def dataChanged(self,
topLeft: QModelIndex,
bottomRight: QModelIndex,
roles=None):
"""
Listens for dataChanged on an Intent (TreeItem)'s check state.
Renders/unrenders according to the check state.
Then, defers showing canvases to any derived views (e.g. StackedCanvasView).
"""
# We only care about the check state changing here (whether to render or unrender)
if Qt.CheckStateRole in roles or EnsembleModel.canvas_role in roles:
intent_row_start = topLeft.row()
intent_row_stop = bottomRight.row()
new_intents = set()
if topLeft.isValid() and bottomRight.isValid():
for row in range(intent_row_start, intent_row_stop + 1):
intent_index = self.model().index(row, 0)
intent = intent_index.internalPointer().data(
EnsembleModel.object_role)
try:
canvas = self._canvas_manager.canvas_from_index(
intent_index.internalPointer())
try:
canvas.sigInteractiveAction.connect(
self.sigInteractiveAction,
type=Qt.UniqueConnection)
except TypeError: # ignore errors from connection already being established
pass
except Exception as ex:
msg.logMessage(
f'A error occurred displaying the intent named {intent.name}:',
level=msg.ERROR)
msg.logError(ex)
else:
new_intents.add((canvas, intent))
removed_intents = self._last_seen_intents - new_intents
added_intents = new_intents - self._last_seen_intents
for canvas, intent in removed_intents:
if canvas is not None:
self.unrender(intent, canvas)
for canvas, intent in added_intents:
if canvas is not None:
self.render(intent, canvas)
self._last_seen_intents = new_intents
self.show_canvases()
def data(self, index: QModelIndex, role: int = ...) -> typing.Any:
if not index.isValid():
return QVariant()
elif role != Qt.DisplayRole:
return QVariant()
else:
return QVariant(self._measurementModel[index.row()]._name)
def data(self, index: QModelIndex, role: int) -> Union[str, None]:
if not index.isValid():
return None
node = index.internalPointer()
if role == Qt.DisplayRole:
return node.name
def hasChildren(self, parent: QModelIndex) -> bool:
# Reimplemented, since in the source model, the realizations have
# children (i.e. valid indices.). Realizations do not have children in
# this model.
if parent.isValid():
return False
return self.sourceModel().hasChildren(self.mapToSource(parent))
def doubleClicked_callback(self, index: QModelIndex):
import pandas as pd
import numpy as np
import numpy.ma
if index.isValid() and index.column() == NodeCols.Value:
item = index.internalPointer()
obj = item.node['obj']['fullname']
args = str(item.node['args'])
data, _ = self.shell.get_obj_value(
'analyze_getval', obj, args)
if isinstance(data, (pd.DataFrame, pd.Index, pd.Series)):
dialog = DataFrameEditor(self)
dialog.setup_and_check(data)
elif isinstance(data, (np.ndarray, np.ma.MaskedArray)):
dialog = ArrayEditor(self)
dialog.setup_and_check(data, title='', readonly=True)
elif isinstance(data, (list, set, tuple, dict)):
dialog = CollectionsEditor(self)
dialog.setup(data, title='', readonly=True)
else:
return
dialog.show()
def setData(self, index: QModelIndex, value, role=Qt.EditRole):
if not index.isValid():
return False
node = index.internalPointer()
if role == Qt.EditRole:
if isinstance(node, JsonItem):
if node.type in ('float', 'int', None):
node.value = value
try: # PyQt5
self.dataChanged.emit(index, index, [Qt.EditRole])
except TypeError: # PyQt4, PySide
self.dataChanged.emit(index, index)
elif role == Qt.CheckStateRole:
if isinstance(node, JsonItem):
if node.type == 'bool':
node.value = value == Qt.Checked
try: # PyQt5
self.dataChanged.emit(
index, index, [Qt.CheckStateRole])
except TypeError: # PyQt4, PySide
self.dataChanged.emit(index, index)
return True
return False
def flags(self, index: QModelIndex) -> Qt.ItemFlags:
"""Returns the item flags for the given `index`.
This describes the properties of a given item in the model. We set
them to be editable, checkable, dragable, droppable, etc...
If index is not a list, we additionally set `Qt.ItemNeverHasChildren`
(for optimization). Editable models must return a value containing
`Qt.ItemIsEditable`.
See Qt.ItemFlags https://doc.qt.io/qt-5/qt.html#ItemFlag-enum
"""
if (
not index.isValid()
or index.row() >= len(self._root)
or index.model() is not self
):
# we allow drops outside the items
return Qt.ItemIsDropEnabled
base_flags = (
Qt.ItemIsSelectable
| Qt.ItemIsEditable
| Qt.ItemIsUserCheckable
| Qt.ItemIsDragEnabled
| Qt.ItemIsEnabled
)
if isinstance(self.getItem(index), MutableSequence):
return base_flags | Qt.ItemIsDropEnabled
return base_flags | Qt.ItemNeverHasChildren
def mapFromSource(self, sourceIndex: QModelIndex) -> QModelIndex:
if not sourceIndex.isValid():
return QModelIndex()
if not self._index_is_on_our_branch(sourceIndex):
return QModelIndex()
source_node = sourceIndex.internalPointer()
return self.index(source_node.row(), sourceIndex.column(), QModelIndex())
def data(self, index: QModelIndex, role=Qt.DisplayRole) -> QVariant:
if not index.isValid():
return QVariant()
if role == Qt.TextAlignmentRole:
return Qt.AlignCenter
if role == ProgressRole:
return self._progress
if role in (Qt.StatusTipRole, Qt.WhatsThisRole, Qt.ToolTipRole):
return ""
if role == Qt.SizeHintRole:
return QSize(30, 30)
if role == Qt.FontRole:
return QFont()
if role in (Qt.BackgroundRole, Qt.ForegroundRole, Qt.DecorationRole):
return QColor()
if role == Qt.DisplayRole:
return ""
return QVariant()
def data(self, index: QModelIndex, role: int = ...) -> typing.Any:
if not index.isValid():
return QVariant()
elif role != Qt.DisplayRole:
return QVariant()
else:
filter_at_row = self.__filter_model[index.row()]
if index.column() == 0:
return QVariant(filter_at_row.filter_type)
elif index.column() == 1:
if hasattr(filter_at_row, 'freq'):
return QVariant(filter_at_row.freq)
else:
return QVariant('N/A')
elif index.column() == 2:
if hasattr(filter_at_row, 'q'):
return QVariant(filter_at_row.q)
else:
return QVariant('N/A')
elif index.column() == 3:
if hasattr(filter_at_row, 'q_to_s'):
return QVariant(round(filter_at_row.q_to_s(), 3))
else:
return QVariant('N/A')
elif index.column() == 4:
if hasattr(filter_at_row, 'gain'):
return QVariant(filter_at_row.gain)
else:
return QVariant('N/A')
elif index.column() == 5:
return QVariant(len(filter_at_row))
else:
return QVariant()
def data(self, index: QModelIndex, role: Qt.ItemDataRole):
"""Return data stored under ``role`` for the item at ``index``."""
if not index.isValid():
return None
layer = self.getItem(index)
if role == Qt.DisplayRole: # used for item text
return layer.name
if role == Qt.TextAlignmentRole: # alignment of the text
return Qt.AlignCenter
if role == Qt.EditRole: # used to populate line edit when editing
return layer.name
if role == Qt.ToolTipRole: # for tooltip
return layer.name
if role == Qt.CheckStateRole: # the "checked" state of this item
return Qt.Checked if layer.visible else Qt.Unchecked
if role == Qt.SizeHintRole: # determines size of item
return QSize(200, 34)
if role == ThumbnailRole: # return the thumbnail
thumbnail = layer.thumbnail
return QImage(
thumbnail,
thumbnail.shape[1],
thumbnail.shape[0],
QImage.Format_RGBA8888,
)
# normally you'd put the icon in DecorationRole, but we do that in the
# # LayerDelegate which is aware of the theme.
# if role == Qt.DecorationRole: # icon to show
# pass
return super().data(index, role)
def paint(self, painter: QPainter, option: QStyleOptionViewItem, index: QModelIndex):
"""Renders the delegate using the given painter and style option for the item specified by index.
:param painter: A QPainter object to draw
:param option: Options to describe what should be drawn
:param index: _description_
"""
if not index.isValid():
return
# Initialize the style options. This is not very Pythonic as it uses C++
# references under the hood so opt is affected by the second call
opt = QStyleOptionViewItem(option)
self.initStyleOption(opt, index)
# Standard setup, paint, restore operation
painter.save()
try:
painter.setClipRect(opt.rect)
foreground_colour, background_colour = index.data(Qt.ForegroundRole), index.data(Qt.BackgroundRole)
if foreground_colour is not None:
painter.setPen(foreground_colour)
if background_colour is not None:
painter.fillRect(option.rect, background_colour)
padding = self._padding
opt.rect = option.rect.adjusted(padding, padding, -padding, -padding)
painter.drawText(opt.rect, int(Qt.AlignLeft | Qt.AlignVCenter),
opt.fontMetrics.elidedText(opt.text, Qt.ElideRight, opt.rect.width()))
finally:
painter.restore()
def canvas_from_index(self, index: QModelIndex):
if not index.isValid():
return None
if index.data(
EnsembleModel.data_type_role) != WorkspaceDataType.Intent:
print(f'WARNING: canvas_from_index index {index} is not an intent')
return None
# Canvas exists for index, return
# TODO: in tab view, with multiple intents selected (e.g. 2 rows checked),
# non-0 row intents (every intent except first) does not have a valid object in canvas_role
canvas = index.model().data(index, EnsembleModel.canvas_role)
if canvas:
return canvas
# There is another canvas we know about we should use
for match_index in self.all_intent_indexes(index.model()):
if self.is_matching_canvas_type(index, match_index):
canvas = match_index.model().data(match_index,
EnsembleModel.canvas_role)
if canvas is not None:
index.model().setData(index, canvas,
EnsembleModel.canvas_role)
return canvas
# Does not exist, create new canvas and return
intent = index.model().data(index, EnsembleModel.object_role)
canvas_class_name = intent.canvas
registry = pluginmanager
canvas = self.canvas_from_registry(canvas_class_name, registry,
intent.canvas_name)
index.model().setData(index, canvas, EnsembleModel.canvas_role)
return canvas
def currentChanged(self, current: QModelIndex, previous: QModelIndex) -> None:
if current.isValid():
item = current.internalPointer()
if isinstance(item, ValueItem) and item.attrs["spec"]:
self.parent().update_dataattrs(item)
else:
self.parent().update_dataattrs(None)
def setData(self,
index: QModelIndex,
value: str,
role=Qt.EditRole) -> bool:
col = index.column()
row = index.row()
if index.isValid() and role == Qt.EditRole:
# type(value) == str
data = self.col_data[col]
key = data.key
if value and not value.isspace():
try:
value = data.cls(value)
except ValueError:
return False
else:
value = data.default
if key.startswith(self.TRIGGER):
key = behead(key, self.TRIGGER)
trigger = self.triggers(row)
if value == data.default:
# Delete key if (key: value) present
trigger.pop(key, None)
else:
trigger[key] = value
else:
setattr(self.channels[row], key, value)
self.dataChanged.emit(index, index, [role])
return True
return False
def columnCount(self, index: QModelIndex) -> int:
"""Returns the number of columns in the given index."""
if index.isValid():
return index.internalPointer().columnCount()
# For an invalid index, return the number of columns defined at the root item of the tree
else:
return self.rootItem.columnCount()
def flags(self, index: QModelIndex) -> int:
if not index.isValid():
return Qt.NoItemFlags
flags = super(ChannelTableModel, self).flags(index)
if index.column() == self.CHECK_COLUMN:
flags |= Qt.ItemIsUserCheckable
return flags
def flags(self, index: QModelIndex):
if not index.isValid():
return None
if index.column() == 0:
flags = Qt.ItemIsEnabled
else:
flags = super(DerivedDataModel, self).flags(index)
return flags
def _source_rows_about_to_be_inserted(
self, parent: QModelIndex, start: int, end: int
):
if not parent.isValid():
return
if not self._index_is_on_our_branch(parent):
return
self.beginInsertRows(self.mapFromSource(parent), start, end)
def flags(self, index: QModelIndex) -> Qt.ItemFlag:
"""Re-implement to additionally ensure that this model is checkable."""
if not index.isValid():
return Qt.NoItemFlags
return super(
TreeModel,
self).flags(index) | Qt.ItemIsUserCheckable #|Qt.ItemIsEditable
def flags(self, index: QModelIndex) -> int:
if not index.isValid():
return Qt.NoItemFlags
flags = super(IMCFileTreeModel, self).flags(index)
item: IMCFileTreeItem = index.internalPointer()
if index.column(
) == self.CHECK_COLUMN and item.imc_file_tree_is_checkable:
flags |= Qt.ItemIsUserCheckable
return flags
def parent(self, index: QModelIndex = None, **kwargs) -> QModelIndex:
if index is not None and index.isValid():
parent_item: IMCFileTreeItem = index.internalPointer(
).imc_file_tree_parent
if parent_item is not None and parent_item.imc_file_tree_parent is not None:
parent_row = parent_item.imc_file_tree_parent.imc_file_tree_children.index(
parent_item)
return self.createIndex(parent_row, 0, parent_item)
return QModelIndex()
def mapToSource(self, proxyIndex: QModelIndex) -> QModelIndex:
if not proxyIndex.isValid():
return QModelIndex()
sm = self.sourceModel()
iter_index = sm.index(self._iter, 0, QModelIndex())
if not iter_index.isValid() or not sm.hasChildren(iter_index):
return QModelIndex()
real_index = sm.index(proxyIndex.row(), proxyIndex.column(), iter_index)
return real_index
def _redecorate_root(self, parent: QModelIndex = None, *_):
"""Add a branch/arrow column only if there are Groups in the root.
This makes the tree fall back to looking like a simple list if there
are no lists in the root level.
"""
if not parent or not parent.isValid():
hasgroup = any(isinstance(i, MutableSequence) for i in self._root)
self.setRootIsDecorated(hasgroup)
def data(self, index: QModelIndex, role: Optional[int] = None) -> Any:
if index.isValid():
channel = self._controller.channels[index.row()]
if index.column(
) == self.CHECK_COLUMN and role == Qt.CheckStateRole:
return Qt.Checked if channel.is_shown else Qt.Unchecked
if index.column() == self.LABEL_COLUMN and role == Qt.DisplayRole:
return channel.label
return None
def getItem(self, index: QModelIndex) -> Node:
"""Return ``Node`` object for a given `QModelIndex`.
A null or invalid ``QModelIndex`` will return the root Node.
"""
if index.isValid():
item = index.internalPointer()
if item is not None:
return item
return self._root
def _index_is_on_our_branch(self, index: QModelIndex) -> bool:
# the tree is only traversed towards the root
if index.internalPointer().type not in (NodeType.ITER, NodeType.REAL):
return False
while index.isValid() and index.internalPointer() is not None:
node = index.internalPointer()
if node.type == NodeType.ITER and node.row() != self._iter:
return False
index = index.parent()
return True
def data(self, index: QModelIndex, role=Qt.DisplayRole) -> QVariant:
if not index.isValid():
return QVariant()
if role == Qt.TextAlignmentRole:
return Qt.AlignCenter
if role == ProgressRole:
return self._progress
return QVariant()
def getItem(self, index: QModelIndex) -> TreeItem:
"""Convenience method to get a TreeItem from a given index.
Returns the root item if the index passed is not valid."""
if index.isValid():
item = index.internalPointer()
if item:
return item
return self.rootItem
def on_new_iteration(self, parent: QModelIndex, start: int, end: int) -> None:
if not parent.isValid():
iter = start
self._iteration_progress_label.setText(f"Progress for iteration {iter}")
widget = RealizationWidget(iter)
widget.setSnapshotModel(self._snapshot_model)
widget.currentChanged.connect(self._select_real)
self._tab_widget.addTab(widget, f"Realizations for iteration {iter}")
def getItem(self, index: QModelIndex) -> NodeType:
"""Return python object for a given `QModelIndex`.
An invalid `QModelIndex` will return the root object.
"""
if index.isValid():
item = index.internalPointer()
if item is not None:
return item
return self._root
def flags(self, index: QModelIndex):
flags = (Qt.NoItemFlags | Qt.ItemIsDragEnabled | Qt.ItemIsSelectable |
Qt.ItemIsEnabled)
if index.isValid():
node = self.node_from_index(index)
column = self.columns[index.column()].name
if isinstance(node, JsonItem):
if column == 'value' and not node.readonly:
if not node.type == 'bool':
flags |= Qt.ItemIsEditable
else:
flags |= Qt.ItemIsUserCheckable
return flags
