Setup description
- Table in PySide created with
QMainWindow - > QWidget -> QTableView -> TableModel (QAbstractTableModel) -> array[] - For second and third column is created ButtonDelegate(QStyledItemDelegate)
- buttons toggle value in the first column - but butons must be separate for specific reason in my application (toggling with one button is not a solution)
- button with value of the first column is "hidden"
- only whole single row is selected (important in my application where I'm separately showing detailed data on the selected row)
Detailed description of functionality
- Buttons in my application don't necesserily toggle value. Easiest to explaining fonctionality of my application is something like configuration list.
- Initially in the list are generic items which can be selected and the two buttons are "+" (add/select) and "-" (remove/deselect).
- Some items can be added only once, in that case the buttons are really only toggling the item selection. If not selected only the button "+" is show and if selected only button "-" is shown.
- Some items can be added multiple times. In that case initially the item is unseleted. Presing "+" selects the item, shows "-" buton, but button "+" is still shown, as the item can be added multiple times. When pressed "+" once again, the next row with the same item is added, again with both "+" and "-" shown. Then pressing "-" works in reverse way, removing row where "-" is pressed until last item of the same type, where "-" results in unselected item. Therefore function of +/- is content dependent.
- There few reasons I decided to have buttons in separate columns - keep possibility to sort based on selection state, header to show "Add" for "+" and "Remove" for "-"
Problem description
- when button in last column is disabled (pushing False button and then True button), the selection moves to next row - should remain in the same
- also, probably the showing and hiding of active button should be done in paint (instead of the openPersistentEditor). I was looking in the documentation and examples from google to find way how to, but still I haven't figured it out. If you could show me how, I would appreciate it. Also if you have link to some good tutorial on this topic (paint) I would be glad, because still I'm not getting how to use it.
Minimal functioning example:
from PySide6.QtWidgets import QApplication, QMainWindow, QVBoxLayout, QAbstractItemView
from PySide6.QtWidgets import QTableView, QWidget, QStyledItemDelegate, QPushButton
from PySide6.QtCore import Qt, QModelIndex, QAbstractTableModel, QItemSelectionModel
class TrueButtonDelegate(QStyledItemDelegate):
def __init__(self, parent):
QStyledItemDelegate.__init__(self, parent)
def paint(self, painter, option, index):
self.parent().openPersistentEditor(index) # this should be somewhere else, not in paint
def createEditor(self, parent, option, index):
editor = QPushButton('True', parent)
editor.setEnabled(False)
editor.clicked.connect(self.buttonClicked)
return editor
def setEditorData(self, editor, index):
if not index.data():
editor.setText('True')
editor.setEnabled(True)
editor.setFlat(False)
else:
editor.setText('')
editor.setEnabled(False)
editor.setFlat(True)
def setModelData(self, editor, model, index):
model.setData(index, True, role=Qt.EditRole)
def buttonClicked(self):
self.commitData.emit(self.sender())
def eventFilter(self, obj, event):
if event.type() == event.Type.Wheel:
event.setAccepted(False)
return True
return super().eventFilter(obj, event)
class FalseButtonDelegate(QStyledItemDelegate):
def __init__(self, parent):
QStyledItemDelegate.__init__(self, parent)
def paint(self, painter, option, index):
self.parent().openPersistentEditor(index) # this should be somewhere else, not in paint
def createEditor(self, parent, option, index):
editor = QPushButton('False', parent)
editor.setEnabled(True)
editor.clicked.connect(self.buttonClicked)
return editor
def setEditorData(self, editor, index):
if index.data():
editor.setText('False')
editor.setEnabled(True)
editor.setFlat(False)
else:
editor.setText('')
editor.setEnabled(False)
editor.setFlat(True)
def setModelData(self, editor, model, index):
model.setData(index, False, role=Qt.EditRole)
def buttonClicked(self):
self.commitData.emit(self.sender())
def eventFilter(self, obj, event):
if event.type() == event.Type.Wheel:
event.setAccepted(False)
return True
return super().eventFilter(obj, event)
class TableModel(QAbstractTableModel):
def __init__(self, localData=[[]], parent=None):
super().__init__(parent)
self.modelData = localData
def headerData(self, section: int, orientation: Qt.Orientation, role: int):
if role == Qt.DisplayRole:
if orientation == Qt.Vertical:
return "Row " + str(section)
def columnCount(self, parent=None):
return 3
def rowCount(self, parent=None):
return len(self.modelData)
def data(self, index: QModelIndex, role: int):
if role == Qt.DisplayRole:
row = index.row()
return self.modelData[row]
def setData(self, index, value = None, role=Qt.DisplayRole):
row = index.row()
self.modelData[row] = value
index = self.index(row, 0)
self.dataChanged.emit(index, index)
index = self.index(row, 1)
self.dataChanged.emit(index, index)
index = self.index(row, 2)
self.dataChanged.emit(index, index)
return True
app = QApplication()
data = [True, True, True, True, True, True, True, True, True, True, True, True, True, True]
model = TableModel(data)
tableView = QTableView()
tableView.setModel(model)
selectionModel = QItemSelectionModel(model)
tableView.setSelectionModel(selectionModel)
tableView.setItemDelegateForColumn(1, FalseButtonDelegate(tableView))
tableView.setItemDelegateForColumn(2, TrueButtonDelegate(tableView))
tableView.setSelectionBehavior(QAbstractItemView.SelectRows)
tableView.setSelectionMode(QAbstractItemView.SingleSelection)
widget = QWidget()
widget.horizontalHeader = tableView.horizontalHeader()
widget.horizontalHeader.setStretchLastSection(True)
widget.mainLayout = QVBoxLayout()
widget.mainLayout.setContentsMargins(1,1,1,1)
widget.mainLayout.addWidget(tableView)
widget.setLayout(widget.mainLayout)
mainWindow = QMainWindow()
mainWindow.setCentralWidget(widget)
mainWindow.setGeometry(0, 0, 380, 300)
mainWindow.show()
exit(app.exec())
