def _motion_notify_cb(self, widget, event):
x, y = event.x, event.y
i = self.get_index_at_pos(x, y)
# Set the tooltip.
# Passing the tooltip through a value of None is necessary for its
# position on the screen to be updated to where the pointer is. Setting
# it to None, and then to the desired value must happen in two separate
# events for the tooltip window position update to be honoured.
if i is None:
# Not over a color, so use the static default
if self._tooltip_index not in (-1, -2):
# First such event: reset the tooltip.
self._tooltip_index = -1
self.set_has_tooltip(False)
self.set_tooltip_text("")
elif self._tooltip_index != -2:
# Second event over a non-color: set the tooltip text.
self._tooltip_index = -2
self.set_has_tooltip(True)
self.set_tooltip_text(self.STATIC_TOOLTIP_TEXT)
elif self._tooltip_index != i:
# Mouse pointer has moved to a different color, or away
# from the two states above.
if self._tooltip_index is not None:
# First event for this i: reset the tooltip.
self._tooltip_index = None
self.set_has_tooltip(False)
self.set_tooltip_text("")
else:
# Second event for this i: set the desired tooltip text.
self._tooltip_index = i
mgr = self.get_color_manager()
tip = mgr.palette.get_color_name(i)
color = mgr.palette.get_color(i)
if color is None:
tip = C_(
"palette view",
"Empty palette slot (drag a color here)",
)
elif tip is None or tip.strip() == "":
tip = "" # Anonymous colors don't get tooltips
self.set_has_tooltip(True)
self.set_tooltip_text(tip)
