def _mouse_move(self, event):
""" Handles the mouse moving over the window.
"""
# Update tooltips if no mouse button is currently pressed:
if self._dragging is None:
feature = self._feature_at(event)
if feature is not self._tooltip_feature:
self._tooltip_feature = feature
tooltip = ''
if feature is not None:
tooltip = feature.tooltip
wx.ToolTip.Enable(False)
wx.ToolTip.Enable(True)
self.control.SetToolTip(wx.ToolTip(tooltip))
# Check to see if the mouse has left the window, and mark it
# completed if it has:
x, y = event.GetX(), event.GetY()
dx, dy = self.control.GetSizeTuple()
if (x < 0) or (y < 0) or (x >= dx) or (y >= dy):
self.control.ReleaseMouse()
self._tooltip_feature = None
self.completed = True
return
# Check to see if we are in 'drag mode' yet:
if not self._dragging:
x, y = self._xy
if (abs(x - event.GetX()) + abs(y - event.GetY())) < 3:
return
self._dragging = True
# Check to see if user is trying to drag a 'feature':
feature = self._feature
if feature is not None:
feature._set_event(event)
prefix = button = ''
if event.RightIsDown():
button = 'right_'
if event.ControlDown():
prefix = 'control_'
elif event.AltDown():
prefix = 'alt_'
elif event.ShiftDown():
prefix = 'shift_'
object = getattr(feature, '%s%sdrag' % (prefix, button))()
if object is not None:
self.control.ReleaseMouse()
self._feature = None
self.completed = True
self.dock_control.pre_drag_all(object)
PythonDropSource(self.control, object)
self.dock_control.post_drag_all()
self._dragging = None
def _element_begin_drag_changed(self, element):
""" Called when a drag is started on a element. """
# We ask the label provider for the actual value to drag.
drag_value = self.label_provider.get_drag_value(self, element)
# Start the drag.
PythonDropSource(self.control, drag_value)
return
def _mouse_move(self, event):
"""Handles the mouse being moved."""
if self._x is not None:
if (abs(self._x - event.GetX()) +
abs(self._y - event.GetY())) >= 3:
self.control.ReleaseMouse()
self._x = None
if self._is_file:
FileDropSource(self.control, self.value)
else:
PythonDropSource(self.control, self.value)
event.Skip()
def _begin_drag(self, event):
"""Handles the user beginning a drag operation with the left mouse
button.
"""
if PythonDropSource is not None:
adapter = self.adapter
object, name = self.object, self.name
index = event.GetIndex()
selected = self._get_selected()
drag_items = []
# Collect all of the selected items to drag:
for index in selected:
drag = adapter.get_drag(object, name, index)
if drag is None:
return
drag_items.append(drag)
# Save the drag item indices, so that we can later handle a
# completed 'move' operation:
self._drag_indices = selected
try:
# If only one item is being dragged, drag it as an item, not a
# list:
if len(drag_items) == 1:
drag_items = drag_items[0]
# Perform the drag and drop operation:
ds = PythonDropSource(self.control, drag_items)
# If moves are allowed and the result was a drag move:
if (ds.result == wx.DragMove) and (
self._drag_local or self.factory.drag_move
):
# Then delete all of the original items (in reverse order
# from highest to lowest, so the indices don't need to be
# adjusted):
indices = self._drag_indices
indices.reverse()
for index in indices:
adapter.delete(object, name, index)
finally:
self._drag_indices = None
self._drag_local = False
def _on_tree_begin_drag(self, event):
""" Called when a drag operation is starting on a tree item. """
# Get the node, its id and the point where the event occurred.
data, wxid, flags, point = self._unpack_event(event, event.GetItem())
if point == (0, 0):
# Apply workaround for GTK.
point = self.point_left_clicked
wxid, flags = self.HitTest(point)
data = self.control.GetItemData(wxid)
if data is not None:
populated, node = data
# Give the model a chance to veto the drag.
if self.model.is_draggable(node):
# We ask the model for the actual value to drag.
drag_value = self.model.get_drag_value(node)
# fixme: This is a terrible hack to get the binding x passed
# during a drag operation. Bindings should probably *always*
# be dragged and our drag and drop mechanism should allow
# extendable ways to extract the actual data.
from pyface.wx.drag_and_drop import clipboard
clipboard.node = [node]
# Make sure that the tree selection is updated before we start
# the drag. If we don't do this then if the first thing a
# user does is drag a tree item (i.e., without a separate click
# to select it first) then the selection appears empty.
self.selection = self._get_selection()
# Start the drag.
PythonDropSource(self.control, drag_value, self)
# Trait event notification.
self.node_begin_drag = node
else:
event.Veto()
return
