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Add finer-grain control to Axes.ignore_existing_data_limits#18771

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l-johnston wants to merge1 commit intomatplotlib:masterfroml-johnston:issue_7742
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4 changes: 4 additions & 0 deletionslib/matplotlib/axes/_axes.py
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Original file line numberDiff line numberDiff line change
Expand Up@@ -715,6 +715,7 @@ def axhline(self, y=0, xmin=0, xmax=1, **kwargs):
trans = self.get_yaxis_transform(which='grid')
l = mlines.Line2D([xmin, xmax], [y, y], transform=trans, **kwargs)
self.add_line(l)
self.ignore_existing_data_limits = "x"
self._request_autoscale_view(scalex=False, scaley=scaley)
return l

Expand DownExpand Up@@ -782,6 +783,7 @@ def axvline(self, x=0, ymin=0, ymax=1, **kwargs):
trans = self.get_xaxis_transform(which='grid')
l = mlines.Line2D([x, x], [ymin, ymax], transform=trans, **kwargs)
self.add_line(l)
self.ignore_existing_data_limits = "y"
self._request_autoscale_view(scalex=scalex, scaley=False)
return l

Expand DownExpand Up@@ -921,6 +923,7 @@ def axhspan(self, ymin, ymax, xmin=0, xmax=1, **kwargs):
p = mpatches.Polygon(verts, **kwargs)
p.set_transform(self.get_yaxis_transform(which="grid"))
self.add_patch(p)
self.ignore_existing_data_limits = "x"
self._request_autoscale_view(scalex=False)
return p

Expand DownExpand Up@@ -976,6 +979,7 @@ def axvspan(self, xmin, xmax, ymin=0, ymax=1, **kwargs):
p = mpatches.Polygon(verts, **kwargs)
p.set_transform(self.get_xaxis_transform(which="grid"))
self.add_patch(p)
self.ignore_existing_data_limits = "y"
self._request_autoscale_view(scaley=False)
return p

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19 changes: 19 additions & 0 deletionslib/matplotlib/axes/_base.py
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Original file line numberDiff line numberDiff line change
Expand Up@@ -546,6 +546,7 @@ def __init__(self, fig, rect,
self.set_axisbelow(mpl.rcParams['axes.axisbelow'])

self._rasterization_zorder = None
self._ignore_existing_data_limits = 1
self.cla()

# funcs used to format x and y - fall back on major formatters
Expand DownExpand Up@@ -640,6 +641,24 @@ def __repr__(self):
fields += [f"ylabel={self.get_ylabel()!r}"]
return f"<{self.__class__.__name__}:" + ", ".join(fields) + ">"

@property
def ignore_existing_data_limits(self):
"""
Whether to ignore existing data limits

value : int, bool or str
- when ``0`` or ``False``, do not ignore either x or y limits
- when ``1`` or ``True``, ignore both x and y limits
- when ``2`` or ``x``, ignore x-limits
- when ``3`` or ``y``, ignore y-limits
"""
return self._ignore_existing_data_limits

@ignore_existing_data_limits.setter
def ignore_existing_data_limits(self, value):
lu = {False: 0, True: 1, 2: 2, "x": 2, 3: 3, "y": 3}
self._ignore_existing_data_limits = lu[value]

def get_window_extent(self, *args, **kwargs):
"""
Return the axes bounding box in display space; *args* and *kwargs*
Expand Down
43 changes: 43 additions & 0 deletionslib/matplotlib/tests/test_axes.py
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Original file line numberDiff line numberDiff line change
Expand Up@@ -6814,3 +6814,46 @@ def test_ylabel_ha_with_position(ha):
ax.set_ylabel("test", y=1, ha=ha)
ax.yaxis.set_label_position("right")
assert ax.yaxis.get_label().get_ha() == ha


def test_axhline_with_date_xaxis():
fig, ax = plt.subplots()
ax.axhline(1.5)
x = [datetime.datetime(2020, 1, i) for i in range(1, 3)]
y = [1, 2]
ax.plot(x, y)
assert ax.get_xlim() == (18262.0, 18263.0)


def test_axvline_with_date_yaxis():
fig, ax = plt.subplots()
ax.axvline(1.5)
x = [1, 2]
y = [datetime.datetime(2020, 1, i) for i in range(1, 3)]
ax.plot(x, y)
assert ax.get_ylim() == (18262.0, 18263.0)


def test_two_spans():
fig, ax = plt.subplots()
ax.axhline(1)
ax.axhline(2)
assert ax.get_ylim() == (1.0, 2.0)


def test_axhspan_with_date_xaxis():
fig, ax = plt.subplots()
ax.axhspan(1, 2)
x = [datetime.datetime(2020, 1, i) for i in range(1, 3)]
y = [1, 2]
ax.plot(x, y)
assert ax.get_xlim() == (18262.0, 18263.0)


def test_axvspan_with_date_yaxis():
fig, ax = plt.subplots()
ax.axvspan(1, 2)
x = [1, 2]
y = [datetime.datetime(2020, 1, i) for i in range(1, 3)]
ax.plot(x, y)
assert ax.get_ylim() == (18262.0, 18263.0)
77 changes: 64 additions & 13 deletionssrc/_path_wrapper.cpp
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Original file line numberDiff line numberDiff line change
Expand Up@@ -208,25 +208,76 @@ static PyObject *Py_update_path_extents(PyObject *self, PyObject *args, PyObject

extent_limits e;

if (ignore) {
CALL_CPP("update_path_extents", reset_limits(e));
} else {
if (rect.x1 > rect.x2) {
switch(ignore) {
case 0: {
if (rect.x1 > rect.x2) {
e.x0 = std::numeric_limits<double>::infinity();
e.x1 = -std::numeric_limits<double>::infinity();
} else {
e.x0 = rect.x1;
e.x1 = rect.x2;
}
if (rect.y1 > rect.y2) {
e.y0 = std::numeric_limits<double>::infinity();
e.y1 = -std::numeric_limits<double>::infinity();
} else {
e.y0 = rect.y1;
e.y1 = rect.y2;
}
e.xm = minpos(0);
e.ym = minpos(1);
break;
}
case 1: {
CALL_CPP("update_path_extents", reset_limits(e));
break;
}
case 2: {
e.x0 = std::numeric_limits<double>::infinity();
e.x1 = -std::numeric_limits<double>::infinity();
} else {
e.x0 = rect.x1;
e.x1 = rect.x2;
if (rect.y1 > rect.y2) {
e.y0 = std::numeric_limits<double>::infinity();
e.y1 = -std::numeric_limits<double>::infinity();
} else {
e.y0 = rect.y1;
e.y1 = rect.y2;
}
e.xm = std::numeric_limits<double>::infinity();
e.ym = minpos(1);
break;
}
if (rect.y1 > rect.y2) {
case 3: {
if (rect.x1 > rect.x2) {
e.x0 = std::numeric_limits<double>::infinity();
e.x1 = -std::numeric_limits<double>::infinity();
} else {
e.x0 = rect.x1;
e.x1 = rect.x2;
}
e.y0 = std::numeric_limits<double>::infinity();
e.y1 = -std::numeric_limits<double>::infinity();
} else {
e.y0 = rect.y1;
e.y1 = rect.y2;
e.xm = minpos(0);
e.ym = std::numeric_limits<double>::infinity();
break;
}
default: {
if (rect.x1 > rect.x2) {
e.x0 = std::numeric_limits<double>::infinity();
e.x1 = -std::numeric_limits<double>::infinity();
} else {
e.x0 = rect.x1;
e.x1 = rect.x2;
}
if (rect.y1 > rect.y2) {
e.y0 = std::numeric_limits<double>::infinity();
e.y1 = -std::numeric_limits<double>::infinity();
} else {
e.y0 = rect.y1;
e.y1 = rect.y2;
}
e.xm = minpos(0);
e.ym = minpos(1);
}
e.xm = minpos(0);
e.ym = minpos(1);
}

CALL_CPP("update_path_extents", (update_path_extents(path, trans, e)));
Expand Down
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