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# Copyright (c) 2023, Manfred Moitzi
# License: MIT License
import pytest
from ezdxf.addons.drawing.frontend import _draw_viewports
from ezdxf.entities import Viewport
# The "id" attribute is not evaluated in the current implementation of VIEWPORT
# processing.
def new_viewport(status=0, id=0):
return Viewport.new(dxfattribs={"status": status, "id": id})
class Frontend:
def __init__(self):
self.viewports = []
def draw_viewport(self, vp):
self.viewports.append(vp)
@pytest.fixture
def frontend():
return Frontend()
def test_ignore_active_viewport(frontend):
# The "active" viewport determines how the paperspace layout is presented as a
# whole (location & zoom state).
vp0 = new_viewport(1, 1) # "active" viewport - ignored
vp1 = new_viewport(2, 2) # paperspace viewport - drawn
_draw_viewports(frontend, [vp0, vp1])
assert frontend.viewports[0] is vp1
def test_ignore_only_the_first_active_viewport(frontend):
vp0 = new_viewport(1, 1) # "active" viewport - ignored
vp1 = new_viewport(1, 1) # accidentally second "active" viewport - drawn
vp2 = new_viewport(2, 2) # paperspace viewport - drawn
_draw_viewports(frontend, [vp0, vp1, vp2])
assert frontend.viewports[0] is vp1
assert frontend.viewports[1] is vp2
def test_ignore_missing_active_viewport(frontend):
# No "active" viewport (status=1) defined - this is maybe not a valid paperspace
# setup!
vp0 = new_viewport(2, 2) # paperspace viewport - drawn
vp1 = new_viewport(3, 3) # paperspace viewport - drawn
_draw_viewports(frontend, [vp0, vp1])
assert frontend.viewports[0] is vp0
assert frontend.viewports[1] is vp1
def test_ignore_BricsCAD_off_viewports(frontend):
vp0 = new_viewport(1, 1) # "active" viewport - ignored
# BricsCAD set the id to -1 if the viewport is off and 'status' (group code 68)
# is not present.
vp1 = Viewport.new(dxfattribs={"id": -1})
vp2 = new_viewport(3, 3) # paperspace viewport - drawn
_draw_viewports(frontend, [vp0, vp1, vp2])
assert frontend.viewports[0] is vp2
def test_ignore_off_screen_viewports(frontend):
vp0 = new_viewport(1, 1) # "active" viewport - ignored
vp1 = new_viewport(-1, 2) # off-screen viewport - ignored
vp2 = new_viewport(2, 3) # paperspace viewport - drawn
_draw_viewports(frontend, [vp0, vp1, vp2])
assert frontend.viewports[0] is vp2
def test_draw_viewports_in_order_of_status(frontend):
vp0 = new_viewport(1, 1) # "active" viewport - ignored
vp1 = new_viewport(status=3, id=2)
vp2 = new_viewport(status=2, id=3)
_draw_viewports(frontend, [vp0, vp1, vp2])
assert frontend.viewports[0] is vp2
assert frontend.viewports[1] is vp1
if __name__ == "__main__":
pytest.main([__file__])
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