return self.rowCount()
return index.row() + 1 if self.is_below(event.pos(), index) else index.row()
def is_below(self, pos, index):
rect = self.visualRect(index)
margin = 2
if pos.y() - rect.top() < margin:
return False
elif rect.bottom() - pos.y() < margin:
return True
# noinspection PyTypeChecker
return rect.contains(pos, True) and not (int(self.model().flags(index)) & Qt.ItemIsDropEnabled) and pos.y() >= rect.center().y()
class MyWindow(QWidget):
def __init__(self):
super(MyWindow,self).__init__()
self.setGeometry(100,100,600,300)
self.layout = QVBoxLayout()
self.setLayout(self.layout)
self.tw = TableWidgetDragRows(self)
self.layout.addWidget(self.tw)
self.tw.setRowCount(5)
self.tw.setColumnCount(3)
#
for row in range(self.tw.rowCount()):
for col in range(self.tw.columnCount()):
if col==0:
myValue = "".join([chr(random.randint(65,90)) for i in range(0,4)])
else:
myValue = random.randint(0,100)
twi = QTableWidgetItem()
twi.setData(Qt.DisplayRole,myValue)
self.tw.setItem(row, col, twi)
self.show()
if __name__ == '__main__':
app = QApplication(sys.argv)
app.setStyle("Fusion")
window = MyWindow()
sys.exit(app.exec_())
Result:
解决方案
You should turn off automatic sorting and use on-demand sorting instead. This will only sort by column when the header is clicked, and can be implemented quite simply via the header of the table-widget:
header = self.horizontalHeader()
header.setSortIndicatorShown(True)
header.sortIndicatorChanged.connect(self.sortItems)
The only other changes needed are to remove all setSortingEnabled calls, and to set an initial sort whenever the table is populated. So your example would then look like this:
import sys
from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import QApplication, QWidget, QTableWidget, QVBoxLayout, QTableWidgetItem, QAbstractItemView
from PyQt5.QtGui import QDropEvent, QDragMoveEvent
from datetime import datetime
import random
class TableWidgetDragRows(QTableWidget):
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
# set up on demand sorting
header = self.horizontalHeader()
header.setSortIndicatorShown(True)
header.sortIndicatorChanged.connect(self.sortItems)
self.setDragEnabled(True)
self.setAcceptDrops(True)
self.viewport().setAcceptDrops(True)
self.setDragDropOverwriteMode(False)
self.setDropIndicatorShown(True)
self.setSelectionMode(QAbstractItemView.ExtendedSelection)
self.setSelectionBehavior(QAbstractItemView.SelectRows)
self.setDragDropMode(QAbstractItemView.InternalMove)
def dropEvent(self, event: QDropEvent):
if not event.isAccepted() and event.source() == self:
drop_row = self.drop_on(event)
rows = sorted(set(item.row() for item in self.selectedItems()))
rows_to_move = [[QTableWidgetItem(self.item(row_index, column_index)) for column_index in range(self.columnCount())]
for row_index in rows]
for row_index in reversed(rows):
self.removeRow(row_index)
if row_index < drop_row:
drop_row -= 1
for row_index, data in enumerate(rows_to_move):
row_index += drop_row
self.insertRow(row_index)
for column_index, column_data in enumerate(data):
self.setItem(row_index, column_index, column_data)
event.accept()
for row_index in range(len(rows_to_move)): # maybe can be done smarter
for col in range(self.columnCount()):
self.item(drop_row + row_index, col).setSelected(True)
super().dropEvent(event)
def drop_on(self, event):
index = self.indexAt(event.pos())
if not index.isValid():
return self.rowCount()
return index.row() + 1 if self.is_below(event.pos(), index) else index.row()
def is_below(self, pos, index):
rect = self.visualRect(index)
margin = 2
if pos.y() - rect.top() < margin:
return False
elif rect.bottom() - pos.y() < margin:
return True
# noinspection PyTypeChecker
return rect.contains(pos, True) and not (int(self.model().flags(index)) & Qt.ItemIsDropEnabled) and pos.y() >= rect.center().y()
class MyWindow(QWidget):
def __init__(self):
super(MyWindow,self).__init__()
self.setGeometry(100,100,600,300)
self.layout = QVBoxLayout()
self.setLayout(self.layout)
self.tw = TableWidgetDragRows(self)
self.layout.addWidget(self.tw)
self.tw.setRowCount(5)
self.tw.setColumnCount(3)
for row in range(self.tw.rowCount()):
for col in range(self.tw.columnCount()):
if col==0:
myValue = "".join([chr(random.randint(65,90)) for i in range(0,4)])
else:
myValue = random.randint(0,100)
twi = QTableWidgetItem()
twi.setData(Qt.DisplayRole,myValue)
self.tw.setItem(row, col, twi)
# do initial sort
self.tw.sortItems(0)
self.show()
if __name__ == '__main__':
app = QApplication(sys.argv)
app.setStyle("Fusion")
window = MyWindow()
sys.exit(app.exec_())
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