54 lines
1.2 KiB
Ruby
54 lines
1.2 KiB
Ruby
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# Copyright (c) 2005 Ruby-GNOME2 Project Team
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# This program is licenced under the same licence as Ruby-GNOME2.
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#
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# $Id: cairo-line-cap.rb,v 1.1 2005/10/12 05:38:30 ktou Exp $
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=begin
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= cairo/Line Cap
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This demo shows how to use GDK and cairo to set line cap.
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From http://cairographics.org/samples/set_line_cap.html.
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=end
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require 'common'
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module Demo
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class CairoLineCap < CairoWindow
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def initialize
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super('cairo line cap')
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end
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def draw(cr)
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cr.set_line_width(0.12)
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cr.set_line_cap(Cairo::LINE_CAP_BUTT) # default
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cr.move_to(0.25, 0.2)
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cr.line_to(0.25, 0.8)
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cr.stroke
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cr.set_line_cap(Cairo::LINE_CAP_ROUND)
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cr.move_to(0.5, 0.2)
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cr.line_to(0.5, 0.8)
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cr.stroke
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cr.set_line_cap(Cairo::LINE_CAP_SQUARE)
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cr.move_to(0.75, 0.2)
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cr.line_to(0.75, 0.8)
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cr.stroke
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# draw helping lines
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cr.set_source_rgba(1, 0.2, 0.2)
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cr.set_line_width(0.01)
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cr.move_to(0.25, 0.2)
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cr.line_to(0.25, 0.8)
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cr.move_to(0.5, 0.2)
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cr.line_to(0.5, 0.8)
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cr.move_to(0.75, 0.2)
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cr.line_to(0.75, 0.8)
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cr.stroke
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end
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end
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end
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