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Viewing changes to examples/demo/canvas/mp_viewport_pan_tool.py

  • Committer: Package Import Robot
  • Author(s): Andrew Starr-Bochicchio
  • Date: 2014-06-01 17:04:08 UTC
  • mfrom: (7.2.5 sid)
  • Revision ID: package-import@ubuntu.com-20140601170408-m86xvdjd83a4qon0
Tags: 4.4.1-1ubuntu1
* Merge from Debian unstable. Remaining Ubuntu changes:
 - Let the binary-predeb target work on the usr/lib/python* directory
   as we don't have usr/share/pyshared anymore.

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examples/demo/canvas/mp_viewport_pan_tool.py
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from traits.api import Int, Tuple
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from enable.tools.api import ViewportPanTool
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class MPViewportPanTool(ViewportPanTool):
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    cur_bid = Int(-1)
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    _last_blob_pos = Tuple
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    def normal_blob_down(self, event):
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        if self.cur_bid == -1 and self.is_draggable(event.x, event.y):
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            self.cur_bid = event.bid
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            self.drag_start(event)
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    def dragging_blob_up(self, event):
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        if event.bid == self.cur_bid:
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            self.cur_bid = -1
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            self.drag_end(event)
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    def dragging_blob_move(self, event):
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        if event.bid == self.cur_bid:
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            self._last_blob_pos = (event.x, event.y)
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            self.dragging(event)
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    def drag_start(self, event):
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        if self.component:
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            self.original_padding = self.component.padding
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            if hasattr(event, "bid"):
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                event.window.capture_blob(self, event.bid,
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                                          event.net_transform())
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            else:
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                event.window.set_mouse_owner(self, event.net_transform())
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            self._last_blob_pos = (event.x, event.y)
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            self.mouse_down_position = (event.x,event.y)
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            self.event_state = "dragging"
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            event.handled = True
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            ViewportPanTool.drag_start(self, event)
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        return
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    def drag_end(self, event):
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        event.x, event.y = self._last_blob_pos
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        if hasattr(event, "bid"):
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            event.window.release_blob(event.bid)
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        self.event_state = "normal"
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        ViewportPanTool.drag_end(self, event)
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