def parent(model, qindex):
"""
A common convention used in models that expose tree data structures is
that only items in the first column have children. For that case, when
reimplementing this function in a subclass the column of the returned
QModelIndex would be 0.
When reimplementing this function in a subclass, be careful to avoid
calling QModelIndex member functions, such as QModelIndex.parent(),
since indexes belonging to your model will simply call your
implementation, leading to infinite recursion.
Returns:
the parent of the model item with the given index. If the item has
no parent, an invalid QModelIndex is returned.
"""
model.lazy_checks()
if qindex.isValid():
node = qindex.internalPointer()
#<HACK>
if not isinstance(node, _atn.TreeNode):
print("WARNING: tried to access parent of %r type object" % type(node))
return QtCore.QModelIndex()
#assert node.__dict__, "node.__dict__=%r" % node.__dict__
#</HACK>
parent_node = node.get_parent()
parent_id = parent_node.get_id()
if parent_id == -1 or parent_id is None:
return QtCore.QModelIndex()
row = parent_node.get_row()
col = model.col_level_list.index(parent_node.get_level())
return model.createIndex(row, col, parent_node)
return QtCore.QModelIndex()
def index(model, row, column, parent=QtCore.QModelIndex()):
"""
Qt Override
Returns:
the index of the item in the model specified by the given row,
column and parent index. When reimplementing this function in a
subclass, call createIndex() to generate model indexes that other
components can use to refer to items in your model.
NOTE:
Object must be specified to sort delegates.
"""
model.lazy_checks()
if not parent.isValid():
# This is a top level == 0 index
#print('[model.index] ROOT: row=%r, col=%r' % (row, column))
if row >= model.root_node.get_num_children():
return QtCore.QModelIndex()
#import traceback
#traceback.print_stack()
node = model.root_node[row]
if model.col_level_list[column] != node.get_level():
return QtCore.QModelIndex()
qtindex = model.createIndex(row, column, object=node)
return qtindex
else:
# This is a child level > 0 index
parent_node = parent.internalPointer()
node = parent_node[row]
if ut.USE_ASSERT:
assert isinstance(parent_node, _atn.TreeNode), type(parent_node)
assert isinstance(node, _atn.TreeNode), type(node)
return model.createIndex(row, column, object=node)
def source_to_proxy(self, row, col, parent=QtCore.QModelIndex()):
source_model = self.sourceModel()
source_cols = source_model.columnCount(parent=parent)
r, c, p = row, col, parent
r2 = int(math.floor(r / self._nd))
c2 = ((r % self._nd) * source_cols) + c
p2 = p
return r2, c2, p2
def proxy_to_source(self, row, col, parent=QtCore.QModelIndex()):
source_model = self.sourceModel()
source_cols = source_model.columnCount(parent=parent)
r, c, p = row, col, parent
r2 = int(math.floor(c / source_cols)) + (r * self._nd)
c2 = c % source_cols
p2 = p
return r2, c2, p2
def mapFromSource(self, sourceIndex):
""" returns index into proxy model """
if sourceIndex is None:
return None
if sourceIndex.isValid():
r2, c2, p2 = self.source_to_proxy(sourceIndex.row(),
sourceIndex.column(),
sourceIndex.parent())
proxyIndex = self.index(r2, c2, p2)
else:
proxyIndex = QtCore.QModelIndex()
return proxyIndex
def mapToSource(self, proxyIndex):
""" returns index into original model """
if proxyIndex is None:
return None
if proxyIndex.isValid():
r2, c2, p2 = self.proxy_to_source(proxyIndex.row(),
proxyIndex.column())
sourceIndex = self.sourceModel().index(
r2, c2, parent=p2) # self.sourceModel().root_node[r2]
else:
sourceIndex = QtCore.QModelIndex()
return sourceIndex
def rowCount(model, parent=QtCore.QModelIndex()):
""" Qt Override """
#model.lazy_checks()
if not parent.isValid():
# Root row count
if len(model.level_index_list) == 0:
return 0
nRows = len(model.level_index_list)
#print('* nRows=%r' % nRows)
return nRows
else:
node = parent.internalPointer()
nRows = node.get_num_children()
#print('+ nRows=%r' % nRows)
return nRows
def _get_row_id(model, qtindex=QtCore.QModelIndex()):
"""
returns the id (specified by iders i.e. an ibeis rowid) from qtindex
"""
if qtindex.isValid():
node = qtindex.internalPointer()
if ut.USE_ASSERT:
try:
assert isinstance(node, _atn.TreeNode), 'type(node)=%r, node=%r' % (type(node), node)
except AssertionError as ex:
ut.printex(ex, 'error in _get_row_id', keys=['model', 'qtindex', 'node'])
raise
try:
id_ = node.get_id()
except AttributeError as ex:
ut.printex(ex, key_list=['node', 'model', 'qtindex'])
raise
return id_
def _get_adjacent_qtindex(model, qtindex=QtCore.QModelIndex(), offset=1):
# check qtindex
if not qtindex.isValid():
return None
node = qtindex.internalPointer()
# check node
try:
if ut.USE_ASSERT:
assert isinstance(node, _atn.TreeNode), type(node)
except AssertionError as ex:
ut.printex(ex, key_list=['node'], pad_stdout=True)
raise
# get node parent
try:
node_parent = node.get_parent()
except Exception as ex:
ut.printex(ex, key_list=['node'], reraise=False, pad_stdout=True)
raise
# parent_node check
if node_parent is None:
print('[model._get_adjacent_qtindex] node_parent is None!')
return None
# Offset to find the next qtindex
next_index = node_parent.child_index(node) + offset
nChildren = node_parent.get_num_children()
# check next index validitiy
if next_index >= 0 and next_index < nChildren:
next_node = node_parent.get_child(next_index)
next_level = next_node.get_level()
col = model.col_level_list.index(next_level)
row = next_node.get_row()
# Create qtindex for the adjacent note
parent_qtindex = model.parent(qtindex)
next_qtindex = model.index(row, col, parent_qtindex)
return next_qtindex
else:
# There is no adjacent node
return None
def index(self, row, col, parent=QtCore.QModelIndex()):
if (row, col) != (-1, -1):
proxyIndex = self.createIndex(row, col, parent)
else:
proxyIndex = QtCore.QModelIndex()
return proxyIndex
def columnCount(self, parent=QtCore.QModelIndex()):
source_cols = self.sourceModel().columnCount(parent=parent)
cols = self._nd * source_cols
#print('StripeProxyModel.columnCount(): %r %r' % (source_cols, cols))
return int(cols)
def source_to_proxy(self, row, col, parent=QtCore.QModelIndex()):
r2, c2, p2 = row, col, parent
return r2, c2, p2
def index(model, row, column, parent=QtCore.QModelIndex()):
""" Qt Override """
return model.createIndex(row, column)
def columnCount(model, parent=QtCore.QModelIndex()):
""" Qt Override """
return len(model.col_name_list)
def rowCount(model, parent=QtCore.QModelIndex()):
""" Qt Override """
return len(model.row_sortx)
def columnCount(model, parent=QtCore.QModelIndex()):
""" Qt Override """
# FOR NOW THE COLUMN COUNT IS CONSTANT
model.lazy_checks()
return len(model.col_name_list)
def rowCount(self, parent=QtCore.QModelIndex()):
sourceParent = self.mapToSource(parent)
source_rows = self.sourceModel().rowCount(parent=sourceParent)
rows = math.ceil(source_rows / self._nd)
#print('StripeProxyModel.rowCount(): %r %r' % (source_rows, rows))
return int(rows)
