Hi,
I''m doing some experiments with the ScreenDC class for on-screen
drawing. Drawing shapes like a circle or rectangle works fine, but when
I try to draw text onto the screen, nothing happens. I''m using the
wxruby-ruby19 gem with ruby 1.9.1p243 (2009-07-16 revision 24175)
[i686-linux] on an Ubuntu Karmic machine.
My code looks like this (I know, it doesn''t make much sense, but
it''s
only to demonstrate the problem):
-----------------------------------
#!/usr/bin/env ruby
#Encoding: UTF-8
require "wx"
class TestApp < Wx::App
include Wx
def on_init
Timer.every(1000) do
sc = ScreenDC.new
sc.font = NORMAL_FONT #To ensure there''s a font to draw with
sc.draw_rectangle(0, 0, 100, 100) #This gets drawn...
sc.draw_text("Test", 0, 150) #...but this doesn''t
end
end
end
x = TestApp.new
x.main_loop
-----------------------------------
The rectangle is drawn without problems, but I can''t find the text
anywhere on my screen.
Is this a bug?
Marvin
--
Posted via http://www.ruby-forum.com/.
Marvin G?lker wrote:> The rectangle is drawn without problems, but I can''t find the text > anywhere on my screen. > > Is this a bug? > > MarvinNobody experiencing the same problem? However, I''ve filed that as a bug now: http://rubyforge.org/tracker/index.php?func=detail&aid=27564&group_id=35&atid=218 Marvin -- Posted via http://www.ruby-forum.com/.
Hi Marvin Marvin G?lker wrote:> I''m doing some experiments with the ScreenDC class for on-screen > drawing. Drawing shapes like a circle or rectangle works fine, but when > I try to draw text onto the screen, nothing happens. I''m using the > wxruby-ruby19 gem with ruby 1.9.1p243 (2009-07-16 revision 24175) > [i686-linux] on an Ubuntu Karmic machine. > > My code looks like this...> sc.draw_text("Test", 0, 150) #...but this doesn''tI got round to trying your sample, running it with a debug build on Mac. The line above is causing an assertion in Wx to fail, and then a crash. The message I get is rather cryptic,: Assertion failed: ((min.y == p[0].y && max.y == p[order].y) || (min.y == p[order].y && max.y == p[0].y)), function crossing_count, file Paths/path-crossing.c, line 176. Abort trap But I''m not sure if this is because ScreenDC doesn''t work properly on Mac, or if there''s something else wrong with the usage. I''ve never tried drawing directly on the screen. sorry i can''t be more hlepful alex