def _create_drag_event(self, event):
# If the control no longer exists, don't send mouse event
if self.control is None:
return None
# If the event (if there is one) doesn't contain the mouse position,
# modifiers and buttons then get sensible defaults.
try:
x = event.x()
y = event.y()
except AttributeError:
pos = self.control.mapFromGlobal(QtGui.QCursor.pos())
x = pos.x()
y = pos.y()
self.control.handler.last_mouse_pos = (x, y)
# extract an object from the event, if we can
try:
mimedata = event.mimeData()
copy = event.proposedAction() == QtCore.Qt.CopyAction
except AttributeError:
# this is a DragLeave event
return DragEvent(x=x,
y=self._flip_y(y),
obj=None,
copy=False,
window=self,
mimedata=None)
try:
from traitsui.qt4.clipboard import PyMimeData
except ImportError:
# traitsui isn't available, just make mimedata available on event
obj = None
else:
mimedata = PyMimeData.coerce(mimedata)
obj = mimedata.instance()
if obj is None:
files = mimedata.localPaths()
if files:
try:
# try to extract file info from mimedata
# XXX this is for compatibility with what wx does
from apptools.io.api import File
obj = [File(path=path) for path in files]
except ImportError:
pass
return DragEvent(x=x,
y=self._flip_y(y),
obj=obj,
copy=copy,
window=self,
mimedata=mimedata)
def wx_drag_leave(self, drag_object):
drag_leave_event = DragEvent(x=0.0,
y=0.0,
x0=0.0,
y0=0.0,
copy=False,
obj=drag_object,
start_event=default_start_event,
window=self)
self.component.dispatch(drag_leave_event, "drag_leave")
return
def wx_dropped_on(self, x, y, drag_object, drop_result):
"Handle wxPython drag and drop events"
# Process the 'dropped_on' event for the object(s) it was dropped on:
y = self._flip_y(y)
drag_event = DragEvent(x=x, y=y, obj=drag_object, window=self)
self._drag_result = wx.DragNone
if self.component.is_in(x, y):
self.component.dispatch(drag_event, "dropped_on")
# If a downstream component wants to express that it handled the
return self._drag_result
def wx_drag_over(self, x, y, drag_object, drag_result):
y = self._flip_y(y)
drag_over_event = DragEvent(x=x,
y=y,
x0=0.0,
y0=0.0,
copy=drag_result != wx.DragMove,
obj=drag_object,
start_event=default_start_event,
window=self)
# By default, don't indicate that we can be dropped on. It is up
# to the component to set this correctly.
self._drag_result = wx.DragNone
if self.component.is_in(x, y):
self.component.dispatch(drag_over_event, "drag_over")
return self._drag_result
def create_drag_event(self, **kwargs):
""" Creates a DragEvent() with the specified attributes.
"""
event = DragEvent(**kwargs)
return event