def dragMoveEvent(self, e): """ desc: Handles drag-move events to see if the item tree can handle incoming drops. arguments: e: desc: A drag-move event. type: QDragMoveEvent """ data = drag_and_drop.receive(e) if drag_and_drop.matches(data, [u'url-local']): e.accept() return if not drag_and_drop.matches(data, [u'item-new', u'item-existing']): e.accept() return target = self.itemAt(e.pos()) if not self.droppable(target, data): e.ignore() return e.accept()
def drop_event_item_move(self, data, e):
"""
desc:
Handles drop events for item moves.
arguments:
data:
desc: A drop-data dictionary.
type: dict:
e:
desc: A drop event.
type: QDropEvent
"""
if not drag_and_drop.matches(data, [u"item-existing"]):
e.ignore()
return
target_treeitem = self.itemAt(e.pos())
if not self.droppable(target_treeitem, data):
debug.msg(u"Drop ignored: target not droppable")
self.main_window.set_status(_(u"Drop cancelled: Target not droppable"))
e.ignore()
return
# If the drop comes from this application, check for recursion etc.
if data[u"application-id"] == self.main_window._id():
target_item_name, target_item_ancestry = target_treeitem.ancestry()
item_name = data[u"item-name"]
item = self.experiment.items[item_name]
if target_item_name in item.children():
debug.msg(u"Drop ignored: recursion prevented")
self.main_window.set_status(_(u"Drop cancelled: Recursion prevented"))
e.ignore()
return
parent_item_name, index = self.parent_from_ancestry(data[u"ancestry"])
if parent_item_name == None:
debug.msg(u"Drop ignored: no parent")
e.ignore()
return
# The logic below is a bit complicated, but works as follows:
# - If we're in a move action, remove the dragged item from its parent,
# and set need_restore so that we know this happened.
# - Try to drop the dragged item onto the target item
# - If the drop action was unsuccesful, and if need_restore is set,
# re-add the dragged item to its former parent.
need_restore = False
if not QtCore.Qt.ControlModifier & e.keyboardModifiers() and data[u"application-id"] == self.main_window._id():
if parent_item_name not in self.experiment.items:
debug.msg(u"Don't know how to remove item from %s" % parent_item_name)
else:
self.locked = True
need_restore = True
self.experiment.items[parent_item_name].remove_child_item(item_name, index)
self.locked = False
if self.drop_event_item_new(data, e, target_treeitem=target_treeitem):
return
if need_restore:
self.experiment.items[parent_item_name].insert_child_item(item_name, index)
self.experiment.build_item_tree()
def dragMoveEvent(self, e):
"""
desc:
Handles drag-move events to see if the item tree can handle
incoming drops.
arguments:
e:
desc: A drag-move event.
type: QDragMoveEvent
"""
data = drag_and_drop.receive(e)
self.drop_indicator = None
if drag_and_drop.matches(data, [u'url-local']):
e.accept()
self.end_drag()
return
if not drag_and_drop.matches(data,
[u'item-snippet', u'item-existing']):
e.accept()
self.end_drag()
return
target = self.itemAt(e.pos())
if not self.droppable(target, data):
self.end_drag()
e.ignore()
return
e.accept()
# Update the drop indicator
index = self.indexFromItem(target)
rect = self.visualRect(index)
if target.name == u'__unused__' or ( \
target.item.name in self.experiment.items.used() and \
isinstance(target.item, qtstructure_item) and \
target.item.name != self.experiment.var.start and \
target.parent() is not None):
self.drop_indicator = rect
else:
self.drop_indicator = QtCore.QRect(rect.left(), rect.bottom(),
rect.width(), 0)
self.viewport().update()
def dragMoveEvent(self, e):
"""
desc:
Handles drag-move events to see if the item tree can handle
incoming drops.
arguments:
e:
desc: A drag-move event.
type: QDragMoveEvent
"""
data = drag_and_drop.receive(e)
self.drop_indicator = None
if drag_and_drop.matches(data, [u"url-local"]):
e.accept()
self.end_drag()
return
if not drag_and_drop.matches(data, [u"item-snippet", u"item-existing"]):
e.accept()
self.end_drag()
return
target = self.itemAt(e.pos())
if not self.droppable(target, data):
self.end_drag()
e.ignore()
return
e.accept()
# Update the drop indicator
index = self.indexFromItem(target)
rect = self.visualRect(index)
if target.name == u"__unused__" or (
target.item.name in self.experiment.items.used()
and isinstance(target.item, qtstructure_item)
and target.item.name != self.experiment.var.start
and target.parent() is not None
):
self.drop_indicator = rect
else:
self.drop_indicator = QtCore.QRect(rect.left(), rect.bottom(), rect.width(), 0)
self.viewport().update()
def dragMoveEvent(self, e): """ desc: Handles drag-move events to see if the item tree can handle incoming drops. arguments: e: desc: A drag-move event. type: QDragMoveEvent """ data = drag_and_drop.receive(e) self.drop_indicator = None if drag_and_drop.matches(data, [u'url-local']): e.accept() self.end_drag() return if not drag_and_drop.matches(data, [u'item-new', u'item-existing']): e.accept() self.end_drag() return target = self.itemAt(e.pos()) if not self.droppable(target, data): self.end_drag() e.ignore() return e.accept() # Update the drop indicator index = self.indexFromItem(target) rect = self.visualRect(index) if target.name == u'__unused__' or ( target.item.item_type in (u'loop', u'sequence') and \ target.item.name != self.experiment.start and \ target.parent() is not None): self.drop_indicator = rect else: self.drop_indicator = QtCore.QRect(rect.left(), rect.bottom(), rect.width(), 0) self.viewport().update()
def drop_event_item_move(self, data, e): """ desc: Handles drop events for item moves. arguments: data: desc: A drop-data dictionary. type: dict: e: desc: A drop event. type: QDropEvent """ if not drag_and_drop.matches(data, [u'item-existing']): e.ignore() return target_treeitem = self.itemAt(e.pos()) if not self.droppable(target_treeitem, data): debug.msg(u'Drop ignored: target not droppable') self.main_window.set_status( _(u'Drop cancelled: Target not droppable')) e.ignore() return target_item_name, target_item_ancestry = target_treeitem.ancestry() item_name = data[u'item-name'] item = self.experiment.items[item_name] if target_item_name in item.children(): debug.msg(u'Drop ignored: recursion prevented') self.main_window.set_status( _(u'Drop cancelled: Recursion prevented')) e.ignore() return parent_item_name, index = self.parent_from_ancestry(data[u'ancestry']) if parent_item_name == None: debug.msg(u'Drop ignored: no parent') e.ignore() return if not QtCore.Qt.ControlModifier & e.keyboardModifiers(): if parent_item_name not in self.experiment.items: debug.msg(u'Don\'t know how to remove item from %s' \ % parent_item_name) else: self.locked = True self.experiment.items[parent_item_name].remove_child_item( item_name, index) self.locked = False self.drop_event_item_new(data, e, target_treeitem=target_treeitem)
def drop_event_item_move(self, data, e):
"""
desc:
Handles drop events for item moves.
arguments:
data:
desc: A drop-data dictionary.
type: dict:
e:
desc: A drop event.
type: QDropEvent
"""
if not drag_and_drop.matches(data, [u'item-existing']):
e.ignore()
return
target_treeitem = self.itemAt(e.pos())
if not self.droppable(target_treeitem, data):
debug.msg(u'Drop ignored: target not droppable')
self.main_window.set_status(
_(u'Drop cancelled: Target not droppable'))
e.ignore()
return
target_item_name, target_item_ancestry = target_treeitem.ancestry()
item_name = data[u'item-name']
if target_item_ancestry.startswith(u'%s:' % item_name) or \
u'.%s:' % item_name in target_item_ancestry:
debug.msg(u'Drop ignored: recursion prevented')
self.main_window.set_status(
_(u'Drop cancelled: Recursion prevented'))
e.ignore()
return
parent_item_name, index = self.parent_from_ancestry(data[u'ancestry'])
if parent_item_name == None:
debug.msg(u'Drop ignored: no parent')
e.ignore()
return
if not QtCore.Qt.ControlModifier & e.keyboardModifiers():
if parent_item_name not in self.experiment.items:
debug.msg(u'Don\'t know how to remove item from %s' \
% parent_item_name)
else:
self.experiment.items[parent_item_name].remove_child_item(
item_name, index)
self.drop_event_item_new(data, e)
def dragEnterEvent(self, e):
"""
desc:
Handles drag-enter events to see if the item tree can handle
incoming drops.
arguments:
e:
desc: A drag-enter event.
type: QDragEnterEvent
"""
data = drag_and_drop.receive(e)
if drag_and_drop.matches(
data, [u'item-new', u'item-existing', u'url-local']):
e.accept()
else:
e.ignore()
def dragEnterEvent(self, e):
"""
desc:
Handles drag-enter events to see if the item tree can handle
incoming drops.
arguments:
e:
desc: A drag-enter event.
type: QDragEnterEvent
"""
data = drag_and_drop.receive(e)
if drag_and_drop.matches(data, [u"item-new", u"item-existing", u"url-local"]):
e.accept()
else:
e.ignore()
def dragEnterEvent(self, e):
"""
desc:
Handles drag-enter events to see if they are supported
arguments:
e:
desc: A drag-enter event.
type: QDragEnterEvent
"""
if not hasattr(self, u'supported_drop_types'):
e.ignore()
return
data = drag_and_drop.receive(e)
if drag_and_drop.matches(data, self.supported_drop_types):
e.accept()
else:
e.ignore()
def dropEvent(self, e):
"""
desc:
Handles drop events and accepts them if supported.
arguments:
e:
desc: A drop event.
type: QDropEvent
"""
if not hasattr(self, u'supported_drop_types'):
e.ignore()
return
data = drag_and_drop.receive(e)
if drag_and_drop.matches(data, self.supported_drop_types):
e.accept()
self.accept_drop(data)
else:
e.ignore()
def dragEnterEvent(self, e): """ desc: Handles drag-enter events to see if they are supported arguments: e: desc: A drag-enter event. type: QDragEnterEvent """ if not hasattr(self, u'supported_drop_types'): e.ignore() return data = drag_and_drop.receive(e) if drag_and_drop.matches(data, self.supported_drop_types): e.accept() else: e.ignore()
def clipboard_data(self):
"""
desc:
Gets an item data dictionary from the clipboard.
returns:
desc: A data dictionary or None if no valid data was found.
type: [dict, NoneType]
"""
import json
from libqtopensesame.misc import drag_and_drop
text = QtWidgets.QApplication.clipboard().text()
try:
data = json.loads(text)
except:
return None
if drag_and_drop.matches(data, [u'item-snippet', u'item-existing']):
return data
return None
def dropEvent(self, e): """ desc: Handles drop events and accepts them if supported. arguments: e: desc: A drop event. type: QDropEvent """ if not hasattr(self, u'supported_drop_types'): e.ignore() return data = drag_and_drop.receive(e) if drag_and_drop.matches(data, self.supported_drop_types): e.accept() self.accept_drop(data) else: e.ignore()
def clipboard_data(self): """ desc: Gets an item data dictionary from the clipboard. returns: desc: A data dictionary or None if no valid data was found. type: [dict, NoneType] """ import json from libqtopensesame.misc import drag_and_drop text = unicode(QtGui.QApplication.clipboard().text()) try: data = json.loads(text) except: return None if drag_and_drop.matches(data, [u'item-new']): return data return None
def drop_event_item_existing(self, data, e=None, target_treeitem=None):
"""
desc:
Handles drop events for item moves.
arguments:
data:
desc: A drop-data dictionary.
type: dict:
e:
desc: A drop event.
type: QDropEvent
"""
if not drag_and_drop.matches(data, [u'item-existing']):
if e is not None:
e.ignore()
return
# Only accept existing-item drops from this application
if data[u'application-id'] != self.main_window._id():
debug.msg(u'Drop ignored: from different instance')
if e is not None:
e.ignore()
return
if target_treeitem is None:
target_treeitem = self.itemAt(e.pos())
if not self.droppable(target_treeitem, data):
debug.msg(u'Drop ignored: target not droppable')
if e is not None:
e.ignore()
return
# Don't drop on the same item that was the source (if any)
if u'QTreeWidgetItem' in data and \
data[u'QTreeWidgetItem'] == str(target_treeitem):
debug.msg(u'Drop ignored: dropping on self')
if e is not None:
e.ignore()
return
item_name = data[u'item-name']
# Check for recursion when dropping sequences and loops. The target item
# may not have the dropped item in its ancestry. However, the target
# item may occur multiple times in the experiment, so we need to check
# that this constraint holds for all linked copies of the target item.
if data.get(u'structure-item', False):
for linked_target_treeitem in self.findItems(
target_treeitem.name,
QtCore.Qt.MatchFixedString | QtCore.Qt.MatchRecursive):
target_item_name, target_item_ancestry = \
linked_target_treeitem.ancestry()
if target_item_ancestry.startswith(u'%s:' % item_name) or \
u'.%s:' % item_name in target_item_ancestry:
debug.msg(u'Drop ignored: recursion prevented')
if e is not None:
e.ignore()
return
# Don't drop on undroppable parents
parent_item_name, index = self.parent_from_ancestry(data[u'ancestry'])
if parent_item_name is None:
debug.msg(u'Drop ignored: no parent')
if e is not None:
e.ignore()
return
# The logic below is a bit complicated, but works as follows:
# - If we're in a move action, remove the dragged item from its parent,
# and set need_restore so that we know this happened.
# - Try to drop the dragged item onto the target item
# - If the drop action was unsuccesful, and if need_restore is set,
# re-add the dragged item to its former parent.
need_restore = False
if data[u'move']:
if parent_item_name not in self.experiment.items:
debug.msg(u'Don\'t know how to remove item from %s' \
% parent_item_name)
else:
self.locked = True
need_restore = True
self.experiment.items[parent_item_name].remove_child_item(
item_name, index)
self.locked = False
if self.drop_event_item_new(data, e, target_treeitem=target_treeitem):
return
if need_restore:
self.experiment.items[parent_item_name].insert_child_item(
item_name, index)
self.experiment.build_item_tree()
def drop_event_item_existing(self, data, e=None, target_treeitem=None): """ desc: Handles drop events for item moves. arguments: data: desc: A drop-data dictionary. type: dict: e: desc: A drop event. type: QDropEvent """ if not drag_and_drop.matches(data, [u'item-existing']): if e is not None: e.ignore() return # Only accept existing-item drops from this application if data[u'application-id'] != self.main_window._id(): debug.msg(u'Drop ignored: from different instance') if e is not None: e.ignore() return if target_treeitem is None: target_treeitem = self.itemAt(e.pos()) if not self.droppable(target_treeitem, data): debug.msg(u'Drop ignored: target not droppable') if e is not None: e.ignore() return # Don't drop on the same item that was the source (if any) if u'QTreeWidgetItem' in data and \ data[u'QTreeWidgetItem'] == str(target_treeitem): debug.msg(u'Drop ignored: dropping on self') if e is not None: e.ignore() return item_name = data[u'item-name'] # Check for recursion when dropping sequences and loops if data[u'item-type'] in [u'sequence', u'loop']: target_item_name, target_item_ancestry = target_treeitem.ancestry() if target_item_ancestry.startswith(u'%s:' % item_name) or \ u'.%s:' % item_name in target_item_ancestry: debug.msg(u'Drop ignored: recursion prevented') if e is not None: e.ignore() return # Don't drop on undroppable parents parent_item_name, index = self.parent_from_ancestry(data[u'ancestry']) if parent_item_name is None: debug.msg(u'Drop ignored: no parent') if e is not None: e.ignore() return # The logic below is a bit complicated, but works as follows: # - If we're in a move action, remove the dragged item from its parent, # and set need_restore so that we know this happened. # - Try to drop the dragged item onto the target item # - If the drop action was unsuccesful, and if need_restore is set, # re-add the dragged item to its former parent. need_restore = False if data[u'move']: if parent_item_name not in self.experiment.items: debug.msg(u'Don\'t know how to remove item from %s' \ % parent_item_name) else: self.locked = True need_restore = True self.experiment.items[parent_item_name].remove_child_item( item_name, index) self.locked = False if self.drop_event_item_new(data, e, target_treeitem=target_treeitem): return if need_restore: self.experiment.items[parent_item_name].insert_child_item( item_name, index) self.experiment.build_item_tree()
def droppable(self, data): return drag_and_drop.matches(data, [u'item-existing']) and \ data[u'application-id'] == self.main_window._id()
def drop_event_item_new(self, data, e=None, target_treeitem=None):
"""
desc:
Handles drop events for item creation.
arguments:
data:
desc: A drop-data dictionary.
type: dict:
keywords:
e:
desc: A drop event or None if a target treeitem is provided.
type: [QDropEvent, NoneType]
target_treeitem:
desc: A target tree item or None in a drop event is specified.
type: [tree_base_item, NoneType]
returns:
desc: True if the drop was successful, False otherwise.
type: bool
"""
self.main_window.set_busy(True)
if not drag_and_drop.matches(data, [u'item-snippet', u'item-existing']):
if e is not None:
e.ignore()
self.main_window.set_busy(False)
return False
if data[u'type'] == u'item-existing' and \
data[u'item-name'] not in self.experiment.items:
self.experiment.notify(_(u'Cannot create linked copy of "%s". Has '
u'the item been permanently deleted?') % data[u'item-name'])
if e is not None:
e.ignore()
self.main_window.set_busy(False)
return False
# Ignore drops on non-droppable tree items.
if target_treeitem is None:
target_treeitem = self.itemAt(e.pos())
if not self.droppable(target_treeitem, data):
if e is not None:
e.ignore()
self.main_window.set_busy(False)
return False
# Accept drops on the unused items bin and unused items (i.e. items
# in the bin)
if target_treeitem.name == u'__unused__' or \
(target_treeitem.parent() is not None and \
target_treeitem.parent().name == u'__unused__'):
e.accept()
self.structure_change.emit()
self.main_window.set_busy(False)
return True
# Get the target item, check if it exists, and, if so, drop the source
# item on it.
target_item_name = target_treeitem.text(0)
if target_item_name not in self.experiment.items:
debug.msg(u'Don\'t know how to drop on %s' % target_item_name)
if e is not None:
e.ignore()
self.structure_change.emit()
self.main_window.set_busy(False)
return False
target_item = self.experiment.items[target_item_name]
if data[u'type'] == u'item-existing':
item, new_items = self.drop_get_item_existing(data)
else:
item, new_items = self.drop_get_item_snippet(data)
inserted = False
# If the item has no parent or if it is the experiment starting point,
# we insert into it directly.
if target_treeitem.parent() is None or \
target_item.name == self.experiment.var.start:
target_item.insert_child_item(item.name)
inserted = True
else:
if target_item.item_type in (u'loop', u'sequence'):
self.main_window.set_busy(False)
# Choose appropriate option
if target_item.item_type == u'loop':
question = _('Set as item to run for %s') % target_item.name
icon = u'os-loop'
else:
question = _('Insert into %s') % target_item.name
icon = u'os-sequence'
resp = popup_menu(self, [(0, question, icon),
(1, _('Insert after %s' % target_item.name), 'list-add')
]).show()
# Confirmation
if resp == 0 and target_item.item_type == u'loop' and \
target_item.var.item in self.experiment.items:
resp = popup_menu(self, [(0, _(u'I know, do it!'), icon)],
title=_(u'This will replace %s' % (target_item.item))
).show()
# If the popup was cancelled
if resp is None:
if e is not None:
e.accept()
self.main_window.set_busy(False)
for item in new_items:
del self.experiment.items[item]
return False
# If the user chose to insert into the target item
if resp == 0:
target_item.insert_child_item(item.name)
inserted = True
# Otherwise, we find the parent of the target item, and insert the
# new item at the correct position.
if not inserted:
while True:
try:
parent_treeitem = target_treeitem.parent()
except:
# A race condition can occur in which the tree_overview has
# been rebuild, thus destroying target_treeitem. If this
# happens, we re-take target_treeitem based on the mouse
# coordinates.
target_treeitem = self.itemAt(e.pos())
parent_treeitem = target_treeitem.parent()
if parent_treeitem is None:
e.accept()
del self.experiment.items[item.name]
self.main_window.set_busy(False)
return False
parent_item_name = str(parent_treeitem.text(0))
parent_item = self.experiment.items[parent_item_name]
if isinstance(parent_item, sequence):
break
target_treeitem = parent_treeitem
index = parent_treeitem.indexOfChild(target_treeitem)+1
parent_item.insert_child_item(item.name, index=index)
if e is not None:
e.accept()
self.structure_change.emit()
if self.overview_mode:
item.open_tab()
self.main_window.set_busy(False)
return True
def drop_event_item_new(self, data, e=None, target_treeitem=None):
"""
desc:
Handles drop events for item creation.
arguments:
data:
desc: A drop-data dictionary.
type: dict:
keywords:
e:
desc: A drop event or None if a target treeitem is provided.
type: [QDropEvent, NoneType]
target_treeitem:
desc: A target tree item or None in a drop event is specified.
type: [tree_base_item, NoneType]
returns:
desc: True if the drop was successful, False otherwise.
type: bool
"""
self.main_window.set_busy(True)
if not drag_and_drop.matches(data, [u"item-snippet", u"item-existing"]):
if e is not None:
e.ignore()
self.main_window.set_busy(False)
return False
if data[u"type"] == u"item-existing" and data[u"item-name"] not in self.experiment.items:
self.experiment.notify(
_(u'Cannot create linked copy of "%s". Has ' u"the item been permanently deleted?") % data[u"item-name"]
)
if e is not None:
e.ignore()
self.main_window.set_busy(False)
return False
# Ignore drops on non-droppable tree items.
if target_treeitem is None:
target_treeitem = self.itemAt(e.pos())
if not self.droppable(target_treeitem, data):
if e is not None:
e.ignore()
self.main_window.set_busy(False)
return False
# Accept drops on the unused items bin and unused items (i.e. items
# in the bin)
if target_treeitem.name == u"__unused__" or (
target_treeitem.parent() is not None and target_treeitem.parent().name == u"__unused__"
):
e.accept()
self.structure_change.emit()
self.main_window.set_busy(False)
return True
# Get the target item, check if it exists, and, if so, drop the source
# item on it.
target_item_name = target_treeitem.text(0)
if target_item_name not in self.experiment.items:
debug.msg(u"Don't know how to drop on %s" % target_item_name)
if e is not None:
e.ignore()
self.structure_change.emit()
self.main_window.set_busy(False)
return False
target_item = self.experiment.items[target_item_name]
if data[u"type"] == u"item-existing":
item, new_items = self.drop_get_item_existing(data)
else:
# Creating an item may fail, and we therefore need to clean up when
# this happens. But we don't catch the Exception itself, because it
# will be handled with higher up, for example by the bug_report
# extension.
try:
item = None
item, new_items = self.drop_get_item_snippet(data)
finally:
if item is None:
if e is not None:
e.ignore()
self.structure_change.emit()
self.main_window.set_busy(False)
self.end_drag()
inserted = False
# If the item has no parent or if it is the experiment starting point,
# we insert into it directly.
if target_treeitem.parent() is None or target_item.name == self.experiment.var.start:
target_item.insert_child_item(item.name)
inserted = True
else:
if isinstance(target_item, qtstructure_item):
self.main_window.set_busy(False)
resp = popup_menu(
self,
[
(0, _("Insert into %s") % target_item.name, u"go-next"),
(1, _("Insert after %s") % target_item.name, u"go-down"),
],
).show()
# If the popup was cancelled
if resp is None:
if e is not None:
e.accept()
self.main_window.set_busy(False)
for item in new_items:
del self.experiment.items[item]
return False
# If the user chose to insert into the target item
if resp == 0:
target_item.insert_child_item(item.name)
inserted = True
# Otherwise, we find the parent of the target item, and insert the
# new item at the correct position.
if not inserted:
while True:
try:
parent_treeitem = target_treeitem.parent()
except:
# A race condition can occur in which the tree_overview has
# been rebuild, thus destroying target_treeitem. If this
# happens, we re-take target_treeitem based on the mouse
# coordinates.
target_treeitem = self.itemAt(e.pos())
parent_treeitem = target_treeitem.parent()
if parent_treeitem is None:
e.accept()
del self.experiment.items[item.name]
self.main_window.set_busy(False)
return False
parent_item_name = str(parent_treeitem.text(0))
parent_item = self.experiment.items[parent_item_name]
if isinstance(parent_item, sequence):
break
target_treeitem = parent_treeitem
index = parent_treeitem.indexOfChild(target_treeitem) + 1
parent_item.insert_child_item(item.name, index=index)
if e is not None:
e.accept()
self.structure_change.emit()
if self.overview_mode:
item.open_tab()
self.main_window.set_busy(False)
return True
def drop_event_item_existing(self, data, e=None, target_treeitem=None):
"""
desc:
Handles drop events for item moves.
arguments:
data:
desc: A drop-data dictionary.
type: dict:
e:
desc: A drop event.
type: QDropEvent
"""
if not drag_and_drop.matches(data, [u"item-existing"]):
if e is not None:
e.ignore()
return
# Only accept existing-item drops from this application
if data[u"application-id"] != self.main_window._id():
debug.msg(u"Drop ignored: from different instance")
if e is not None:
e.ignore()
return
if target_treeitem is None:
target_treeitem = self.itemAt(e.pos())
if not self.droppable(target_treeitem, data):
debug.msg(u"Drop ignored: target not droppable")
if e is not None:
e.ignore()
return
# Don't drop on the same item that was the source (if any)
if u"QTreeWidgetItem" in data and data[u"QTreeWidgetItem"] == str(target_treeitem):
debug.msg(u"Drop ignored: dropping on self")
if e is not None:
e.ignore()
return
item_name = data[u"item-name"]
# Check for recursion when dropping sequences and loops. The target item
# may not have the dropped item in its ancestry. However, the target
# item may occur multiple times in the experiment, so we need to check
# that this constraint holds for all linked copies of the target item.
if data.get(u"structure-item", False):
for linked_target_treeitem in self.findItems(
target_treeitem.name, QtCore.Qt.MatchFixedString | QtCore.Qt.MatchRecursive
):
target_item_name, target_item_ancestry = linked_target_treeitem.ancestry()
if target_item_ancestry.startswith(u"%s:" % item_name) or u".%s:" % item_name in target_item_ancestry:
debug.msg(u"Drop ignored: recursion prevented")
if e is not None:
e.ignore()
return
# Don't drop on undroppable parents
parent_item_name, index = self.parent_from_ancestry(data[u"ancestry"])
if parent_item_name is None:
debug.msg(u"Drop ignored: no parent")
if e is not None:
e.ignore()
return
# The logic below is a bit complicated, but works as follows:
# - If we're in a move action, remove the dragged item from its parent,
# and set need_restore so that we know this happened.
# - Try to drop the dragged item onto the target item
# - If the drop action was unsuccesful, and if need_restore is set,
# re-add the dragged item to its former parent.
need_restore = False
if data[u"move"]:
if parent_item_name not in self.experiment.items:
debug.msg(u"Don't know how to remove item from %s" % parent_item_name)
else:
self.locked = True
need_restore = True
self.experiment.items[parent_item_name].remove_child_item(item_name, index)
self.locked = False
if self.drop_event_item_new(data, e, target_treeitem=target_treeitem):
return
if need_restore:
self.experiment.items[parent_item_name].insert_child_item(item_name, index)
self.experiment.build_item_tree()
def droppable(self, data): return drag_and_drop.matches(data, [u'item-existing'])
def drop_event_item_new(self, data, e=None, target_treeitem=None):
"""
desc:
Handles drop events for item creation.
arguments:
data:
desc: A drop-data dictionary.
type: dict:
keywords:
e:
desc: A drop event or None if a target treeitem is provided.
type: [QDropEvent, NoneType]
target_treeitem:
desc: A target tree item or None in a drop event is specified.
type: [tree_base_item, NoneType]
returns:
desc: True if the drop was successful, False otherwise.
type: bool
"""
self.main_window.set_busy(True)
if not drag_and_drop.matches(data, [u"item-existing", u"item-new"]):
if e != None:
e.ignore()
self.main_window.set_busy(False)
return False
# Ignore drops on non-droppable tree items.
if target_treeitem == None:
target_treeitem = self.itemAt(e.pos())
if not self.droppable(target_treeitem, data):
if e != None:
e.ignore()
self.main_window.set_busy(False)
return False
# Accept drops on the unused items bin and unused items (i.e. items
# in the bin)
if target_treeitem.name == u"__unused__" or (
target_treeitem.parent() is not None and target_treeitem.parent().name == u"__unused__"
):
e.accept()
self.structure_change.emit()
self.main_window.set_busy(False)
return True
# Get the target item, check if it exists, and, if so, drop the source
# item on it.
target_item_name = unicode(target_treeitem.text(0))
if target_item_name not in self.experiment.items:
debug.msg(u"Don't know how to drop on %s" % target_item_name)
if e != None:
e.ignore()
self.structure_change.emit()
self.main_window.set_busy(False)
return False
target_item = self.experiment.items[target_item_name]
# Get the item to be inserted. If the drop type is item-new, we need
# to create a new item, otherwise we get an existin item. Also, if
# the drop doesn't originate from this application, we create a new
# item.
if data[u"type"] == u"item-new" or data[u"application-id"] != self.main_window._id():
try:
item = self.experiment.items.new(data[u"item-type"], data[u"item-name"], data[u"script"])
except Exception as ex:
if not isinstance(e, osexception):
ex = osexception(msg=u"Plug-in error", exception=ex)
self.notify(u"Failed to load plug-in %s (see debug window for stack trace)" % data[u"item-type"])
self.main_window.print_debug_window(ex)
e.accept()
self.main_window.set_busy(False)
return False
self.extension_manager.fire(u"new_item", name=data[u"item-name"], _type=data[u"item-type"])
else:
item = self.experiment.items[data[u"item-name"]]
inserted = False
# If the item has no parent or if it is the experiment starting point,
# we insert into it directly.
if target_treeitem.parent() == None or target_item.name == self.experiment.start:
target_item.insert_child_item(item.name)
inserted = True
else:
if target_item.item_type in (u"loop", u"sequence"):
self.main_window.set_busy(False)
# Choose appropriate option
if target_item.item_type == u"loop":
question = _("Set as item to run for %s") % target_item.name
icon = u"os-loop"
else:
question = _("Insert into %s") % target_item.name
icon = u"os-sequence"
resp = popup_menu(
self, [(0, question, icon), (1, _("Insert after %s" % target_item.name), "list-add")]
).show()
# Confirmation
if resp == 0 and target_item.item_type == u"loop" and target_item.item in self.experiment.items:
resp = popup_menu(
self, [(0, _(u"I know, do it!"), icon)], title=_(u"This will replace %s" % (target_item.item))
).show()
# If the popup was cancelled
if resp == None:
e.accept()
# Delete the item if it was new or didn't originate from
# this application.
if data[u"type"] == u"item-new" or data[u"application-id"] != self.main_window._id():
del self.experiment.items[item.name]
self.main_window.set_busy(False)
return False
# If the user chose to insert into the target item
if resp == 0:
target_item.insert_child_item(item.name)
inserted = True
# Otherwise, we find the parent of the target item, and insert the
# new item at the correct position.
if not inserted:
while True:
try:
parent_treeitem = target_treeitem.parent()
except:
# A race condition can occur in which the tree_overview has
# been rebuild, thus destroying target_treeitem. If this
# happens, we re-take target_treeitem based on the mouse
# coordinates.
target_treeitem = self.itemAt(e.pos())
parent_treeitem = target_treeitem.parent()
if parent_treeitem == None:
e.accept()
del self.experiment.items[item.name]
self.main_window.set_busy(False)
return False
parent_item_name = unicode(parent_treeitem.text(0))
parent_item = self.experiment.items[parent_item_name]
if isinstance(parent_item, sequence):
break
target_treeitem = parent_treeitem
index = parent_treeitem.indexOfChild(target_treeitem) + 1
parent_item.insert_child_item(item.name, index=index)
if e != None:
e.accept()
self.structure_change.emit()
if self.overview_mode:
item.open_tab()
self.main_window.set_busy(False)
return True
def drop_event_item_new(self, data, e=None, target_treeitem=None):
"""
desc:
Handles drop events for item creation.
arguments:
data:
desc: A drop-data dictionary.
type: dict:
keywords:
e:
desc: A drop event or None if a target treeitem is provided.
type: [QDropEvent, NoneType]
target_treeitem:
desc: A target tree item or None in a drop event is specified.
type: [tree_base_item, NoneType]
"""
self.main_window.set_busy(True)
if not drag_and_drop.matches(data, [u'item-existing', u'item-new']):
if e != None:
e.ignore()
self.main_window.set_busy(False)
return
# Ignore drops on non-droppable tree items.
if target_treeitem == None:
target_treeitem = self.itemAt(e.pos())
if not self.droppable(target_treeitem, data):
if e != None:
e.ignore()
self.main_window.set_busy(False)
return
# Get the target item, check if it exists, and, if so, drop the source
# item on it.
target_item_name = unicode(target_treeitem.text(0))
if target_item_name not in self.experiment.items:
debug.msg(u'Don\'t know how to drop on %s' % target_item_name)
if e != None:
e.ignore()
self.structure_change.emit()
self.main_window.set_busy(False)
return
target_item = self.experiment.items[target_item_name]
# Get the item to be inserted. If the drop type is item-new, we need
# to create a new item, otherwise we get an existin item. Also, if
# the drop doesn't originate from this application, we create a new
# item.
if data[u'type'] == u'item-new' \
or data[u'application-id'] != self.main_window._id():
try:
item = self.experiment.items.new(data[u'item-type'],
data[u'item-name'], data[u'script'])
except Exception as ex:
if not isinstance(e, osexception):
ex = osexception(msg=u'Plug-in error', exception=ex)
self.notify(
u'Failed to load plug-in %s (see debug window for stack trace)' \
% data[u'item-type'])
self.main_window.print_debug_window(ex)
e.accept()
self.main_window.set_busy(False)
return
self.extension_manager.fire(u'new_item',
name=data[u'item-name'], _type=data[u'item-type'])
else:
item = self.experiment.items[data[u'item-name']]
inserted = False
# If the item has no parent or if it is the experiment starting point,
# we insert into it directly.
if target_treeitem.parent() == None or \
target_item.name == self.experiment.start:
target_item.insert_child_item(item.name)
inserted = True
else:
if target_item.item_type in (u'loop', u'sequence'):
self.main_window.set_busy(False)
# Choose appropriate option
if target_item.item_type == u'loop':
question = _('Set as item to run for %s') % target_item.name
icon = u'os-loop'
else:
question = _('Insert into %s') % target_item.name
icon = u'os-sequence'
resp = popup_menu(self, [(0, question, icon),
(1, _('Insert after %s' % target_item.name), 'list-add')
]).show()
# If the popup was cancelled
if resp == None:
e.accept()
del self.experiment.items[item.name]
self.main_window.set_busy(False)
return
# If the user chose to insert into the target item
if resp == 0:
target_item.insert_child_item(item.name)
inserted = True
# Otherwise, we find the parent of the target item, and insert the
# new item at the correct position.
if not inserted:
while True:
try:
parent_treeitem = target_treeitem.parent()
except:
# A race condition can occur in which the tree_overview has
# been rebuild, thus destroying target_treeitem. If this
# happens, we re-take target_treeitem based on the mouse
# coordinates.
target_treeitem = self.itemAt(e.pos())
parent_treeitem = target_treeitem.parent()
if parent_treeitem == None:
e.accept()
del self.experiment.items[item.name]
self.main_window.set_busy(False)
return
parent_item_name = unicode(parent_treeitem.text(0))
parent_item = self.experiment.items[parent_item_name]
if isinstance(parent_item, sequence):
break
target_treeitem = parent_treeitem
index = parent_treeitem.indexOfChild(target_treeitem)+1
parent_item.insert_child_item(item.name, index=index)
if e != None:
e.accept()
self.structure_change.emit()
if self.overview_mode:
item.open_tab()
self.main_window.set_busy(False)
def droppable(self, data): return drag_and_drop.matches(data, [u'item-existing']) and \ data[u'application-id'] == self.main_window._id()
def drop_event_item_new(self, data, e=None, target_treeitem=None):
"""
desc:
Handles drop events for item creation.
arguments:
data:
desc: A drop-data dictionary.
type: dict:
keywords:
e:
desc: A drop event or None if a target treeitem is provided.
type: [QDropEvent, NoneType]
target_treeitem:
desc: A target tree item or None in a drop event is specified.
type: [tree_base_item, NoneType]
returns:
desc: True if the drop was successful, False otherwise.
type: bool
"""
self.main_window.set_busy(True)
if not drag_and_drop.matches(data, [u'item-snippet', u'item-existing']):
if e is not None:
e.ignore()
self.main_window.set_busy(False)
return False
# Ignore drops on non-droppable tree items.
if target_treeitem is None:
target_treeitem = self.itemAt(e.pos())
if not self.droppable(target_treeitem, data):
if e is not None:
e.ignore()
self.main_window.set_busy(False)
return False
# Accept drops on the unused items bin and unused items (i.e. items
# in the bin)
if target_treeitem.name == u'__unused__' or \
(target_treeitem.parent() is not None and \
target_treeitem.parent().name == u'__unused__'):
e.accept()
self.structure_change.emit()
self.main_window.set_busy(False)
return True
# Get the target item, check if it exists, and, if so, drop the source
# item on it.
target_item_name = target_treeitem.text(0)
if target_item_name not in self.experiment.items:
debug.msg(u'Don\'t know how to drop on %s' % target_item_name)
if e is not None:
e.ignore()
self.structure_change.emit()
self.main_window.set_busy(False)
return False
target_item = self.experiment.items[target_item_name]
if data[u'type'] == u'item-existing':
item, new_items = self.drop_get_item_existing(data)
else:
item, new_items = self.drop_get_item_snippet(data)
inserted = False
# If the item has no parent or if it is the experiment starting point,
# we insert into it directly.
if target_treeitem.parent() is None or \
target_item.name == self.experiment.var.start:
target_item.insert_child_item(item.name)
inserted = True
else:
if target_item.item_type in (u'loop', u'sequence'):
self.main_window.set_busy(False)
# Choose appropriate option
if target_item.item_type == u'loop':
question = _('Set as item to run for %s') % target_item.name
icon = u'os-loop'
else:
question = _('Insert into %s') % target_item.name
icon = u'os-sequence'
resp = popup_menu(self, [(0, question, icon),
(1, _('Insert after %s' % target_item.name), 'list-add')
]).show()
# Confirmation
if resp == 0 and target_item.item_type == u'loop' and \
target_item.var.item in self.experiment.items:
resp = popup_menu(self, [(0, _(u'I know, do it!'), icon)],
title=_(u'This will replace %s' % (target_item.item))
).show()
# If the popup was cancelled
if resp is None:
if e is not None:
e.accept()
self.main_window.set_busy(False)
for item in new_items:
del self.experiment.items[item]
return False
# If the user chose to insert into the target item
if resp == 0:
target_item.insert_child_item(item.name)
inserted = True
# Otherwise, we find the parent of the target item, and insert the
# new item at the correct position.
if not inserted:
while True:
try:
parent_treeitem = target_treeitem.parent()
except:
# A race condition can occur in which the tree_overview has
# been rebuild, thus destroying target_treeitem. If this
# happens, we re-take target_treeitem based on the mouse
# coordinates.
target_treeitem = self.itemAt(e.pos())
parent_treeitem = target_treeitem.parent()
if parent_treeitem is None:
e.accept()
del self.experiment.items[item.name]
self.main_window.set_busy(False)
return False
parent_item_name = str(parent_treeitem.text(0))
parent_item = self.experiment.items[parent_item_name]
if isinstance(parent_item, sequence):
break
target_treeitem = parent_treeitem
index = parent_treeitem.indexOfChild(target_treeitem)+1
parent_item.insert_child_item(item.name, index=index)
if e is not None:
e.accept()
self.structure_change.emit()
if self.overview_mode:
item.open_tab()
self.main_window.set_busy(False)
return True
def drop_event_item_move(self, data, e): """ desc: Handles drop events for item moves. arguments: data: desc: A drop-data dictionary. type: dict: e: desc: A drop event. type: QDropEvent """ if not drag_and_drop.matches(data, [u'item-existing']): e.ignore() return target_treeitem = self.itemAt(e.pos()) if not self.droppable(target_treeitem, data): debug.msg(u'Drop ignored: target not droppable') self.main_window.set_status( _(u'Drop cancelled: Target not droppable')) e.ignore() return # If the drop comes from this application, check for recursion etc. if data[u'application-id'] == self.main_window._id(): target_item_name, target_item_ancestry = target_treeitem.ancestry() item_name = data[u'item-name'] item = self.experiment.items[item_name] if target_item_name in item.children(): debug.msg(u'Drop ignored: recursion prevented') self.main_window.set_status( _(u'Drop cancelled: Recursion prevented')) e.ignore() return parent_item_name, index = self.parent_from_ancestry( data[u'ancestry']) if parent_item_name == None: debug.msg(u'Drop ignored: no parent') e.ignore() return # The logic below is a bit complicated, but works as follows: # - If we're in a move action, remove the dragged item from its parent, # and set need_restore so that we know this happened. # - Try to drop the dragged item onto the target item # - If the drop action was unsuccesful, and if need_restore is set, # re-add the dragged item to its former parent. need_restore = False if not QtCore.Qt.ControlModifier & e.keyboardModifiers() and \ data[u'application-id'] == self.main_window._id(): if parent_item_name not in self.experiment.items: debug.msg(u'Don\'t know how to remove item from %s' \ % parent_item_name) else: self.locked = True need_restore = True self.experiment.items[parent_item_name].remove_child_item( item_name, index) self.locked = False if self.drop_event_item_new(data, e, target_treeitem=target_treeitem): return if need_restore: self.experiment.items[parent_item_name].insert_child_item( item_name, index) self.experiment.build_item_tree()
def droppable(self, data):
return drag_and_drop.matches(data, [u'item-existing'])
def drop_event_item_new(self, data, e=None, target_treeitem=None):
"""
desc:
Handles drop events for item creation.
arguments:
data:
desc: A drop-data dictionary.
type: dict:
keywords:
e:
desc: A drop event or None if a target treeitem is provided.
type: [QDropEvent, NoneType]
target_treeitem:
desc: A target tree item or None in a drop event is specified.
type: [tree_base_item, NoneType]
returns:
desc: True if the drop was successful, False otherwise.
type: bool
"""
self.main_window.set_busy(True)
if not drag_and_drop.matches(data, [u'item-existing', u'item-new']):
if e != None:
e.ignore()
self.main_window.set_busy(False)
return False
# Ignore drops on non-droppable tree items.
if target_treeitem == None:
target_treeitem = self.itemAt(e.pos())
if not self.droppable(target_treeitem, data):
if e != None:
e.ignore()
self.main_window.set_busy(False)
return False
# Accept drops on the unused items bin and unused items (i.e. items
# in the bin)
if target_treeitem.name == u'__unused__' or \
(target_treeitem.parent() is not None and \
target_treeitem.parent().name == u'__unused__'):
e.accept()
self.structure_change.emit()
self.main_window.set_busy(False)
return True
# Get the target item, check if it exists, and, if so, drop the source
# item on it.
target_item_name = unicode(target_treeitem.text(0))
if target_item_name not in self.experiment.items:
debug.msg(u'Don\'t know how to drop on %s' % target_item_name)
if e != None:
e.ignore()
self.structure_change.emit()
self.main_window.set_busy(False)
return False
target_item = self.experiment.items[target_item_name]
# Get the item to be inserted. If the drop type is item-new, we need
# to create a new item, otherwise we get an existin item. Also, if
# the drop doesn't originate from this application, we create a new
# item.
if data[u'type'] == u'item-new' \
or data[u'application-id'] != self.main_window._id():
try:
item = self.experiment.items.new(data[u'item-type'],
data[u'item-name'], data[u'script'])
except Exception as ex:
if not isinstance(e, osexception):
ex = osexception(msg=u'Plug-in error', exception=ex)
self.notify(
u'Failed to load plug-in %s (see debug window for stack trace)' \
% data[u'item-type'])
self.main_window.print_debug_window(ex)
e.accept()
self.main_window.set_busy(False)
return False
self.extension_manager.fire(u'new_item',
name=data[u'item-name'], _type=data[u'item-type'])
else:
item = self.experiment.items[data[u'item-name']]
inserted = False
# If the item has no parent or if it is the experiment starting point,
# we insert into it directly.
if target_treeitem.parent() == None or \
target_item.name == self.experiment.start:
target_item.insert_child_item(item.name)
inserted = True
else:
if target_item.item_type in (u'loop', u'sequence'):
self.main_window.set_busy(False)
# Choose appropriate option
if target_item.item_type == u'loop':
question = _('Set as item to run for %s') % target_item.name
icon = u'os-loop'
else:
question = _('Insert into %s') % target_item.name
icon = u'os-sequence'
resp = popup_menu(self, [(0, question, icon),
(1, _('Insert after %s' % target_item.name), 'list-add')
]).show()
# Confirmation
if resp == 0 and target_item.item_type == u'loop' and \
target_item.item in self.experiment.items:
resp = popup_menu(self, [(0, _(u'I know, do it!'), icon)],
title=_(u'This will replace %s' % (target_item.item))
).show()
# If the popup was cancelled
if resp == None:
e.accept()
# Delete the item if it was new or didn't originate from
# this application.
if data[u'type'] == u'item-new' \
or data[u'application-id'] != self.main_window._id():
del self.experiment.items[item.name]
self.main_window.set_busy(False)
return False
# If the user chose to insert into the target item
if resp == 0:
target_item.insert_child_item(item.name)
inserted = True
# Otherwise, we find the parent of the target item, and insert the
# new item at the correct position.
if not inserted:
while True:
try:
parent_treeitem = target_treeitem.parent()
except:
# A race condition can occur in which the tree_overview has
# been rebuild, thus destroying target_treeitem. If this
# happens, we re-take target_treeitem based on the mouse
# coordinates.
target_treeitem = self.itemAt(e.pos())
parent_treeitem = target_treeitem.parent()
if parent_treeitem == None:
e.accept()
del self.experiment.items[item.name]
self.main_window.set_busy(False)
return False
parent_item_name = unicode(parent_treeitem.text(0))
parent_item = self.experiment.items[parent_item_name]
if isinstance(parent_item, sequence):
break
target_treeitem = parent_treeitem
index = parent_treeitem.indexOfChild(target_treeitem)+1
parent_item.insert_child_item(item.name, index=index)
if e != None:
e.accept()
self.structure_change.emit()
if self.overview_mode:
item.open_tab()
self.main_window.set_busy(False)
return True
def drop_event_item_new(self, data, e=None, target_treeitem=None):
"""
desc:
Handles drop events for item creation.
arguments:
data:
desc: A drop-data dictionary.
type: dict:
keywords:
e:
desc: A drop event or None if a target treeitem is provided.
type: [QDropEvent, NoneType]
target_treeitem:
desc: A target tree item or None in a drop event is specified.
type: [tree_base_item, NoneType]
returns:
desc: True if the drop was successful, False otherwise.
type: bool
"""
self.main_window.set_busy(True)
if not drag_and_drop.matches(data,
[u'item-snippet', u'item-existing']):
if e is not None:
e.ignore()
self.main_window.set_busy(False)
return False
if data[u'type'] == u'item-existing' and \
data[u'item-name'] not in self.experiment.items:
self.experiment.notify(
_(u'Cannot create linked copy of "%s". Has '
u'the item been permanently deleted?') % data[u'item-name'])
if e is not None:
e.ignore()
self.main_window.set_busy(False)
return False
# Ignore drops on non-droppable tree items.
if target_treeitem is None:
target_treeitem = self.itemAt(e.pos())
if not self.droppable(target_treeitem, data):
if e is not None:
e.ignore()
self.main_window.set_busy(False)
return False
# Accept drops on the unused items bin and unused items (i.e. items
# in the bin)
if target_treeitem.name == u'__unused__' or \
(target_treeitem.parent() is not None and \
target_treeitem.parent().name == u'__unused__'):
e.accept()
self.structure_change.emit()
self.main_window.set_busy(False)
return True
# Get the target item, check if it exists, and, if so, drop the source
# item on it.
target_item_name = target_treeitem.text(0)
if target_item_name not in self.experiment.items:
debug.msg(u'Don\'t know how to drop on %s' % target_item_name)
if e is not None:
e.ignore()
self.structure_change.emit()
self.main_window.set_busy(False)
return False
target_item = self.experiment.items[target_item_name]
if data[u'type'] == u'item-existing':
item, new_items = self.drop_get_item_existing(data)
else:
# Creating an item may fail, and we therefore need to clean up when
# this happens. But we don't catch the Exception itself, because it
# will be handled with higher up, for example by the bug_report
# extension.
try:
item = None
item, new_items = self.drop_get_item_snippet(data)
finally:
if item is None:
if e is not None:
e.ignore()
self.structure_change.emit()
self.main_window.set_busy(False)
self.end_drag()
inserted = False
# If the item has no parent or if it is the experiment starting point,
# we insert into it directly.
if target_treeitem.parent() is None or \
target_item.name == self.experiment.var.start:
target_item.insert_child_item(item.name)
inserted = True
else:
if isinstance(target_item, qtstructure_item):
self.main_window.set_busy(False)
resp = popup_menu(self, [
(0, _('Insert into %s') % target_item.name, u'go-next'),
(1, _('Insert after %s') % target_item.name, u'go-down')
]).show()
# If the popup was cancelled
if resp is None:
if e is not None:
e.accept()
self.main_window.set_busy(False)
for item in new_items:
del self.experiment.items[item]
return False
# If the user chose to insert into the target item
if resp == 0:
target_item.insert_child_item(item.name)
inserted = True
# Otherwise, we find the parent of the target item, and insert the
# new item at the correct position.
if not inserted:
while True:
try:
parent_treeitem = target_treeitem.parent()
except:
# A race condition can occur in which the tree_overview has
# been rebuild, thus destroying target_treeitem. If this
# happens, we re-take target_treeitem based on the mouse
# coordinates.
target_treeitem = self.itemAt(e.pos())
parent_treeitem = target_treeitem.parent()
if parent_treeitem is None:
e.accept()
del self.experiment.items[item.name]
self.main_window.set_busy(False)
return False
parent_item_name = str(parent_treeitem.text(0))
parent_item = self.experiment.items[parent_item_name]
if isinstance(parent_item, sequence):
break
target_treeitem = parent_treeitem
index = parent_treeitem.indexOfChild(target_treeitem) + 1
parent_item.insert_child_item(item.name, index=index)
if e is not None:
e.accept()
self.structure_change.emit()
if self.overview_mode:
item.open_tab()
self.main_window.set_busy(False)
return True
