diff --git a/lib/matplotlib/tests/test_widgets.py b/lib/matplotlib/tests/test_widgets.py
index 71ebd176f0b9..9964f2e9aab6 100644
--- a/lib/matplotlib/tests/test_widgets.py
+++ b/lib/matplotlib/tests/test_widgets.py
@@ -418,6 +418,45 @@ def test_slider_valmin_valmax():
assert slider.val == slider.valmax
+def test_slider_set_limits():
+ fig, ax = plt.subplots()
+ slider = widgets.Slider(ax=ax, label='', valmin=10.0, valmax=40.0,
+ valinit=15.0)
+ slider.set_limits(vmin=10, vmax=50)
+ assert slider.valinit == 15
+ assert slider.valmax == 50
+ assert slider.valmin == 10
+
+ slider = widgets.Slider(ax=ax, label='', valmin=10.0, valmax=40.0,
+ valinit=15.0)
+ slider.set_limits(vmin=20, vmax=40)
+ assert slider.valinit == 20
+ assert slider.valmax == 40
+ assert slider.valmin == 20
+
+ slider = widgets.Slider(ax=ax, label='', valmin=10.0, valmax=40.0,
+ valinit=15.0)
+ slider.val = 20
+ slider.set_limits(vmin=30, vmax=50)
+ assert slider.val == 30
+ assert slider.valmax == 50
+ assert slider.valmin == 30
+
+ slider = widgets.Slider(ax=ax, label='', valmin=10.0, valmax=40.0,
+ valinit=15.0)
+ slider.val = 20
+ slider.set_limits(vmin=1, vmax=7)
+ assert slider.val == 7
+ assert slider.valmax == 7
+ assert slider.valmin == 1
+
+ slider = widgets.Slider(ax=ax, label='', valmin=10.0, valmax=40.0,
+ valinit=15.0)
+ slider.set_limits()
+ assert slider.valmax == 40
+ assert slider.valmin == 10
+
+
def test_slider_valstep_snapping():
fig, ax = plt.subplots()
slider = widgets.Slider(ax=ax, label='', valmin=0.0, valmax=24.0,
diff --git a/lib/matplotlib/widgets.py b/lib/matplotlib/widgets.py
index a199e45d4018..2e38e1787c77 100644
--- a/lib/matplotlib/widgets.py
+++ b/lib/matplotlib/widgets.py
@@ -306,6 +306,19 @@ def reset(self):
if self.val != self.valinit:
self.set_val(self.valinit)
+ def set_limits(self, vmin=None, vmax=None):
+ """Update the limits of the slider."""
+ if vmin is None and vmax is None:
+ return
+ if vmin is not None:
+ self.valmin = vmin
+ if vmax is not None:
+ self.valmax = vmax
+ if self.orientation == 'vertical':
+ self.ax.set_ylim((self.valmin, self.valmax))
+ else:
+ self.ax.set_xlim((self.valmin, self.valmax))
+
class Slider(SliderBase):
"""
@@ -583,6 +596,18 @@ def on_changed(self, func):
"""
return self._observers.connect('changed', lambda val: func(val))
+ def set_limits(self, vmin=None, vmax=None):
+ """Update the limits of the slider."""
+ super().set_limits(vmin=vmin, vmax=vmax)
+ self.val = self._value_in_bounds(self.val)
+ # if we reset the slider after updating the limits then we should have
+ # the proper valinit value
+ self.valinit = self._value_in_bounds(self.valinit)
+ if self.orientation == 'vertical':
+ self.hline.set_ydata(self.valinit)
+ else:
+ self.vline.set_xdata(self.valinit)
+
class RangeSlider(SliderBase):
"""
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