def test_qabstratitemview_item_delegate_for_index(self):
view = QTableView()
model = QStringListModel()
model.setStringList(["AA", "BB"])
view.setModel(model)
idx1 = model.index(0, 0)
idx2 = model.index(1, 0)
delegate = QStyledItemDelegate()
view.setItemDelegate(delegate)
with warnings.catch_warnings(record=True):
self.assertIs(view.itemDelegate(idx1), delegate)
self.assertIs(view.itemDelegate(idx2), delegate)
def _on_distribution_color_changed(self):
for ti in range(self.tabs.count()):
widget = self.tabs.widget(ti)
model = widget.model()
while isinstance(model, QAbstractProxyModel):
model = model.sourceModel()
data = model.source
class_var = data.domain.class_var
if self.color_by_class and class_var and class_var.is_discrete:
color_schema = [QColor(*c) for c in class_var.colors]
else:
color_schema = None
if self.show_distributions:
delegate = gui.TableBarItem(self, color=self.dist_color,
color_schema=color_schema)
else:
delegate = QStyledItemDelegate(self)
widget.setItemDelegate(delegate)
tab = self.tabs.currentWidget()
if tab:
tab.reset()
def _setup_table_view(self, view, data):
"""Setup the `view` (QTableView) with `data` (Orange.data.Table)
"""
if data is None:
view.setModel(None)
return
datamodel = RichTableModel(data)
rowcount = data.approx_len()
if self.color_by_class and data.domain.has_discrete_class:
color_schema = [
QColor(*c) for c in data.domain.class_var.colors]
else:
color_schema = None
if self.show_distributions:
view.setItemDelegate(
gui.TableBarItem(
self, color=self.dist_color, color_schema=color_schema)
)
else:
view.setItemDelegate(QStyledItemDelegate(self))
# Enable/disable view sorting based on data's type
view.setSortingEnabled(is_sortable(data))
header = view.horizontalHeader()
header.setSectionsClickable(is_sortable(data))
header.setSortIndicatorShown(is_sortable(data))
view.setModel(datamodel)
vheader = view.verticalHeader()
option = view.viewOptions()
size = view.style().sizeFromContents(
QStyle.CT_ItemViewItem, option,
QSize(20, 20), view)
vheader.setDefaultSectionSize(size.height() + 2)
vheader.setMinimumSectionSize(5)
vheader.setSectionResizeMode(QHeaderView.Fixed)
# Limit the number of rows displayed in the QTableView
# (workaround for QTBUG-18490 / QTBUG-28631)
maxrows = (2 ** 31 - 1) // (vheader.defaultSectionSize() + 2)
if rowcount > maxrows:
sliceproxy = TableSliceProxy(
parent=view, rowSlice=slice(0, maxrows))
sliceproxy.setSourceModel(datamodel)
# First reset the view (without this the header view retains
# it's state - at this point invalid/broken)
view.setModel(None)
view.setModel(sliceproxy)
assert view.model().rowCount() <= maxrows
assert vheader.sectionSize(0) > 1 or datamodel.rowCount() == 0
# update the header (attribute names)
self._update_variable_labels(view)
selmodel = BlockSelectionModel(
view.model(), parent=view, selectBlocks=not self.select_rows)
view.setSelectionModel(selmodel)
view.selectionFinished.connect(self.update_selection)
