85 lines
2.4 KiB
Python
85 lines
2.4 KiB
Python
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"""
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========================
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Widget testing utilities
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========================
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Functions that are useful for testing widgets.
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See also matplotlib.tests.test_widgets
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"""
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import matplotlib.pyplot as plt
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from unittest import mock
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def get_ax():
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"""Creates plot and returns its axes"""
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fig, ax = plt.subplots(1, 1)
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ax.plot([0, 200], [0, 200])
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ax.set_aspect(1.0)
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ax.figure.canvas.draw()
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return ax
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def mock_event(ax, button=1, xdata=0, ydata=0, key=None, step=1):
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r"""
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Create a mock event that can stand in for `.Event` and its subclasses.
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This event is intended to be used in tests where it can be passed into
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event handling functions.
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Parameters
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----------
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ax : `matplotlib.axes.Axes`
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The axes the event will be in.
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xdata : int
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x coord of mouse in data coords.
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ydata : int
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y coord of mouse in data coords.
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button : None or `MouseButton` or {'up', 'down'}
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The mouse button pressed in this event (see also `.MouseEvent`).
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key : None or str
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The key pressed when the mouse event triggered (see also `.KeyEvent`).
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step : int
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Number of scroll steps (positive for 'up', negative for 'down').
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Returns
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-------
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event
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A `.Event`\-like Mock instance.
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"""
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event = mock.Mock()
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event.button = button
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event.x, event.y = ax.transData.transform([(xdata, ydata),
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(xdata, ydata)])[0]
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event.xdata, event.ydata = xdata, ydata
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event.inaxes = ax
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event.canvas = ax.figure.canvas
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event.key = key
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event.step = step
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event.guiEvent = None
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event.name = 'Custom'
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return event
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def do_event(tool, etype, button=1, xdata=0, ydata=0, key=None, step=1):
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"""
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Trigger an event on the given tool.
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Parameters
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----------
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tool : matplotlib.widgets.RectangleSelector
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etype : str
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The event to trigger.
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xdata : int
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x coord of mouse in data coords.
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ydata : int
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y coord of mouse in data coords.
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button : None or `MouseButton` or {'up', 'down'}
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The mouse button pressed in this event (see also `.MouseEvent`).
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key : None or str
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The key pressed when the mouse event triggered (see also `.KeyEvent`).
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step : int
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Number of scroll steps (positive for 'up', negative for 'down').
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"""
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event = mock_event(tool.ax, button, xdata, ydata, key, step)
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func = getattr(tool, etype)
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func(event)
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