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118 lines
3.9 KiB
Python
118 lines
3.9 KiB
Python
import sys
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import tkinter
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import unittest
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_tk_unavailable = None
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def check_tk_availability():
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"""Check that Tk is installed and available."""
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global _tk_unavailable
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if _tk_unavailable is None:
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_tk_unavailable = False
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if sys.platform == 'darwin':
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# The Aqua Tk implementations on OS X can abort the process if
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# being called in an environment where a window server connection
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# cannot be made, for instance when invoked by a buildbot or ssh
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# process not running under the same user id as the current console
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# user. To avoid that, raise an exception if the window manager
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# connection is not available.
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from ctypes import cdll, c_int, pointer, Structure
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from ctypes.util import find_library
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app_services = cdll.LoadLibrary(find_library("ApplicationServices"))
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if app_services.CGMainDisplayID() == 0:
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_tk_unavailable = "cannot run without OS X window manager"
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else:
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class ProcessSerialNumber(Structure):
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_fields_ = [("highLongOfPSN", c_int),
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("lowLongOfPSN", c_int)]
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psn = ProcessSerialNumber()
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psn_p = pointer(psn)
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if ( (app_services.GetCurrentProcess(psn_p) < 0) or
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(app_services.SetFrontProcess(psn_p) < 0) ):
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_tk_unavailable = "cannot run without OS X gui process"
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else: # not OS X
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import tkinter
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try:
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tkinter.Button()
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except tkinter.TclError as msg:
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# assuming tk is not available
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_tk_unavailable = "tk not available: %s" % msg
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if _tk_unavailable:
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raise unittest.SkipTest(_tk_unavailable)
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return
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def get_tk_root():
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check_tk_availability() # raise exception if tk unavailable
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try:
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root = tkinter._default_root
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except AttributeError:
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# it is possible to disable default root in Tkinter, although
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# I haven't seen people doing it (but apparently someone did it
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# here).
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root = None
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if root is None:
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# create a new master only if there isn't one already
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root = tkinter.Tk()
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return root
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def root_deiconify():
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root = get_tk_root()
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root.deiconify()
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def root_withdraw():
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root = get_tk_root()
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root.withdraw()
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def simulate_mouse_click(widget, x, y):
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"""Generate proper events to click at the x, y position (tries to act
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like an X server)."""
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widget.event_generate('<Enter>', x=0, y=0)
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widget.event_generate('<Motion>', x=x, y=y)
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widget.event_generate('<ButtonPress-1>', x=x, y=y)
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widget.event_generate('<ButtonRelease-1>', x=x, y=y)
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import _tkinter
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tcl_version = tuple(map(int, _tkinter.TCL_VERSION.split('.')))
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def requires_tcl(*version):
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return unittest.skipUnless(tcl_version >= version,
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'requires Tcl version >= ' + '.'.join(map(str, version)))
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units = {
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'c': 72 / 2.54, # centimeters
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'i': 72, # inches
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'm': 72 / 25.4, # millimeters
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'p': 1, # points
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}
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def pixels_conv(value):
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return float(value[:-1]) * units[value[-1:]]
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def tcl_obj_eq(actual, expected):
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if actual == expected:
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return True
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if isinstance(actual, _tkinter.Tcl_Obj):
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if isinstance(expected, str):
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return str(actual) == expected
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if isinstance(actual, tuple):
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if isinstance(expected, tuple):
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return (len(actual) == len(expected) and
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all(tcl_obj_eq(act, exp)
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for act, exp in zip(actual, expected)))
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return False
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def widget_eq(actual, expected):
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if actual == expected:
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return True
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if isinstance(actual, (str, tkinter.Widget)):
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if isinstance(expected, (str, tkinter.Widget)):
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return str(actual) == str(expected)
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return False
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