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Commitbbf32b8

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committed
Allow Selectors to be dragged from anywhere within their patch
1 parent906cae4 commitbbf32b8

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3 files changed

+66
-7
lines changed

3 files changed

+66
-7
lines changed
Lines changed: 9 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,9 @@
1+
Dragging selectors
2+
------------------
3+
4+
The `~matplotlib.widgets.RectangleSelector` and
5+
`~matplotlib.widgets.EllipseSelector` have a new keyword argument,
6+
``drag_from_anywhere``, which when set to `True` allows you to click and drag
7+
from anywhere inside the selector to move it. Previously it was only possible
8+
to move it by either activating the move modifier button, or clicking on the
9+
central handle.

‎lib/matplotlib/tests/test_widgets.py

Lines changed: 30 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -44,6 +44,36 @@ def test_rectangle_selector():
4444
check_rectangle(rectprops=dict(fill=True))
4545

4646

47+
@pytest.mark.parametrize('drag_from_anywhere, new_center',
48+
[[True, (100,100)],
49+
[False, (50,50)]])
50+
deftest_rectangle_drag(drag_from_anywhere,new_center):
51+
ax=get_ax()
52+
53+
defonselect(epress,erelease):
54+
pass
55+
56+
tool=widgets.RectangleSelector(ax,onselect,interactive=True,
57+
drag_from_anywhere=drag_from_anywhere)
58+
# Create rectangle
59+
do_event(tool,'press',xdata=0,ydata=0,button=1)
60+
do_event(tool,'onmove',xdata=100,ydata=100,button=1)
61+
do_event(tool,'release',xdata=100,ydata=100,button=1)
62+
asserttool.center== (50,50)
63+
# Drag inside rectangle, but away from centre handle to make sure rectangle
64+
# is still moved
65+
do_event(tool,'press',xdata=25,ydata=25,button=1)
66+
do_event(tool,'onmove',xdata=75,ydata=75,button=1)
67+
do_event(tool,'release',xdata=75,ydata=75,button=1)
68+
asserttool.center==new_center
69+
# Check that in both cases, dragging outside the rectangle draws a new
70+
# rectangle
71+
do_event(tool,'press',xdata=175,ydata=175,button=1)
72+
do_event(tool,'onmove',xdata=185,ydata=185,button=1)
73+
do_event(tool,'release',xdata=185,ydata=185,button=1)
74+
asserttool.center== (180,180)
75+
76+
4777
deftest_ellipse():
4878
"""For ellipse, test out the key modifiers"""
4979
ax=get_ax()

‎lib/matplotlib/widgets.py

Lines changed: 27 additions & 7 deletions
Original file line numberDiff line numberDiff line change
@@ -2189,7 +2189,8 @@ def __init__(self, ax, onselect, drawtype='box',
21892189
minspanx=0,minspany=0,useblit=False,
21902190
lineprops=None,rectprops=None,spancoords='data',
21912191
button=None,maxdist=10,marker_props=None,
2192-
interactive=False,state_modifier_keys=None):
2192+
interactive=False,state_modifier_keys=None,
2193+
drag_from_anywhere=False):
21932194
r"""
21942195
Parameters
21952196
----------
@@ -2261,13 +2262,18 @@ def onselect(eclick: MouseEvent, erelease: MouseEvent)
22612262
default: "ctrl".
22622263
22632264
"square" and "center" can be combined.
2265+
2266+
drag_from_anywhere : bool, optional
2267+
If `True`, the widget can be moved by clicking anywhere within
2268+
its bounds.
22642269
"""
22652270
super().__init__(ax,onselect,useblit=useblit,button=button,
22662271
state_modifier_keys=state_modifier_keys)
22672272

22682273
self.to_draw=None
22692274
self.visible=True
22702275
self.interactive=interactive
2276+
self.drag_from_anywhere=drag_from_anywhere
22712277

22722278
ifdrawtype=='none':# draw a line but make it invisible
22732279
drawtype='line'
@@ -2407,8 +2413,9 @@ def _onmove(self, event):
24072413
y1=event.ydata
24082414

24092415
# move existing shape
2410-
elif (('move'inself.stateorself.active_handle=='C')
2411-
andself._extents_on_pressisnotNone):
2416+
elif (('move'inself.stateorself.active_handle=='C'or
2417+
(self.drag_from_anywhereandself._contains(event)))and
2418+
self._extents_on_pressisnotNone):
24122419
x0,x1,y0,y1=self._extents_on_press
24132420
dx=event.xdata-self.eventpress.xdata
24142421
dy=event.ydata-self.eventpress.ydata
@@ -2536,19 +2543,28 @@ def _set_active_handle(self, event):
25362543
e_idx,e_dist=self._edge_handles.closest(event.x,event.y)
25372544
m_idx,m_dist=self._center_handle.closest(event.x,event.y)
25382545

2546+
contains=self._contains(event)
25392547
if'move'inself.state:
25402548
self.active_handle='C'
25412549
self._extents_on_press=self.extents
2542-
25432550
# Set active handle as closest handle, if mouse click is close enough.
25442551
elifm_dist<self.maxdist*2:
2552+
# Prioritise center handle over other handles
25452553
self.active_handle='C'
2546-
elifc_dist>self.maxdistande_dist>self.maxdist:
2547-
self.active_handle=None
2548-
return
2554+
elif (c_dist>self.maxdistande_dist>self.maxdist):
2555+
# Not close to any handles
2556+
ifself.drag_from_anywhereandcontains:
2557+
# Check if we've clicked inside the region
2558+
self.active_handle='C'
2559+
self._extents_on_press=self.extents
2560+
else:
2561+
self.active_handle=None
2562+
return
25492563
elifc_dist<e_dist:
2564+
# Closest to a corner handle
25502565
self.active_handle=self._corner_order[c_idx]
25512566
else:
2567+
# Closest to an edge handle
25522568
self.active_handle=self._edge_order[e_idx]
25532569

25542570
# Save coordinates of rectangle at the start of handle movement.
@@ -2560,6 +2576,10 @@ def _set_active_handle(self, event):
25602576
y0,y1=y1,event.ydata
25612577
self._extents_on_press=x0,x1,y0,y1
25622578

2579+
def_contains(self,event):
2580+
"""Return True if event is within the patch."""
2581+
returnself.to_draw.contains(event,radius=0)[0]
2582+
25632583
@property
25642584
defgeometry(self):
25652585
"""

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