#pyqt5# 在 QTablewidget控件中 通过鼠标拖动实现 改变行索引 或 列索引
通过重写 QTablewidget 控件，可以实现鼠标拖动改变列索引或行索引
1.鼠标拖动列表元素改变行索引：
class TableWidget(QTableWidget):
# class Label(QWidget,QPainter):
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
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):
if event.source() == self:
rows = set([mi.row() for mi in self.selectedIndexes()])
targetRow = self.indexAt(event.pos()).row()
rows.discard(targetRow)
rows = sorted(rows)
if not rows:
return
if targetRow == -1:
targetRow = self.rowCount()
for _ in range(len(rows)):
self.insertRow(targetRow)
rowMapping = dict() # Src row to target row.
for idx, row in enumerate(rows):
if row < targetRow:
rowMapping[row] = targetRow + idx
else:
rowMapping[row + len(rows)] = targetRow + idx
colCount = self.columnCount()
for srcRow, tgtRow in sorted(rowMapping.iteritems()):
for col in range(0, colCount):
self.setItem(tgtRow, col, self.takeItem(srcRow, col))
for row in reversed(sorted(rowMapping.iterkeys())):
self.removeRow(row)
event.accept()
return
def drop_on(self, event):
index = self.indexAt(event.pos())
if not index.isValid():
return self.rowCount()
print("drop_on_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()
2. 鼠标拖动列表元素改变列索引：
class TableWidget(QTableWidget):
# class Label(QWidget,QPainter):
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
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):
print("*******")
if not event.isAccepted() and event.source() == self:
print("in*******")
drop_row = self.drop_on(event)
print(drop_row)
rows = sorted(set(item.row() for item in self.selectedItems())) #所有要移动的行
rows_to_move = [
[QTableWidgetItem(self.item(row_index, column_index)) for column_index in range(self.columnCount())]
for row_index in rows]
print(rows_to_move )
for row_index in reversed(rows):
self.removeRow(row_index)
if row_index < drop_row:
drop_row -= 1
print("row",self.rowCount())
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)
print("row",self.rowCount())
event.accept()
for row_index in range(len(rows_to_move)):
self.item(drop_row + row_index, 0).setSelected(True)
# self.item(drop_row + row_index, 1).setSelected(True)
print("row",self.rowCount())
# super().dropEvent(event)
print("row", self.rowCount())
def drop_on(self, event):
index = self.indexAt(event.pos())
if not index.isValid():
return self.rowCount()
print("drop_on_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()