使用QAbstractTableModel在pyqts QTableView中插入和删除行
使用QAbstractTableModel在pyqts QTableView中插入和删除行
提问于 2020-12-16 17:54:09
如何使用QAbstractTableModel在QTableView中插入和删除单行。
将在通过will信号连接到QAbstractTableModel的单独线程中给出新行。我们的目标是在每次给出一个新的emit时添加一行。如果表命中的最大行数为10行，则应添加新发出的行，并删除第一行。因此，我有一个最大长度为10个条目的运行表。
目前，除了删除和添加行之外，一切都可以正常工作
import sys
import time
from PyQt5.QtWidgets import QApplication, QMainWindow, QToolBar, QAction, QTableView
from PyQt5.QtCore import QSize, Qt,QAbstractTableModel, pyqtSlot, pyqtSignal, QThread
import sys
import time
from PyQt5.QtWidgets import QApplication, QMainWindow, QToolBar, QAction, QTableView
from PyQt5.QtCore import QSize, Qt,QAbstractTableModel, pyqtSlot, pyqtSignal, QThread
class Table(QMainWindow):
def __init__(self):
QMainWindow.__init__(self)
self.resize(800, 600)
self.setMinimumSize(QSize(800, 600))
self.table = QTableView()
self.setCentralWidget(self.table)
toolbar = QToolBar("Toolbar")
con = QAction("Connect", self)
con.triggered.connect(self.updateTable)
discon = QAction("Disconnect", self)
discon.triggered.connect(self.terminateThread)
toolbar.addAction(con)
toolbar.addAction(discon)
self.addToolBar(toolbar)
def updateTable(self):
print("Connect")
data = [
["This", "is", "test", 1],
["This", "is", "test", 2],
["This", "is", "test", 3],
]
self.model = TableModel(data)
self.table.setModel(self.model)
self.thread = QTableThread()
self.thread.sig1.connect(self.model.addRow)
self.thread.start()
def terminateThread(self):
self.thread1.terminate()
class QTableThread(QThread):
sig1 = pyqtSignal(list)
def __init__(self):
super(QTableThread, self).__init__()
self.count = 4
def run(self):
for i in range(20):
self.sig1.emit(["This", "is", "test", self.count])
self.count += 1
time.sleep(0.5)
class TableModel(QAbstractTableModel):
def __init__(self, data):
super(TableModel, self).__init__()
self._data = data
def data(self, index, role):
if role == Qt.DisplayRole:
return self._data[index.row()][index.column()]
def rowCount(self, index):
return len(self._data)
def columnCount(self, index):
return len(self._data[0])
@pyqtSlot(list)
def addRow(self,status):
print(status)
# What to implement here?
if __name__ == "__main__":
app = QApplication(sys.argv)
win = Table()
win.show()
sys.exit( app.exec_() )Stack Overflow用户
回答已采纳
发布于 2020-12-17 02:35:43
我为您标记了我所做的更改的行。试试看：
import sys
#import time
from PyQt5.QtWidgets import QApplication, QMainWindow, QToolBar, QAction, QTableView
from PyQt5.QtCore import (QSize, Qt, QAbstractTableModel, pyqtSlot, pyqtSignal,
QThread, QModelIndex)
class QTableThread(QThread):
sig1 = pyqtSignal(list)
def __init__(self):
super(QTableThread, self).__init__()
self.count = 4
def run(self):
for i in range(20):
self.sig1.emit(["This", "is", "test", self.count])
self.count += 1
self.msleep(500) # !!!
class TableModel(QAbstractTableModel):
def __init__(self, _data):
super(TableModel, self).__init__()
self._data = _data
def data(self, index, role):
if role == Qt.DisplayRole:
return self._data[index.row()][index.column()]
def rowCount(self, index=QModelIndex()): # +
return 0 if index.isValid() else len(self._data) # +
def columnCount(self, index=QModelIndex()):
return len(self._data[0])
# +++ vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
def insertRows(self, new_row, position, rows, parent=QModelIndex()):
position = (position + self.rowCount()) if position < 0 else position
start = position
end = position + rows - 1
if end <= 8:
self.beginInsertRows(parent, start, end)
self._data.append(new_row)
self.endInsertRows()
return True
else:
self.beginInsertRows(parent, start, end)
self._data.append(new_row)
self.endInsertRows()
self.removeRows(0, 0)
return True
def removeRows(self, position, rows, parent=QModelIndex()):
start, end = position, rows
self.beginRemoveRows(parent, start, end)
del self._data[start:end + 1]
self.endRemoveRows()
return True
# +++ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
class Table(QMainWindow):
def __init__(self):
QMainWindow.__init__(self)
self.resize(800, 600)
self.setMinimumSize(QSize(800, 600))
self.table = QTableView()
self.setCentralWidget(self.table)
toolbar = QToolBar("Toolbar")
con = QAction("Connect", self)
con.triggered.connect(self.updateTable)
discon = QAction("Disconnect", self)
discon.triggered.connect(self.terminateThread)
toolbar.addAction(con)
toolbar.addAction(discon)
self.addToolBar(toolbar)
self.thread = None # +++
def updateTable(self):
print("Connect")
data = [
["This", "is", "test", 1],
["This", "is", "test", 2],
["This", "is", "test", 3],
]
self.model = TableModel(data)
self.table.setModel(self.model)
self.thread = QTableThread()
# self.thread.sig1.connect(self.model.addRow) # ---
self.thread.sig1.connect(lambda new_row: self.model.insertRows(new_row, -1, 1)) # +++
self.thread.start()
def terminateThread(self):
if self.thread and self.thread.isRunning(): # +++
self.thread.terminate()
if __name__ == "__main__":
app = QApplication(sys.argv)
win = Table()
win.show()
sys.exit( app.exec_() )
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/65320933
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