How is it possible to use Wx::GraphicsContext#get_native_context with
rcairo? Let me quote the wxRuby documentation from
http://wxruby.rubyforge.org/doc/graphicscontext.html#GraphicsContext_getnativecontext
“Returns the native context (CGContextRef for Core Graphics, Graphics
pointer for GDIPlus and cairo_t pointer for cairo).” [1]
Is there a way to cast the data the cairo_t pointer points to into a
Cairo::Context? Everything I tried resulted in an ‘called on
terminated object’ error. Well, at least the reasonable attempts.
— snip ---------------------------------------------------------
#!/usr/bin/env ruby
require ‘rubygems’
require ‘wx’
require ‘cairo’
include Wx
class MyCanvas < Window
def initialize(parent)
super(parent)
timer = Timer.new(self, 1000)
evt_paint do
paint do |dc|
puts “painting on #{dc}”
gdc = GraphicsContext.create(dc)
# whatever I do with the native context, I get
# method ‘…’ called on terminated object
gdc.get_native_context
end
end
evt_timer(1000, :refresh)
timer.start(100)
end
end
class MyFrame < Frame
def initialize
super(nil, -1, ‘MyTitle’, :style => DEFAULT_FRAME_STYLE)
canvas = MyCanvas.new(self)
end
end
class MyApp < App
def on_init
frame = MyFrame.new
frame.show(true)
end
end
myapp = MyApp.new
myapp.main_loop
— snip ---------------------------------------------------------
Any help is highly appreciated
Best phil