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Allow bounding boxes to be calculated fom free-hand painted items

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This commit is contained in:
Arjan Molenaar 2020-07-10 10:49:56 +02:00
parent 694d075ed8
commit 4f089f1789
2 changed files with 9 additions and 5 deletions
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2
examples/demo.py
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@ -120,7 +120,7 @@ def create_window(canvas, title, zoom=1.0):
.append(FocusedItemPainter()) .append(FocusedItemPainter())
.append(ToolPainter()) .append(ToolPainter())
) )
view.bounding_box_painter = FreeHandPainter(BoundingBoxPainter(ItemPainter())) view.bounding_box_painter = BoundingBoxPainter(FreeHandPainter(ItemPainter()))
w = Gtk.Window() w = Gtk.Window()
w.set_title(title) w.set_title(title)
w.set_default_size(400, 120) w.set_default_size(400, 120)

12
gaphas/freehand.py
View File

@ -13,7 +13,7 @@ See: http://stevehanov.ca/blog/index.php?id=33 and
from math import sqrt from math import sqrt
from random import Random from random import Random
from gaphas.painter import Context from gaphas.painter import Context, Painter
class FreeHandCairoContext: class FreeHandCairoContext:
@ -133,16 +133,20 @@ class FreeHandCairoContext:
self.close_path() self.close_path()
class FreeHandPainter: class FreeHandPainter(Painter):
def __init__(self, subpainter, sloppiness=1.0, view=None): def __init__(self, subpainter, sloppiness=1.0, view=None):
self.subpainter = subpainter self.subpainter = subpainter
self.view = view
self.sloppiness = sloppiness self.sloppiness = sloppiness
if view:
self.set_view(view)
def set_view(self, view): def set_view(self, view):
self.view = view
self.subpainter.set_view(view) self.subpainter.set_view(view)
def draw_item(self, item, cairo):
# Bounding box painter requires painting per item
self.subpainter.draw_item(item, cairo)
def paint(self, context): def paint(self, context):
subcontext = Context( subcontext = Context(
cairo=FreeHandCairoContext(context.cairo, self.sloppiness), cairo=FreeHandCairoContext(context.cairo, self.sloppiness),