def __blank_tile_default(self):
import pkg_resources
import Image as pil
import ImageDraw
import ImageFont
im = pil.new('RGB', (256, 256), (234, 224, 216))
text = 'Image not available'
try:
font_file = pkg_resources.resource_filename(
'mapping.enable', 'fonts/Verdana.ttf')
font = ImageFont.truetype(font_file, 18)
except IOError:
font = ImageFont.load_default()
size = font.getsize(text)
pos = (256 - size[0]) // 2, (256 - size[1]) // 2
draw = ImageDraw.Draw(im)
draw.text(pos, text, fill=(200, 200, 200), font=font)
del draw
tile = StringIO()
im.save(tile, format='png')
return Image(StringIO(tile.getvalue()))
def gc_image_for(name, path=None):
"Convert an image file name to a cached Kiva gc containing the image"
global _app_path, _enable_path
filename = abspath(name)
image = _image_cache.get(filename)
if image is None:
cachename = filename
if path is not None:
zip_path = abspath(path + '.zip')
zip_file = _zip_cache.get(zip_path)
if zip_file is None:
if is_zipfile(zip_path):
zip_file = ZipFile(zip_path, 'r')
else:
zip_file = False
_zip_cache[zip_path] = zip_file
if isinstance(zip_file, ZipFile):
try:
filename = StringIO(zip_file.read(name))
except:
pass
try:
_image_cache[cachename] = image = Image(filename)
except:
_image_cache[filename] = info = sys.exc_info()[:2]
raise info[0], info[1]
elif type(image) is TupleType:
raise image[0], image[1]
return image
def fromfile(cls, filename):
""" Alternate constructor to create an ImageData from an image file
on disk. 'filename' may be a file path or a file object.
"""
from kiva.image import Image
img = Image(filename)
imgdata = cls(data=img.bmp_array, transposed=False)
fmt = img.format()
if fmt == "rgb24":
imgdata.value_depth = 3
elif fmt == "rgba32":
imgdata.value_depth = 4
else:
raise ValueError("Unknown image format in file %s: %s" %
(filename, fmt))
return imgdata
def test_initialization(self):
image = Image(self.filename)
self.assertEqual(image.width(), 100)
self.assertEqual(image.height(), 120)
self.assertEqual(image.format(), 'rgb24')
def __init__(self, *args, **kw):
super(ToolbarButton, self).__init__(*args, **kw)
image_resource = ImageResource(self.image)
self._image = Image(image_resource.absolute_path)
def _filename_changed(self, new):
self._marker = Image(new)
def _tile_cache_changed(self, new):
new.process_raw = lambda d: Image(StringIO(d))
