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enthought/chaco/tools/tracking_zoom.py

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"""

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# Chaco imports

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from enthought.chaco.tools.api import SimpleZoom

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class TrackingZoom(SimpleZoom):

 

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from zoom_tool import ZoomTool

 

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class TrackingZoom(ZoomTool):

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    """ Allows the user to zoom in or out on a plot that is using tracking.

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    The **default_state** of the data range determines the tracking behavior.

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        """ Handles the mouse wheel being used when the tool is in the 'normal'

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        state.

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        Overrides SimpleZoom.

 

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        Overrides ZoomTool

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        """

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        if self.enable_wheel and event.mouse_wheel != 0:

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            if event.mouse_wheel > 0:

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