Merge pull request matplotlib#23913 from shabnamsadegh/legend_draggable_as_param

Add draggable as param to Legend init

Author: tacaswell

lib/matplotlib/legend.py

@@ -286,6 +286,9 @@ def _update_bbox_to_anchor(self, loc_in_canvas):
     The custom dictionary mapping instances or types to a legend
     handler. This *handler_map* updates the default handler map
     found at `matplotlib.legend.Legend.get_legend_handler_map`.
+
+draggable : bool, default: False
+    Whether the legend can be dragged with the mouse.
 """)
 
 
@@ -342,7 +345,8 @@ def __init__(
         title_fontproperties=None,  # properties for the legend title
         alignment="center",       # control the alignment within the legend box
         *,
-        ncol=1  # synonym for ncols (backward compatibility)
+        ncol=1,  # synonym for ncols (backward compatibility)
+        draggable=False  # whether the legend can be dragged with the mouse
     ):
         """
         Parameters
@@ -537,7 +541,9 @@ def val_or_rc(val, rc_name):
             title_prop_fp.set_size(title_fontsize)
 
         self.set_title(title, prop=title_prop_fp)
+
         self._draggable = None
+        self.set_draggable(state=draggable)
 
         # set the text color
 

lib/matplotlib/tests/test_legend.py

@@ -783,6 +783,14 @@ def test_get_set_draggable():
     assert not legend.get_draggable()
 
 
+@pytest.mark.parametrize('draggable', (True, False))
+def test_legend_draggable(draggable):
+    fig, ax = plt.subplots()
+    ax.plot(range(10), label='shabnams')
+    leg = ax.legend(draggable=draggable)
+    assert leg.get_draggable() is draggable
+
+
 def test_alpha_handles():
     x, n, hh = plt.hist([1, 2, 3], alpha=0.25, label='data', color='red')
     legend = plt.legend()