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Fix mouse handling in python demos

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This commit is contained in:
John Stowers 2013-09-10 13:35:57 +02:00
parent c0c575d68e
commit 42faaa8b39
1 changed files with 3 additions and 2 deletions
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5
samples/python2/common.py
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@ -91,14 +91,15 @@ class Sketcher:
pt = (x, y) pt = (x, y)
if event == cv2.EVENT_LBUTTONDOWN: if event == cv2.EVENT_LBUTTONDOWN:
self.prev_pt = pt self.prev_pt = pt
elif event == cv2.EVENT_LBUTTONUP:
self.prev_pt = None
if self.prev_pt and flags & cv2.EVENT_FLAG_LBUTTON: if self.prev_pt and flags & cv2.EVENT_FLAG_LBUTTON:
for dst, color in zip(self.dests, self.colors_func()): for dst, color in zip(self.dests, self.colors_func()):
cv2.line(dst, self.prev_pt, pt, color, 5) cv2.line(dst, self.prev_pt, pt, color, 5)
self.dirty = True self.dirty = True
self.prev_pt = pt self.prev_pt = pt
self.show() self.show()
else:
self.prev_pt = None
# palette data from matplotlib/_cm.py # palette data from matplotlib/_cm.py