kozorizki/gaphas
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Move context creation in update_now()

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It has to be done only once.
This commit is contained in:
Arjan Molenaar 2020-05-23 23:45:14 +02:00
parent 7e1d02e2ce
commit 9a13d1e33d
1 changed files with 7 additions and 9 deletions
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16
gaphas/canvas.py
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@ -622,15 +622,13 @@ class Canvas:
"""
self.update_now()
def _pre_update_items(self, items, cr):
c = Context(cairo=cr)
def _pre_update_items(self, items, context):
for item in items:
item.pre_update(c)
item.pre_update(context)
def _post_update_items(self, items, cr):
c = Context(cairo=cr)
def _post_update_items(self, items, context):
for item in items:
item.post_update(c)
item.post_update(context)
def _extend_dirty_items(self, dirty_items):
# item's can be marked dirty due to external constraints solving
@ -664,11 +662,11 @@ class Canvas:
self._dirty_items.clear()
try:
cr = instant_cairo_context()
context = Context(cairo=instant_cairo_context())
# allow programmers to perform tricks and hacks before item
# full update (only called for items that requested a full update)
self._pre_update_items(dirty_items, cr)
self._pre_update_items(dirty_items, context)
# recalculate matrices
dirty_matrix_items = self.update_matrices(self._dirty_matrix_items)
@ -705,7 +703,7 @@ class Canvas:
not self._dirty_items
), f"No items may have been marked dirty ({self._dirty_items})"
self._post_update_items(dirty_items, cr)
self._post_update_items(dirty_items, context)
except Exception as e:
logging.error("Error while updating canvas", exc_info=e)