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Allow setting paper background colour

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This commit is contained in:
fruchti 2023-12-24 13:53:56 +01:00
parent 59f7311ede
commit fc374ad5b6
1 changed files with 9 additions and 3 deletions
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12
lib/plot.py
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@ -16,6 +16,7 @@ class Paper:
'left': 0
}
self.set_margins(margins)
self.background_colour = None
def set_margins(self, margins=None, top=None, right=None, bottom=None,
left=None):
@ -234,15 +235,20 @@ class SVGPlotter(Plotter):
def __init__(self, file_name, paper, line_width=0.5, colour=[0, 0, 0, 1]):
dpi = 72
width = paper.width / 25.4 * dpi
height = paper.height / 25.4 * dpi
self.file_name = file_name
self.surface = cairo.SVGSurface(file_name,
paper.width / 25.4 * dpi,
paper.height / 25.4 * dpi)
self.surface = cairo.SVGSurface(file_name, width, height)
self.context = cairo.Context(self.surface)
self.context.scale(dpi / 25.4, dpi / 25.4)
self.context.set_line_cap(cairo.LINE_CAP_ROUND)
self.context.set_line_join(cairo.LINE_JOIN_ROUND)
if paper.background_colour is not None:
self.context.set_source_rgba(*paper.background_colour)
self.context.rectangle(0, 0, width, height)
self.context.fill()
super().__init__(paper, line_width, colour)
def move_to(self, point):