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| class CBDelegate(QtGui.QStyledItemDelegate):
"""
A delegate that places a fully functioning QCheckBox in every
cell of the column to which it's applied
"""
def __init__(self, parent):
QtGui.QItemDelegate.__init__(self, parent)
self.parent = parent
def createEditor(self, parent, option, index):
'''
Important, otherwise an editor is created if the user clicks in this
cell.
** Need to hook up a signal to the model
'''
return None
def paint(self, painter, option, index):
'''
Paint a checkbox without the label.
'''
#painter.setPen(QtCore.Qt.darkGreen)
print painter.isActive()
checked = index.data().toBool()
check_box_style_option = QtGui.QStyleOptionButton()
if (index.flags() & QtCore.Qt.ItemIsEditable) > 0:
check_box_style_option.state |= QtGui.QStyle.State_Enabled
print 1
else:
check_box_style_option.state |= QtGui.QStyle.State_ReadOnly
print 2
if checked:
check_box_style_option.state |= QtGui.QStyle.State_On
print 3
else:
check_box_style_option.state |= QtGui.QStyle.State_Off
print 4
check_box_style_option.rect = self.getCheckBoxRect(option)
check_box_style_option.state |= QtGui.QStyle.State_Enabled
QtGui.QApplication.style().drawControl(
QtGui.QStyle.CE_CheckBox, check_box_style_option, painter)
def editorEvent(self, event, model, option, index):
'''
Change the data in the model and the state of the checkbox
if the user presses the left mousebutton or presses
Key_Space or Key_Select and this cell is editable. Otherwise do nothing
'''
# If event type is : Mouse move => Pass
if event.type() == 5:
return False
if not (index.flags() & QtCore.Qt.ItemIsEditable) > 0:
return False
# Do not change the checkbox-state
if event.type() == QtCore.QEvent.MouseButtonPress:
return False
if event.type() == QtCore.QEvent.MouseButtonRelease or \
event.type() == QtCore.QEvent.MouseButtonDblClick:
if event.button() != QtCore.Qt.LeftButton or not \
self.getCheckBoxRect(option).contains(event.pos()):
return False
if event.type() == QtCore.QEvent.MouseButtonDblClick:
return True
elif event.type() == QtCore.QEvent.KeyPress:
if event.key() != QtCore.Qt.Key_Space and\
event.key() != QtCore.Qt.Key_Select:
return False
else:
return False
# Change the checkbox-state
self.setModelData(None, model, index)
return True
def setModelData(self, editor, model, index):
'''
The user wanted to change the old state in the opposite.
'''
# Update model therefore the view delegate
newValue = not index.data().toBool()
model.setData(index, format(newValue), QtCore.Qt.EditRole)
model.submit()
# Save data in SQL Table
QTableRow = index.row()
QTableCol = index.column()
self.parent.editDataItem(
QTableRow, QTableCol, newValue, refreshTable=False)
def getCheckBoxRect(self, option):
check_box_style_option = QtGui.QStyleOptionButton()
check_box_rect = QtGui.QApplication.style().subElementRect(
QtGui.QStyle.SE_CheckBoxIndicator, check_box_style_option, None)
check_box_point = QtCore.QPoint(
option.rect.x() +
option.rect.width() / 2 -
check_box_rect.width() / 2,
option.rect.y() +
option.rect.height() / 2 -
check_box_rect.height() / 2)
return QtCore.QRect(check_box_point, check_box_rect.size()) |
