Sha256: a132293165c91bb3386c5273522aca36c987c2ea73bfa0fd8ffc3a940528a817
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Size: 1.47 KB
Versions: 8
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Contents
# A platform-independent image; can be manipulated more extensively than
# Bitmap, but must be converted to a Bitmap for drawing.
class Wx::Image
# Load the type-guessing hash from Wx::Bitmap
require 'wx/classes/bitmap'
BITMAP_TYPE_GUESS = Wx::Bitmap::BITMAP_TYPE_GUESS
# Load a new image from an IO-like object that supports "read"
def self.read(an_io, type_or_mime, index = -1)
img = new
img.load_stream(an_io, type_or_mime, index)
img
end
# Create a new image from Wx::Bitmap, preserving mask information
def self.from_bitmap(bmp)
bmp.convert_to_image
end
# Redefine the initialize method so it raises an exception if a
# non-existent file is given to the constructor; otherwise, wx Widgets
# just carries on with an invalid image, which may cause faults
# later. Also, if loading from a file, and the type is not specified,
# try to guess it from the filename extension
wx_init = self.instance_method(:initialize)
define_method(:initialize) do | *args |
if args[0].kind_of? String
if not File.exist?( File.expand_path(args[0]) )
Kernel.raise(ArgumentError, "Image file does not exist: #{args[0]}")
end
# If type not specified, try to guess it from the file extension
if not args[1] and file_ext = args[0][/\w+$/]
args[1] = BITMAP_TYPE_GUESS[file_ext.downcase]
end
end
wx_init.bind(self).call(*args)
end
# Convert to bitmap
def convert_to_bitmap
Wx::Bitmap.from_image(self)
end
end
Version data entries
8 entries across 8 versions & 2 rubygems