555 lines
19 KiB
Python
555 lines
19 KiB
Python
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from matplotlib import transforms
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from matplotlib.offsetbox import (AnchoredOffsetbox, AuxTransformBox,
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DrawingArea, TextArea, VPacker)
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from matplotlib.patches import (Rectangle, Ellipse, ArrowStyle,
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FancyArrowPatch, PathPatch)
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from matplotlib.text import TextPath
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__all__ = ['AnchoredDrawingArea', 'AnchoredAuxTransformBox',
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'AnchoredEllipse', 'AnchoredSizeBar', 'AnchoredDirectionArrows']
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class AnchoredDrawingArea(AnchoredOffsetbox):
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def __init__(self, width, height, xdescent, ydescent,
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loc, pad=0.4, borderpad=0.5, prop=None, frameon=True,
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**kwargs):
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"""
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An anchored container with a fixed size and fillable DrawingArea.
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Artists added to the *drawing_area* will have their coordinates
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interpreted as pixels. Any transformations set on the artists will be
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overridden.
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Parameters
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----------
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width, height : float
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width and height of the container, in pixels.
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xdescent, ydescent : float
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descent of the container in the x- and y- direction, in pixels.
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loc : int
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Location of this artist. Valid location codes are::
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'upper right' : 1,
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'upper left' : 2,
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'lower left' : 3,
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'lower right' : 4,
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'right' : 5,
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'center left' : 6,
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'center right' : 7,
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'lower center' : 8,
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'upper center' : 9,
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'center' : 10
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pad : float, default: 0.4
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Padding around the child objects, in fraction of the font size.
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borderpad : float, default: 0.5
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Border padding, in fraction of the font size.
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prop : `matplotlib.font_manager.FontProperties`, optional
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Font property used as a reference for paddings.
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frameon : bool, default: True
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If True, draw a box around this artists.
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**kwargs
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Keyworded arguments to pass to
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:class:`matplotlib.offsetbox.AnchoredOffsetbox`.
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Attributes
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----------
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drawing_area : `matplotlib.offsetbox.DrawingArea`
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A container for artists to display.
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Examples
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--------
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To display blue and red circles of different sizes in the upper right
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of an axes *ax*:
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>>> ada = AnchoredDrawingArea(20, 20, 0, 0,
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... loc='upper right', frameon=False)
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>>> ada.drawing_area.add_artist(Circle((10, 10), 10, fc="b"))
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>>> ada.drawing_area.add_artist(Circle((30, 10), 5, fc="r"))
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>>> ax.add_artist(ada)
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"""
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self.da = DrawingArea(width, height, xdescent, ydescent)
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self.drawing_area = self.da
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super().__init__(
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loc, pad=pad, borderpad=borderpad, child=self.da, prop=None,
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frameon=frameon, **kwargs
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)
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class AnchoredAuxTransformBox(AnchoredOffsetbox):
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def __init__(self, transform, loc,
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pad=0.4, borderpad=0.5, prop=None, frameon=True, **kwargs):
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"""
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An anchored container with transformed coordinates.
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Artists added to the *drawing_area* are scaled according to the
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coordinates of the transformation used. The dimensions of this artist
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will scale to contain the artists added.
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Parameters
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----------
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transform : `matplotlib.transforms.Transform`
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The transformation object for the coordinate system in use, i.e.,
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:attr:`matplotlib.axes.Axes.transData`.
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loc : int
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Location of this artist. Valid location codes are::
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'upper right' : 1,
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'upper left' : 2,
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'lower left' : 3,
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'lower right' : 4,
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'right' : 5,
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'center left' : 6,
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'center right' : 7,
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'lower center' : 8,
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'upper center' : 9,
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'center' : 10
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pad : float, default: 0.4
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Padding around the child objects, in fraction of the font size.
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borderpad : float, default: 0.5
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Border padding, in fraction of the font size.
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prop : `matplotlib.font_manager.FontProperties`, optional
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Font property used as a reference for paddings.
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frameon : bool, default: True
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If True, draw a box around this artists.
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**kwargs
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Keyworded arguments to pass to
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:class:`matplotlib.offsetbox.AnchoredOffsetbox`.
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Attributes
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----------
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drawing_area : `matplotlib.offsetbox.AuxTransformBox`
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A container for artists to display.
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Examples
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--------
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To display an ellipse in the upper left, with a width of 0.1 and
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height of 0.4 in data coordinates:
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>>> box = AnchoredAuxTransformBox(ax.transData, loc='upper left')
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>>> el = Ellipse((0, 0), width=0.1, height=0.4, angle=30)
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>>> box.drawing_area.add_artist(el)
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>>> ax.add_artist(box)
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"""
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self.drawing_area = AuxTransformBox(transform)
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super().__init__(loc, pad=pad, borderpad=borderpad,
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child=self.drawing_area, prop=prop, frameon=frameon,
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**kwargs)
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class AnchoredEllipse(AnchoredOffsetbox):
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def __init__(self, transform, width, height, angle, loc,
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pad=0.1, borderpad=0.1, prop=None, frameon=True, **kwargs):
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"""
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Draw an anchored ellipse of a given size.
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Parameters
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----------
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transform : `matplotlib.transforms.Transform`
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The transformation object for the coordinate system in use, i.e.,
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:attr:`matplotlib.axes.Axes.transData`.
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width, height : float
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Width and height of the ellipse, given in coordinates of
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*transform*.
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angle : float
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Rotation of the ellipse, in degrees, anti-clockwise.
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loc : int
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Location of this size bar. Valid location codes are::
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'upper right' : 1,
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'upper left' : 2,
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'lower left' : 3,
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'lower right' : 4,
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'right' : 5,
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'center left' : 6,
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'center right' : 7,
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'lower center' : 8,
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'upper center' : 9,
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'center' : 10
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pad : float, optional
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Padding around the ellipse, in fraction of the font size. Defaults
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to 0.1.
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borderpad : float, default: 0.1
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Border padding, in fraction of the font size.
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frameon : bool, default: True
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If True, draw a box around the ellipse.
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prop : `matplotlib.font_manager.FontProperties`, optional
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Font property used as a reference for paddings.
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**kwargs
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Keyworded arguments to pass to
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:class:`matplotlib.offsetbox.AnchoredOffsetbox`.
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Attributes
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----------
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ellipse : `matplotlib.patches.Ellipse`
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Ellipse patch drawn.
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"""
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self._box = AuxTransformBox(transform)
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self.ellipse = Ellipse((0, 0), width, height, angle)
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self._box.add_artist(self.ellipse)
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super().__init__(loc, pad=pad, borderpad=borderpad, child=self._box,
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prop=prop, frameon=frameon, **kwargs)
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class AnchoredSizeBar(AnchoredOffsetbox):
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def __init__(self, transform, size, label, loc,
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pad=0.1, borderpad=0.1, sep=2,
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frameon=True, size_vertical=0, color='black',
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label_top=False, fontproperties=None, fill_bar=None,
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**kwargs):
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"""
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Draw a horizontal scale bar with a center-aligned label underneath.
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Parameters
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----------
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transform : `matplotlib.transforms.Transform`
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The transformation object for the coordinate system in use, i.e.,
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:attr:`matplotlib.axes.Axes.transData`.
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size : float
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Horizontal length of the size bar, given in coordinates of
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*transform*.
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label : str
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Label to display.
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loc : int
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Location of this size bar. Valid location codes are::
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'upper right' : 1,
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'upper left' : 2,
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'lower left' : 3,
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'lower right' : 4,
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'right' : 5,
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'center left' : 6,
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'center right' : 7,
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'lower center' : 8,
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'upper center' : 9,
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'center' : 10
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pad : float, default: 0.1
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Padding around the label and size bar, in fraction of the font
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size.
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borderpad : float, default: 0.1
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Border padding, in fraction of the font size.
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sep : float, default: 2
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Separation between the label and the size bar, in points.
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frameon : bool, default: True
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If True, draw a box around the horizontal bar and label.
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size_vertical : float, default: 0
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Vertical length of the size bar, given in coordinates of
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*transform*.
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color : str, default: 'black'
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Color for the size bar and label.
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label_top : bool, default: False
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If True, the label will be over the size bar.
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fontproperties : `matplotlib.font_manager.FontProperties`, optional
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Font properties for the label text.
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fill_bar : bool, optional
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If True and if size_vertical is nonzero, the size bar will
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be filled in with the color specified by the size bar.
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Defaults to True if *size_vertical* is greater than
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zero and False otherwise.
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**kwargs
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Keyworded arguments to pass to
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:class:`matplotlib.offsetbox.AnchoredOffsetbox`.
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Attributes
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----------
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size_bar : `matplotlib.offsetbox.AuxTransformBox`
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Container for the size bar.
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txt_label : `matplotlib.offsetbox.TextArea`
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Container for the label of the size bar.
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Notes
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-----
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If *prop* is passed as a keyworded argument, but *fontproperties* is
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not, then *prop* is be assumed to be the intended *fontproperties*.
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Using both *prop* and *fontproperties* is not supported.
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Examples
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--------
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>>> import matplotlib.pyplot as plt
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>>> import numpy as np
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>>> from mpl_toolkits.axes_grid1.anchored_artists import (
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... AnchoredSizeBar)
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>>> fig, ax = plt.subplots()
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>>> ax.imshow(np.random.random((10, 10)))
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>>> bar = AnchoredSizeBar(ax.transData, 3, '3 data units', 4)
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>>> ax.add_artist(bar)
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>>> fig.show()
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Using all the optional parameters
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>>> import matplotlib.font_manager as fm
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>>> fontprops = fm.FontProperties(size=14, family='monospace')
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>>> bar = AnchoredSizeBar(ax.transData, 3, '3 units', 4, pad=0.5,
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... sep=5, borderpad=0.5, frameon=False,
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... size_vertical=0.5, color='white',
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... fontproperties=fontprops)
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"""
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if fill_bar is None:
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fill_bar = size_vertical > 0
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self.size_bar = AuxTransformBox(transform)
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self.size_bar.add_artist(Rectangle((0, 0), size, size_vertical,
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fill=fill_bar, facecolor=color,
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edgecolor=color))
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if fontproperties is None and 'prop' in kwargs:
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fontproperties = kwargs.pop('prop')
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if fontproperties is None:
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textprops = {'color': color}
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else:
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textprops = {'color': color, 'fontproperties': fontproperties}
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self.txt_label = TextArea(label, textprops=textprops)
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if label_top:
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_box_children = [self.txt_label, self.size_bar]
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else:
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_box_children = [self.size_bar, self.txt_label]
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self._box = VPacker(children=_box_children,
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align="center",
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pad=0, sep=sep)
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super().__init__(loc, pad=pad, borderpad=borderpad, child=self._box,
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prop=fontproperties, frameon=frameon, **kwargs)
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class AnchoredDirectionArrows(AnchoredOffsetbox):
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def __init__(self, transform, label_x, label_y, length=0.15,
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fontsize=0.08, loc=2, angle=0, aspect_ratio=1, pad=0.4,
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borderpad=0.4, frameon=False, color='w', alpha=1,
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sep_x=0.01, sep_y=0, fontproperties=None, back_length=0.15,
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head_width=10, head_length=15, tail_width=2,
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text_props=None, arrow_props=None,
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**kwargs):
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"""
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Draw two perpendicular arrows to indicate directions.
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Parameters
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----------
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transform : `matplotlib.transforms.Transform`
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The transformation object for the coordinate system in use, i.e.,
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:attr:`matplotlib.axes.Axes.transAxes`.
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label_x, label_y : str
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Label text for the x and y arrows
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length : float, default: 0.15
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Length of the arrow, given in coordinates of *transform*.
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fontsize : float, default: 0.08
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Size of label strings, given in coordinates of *transform*.
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loc : int, default: 2
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Location of the direction arrows. Valid location codes are::
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'upper right' : 1,
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'upper left' : 2,
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||
|
|
'lower left' : 3,
|
||
|
|
'lower right' : 4,
|
||
|
|
'right' : 5,
|
||
|
|
'center left' : 6,
|
||
|
|
'center right' : 7,
|
||
|
|
'lower center' : 8,
|
||
|
|
'upper center' : 9,
|
||
|
|
'center' : 10
|
||
|
|
|
||
|
|
angle : float, default: 0
|
||
|
|
The angle of the arrows in degrees.
|
||
|
|
|
||
|
|
aspect_ratio : float, default: 1
|
||
|
|
The ratio of the length of arrow_x and arrow_y.
|
||
|
|
Negative numbers can be used to change the direction.
|
||
|
|
|
||
|
|
pad : float, default: 0.4
|
||
|
|
Padding around the labels and arrows, in fraction of the font size.
|
||
|
|
|
||
|
|
borderpad : float, default: 0.4
|
||
|
|
Border padding, in fraction of the font size.
|
||
|
|
|
||
|
|
frameon : bool, default: False
|
||
|
|
If True, draw a box around the arrows and labels.
|
||
|
|
|
||
|
|
color : str, default: 'white'
|
||
|
|
Color for the arrows and labels.
|
||
|
|
|
||
|
|
alpha : float, default: 1
|
||
|
|
Alpha values of the arrows and labels
|
||
|
|
|
||
|
|
sep_x, sep_y : float, default: 0.01 and 0 respectively
|
||
|
|
Separation between the arrows and labels in coordinates of
|
||
|
|
*transform*.
|
||
|
|
|
||
|
|
fontproperties : `matplotlib.font_manager.FontProperties`, optional
|
||
|
|
Font properties for the label text.
|
||
|
|
|
||
|
|
back_length : float, default: 0.15
|
||
|
|
Fraction of the arrow behind the arrow crossing.
|
||
|
|
|
||
|
|
head_width : float, default: 10
|
||
|
|
Width of arrow head, sent to ArrowStyle.
|
||
|
|
|
||
|
|
head_length : float, default: 15
|
||
|
|
Length of arrow head, sent to ArrowStyle.
|
||
|
|
|
||
|
|
tail_width : float, default: 2
|
||
|
|
Width of arrow tail, sent to ArrowStyle.
|
||
|
|
|
||
|
|
text_props, arrow_props : dict
|
||
|
|
Properties of the text and arrows, passed to
|
||
|
|
`.textpath.TextPath` and `.patches.FancyArrowPatch`.
|
||
|
|
|
||
|
|
**kwargs
|
||
|
|
Keyworded arguments to pass to
|
||
|
|
:class:`matplotlib.offsetbox.AnchoredOffsetbox`.
|
||
|
|
|
||
|
|
Attributes
|
||
|
|
----------
|
||
|
|
arrow_x, arrow_y : `matplotlib.patches.FancyArrowPatch`
|
||
|
|
Arrow x and y
|
||
|
|
|
||
|
|
text_path_x, text_path_y : `matplotlib.textpath.TextPath`
|
||
|
|
Path for arrow labels
|
||
|
|
|
||
|
|
p_x, p_y : `matplotlib.patches.PathPatch`
|
||
|
|
Patch for arrow labels
|
||
|
|
|
||
|
|
box : `matplotlib.offsetbox.AuxTransformBox`
|
||
|
|
Container for the arrows and labels.
|
||
|
|
|
||
|
|
Notes
|
||
|
|
-----
|
||
|
|
If *prop* is passed as a keyword argument, but *fontproperties* is
|
||
|
|
not, then *prop* is be assumed to be the intended *fontproperties*.
|
||
|
|
Using both *prop* and *fontproperties* is not supported.
|
||
|
|
|
||
|
|
Examples
|
||
|
|
--------
|
||
|
|
>>> import matplotlib.pyplot as plt
|
||
|
|
>>> import numpy as np
|
||
|
|
>>> from mpl_toolkits.axes_grid1.anchored_artists import (
|
||
|
|
... AnchoredDirectionArrows)
|
||
|
|
>>> fig, ax = plt.subplots()
|
||
|
|
>>> ax.imshow(np.random.random((10, 10)))
|
||
|
|
>>> arrows = AnchoredDirectionArrows(ax.transAxes, '111', '110')
|
||
|
|
>>> ax.add_artist(arrows)
|
||
|
|
>>> fig.show()
|
||
|
|
|
||
|
|
Using several of the optional parameters, creating downward pointing
|
||
|
|
arrow and high contrast text labels.
|
||
|
|
|
||
|
|
>>> import matplotlib.font_manager as fm
|
||
|
|
>>> fontprops = fm.FontProperties(family='monospace')
|
||
|
|
>>> arrows = AnchoredDirectionArrows(ax.transAxes, 'East', 'South',
|
||
|
|
... loc='lower left', color='k',
|
||
|
|
... aspect_ratio=-1, sep_x=0.02,
|
||
|
|
... sep_y=-0.01,
|
||
|
|
... text_props={'ec':'w', 'fc':'k'},
|
||
|
|
... fontproperties=fontprops)
|
||
|
|
"""
|
||
|
|
if arrow_props is None:
|
||
|
|
arrow_props = {}
|
||
|
|
|
||
|
|
if text_props is None:
|
||
|
|
text_props = {}
|
||
|
|
|
||
|
|
arrowstyle = ArrowStyle("Simple",
|
||
|
|
head_width=head_width,
|
||
|
|
head_length=head_length,
|
||
|
|
tail_width=tail_width)
|
||
|
|
|
||
|
|
if fontproperties is None and 'prop' in kwargs:
|
||
|
|
fontproperties = kwargs.pop('prop')
|
||
|
|
|
||
|
|
if 'color' not in arrow_props:
|
||
|
|
arrow_props['color'] = color
|
||
|
|
|
||
|
|
if 'alpha' not in arrow_props:
|
||
|
|
arrow_props['alpha'] = alpha
|
||
|
|
|
||
|
|
if 'color' not in text_props:
|
||
|
|
text_props['color'] = color
|
||
|
|
|
||
|
|
if 'alpha' not in text_props:
|
||
|
|
text_props['alpha'] = alpha
|
||
|
|
|
||
|
|
t_start = transform
|
||
|
|
t_end = t_start + transforms.Affine2D().rotate_deg(angle)
|
||
|
|
|
||
|
|
self.box = AuxTransformBox(t_end)
|
||
|
|
|
||
|
|
length_x = length
|
||
|
|
length_y = length*aspect_ratio
|
||
|
|
|
||
|
|
self.arrow_x = FancyArrowPatch(
|
||
|
|
(0, back_length*length_y),
|
||
|
|
(length_x, back_length*length_y),
|
||
|
|
arrowstyle=arrowstyle,
|
||
|
|
shrinkA=0.0,
|
||
|
|
shrinkB=0.0,
|
||
|
|
**arrow_props)
|
||
|
|
|
||
|
|
self.arrow_y = FancyArrowPatch(
|
||
|
|
(back_length*length_x, 0),
|
||
|
|
(back_length*length_x, length_y),
|
||
|
|
arrowstyle=arrowstyle,
|
||
|
|
shrinkA=0.0,
|
||
|
|
shrinkB=0.0,
|
||
|
|
**arrow_props)
|
||
|
|
|
||
|
|
self.box.add_artist(self.arrow_x)
|
||
|
|
self.box.add_artist(self.arrow_y)
|
||
|
|
|
||
|
|
text_path_x = TextPath((
|
||
|
|
length_x+sep_x, back_length*length_y+sep_y), label_x,
|
||
|
|
size=fontsize, prop=fontproperties)
|
||
|
|
self.p_x = PathPatch(text_path_x, transform=t_start, **text_props)
|
||
|
|
self.box.add_artist(self.p_x)
|
||
|
|
|
||
|
|
text_path_y = TextPath((
|
||
|
|
length_x*back_length+sep_x, length_y*(1-back_length)+sep_y),
|
||
|
|
label_y, size=fontsize, prop=fontproperties)
|
||
|
|
self.p_y = PathPatch(text_path_y, **text_props)
|
||
|
|
self.box.add_artist(self.p_y)
|
||
|
|
|
||
|
|
super().__init__(loc, pad=pad, borderpad=borderpad, child=self.box,
|
||
|
|
frameon=frameon, **kwargs)
|