/usr/lib/python2.7/dist-packages/chaco/tools/move_tool.py is in python-chaco 4.5.0-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 | """ Defines the MoveTool class.
"""
# Enthought library imports
from traits.api import Tuple
from enable.tools.drag_tool import DragTool
class MoveTool(DragTool):
""" A tool for moving a plot component.
"""
# The (x,y) offset of the start of the drag relative to the component.
_offset = Tuple((0,0))
def drag_start(self, event):
""" Called when the drag operation starts.
Implements DragTool.
"""
self._offset = (event.x - self.component.x, event.y - self.component.y)
event.handled = True
def dragging(self, event):
""" This method is called for every mouse_move event that the tool
receives while the user is dragging the mouse.
Implements DragTool. Moves the component.
"""
c = self.component
c.position = [event.x - self._offset[0], event.y - self._offset[1]]
if getattr(c, "x_mapper", None):
c.x_mapper.updated = True
if getattr(c, "y_mapper", None):
c.y_mapper.updated = True
if getattr(c, "vgrid", None):
c.vgrid.invalidate()
if getattr(c, "hgrid", None):
c.hgrid.invalidate()
event.handled = True
c.request_redraw()
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