def test_temporary_chdir(self):
dir1 = os.getcwd()
with utils.temporary_chdir(utils.get_temp_directory()):
dir2 = os.getcwd()
dir3 = os.getcwd()
self.assertPathEquals(dir1, dir3)
self.assertPathEquals(dir2, utils.get_temp_directory())
with self.assertRaises(RuntimeError):
with utils.temporary_chdir(utils.get_temp_directory()):
raise RuntimeError()
dir4 = os.getcwd()
self.assertPathEquals(dir1, dir4)
def set_theme_advanced(self,
theme_name,
brightness=1.0,
saturation=1.0,
hue=1.0,
preserve_transparency=True,
output_dir=None,
advanced_name="advanced"):
"""
Load an advanced theme that is customized upon runtime. Requires
write permission into a temporary directory that is used to
temporarily store the custom theme. Only available with Img
library support (Tk 8.6 or higher, Python 3 unless you have
compiled Tk yourself).
:param theme_name: pixmap theme name to base the new theme on
:param brightness: brightness modifier for the pixmaps
:param saturation: saturation modifier for the pixmaps
:param hue: hue modifier for the pixmaps, limited to 0.0-2.0
:param preserve_transparency: When True, all black pixels in the
resulting images will be set to transparent instead, as
transparency is lost during RGBA->HSV conversion. Has no
effect when not changing hue.
:param output_dir: directory to put the theme in. By default,
a volatile temporary directory is used
:param advanced_name: Name to give to the new theme
:raises: RuntimeError when PNG images are not supported by Tk.
This usually applies to Python 2 platforms.
:raises: ValueError is theme is not available or valid
:raises: RuntimeError when the same name is used twice
"""
if not self.img_support:
raise RuntimeError(
"PNG images are not supported by your Tkinter installation")
# Check if the theme is a pixmap theme
if theme_name not in self.pixmap_themes:
raise ValueError("Theme is not a valid pixmap theme")
# Check if theme is available in the first place
if theme_name not in self.themes:
raise ValueError(
"Theme to create new theme from is not available: {}".format(
theme_name))
if advanced_name in self.themes:
raise RuntimeError(
"The same name for an advanced theme cannot be used twice")
# Unload advanced if already loaded
output_dir = os.path.join(
utils.get_temp_directory(),
advanced_name) if output_dir is None else output_dir
self._setup_advanced_theme(theme_name, output_dir, advanced_name)
# Perform image operations
image_directory = os.path.join(output_dir, advanced_name,
advanced_name)
self._setup_images(image_directory, brightness, saturation, hue,
preserve_transparency)
# Load the new theme
with utils.temporary_chdir(output_dir):
self.tk.call("lappend", "auto_path", "[{}]".format(output_dir))
self.tk.eval("source pkgIndex.tcl")
self.set_theme(advanced_name)
def test_get_temp_directory(self):
self.assertTrue(os.path.exists(utils.get_temp_directory()))