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727 lines
29 KiB
Python
727 lines
29 KiB
Python
5 years ago
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"""
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This module provides the routine to adjust subplot layouts so that there are
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no overlapping axes or axes decorations. All axes decorations are dealt with
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(labels, ticks, titles, ticklabels) and some dependent artists are also dealt
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with (colorbar, suptitle, legend).
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Layout is done via :meth:`~matplotlib.gridspec`, with one constraint per
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gridspec, so it is possible to have overlapping axes if the gridspecs
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overlap (i.e. using :meth:`~matplotlib.gridspec.GridSpecFromSubplotSpec`).
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Axes placed using ``figure.subplots()`` or ``figure.add_subplots()`` will
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participate in the layout. Axes manually placed via ``figure.add_axes()``
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will not.
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See Tutorial: :doc:`/tutorials/intermediate/constrainedlayout_guide`
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"""
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# Development Notes:
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# What gets a layoutbox:
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# - figure
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# - gridspec
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# - subplotspec
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# EITHER:
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# - axes + pos for the axes (i.e. the total area taken by axis and
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# the actual "position" argument that needs to be sent to
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# ax.set_position.)
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# - The axes layout box will also encompass the legend, and that is
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# how legends get included (axes legends, not figure legends)
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# - colorbars are siblings of the axes if they are single-axes
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# colorbars
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# OR:
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# - a gridspec can be inside a subplotspec.
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# - subplotspec
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# EITHER:
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# - axes...
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# OR:
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# - gridspec... with arbitrary nesting...
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# - colorbars are siblings of the subplotspecs if they are multi-axes
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# colorbars.
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# - suptitle:
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# - right now suptitles are just stacked atop everything else in figure.
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# Could imagine suptitles being gridspec suptitles, but not implemented
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#
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# Todo: AnchoredOffsetbox connected to gridspecs or axes. This would
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# be more general way to add extra-axes annotations.
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import logging
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import numpy as np
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import matplotlib.cbook as cbook
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import matplotlib._layoutbox as layoutbox
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_log = logging.getLogger(__name__)
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def _in_same_column(colnum0min, colnum0max, colnumCmin, colnumCmax):
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return (colnumCmin <= colnum0min <= colnumCmax
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or colnumCmin <= colnum0max <= colnumCmax)
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def _in_same_row(rownum0min, rownum0max, rownumCmin, rownumCmax):
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return (rownumCmin <= rownum0min <= rownumCmax
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or rownumCmin <= rownum0max <= rownumCmax)
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def _axes_all_finite_sized(fig):
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"""Return whether all axes in the figure have a finite width and height."""
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for ax in fig.axes:
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if ax._layoutbox is not None:
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newpos = ax._poslayoutbox.get_rect()
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if newpos[2] <= 0 or newpos[3] <= 0:
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return False
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return True
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######################################################
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def do_constrained_layout(fig, renderer, h_pad, w_pad,
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hspace=None, wspace=None):
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"""
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Do the constrained_layout. Called at draw time in
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``figure.constrained_layout()``
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Parameters
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----------
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fig : Figure
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is the ``figure`` instance to do the layout in.
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renderer : Renderer
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the renderer to use.
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h_pad, w_pad : float
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are in figure-normalized units, and are a padding around the axes
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elements.
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hspace, wspace : float
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are in fractions of the subplot sizes.
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"""
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# Steps:
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#
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# 1. get a list of unique gridspecs in this figure. Each gridspec will be
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# constrained separately.
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# 2. Check for gaps in the gridspecs. i.e. if not every axes slot in the
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# gridspec has been filled. If empty, add a ghost axis that is made so
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# that it cannot be seen (though visible=True). This is needed to make
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# a blank spot in the layout.
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# 3. Compare the tight_bbox of each axes to its `position`, and assume that
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# the difference is the space needed by the elements around the edge of
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# the axes (decorations) like the title, ticklabels, x-labels, etc. This
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# can include legends who overspill the axes boundaries.
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# 4. Constrain gridspec elements to line up:
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# a) if colnum0 != colnumC, the two subplotspecs are stacked next to
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# each other, with the appropriate order.
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# b) if colnum0 == colnumC, line up the left or right side of the
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# _poslayoutbox (depending if it is the min or max num that is equal).
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# c) do the same for rows...
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# 5. The above doesn't constrain relative sizes of the _poslayoutboxes
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# at all, and indeed zero-size is a solution that the solver often finds
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# more convenient than expanding the sizes. Right now the solution is to
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# compare subplotspec sizes (i.e. drowsC and drows0) and constrain the
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# larger _poslayoutbox to be larger than the ratio of the sizes. i.e. if
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# drows0 > drowsC, then ax._poslayoutbox > axc._poslayoutbox*drowsC/drows0.
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# This works fine *if* the decorations are similar between the axes.
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# If the larger subplotspec has much larger axes decorations, then the
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# constraint above is incorrect.
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#
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# We need the greater than in the above, in general, rather than an equals
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# sign. Consider the case of the left column having 2 rows, and the right
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# column having 1 row. We want the top and bottom of the _poslayoutboxes
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# to line up. So that means if there are decorations on the left column
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# axes they will be smaller than half as large as the right hand axis.
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#
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# This can break down if the decoration size for the right hand axis (the
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# margins) is very large. There must be a math way to check for this case.
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invTransFig = fig.transFigure.inverted().transform_bbox
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# list of unique gridspecs that contain child axes:
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gss = set()
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for ax in fig.axes:
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if hasattr(ax, 'get_subplotspec'):
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gs = ax.get_subplotspec().get_gridspec()
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if gs._layoutbox is not None:
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gss.add(gs)
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if len(gss) == 0:
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cbook._warn_external('There are no gridspecs with layoutboxes. '
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'Possibly did not call parent GridSpec with the'
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' figure= keyword')
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if fig._layoutbox.constrained_layout_called < 1:
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for gs in gss:
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# fill in any empty gridspec slots w/ ghost axes...
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_make_ghost_gridspec_slots(fig, gs)
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for nnn in range(2):
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# do the algorithm twice. This has to be done because decorators
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# change size after the first re-position (i.e. x/yticklabels get
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# larger/smaller). This second reposition tends to be much milder,
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# so doing twice makes things work OK.
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for ax in fig.axes:
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_log.debug(ax._layoutbox)
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if ax._layoutbox is not None:
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# make margins for each layout box based on the size of
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# the decorators.
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_make_layout_margins(ax, renderer, h_pad, w_pad)
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# do layout for suptitle.
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suptitle = fig._suptitle
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do_suptitle = (suptitle is not None and
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suptitle._layoutbox is not None and
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suptitle.get_in_layout())
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if do_suptitle:
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bbox = invTransFig(
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suptitle.get_window_extent(renderer=renderer))
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height = bbox.y1 - bbox.y0
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if np.isfinite(height):
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# reserve at top of figure include an h_pad above and below
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suptitle._layoutbox.edit_height(height + h_pad * 2)
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# OK, the above lines up ax._poslayoutbox with ax._layoutbox
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# now we need to
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# 1) arrange the subplotspecs. We do it at this level because
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# the subplotspecs are meant to contain other dependent axes
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# like colorbars or legends.
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# 2) line up the right and left side of the ax._poslayoutbox
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# that have the same subplotspec maxes.
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if fig._layoutbox.constrained_layout_called < 1:
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# arrange the subplotspecs... This is all done relative to each
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# other. Some subplotspecs contain axes, and others contain
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# gridspecs the ones that contain gridspecs are a set proportion
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# of their parent gridspec. The ones that contain axes are
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# not so constrained.
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figlb = fig._layoutbox
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for child in figlb.children:
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if child._is_gridspec_layoutbox():
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# This routine makes all the subplot spec containers
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# have the correct arrangement. It just stacks the
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# subplot layoutboxes in the correct order...
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_arrange_subplotspecs(child, hspace=hspace, wspace=wspace)
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for gs in gss:
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_align_spines(fig, gs)
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fig._layoutbox.constrained_layout_called += 1
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fig._layoutbox.update_variables()
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# check if any axes collapsed to zero. If not, don't change positions:
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if _axes_all_finite_sized(fig):
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# Now set the position of the axes...
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for ax in fig.axes:
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if ax._layoutbox is not None:
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newpos = ax._poslayoutbox.get_rect()
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# Now set the new position.
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# ax.set_position will zero out the layout for
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# this axis, allowing users to hard-code the position,
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# so this does the same w/o zeroing layout.
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ax._set_position(newpos, which='original')
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if do_suptitle:
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newpos = suptitle._layoutbox.get_rect()
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suptitle.set_y(1.0 - h_pad)
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else:
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if suptitle is not None and suptitle._layoutbox is not None:
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suptitle._layoutbox.edit_height(0)
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else:
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cbook._warn_external('constrained_layout not applied. At least '
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'one axes collapsed to zero width or height.')
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def _make_ghost_gridspec_slots(fig, gs):
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"""
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Check for unoccupied gridspec slots and make ghost axes for these
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slots... Do for each gs separately. This is a pretty big kludge
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but shouldn't have too much ill effect. The worst is that
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someone querying the figure will wonder why there are more
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axes than they thought.
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"""
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nrows, ncols = gs.get_geometry()
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hassubplotspec = np.zeros(nrows * ncols, dtype=bool)
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axs = []
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for ax in fig.axes:
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if (hasattr(ax, 'get_subplotspec')
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and ax._layoutbox is not None
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and ax.get_subplotspec().get_gridspec() == gs):
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axs += [ax]
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for ax in axs:
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ss0 = ax.get_subplotspec()
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hassubplotspec[ss0.num1:(ss0.num2 + 1)] = True
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for nn, hss in enumerate(hassubplotspec):
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if not hss:
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# this gridspec slot doesn't have an axis so we
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# make a "ghost".
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ax = fig.add_subplot(gs[nn])
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ax.set_visible(False)
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def _make_layout_margins(ax, renderer, h_pad, w_pad):
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"""
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For each axes, make a margin between the *pos* layoutbox and the
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*axes* layoutbox be a minimum size that can accommodate the
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decorations on the axis.
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"""
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fig = ax.figure
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invTransFig = fig.transFigure.inverted().transform_bbox
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pos = ax.get_position(original=True)
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tightbbox = ax.get_tightbbox(renderer=renderer)
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if tightbbox is None:
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bbox = pos
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else:
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bbox = invTransFig(tightbbox)
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# this can go wrong:
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if not (np.isfinite(bbox.width) and np.isfinite(bbox.height)):
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# just abort, this is likely a bad set of co-ordinates that
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# is transitory...
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return
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# use stored h_pad if it exists
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h_padt = ax._poslayoutbox.h_pad
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if h_padt is None:
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h_padt = h_pad
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w_padt = ax._poslayoutbox.w_pad
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if w_padt is None:
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w_padt = w_pad
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ax._poslayoutbox.edit_left_margin_min(-bbox.x0 +
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pos.x0 + w_padt)
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ax._poslayoutbox.edit_right_margin_min(bbox.x1 -
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pos.x1 + w_padt)
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ax._poslayoutbox.edit_bottom_margin_min(
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-bbox.y0 + pos.y0 + h_padt)
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ax._poslayoutbox.edit_top_margin_min(bbox.y1-pos.y1+h_padt)
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_log.debug('left %f', (-bbox.x0 + pos.x0 + w_pad))
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_log.debug('right %f', (bbox.x1 - pos.x1 + w_pad))
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_log.debug('bottom %f', (-bbox.y0 + pos.y0 + h_padt))
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_log.debug('bbox.y0 %f', bbox.y0)
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_log.debug('pos.y0 %f', pos.y0)
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# Sometimes its possible for the solver to collapse
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# rather than expand axes, so they all have zero height
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# or width. This stops that... It *should* have been
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# taken into account w/ pref_width...
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if fig._layoutbox.constrained_layout_called < 1:
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ax._poslayoutbox.constrain_height_min(20, strength='weak')
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ax._poslayoutbox.constrain_width_min(20, strength='weak')
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ax._layoutbox.constrain_height_min(20, strength='weak')
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ax._layoutbox.constrain_width_min(20, strength='weak')
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ax._poslayoutbox.constrain_top_margin(0, strength='weak')
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ax._poslayoutbox.constrain_bottom_margin(0,
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strength='weak')
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ax._poslayoutbox.constrain_right_margin(0, strength='weak')
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ax._poslayoutbox.constrain_left_margin(0, strength='weak')
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def _align_spines(fig, gs):
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"""
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- Align right/left and bottom/top spines of appropriate subplots.
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- Compare size of subplotspec including height and width ratios
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and make sure that the axes spines are at least as large
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as they should be.
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"""
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# for each gridspec...
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nrows, ncols = gs.get_geometry()
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width_ratios = gs.get_width_ratios()
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height_ratios = gs.get_height_ratios()
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if width_ratios is None:
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width_ratios = np.ones(ncols)
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if height_ratios is None:
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height_ratios = np.ones(nrows)
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# get axes in this gridspec....
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axs = []
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for ax in fig.axes:
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if (hasattr(ax, 'get_subplotspec')
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and ax._layoutbox is not None):
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if ax.get_subplotspec().get_gridspec() == gs:
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axs += [ax]
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rownummin = np.zeros(len(axs), dtype=np.int8)
|
||
|
|
rownummax = np.zeros(len(axs), dtype=np.int8)
|
||
|
|
colnummin = np.zeros(len(axs), dtype=np.int8)
|
||
|
|
colnummax = np.zeros(len(axs), dtype=np.int8)
|
||
|
|
width = np.zeros(len(axs))
|
||
|
|
height = np.zeros(len(axs))
|
||
|
|
|
||
|
|
for n, ax in enumerate(axs):
|
||
|
|
ss0 = ax.get_subplotspec()
|
||
|
|
rownummin[n], colnummin[n] = divmod(ss0.num1, ncols)
|
||
|
|
rownummax[n], colnummax[n] = divmod(ss0.num2, ncols)
|
||
|
|
width[n] = np.sum(
|
||
|
|
width_ratios[colnummin[n]:(colnummax[n] + 1)])
|
||
|
|
height[n] = np.sum(
|
||
|
|
height_ratios[rownummin[n]:(rownummax[n] + 1)])
|
||
|
|
|
||
|
|
for nn, ax in enumerate(axs[:-1]):
|
||
|
|
# now compare ax to all the axs:
|
||
|
|
#
|
||
|
|
# If the subplotspecs have the same colnumXmax, then line
|
||
|
|
# up their right sides. If they have the same min, then
|
||
|
|
# line up their left sides (and vertical equivalents).
|
||
|
|
rownum0min, colnum0min = rownummin[nn], colnummin[nn]
|
||
|
|
rownum0max, colnum0max = rownummax[nn], colnummax[nn]
|
||
|
|
width0, height0 = width[nn], height[nn]
|
||
|
|
alignleft = False
|
||
|
|
alignright = False
|
||
|
|
alignbot = False
|
||
|
|
aligntop = False
|
||
|
|
alignheight = False
|
||
|
|
alignwidth = False
|
||
|
|
for mm in range(nn+1, len(axs)):
|
||
|
|
axc = axs[mm]
|
||
|
|
rownumCmin, colnumCmin = rownummin[mm], colnummin[mm]
|
||
|
|
rownumCmax, colnumCmax = rownummax[mm], colnummax[mm]
|
||
|
|
widthC, heightC = width[mm], height[mm]
|
||
|
|
# Horizontally align axes spines if they have the
|
||
|
|
# same min or max:
|
||
|
|
if not alignleft and colnum0min == colnumCmin:
|
||
|
|
# we want the _poslayoutboxes to line up on left
|
||
|
|
# side of the axes spines...
|
||
|
|
layoutbox.align([ax._poslayoutbox,
|
||
|
|
axc._poslayoutbox],
|
||
|
|
'left')
|
||
|
|
alignleft = True
|
||
|
|
|
||
|
|
if not alignright and colnum0max == colnumCmax:
|
||
|
|
# line up right sides of _poslayoutbox
|
||
|
|
layoutbox.align([ax._poslayoutbox,
|
||
|
|
axc._poslayoutbox],
|
||
|
|
'right')
|
||
|
|
alignright = True
|
||
|
|
# Vertically align axes spines if they have the
|
||
|
|
# same min or max:
|
||
|
|
if not aligntop and rownum0min == rownumCmin:
|
||
|
|
# line up top of _poslayoutbox
|
||
|
|
_log.debug('rownum0min == rownumCmin')
|
||
|
|
layoutbox.align([ax._poslayoutbox, axc._poslayoutbox],
|
||
|
|
'top')
|
||
|
|
aligntop = True
|
||
|
|
|
||
|
|
if not alignbot and rownum0max == rownumCmax:
|
||
|
|
# line up bottom of _poslayoutbox
|
||
|
|
_log.debug('rownum0max == rownumCmax')
|
||
|
|
layoutbox.align([ax._poslayoutbox, axc._poslayoutbox],
|
||
|
|
'bottom')
|
||
|
|
alignbot = True
|
||
|
|
###########
|
||
|
|
# Now we make the widths and heights of position boxes
|
||
|
|
# similar. (i.e the spine locations)
|
||
|
|
# This allows vertically stacked subplots to have
|
||
|
|
# different sizes if they occupy different amounts
|
||
|
|
# of the gridspec: i.e.
|
||
|
|
# gs = gridspec.GridSpec(3, 1)
|
||
|
|
# ax1 = gs[0,:]
|
||
|
|
# ax2 = gs[1:,:]
|
||
|
|
# then drows0 = 1, and drowsC = 2, and ax2
|
||
|
|
# should be at least twice as large as ax1.
|
||
|
|
# But it can be more than twice as large because
|
||
|
|
# it needs less room for the labeling.
|
||
|
|
#
|
||
|
|
# For height, this only needs to be done if the
|
||
|
|
# subplots share a column. For width if they
|
||
|
|
# share a row.
|
||
|
|
|
||
|
|
drowsC = (rownumCmax - rownumCmin + 1)
|
||
|
|
drows0 = (rownum0max - rownum0min + 1)
|
||
|
|
dcolsC = (colnumCmax - colnumCmin + 1)
|
||
|
|
dcols0 = (colnum0max - colnum0min + 1)
|
||
|
|
|
||
|
|
if not alignheight and drows0 == drowsC:
|
||
|
|
ax._poslayoutbox.constrain_height(
|
||
|
|
axc._poslayoutbox.height * height0 / heightC)
|
||
|
|
alignheight = True
|
||
|
|
elif _in_same_column(colnum0min, colnum0max,
|
||
|
|
colnumCmin, colnumCmax):
|
||
|
|
if height0 > heightC:
|
||
|
|
ax._poslayoutbox.constrain_height_min(
|
||
|
|
axc._poslayoutbox.height * height0 / heightC)
|
||
|
|
# these constraints stop the smaller axes from
|
||
|
|
# being allowed to go to zero height...
|
||
|
|
axc._poslayoutbox.constrain_height_min(
|
||
|
|
ax._poslayoutbox.height * heightC /
|
||
|
|
(height0*1.8))
|
||
|
|
elif height0 < heightC:
|
||
|
|
axc._poslayoutbox.constrain_height_min(
|
||
|
|
ax._poslayoutbox.height * heightC / height0)
|
||
|
|
ax._poslayoutbox.constrain_height_min(
|
||
|
|
ax._poslayoutbox.height * height0 /
|
||
|
|
(heightC*1.8))
|
||
|
|
# widths...
|
||
|
|
if not alignwidth and dcols0 == dcolsC:
|
||
|
|
ax._poslayoutbox.constrain_width(
|
||
|
|
axc._poslayoutbox.width * width0 / widthC)
|
||
|
|
alignwidth = True
|
||
|
|
elif _in_same_row(rownum0min, rownum0max,
|
||
|
|
rownumCmin, rownumCmax):
|
||
|
|
if width0 > widthC:
|
||
|
|
ax._poslayoutbox.constrain_width_min(
|
||
|
|
axc._poslayoutbox.width * width0 / widthC)
|
||
|
|
axc._poslayoutbox.constrain_width_min(
|
||
|
|
ax._poslayoutbox.width * widthC /
|
||
|
|
(width0*1.8))
|
||
|
|
elif width0 < widthC:
|
||
|
|
axc._poslayoutbox.constrain_width_min(
|
||
|
|
ax._poslayoutbox.width * widthC / width0)
|
||
|
|
ax._poslayoutbox.constrain_width_min(
|
||
|
|
axc._poslayoutbox.width * width0 /
|
||
|
|
(widthC*1.8))
|
||
|
|
|
||
|
|
|
||
|
|
def _arrange_subplotspecs(gs, hspace=0, wspace=0):
|
||
|
|
"""Recursively arrange the subplotspec children of the given gridspec."""
|
||
|
|
sschildren = []
|
||
|
|
for child in gs.children:
|
||
|
|
if child._is_subplotspec_layoutbox():
|
||
|
|
for child2 in child.children:
|
||
|
|
# check for gridspec children...
|
||
|
|
if child2._is_gridspec_layoutbox():
|
||
|
|
_arrange_subplotspecs(child2, hspace=hspace, wspace=wspace)
|
||
|
|
sschildren += [child]
|
||
|
|
# now arrange the subplots...
|
||
|
|
for child0 in sschildren:
|
||
|
|
ss0 = child0.artist
|
||
|
|
nrows, ncols = ss0.get_gridspec().get_geometry()
|
||
|
|
rowNum0min, colNum0min = divmod(ss0.num1, ncols)
|
||
|
|
rowNum0max, colNum0max = divmod(ss0.num2, ncols)
|
||
|
|
sschildren = sschildren[1:]
|
||
|
|
for childc in sschildren:
|
||
|
|
ssc = childc.artist
|
||
|
|
rowNumCmin, colNumCmin = divmod(ssc.num1, ncols)
|
||
|
|
rowNumCmax, colNumCmax = divmod(ssc.num2, ncols)
|
||
|
|
# OK, this tells us the relative layout of ax
|
||
|
|
# with axc
|
||
|
|
thepad = wspace / ncols
|
||
|
|
if colNum0max < colNumCmin:
|
||
|
|
layoutbox.hstack([ss0._layoutbox, ssc._layoutbox],
|
||
|
|
padding=thepad)
|
||
|
|
if colNumCmax < colNum0min:
|
||
|
|
layoutbox.hstack([ssc._layoutbox, ss0._layoutbox],
|
||
|
|
padding=thepad)
|
||
|
|
|
||
|
|
####
|
||
|
|
# vertical alignment
|
||
|
|
thepad = hspace / nrows
|
||
|
|
if rowNum0max < rowNumCmin:
|
||
|
|
layoutbox.vstack([ss0._layoutbox,
|
||
|
|
ssc._layoutbox],
|
||
|
|
padding=thepad)
|
||
|
|
if rowNumCmax < rowNum0min:
|
||
|
|
layoutbox.vstack([ssc._layoutbox,
|
||
|
|
ss0._layoutbox],
|
||
|
|
padding=thepad)
|
||
|
|
|
||
|
|
|
||
|
|
def layoutcolorbarsingle(ax, cax, shrink, aspect, location, pad=0.05):
|
||
|
|
"""
|
||
|
|
Do the layout for a colorbar, to not overly pollute colorbar.py
|
||
|
|
|
||
|
|
*pad* is in fraction of the original axis size.
|
||
|
|
"""
|
||
|
|
axlb = ax._layoutbox
|
||
|
|
axpos = ax._poslayoutbox
|
||
|
|
axsslb = ax.get_subplotspec()._layoutbox
|
||
|
|
lb = layoutbox.LayoutBox(
|
||
|
|
parent=axsslb,
|
||
|
|
name=axsslb.name + '.cbar',
|
||
|
|
artist=cax)
|
||
|
|
|
||
|
|
if location in ('left', 'right'):
|
||
|
|
lbpos = layoutbox.LayoutBox(
|
||
|
|
parent=lb,
|
||
|
|
name=lb.name + '.pos',
|
||
|
|
tightwidth=False,
|
||
|
|
pos=True,
|
||
|
|
subplot=False,
|
||
|
|
artist=cax)
|
||
|
|
|
||
|
|
if location == 'right':
|
||
|
|
# arrange to right of parent axis
|
||
|
|
layoutbox.hstack([axlb, lb], padding=pad * axlb.width,
|
||
|
|
strength='strong')
|
||
|
|
else:
|
||
|
|
layoutbox.hstack([lb, axlb], padding=pad * axlb.width)
|
||
|
|
# constrain the height and center...
|
||
|
|
layoutbox.match_heights([axpos, lbpos], [1, shrink])
|
||
|
|
layoutbox.align([axpos, lbpos], 'v_center')
|
||
|
|
# set the width of the pos box
|
||
|
|
lbpos.constrain_width(shrink * axpos.height * (1/aspect),
|
||
|
|
strength='strong')
|
||
|
|
elif location in ('bottom', 'top'):
|
||
|
|
lbpos = layoutbox.LayoutBox(
|
||
|
|
parent=lb,
|
||
|
|
name=lb.name + '.pos',
|
||
|
|
tightheight=True,
|
||
|
|
pos=True,
|
||
|
|
subplot=False,
|
||
|
|
artist=cax)
|
||
|
|
|
||
|
|
if location == 'bottom':
|
||
|
|
layoutbox.vstack([axlb, lb], padding=pad * axlb.height)
|
||
|
|
else:
|
||
|
|
layoutbox.vstack([lb, axlb], padding=pad * axlb.height)
|
||
|
|
# constrain the height and center...
|
||
|
|
layoutbox.match_widths([axpos, lbpos],
|
||
|
|
[1, shrink], strength='strong')
|
||
|
|
layoutbox.align([axpos, lbpos], 'h_center')
|
||
|
|
# set the height of the pos box
|
||
|
|
lbpos.constrain_height(axpos.width * aspect * shrink,
|
||
|
|
strength='medium')
|
||
|
|
|
||
|
|
return lb, lbpos
|
||
|
|
|
||
|
|
|
||
|
|
def _getmaxminrowcolumn(axs):
|
||
|
|
# helper to get the min/max rows and columns of a list of axes.
|
||
|
|
maxrow = -100000
|
||
|
|
minrow = 1000000
|
||
|
|
maxax = None
|
||
|
|
minax = None
|
||
|
|
maxcol = -100000
|
||
|
|
mincol = 1000000
|
||
|
|
maxax_col = None
|
||
|
|
minax_col = None
|
||
|
|
|
||
|
|
for ax in axs:
|
||
|
|
subspec = ax.get_subplotspec()
|
||
|
|
nrows, ncols, row_start, row_stop, col_start, col_stop = \
|
||
|
|
subspec.get_rows_columns()
|
||
|
|
if row_stop > maxrow:
|
||
|
|
maxrow = row_stop
|
||
|
|
maxax = ax
|
||
|
|
if row_start < minrow:
|
||
|
|
minrow = row_start
|
||
|
|
minax = ax
|
||
|
|
if col_stop > maxcol:
|
||
|
|
maxcol = col_stop
|
||
|
|
maxax_col = ax
|
||
|
|
if col_start < mincol:
|
||
|
|
mincol = col_start
|
||
|
|
minax_col = ax
|
||
|
|
return (minrow, maxrow, minax, maxax, mincol, maxcol, minax_col, maxax_col)
|
||
|
|
|
||
|
|
|
||
|
|
def layoutcolorbargridspec(parents, cax, shrink, aspect, location, pad=0.05):
|
||
|
|
"""
|
||
|
|
Do the layout for a colorbar, to not overly pollute colorbar.py
|
||
|
|
|
||
|
|
*pad* is in fraction of the original axis size.
|
||
|
|
"""
|
||
|
|
|
||
|
|
gs = parents[0].get_subplotspec().get_gridspec()
|
||
|
|
# parent layout box....
|
||
|
|
gslb = gs._layoutbox
|
||
|
|
|
||
|
|
lb = layoutbox.LayoutBox(parent=gslb.parent,
|
||
|
|
name=gslb.parent.name + '.cbar',
|
||
|
|
artist=cax)
|
||
|
|
# figure out the row and column extent of the parents.
|
||
|
|
(minrow, maxrow, minax_row, maxax_row,
|
||
|
|
mincol, maxcol, minax_col, maxax_col) = _getmaxminrowcolumn(parents)
|
||
|
|
|
||
|
|
if location in ('left', 'right'):
|
||
|
|
lbpos = layoutbox.LayoutBox(
|
||
|
|
parent=lb,
|
||
|
|
name=lb.name + '.pos',
|
||
|
|
tightwidth=False,
|
||
|
|
pos=True,
|
||
|
|
subplot=False,
|
||
|
|
artist=cax)
|
||
|
|
for ax in parents:
|
||
|
|
if location == 'right':
|
||
|
|
order = [ax._layoutbox, lb]
|
||
|
|
else:
|
||
|
|
order = [lb, ax._layoutbox]
|
||
|
|
layoutbox.hstack(order, padding=pad * gslb.width,
|
||
|
|
strength='strong')
|
||
|
|
# constrain the height and center...
|
||
|
|
# This isn't quite right. We'd like the colorbar
|
||
|
|
# pos to line up w/ the axes poss, not the size of the
|
||
|
|
# gs.
|
||
|
|
|
||
|
|
# Horizontal Layout: need to check all the axes in this gridspec
|
||
|
|
for ch in gslb.children:
|
||
|
|
subspec = ch.artist
|
||
|
|
nrows, ncols, row_start, row_stop, col_start, col_stop = \
|
||
|
|
subspec.get_rows_columns()
|
||
|
|
if location == 'right':
|
||
|
|
if col_stop <= maxcol:
|
||
|
|
order = [subspec._layoutbox, lb]
|
||
|
|
# arrange to right of the parents
|
||
|
|
if col_start > maxcol:
|
||
|
|
order = [lb, subspec._layoutbox]
|
||
|
|
elif location == 'left':
|
||
|
|
if col_start >= mincol:
|
||
|
|
order = [lb, subspec._layoutbox]
|
||
|
|
if col_stop < mincol:
|
||
|
|
order = [subspec._layoutbox, lb]
|
||
|
|
layoutbox.hstack(order, padding=pad * gslb.width,
|
||
|
|
strength='strong')
|
||
|
|
|
||
|
|
# Vertical layout:
|
||
|
|
maxposlb = minax_row._poslayoutbox
|
||
|
|
minposlb = maxax_row._poslayoutbox
|
||
|
|
# now we want the height of the colorbar pos to be
|
||
|
|
# set by the top and bottom of the min/max axes...
|
||
|
|
# bottom top
|
||
|
|
# b t
|
||
|
|
# h = (top-bottom)*shrink
|
||
|
|
# b = bottom + (top-bottom - h) / 2.
|
||
|
|
lbpos.constrain_height(
|
||
|
|
(maxposlb.top - minposlb.bottom) *
|
||
|
|
shrink, strength='strong')
|
||
|
|
lbpos.constrain_bottom(
|
||
|
|
(maxposlb.top - minposlb.bottom) *
|
||
|
|
(1 - shrink)/2 + minposlb.bottom,
|
||
|
|
strength='strong')
|
||
|
|
|
||
|
|
# set the width of the pos box
|
||
|
|
lbpos.constrain_width(lbpos.height * (shrink / aspect),
|
||
|
|
strength='strong')
|
||
|
|
elif location in ('bottom', 'top'):
|
||
|
|
lbpos = layoutbox.LayoutBox(
|
||
|
|
parent=lb,
|
||
|
|
name=lb.name + '.pos',
|
||
|
|
tightheight=True,
|
||
|
|
pos=True,
|
||
|
|
subplot=False,
|
||
|
|
artist=cax)
|
||
|
|
|
||
|
|
for ax in parents:
|
||
|
|
if location == 'bottom':
|
||
|
|
order = [ax._layoutbox, lb]
|
||
|
|
else:
|
||
|
|
order = [lb, ax._layoutbox]
|
||
|
|
layoutbox.vstack(order, padding=pad * gslb.width,
|
||
|
|
strength='strong')
|
||
|
|
|
||
|
|
# Vertical Layout: need to check all the axes in this gridspec
|
||
|
|
for ch in gslb.children:
|
||
|
|
subspec = ch.artist
|
||
|
|
nrows, ncols, row_start, row_stop, col_start, col_stop = \
|
||
|
|
subspec.get_rows_columns()
|
||
|
|
if location == 'bottom':
|
||
|
|
if row_stop <= minrow:
|
||
|
|
order = [subspec._layoutbox, lb]
|
||
|
|
if row_start > maxrow:
|
||
|
|
order = [lb, subspec._layoutbox]
|
||
|
|
elif location == 'top':
|
||
|
|
if row_stop < minrow:
|
||
|
|
order = [subspec._layoutbox, lb]
|
||
|
|
if row_start >= maxrow:
|
||
|
|
order = [lb, subspec._layoutbox]
|
||
|
|
layoutbox.vstack(order, padding=pad * gslb.width,
|
||
|
|
strength='strong')
|
||
|
|
|
||
|
|
# Do horizontal layout...
|
||
|
|
maxposlb = maxax_col._poslayoutbox
|
||
|
|
minposlb = minax_col._poslayoutbox
|
||
|
|
lbpos.constrain_width((maxposlb.right - minposlb.left) *
|
||
|
|
shrink)
|
||
|
|
lbpos.constrain_left(
|
||
|
|
(maxposlb.right - minposlb.left) *
|
||
|
|
(1-shrink)/2 + minposlb.left)
|
||
|
|
# set the height of the pos box
|
||
|
|
lbpos.constrain_height(lbpos.width * shrink * aspect,
|
||
|
|
strength='medium')
|
||
|
|
|
||
|
|
return lb, lbpos
|