Pyqt5 synchronization between two tabwidget which are in different window - pyqt5

Question

I want to make new window by double click tabwidget.
and copy tabwidget's (child which is tablewidget) to new window.
and finally, changing item of new window's tablewidget needs to change mainwindow's tablewidget.
would it be possible?
I have seen this, that answer does copy tabwidget to new window
but remove mainwindow tabwidget.
here is I worked so far.
I managed to make new dialog by double click, but other things.. I dont' have any clues. can anyone can help?
#!/usr/bin/python
# -*- coding: utf8 -*-
from PyQt5.QtGui import *
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *
import sys
class DetachableTabWidget(QTabWidget):
def __init__(self, parent=None):
QTabWidget.__init__(self)
self.tabBar = self.TabBar(self)
self.tabBar.onDetachTabSignal.connect(self.detachTab)
self.setTabBar(self.tabBar)
print("DetachableTabWidget")
#pyqtSlot(int, QPoint)
def detachTab(self, index, point):
print("detachTab")
all_list = []
list1 = []
list2 = []
name = self.tabText(index)
icon = self.tabIcon(index)
if icon.isNull():
icon = self.window().windowIcon()
contentWidget = self.widget(index)
contentWidgetRect = contentWidget.frameGeometry()
tablewidgetA = contentWidget.findChild(QTableWidget)
for i in range(tablewidgetA.rowCount()):
list1.append(tablewidgetA.item(i, 0).text())
list2.append(tablewidgetA.item(i, 1).text())
all_list.append(list1)
all_list.append(list2)
detachedTab = self.DetachedTab(all_list)
detachedTab.setWindowModality(Qt.NonModal)
detachedTab.setWindowTitle(name)
detachedTab.setWindowIcon(icon)
detachedTab.setObjectName(name)
detachedTab.setGeometry(contentWidgetRect)
detachedTab.move(point)
detachedTab.exec_()
class DetachedTab(QDialog) :
onCloseSignal = pyqtSignal(QWidget,type(''), QIcon)
# def __init__(self, contentWidget, parent=None):
def __init__(self, all_list, parent=None) :
print("DetachedTab")
super().__init__()
layout = QVBoxLayout(self)
table = QTableWidget()
table.setColumnCount(len(all_list))
table.setRowCount(len(all_list[0]))
for col in range(len(all_list)) :
for row in range(len(all_list[col])) :
item = QTableWidgetItem(all_list[col][row])
table.setItem(row, col, item)
layout.addWidget(table)
table.show()
class TabBar(QTabBar):
onDetachTabSignal = pyqtSignal(int, QPoint)
onMoveTabSignal = pyqtSignal(int, int)
def __init__(self, parent=None):
QTabBar.__init__(self, parent)
self.setAcceptDrops(True)
self.setElideMode(Qt.ElideRight)
self.setSelectionBehaviorOnRemove(QTabBar.SelectLeftTab)
self.dragStartPos = QPoint()
self.dragDropedPos = QPoint()
self.mouseCursor = QCursor()
self.dragInitiated = False
def mouseDoubleClickEvent(self, event) :
event.accept()
self.onDetachTabSignal.emit(self.tabAt(event.pos()), self.mouseCursor.pos())
class SurfViewer(QMainWindow):
def __init__(self, parent=None):
super(SurfViewer, self).__init__()
self.parent = parent
self.centralTabs = DetachableTabWidget()
self.setCentralWidget(self.centralTabs)
self.setFixedWidth(600)
self.setFixedHeight(600)
#tab 1
self.tab_1 = QWidget()
self.centralTabs.addTab(self.tab_1,"Tab 1")
vbox = QVBoxLayout()
Table = QTableWidget(2, 2)
vbox.addWidget(Table)
item = QTableWidgetItem("table 1 content")
Table.setItem( 0, 0, item)
item = QTableWidgetItem("table 2 content")
Table.setItem( 0, 1, item)
item = QTableWidgetItem("table 3 content")
Table.setItem( 1, 0, item)
item = QTableWidgetItem("table 4 content")
Table.setItem( 1, 1, item)
vbox.setAlignment(Qt.AlignTop)
self.tab_1.setLayout(vbox)
#tab 2
self.tab_2 = QWidget()
self.centralTabs.addTab(self.tab_2,"Tab 2")
vbox = QVBoxLayout()
Table = QTableWidget(2, 2)
item = QTableWidgetItem("table 2 content")
Table.setItem( 0, 0, item)
item = QTableWidgetItem("table 3 content")
Table.setItem( 0, 1, item)
item = QTableWidgetItem("table 4 content")
Table.setItem( 1, 0, item)
item = QTableWidgetItem("table 5 content")
Table.setItem( 1, 1, item)
vbox.addWidget(Table)
vbox.setAlignment(Qt.AlignTop)
self.tab_2.setLayout(vbox)
if __name__ == '__main__':
app = QApplication(sys.argv)
ex = SurfViewer(app)
ex.setWindowTitle('window')
ex.show()
sys.exit(app.exec_( ))

Answer 1

If you want to synchronize data between item views, you have to use a common model. Since you're using a QTableWidget (which has an internal, private model, and a higher level item view) you can create a new window using a QTableView instead, and set its model to the source. In that case, you don't need to "copy" row/column/data, you only need to use the source model.
Here's a modified version of your script:
class DetachableTabWidget(QTabWidget):
# ...
#pyqtSlot(int, QPoint)
def detachTab(self, index, point):
print("detachTab")
name = self.tabText(index)
icon = self.tabIcon(index)
if icon.isNull():
icon = self.window().windowIcon()
contentWidget = self.widget(index)
contentWidgetRect = contentWidget.frameGeometry()
tablewidgetA = contentWidget.findChild(QTableWidget)
detachedTab = self.DetachedTab(tablewidgetA.model())
detachedTab.setWindowTitle(name)
detachedTab.setWindowIcon(icon)
detachedTab.setObjectName(name)
detachedTab.setGeometry(contentWidgetRect)
detachedTab.move(point)
detachedTab.exec_()
class DetachedTab(QDialog) :
onCloseSignal = pyqtSignal(QWidget,type(''), QIcon)
def __init__(self, model, parent=None) :
print("DetachedTab")
super().__init__()
layout = QVBoxLayout(self)
table = QTableView()
table.setModel(model)
layout.addWidget(table)
table.show()
With this code you can modify the "child" window table data, and it will always synchronize the source table widget.