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Added optional parameter to wxversion.select and friends that makes

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the options be required for a match.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@34087 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Robin Dunn
2005-05-17 00:36:18 +00:00
parent 0ef14ca557
commit c08df24903
2 changed files with 153 additions and 54 deletions
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15
wxPython/docs/CHANGES.txt
View File

@@ -9,7 +9,8 @@ Added wx.BrushFromBitmap to create a stippled brush in a single step.
Also added missing brysh style flags: wx.STIPPLE_MASK
wx.STIPPLE_MASK_OPAQUE.
wxMSW: Fix for controls when the system text fg colour is not black.
wxMSW: Fix for default control colours when the system text fg colour
is not black.
wxGTK: Patch #1171754, It is now possible to have a menu item that
both has an icon and is a submenu.
@@ -56,6 +57,18 @@ Added wx.lib.hyperlink from Andrea Gavana. It is a control like
static text that acts like a hyper-link, launching the system's
default browser in response to the clicks.
Added an optional parameter to wxversion.select that allows you to
specify that the extra components specified in the version string are
required. For example, if you ask for "2.6-unicode" but only the ansi
version is installed then by default the ansi version will be selected
as it considered close enough since the version numbers match. If you
want to force the options to be required then you can just add a True
parameter, like this::
import wxversion
wxversion.select("2.6-unicode", True)
import wx

188
wxPython/wxversion/wxversion.py
View File

@@ -15,18 +15,34 @@
"""
If you have more than one version of wxPython installed this module
allows your application to choose which version of wxPython will be
imported when it does 'import wx'. You use it like this::
imported when it does 'import wx'. The main function of this module
is `select` and you use it like this::
import wxversion
wxversion.select('2.4')
import wx
Or additional build options can also be selected, like this::
Or additional build options can also be selected, although they will
not be required if they are not installed, like this::
import wxversion
wxversion.select('2.5.3-unicode')
import wx
Or you can require an exact match on the build options like this::
import wxversion
wxversion.select('2.5.3-unicode', optionsRequired=True)
import wx
Finally you can also specify a collection of versions that are allowed
by your application, like this::
import wxversion
wxversion.select(['2.5.4', '2.5.5', '2.6'])
import wx
Of course the default wxPython version can also be controlled by
setting PYTHONPATH or by editing the wx.pth path configuration file,
but using wxversion will allow an application to manage the version
@@ -67,7 +83,7 @@ class VersionError(Exception):
#----------------------------------------------------------------------
def select(versions):
def select(versions, optionsRequired=False):
"""
Search for a wxPython installation that matches version. If one
is found then sys.path is modified so that version will be
@@ -75,23 +91,36 @@ def select(versions):
raised. This funciton should only be caled once at the begining
of the application before wxPython is imported.
:param version: Specifies the version to look for, it can
either be a string or a list of strings. Each
string is compared to the installed wxPythons
and the best match is inserted into the
sys.path, allowing an 'import wx' to find that
version.
:param versions: Specifies the version to look for, it can
either be a string or a list of strings. Each string is
compared to the installed wxPythons and the best match is
inserted into the sys.path, allowing an 'import wx' to
find that version.
The version string is composed of the dotted version
number (at least 2 of the 4 components) optionally
followed by hyphen ('-') separated options (wx port,
unicode/ansi, flavour, etc.) A match is determined by how
much of the installed version matches what is given in the
version parameter. If the version number components don't
match then the score is zero, otherwise the score is
increased for every specified optional component that is
specified and that matches.
Please note, however, that it is possible for a match to
be selected that doesn't exactly match the versions
requested. The only component that is required to be
matched is the version number. If you need to require a
match on the other components as well, then please use the
optional ``optionsRequired`` parameter described next.
:param optionsRequired: Allows you to specify that the other
components of the version string (such as the port name
or character type) are also required to be present for an
installed version to be considered a match. Using this
parameter allows you to change the selection from a soft,
as close as possible match to a hard, exact match.
The version string is composed of the dotted
version number (at least 2 of the 4 components)
optionally followed by hyphen ('-') separated
options (wx port, unicode/ansi, flavour, etc.) A
match is determined by how much of the installed
version matches what is given in the version
parameter. If the version number components don't
match then the score is zero, otherwise the score
is increased for every specified optional component
that is specified and that matches.
"""
if type(versions) == str:
versions = [versions]
@@ -101,7 +130,7 @@ def select(versions):
# A version was previously selected, ensure that it matches
# this new request
for ver in versions:
if _selected.Score(_wxPackageInfo(ver)) > 0:
if _selected.Score(_wxPackageInfo(ver), optionsRequired) > 0:
return
# otherwise, raise an exception
raise VersionError("A previously selected wx version does not match the new request.")
@@ -114,7 +143,7 @@ def select(versions):
# Look for a matching version and manipulate the sys.path as
# needed to allow it to be imported.
installed = _find_installed(True)
bestMatch = _get_best_match(installed, versions)
bestMatch = _get_best_match(installed, versions, optionsRequired)
if bestMatch is None:
raise VersionError("Requested version of wxPython not found")
@@ -127,8 +156,9 @@ def select(versions):
UPDATE_URL = "http://wxPython.org/"
#UPDATE_URL = "http://sourceforge.net/project/showfiles.php?group_id=10718"
_EM_DEBUG=0
def ensureMinimal(minVersion):
def ensureMinimal(minVersion, optionsRequired=False):
"""
Checks to see if the default version of wxPython is greater-than
or equal to `minVersion`. If not then it will try to find an
@@ -145,21 +175,30 @@ def ensureMinimal(minVersion):
bestMatch = None
minv = _wxPackageInfo(minVersion)
# check the default version first
defaultPath = _find_default()
if defaultPath:
defv = _wxPackageInfo(defaultPath, True)
if defv >= minv:
if defv >= minv and minv.CheckOptions(defv, optionsRequired):
bestMatch = defv
# if still no match then check look at all installed versions
if bestMatch is None:
installed = _find_installed()
if installed:
# The list is in reverse sorted order, so if the first one is
# big enough then choose it
if installed[0] >= minv:
bestMatch = installed[0]
# The list is in reverse sorted order, so find the first
# one that is big enough and optionally matches the
# options
for inst in installed:
if inst >= minv and minv.CheckOptions(inst, optionsRequired):
bestMatch = inst
break
# if still no match then prompt the user
if bestMatch is None:
if _EM_DEBUG: # We'll do it this way just for the test code below
raise VersionError("Requested version of wxPython not found")
import wx, webbrowser
versions = "\n".join([" "+ver for ver in getInstalled()])
app = wx.PySimpleApp()
@@ -182,21 +221,22 @@ def ensureMinimal(minVersion):
#----------------------------------------------------------------------
def checkInstalled(versions):
def checkInstalled(versions, optionsRequired=False):
"""
Check if there is a version of wxPython installed that matches one
of the versions given. Returns True if so, False if not. This
can be used to determine if calling `select` will succeed or not.
:param version: Same as in `select`, either a string or a list
of strings specifying the version(s) to check
for.
:param versions: Same as in `select`, either a string or a list
of strings specifying the version(s) to check for.
:param optionsRequired: Same as in `select`.
"""
if type(versions) == str:
versions = [versions]
installed = _find_installed()
bestMatch = _get_best_match(installed, versions)
bestMatch = _get_best_match(installed, versions, optionsRequired)
return bestMatch is not None
#----------------------------------------------------------------------
@@ -214,12 +254,12 @@ def getInstalled():
#----------------------------------------------------------------------
# private helpers...
def _get_best_match(installed, versions):
def _get_best_match(installed, versions, optionsRequired):
bestMatch = None
bestScore = 0
for pkg in installed:
for ver in versions:
score = pkg.Score(_wxPackageInfo(ver))
score = pkg.Score(_wxPackageInfo(ver), optionsRequired)
if score > bestScore:
bestMatch = pkg
bestScore = score
@@ -307,7 +347,7 @@ class _wxPackageInfo(object):
self.options = segments[1:]
def Score(self, other):
def Score(self, other, optionsRequired):
score = 0
# whatever number of version components given in other must
@@ -317,12 +357,29 @@ class _wxPackageInfo(object):
return 0
score += 1
# check for matching options, if optionsRequired then the
# options are not optional ;-)
for opt in other.options:
if opt in self.options:
score += 1
elif optionsRequired:
return 0
return score
def CheckOptions(self, other, optionsRequired):
# if options are not required then this always succeeds
if not optionsRequired:
return True
# otherwise, if we have any option not present in other, then
# the match fails.
for opt in self.options:
if opt not in other.options:
return False
return True
def __lt__(self, other):
return self.version < other.version or \
@@ -353,15 +410,27 @@ if __name__ == '__main__':
#sys.exit()
def test(version):
def test(version, optionsRequired=False):
# setup
savepath = sys.path[:]
#test
select(version)
print "Asked for %s:\t got: %s" % (version, sys.path[0])
pprint.pprint(sys.path)
print
select(version, optionsRequired)
print "Asked for %s, (%s):\t got: %s" % (version, optionsRequired, sys.path[0])
# reset
sys.path = savepath[:]
global _selected
_selected = None
def testEM(version, optionsRequired=False):
# setup
savepath = sys.path[:]
#test
ensureMinimal(version, optionsRequired)
print "EM: Asked for %s, (%s):\t got: %s" % (version, optionsRequired, sys.path[0])
# reset
sys.path = savepath[:]
@@ -370,13 +439,14 @@ if __name__ == '__main__':
# make some test dirs
names = ['wx-2.4',
'wx-2.5.2',
'wx-2.5.2.9-gtk2-unicode',
'wx-2.5.2.9-gtk-ansi',
'wx-2.5.1',
'wx-2.5.2.8-gtk2-unicode',
'wx-2.5.3']
names = ['wx-2.4-gtk-ansi',
'wx-2.5.2-gtk2-unicode',
'wx-2.5.3-gtk-ansi',
'wx-2.6-gtk2-unicode',
'wx-2.6-gtk2-ansi',
'wx-2.6-gtk-ansi',
'wx-2.7.1-gtk2-ansi',
]
for name in names:
d = os.path.join('/tmp', name)
os.mkdir(d)
@@ -401,19 +471,26 @@ if __name__ == '__main__':
test("2.5.2")
test("2.5-ansi")
test("2.5-unicode")
test("2.6")
test("2.6-ansi")
test(["2.6-unicode", "2.7-unicode"])
test(["2.6", "2.7"])
test(["2.6-unicode", "2.7-unicode"], optionsRequired=True)
# There isn't a unicode match for this one, but it will give the best
# available 2.4. Should it give an error instead? I don't think so...
test("2.4-unicode")
# Try asking for multiple versions
test(["2.6", "2.5.3", "2.5.2-gtk2"])
test(["2.5.2", "2.5.3", "2.6"])
try:
# expecting an error on this one
test("2.6")
test("2.9")
except VersionError, e:
print "Asked for 2.6:\t got Exception:", e
print "Asked for 2.9:\t got Exception:", e
# check for exception when incompatible versions are requested
try:
@@ -422,6 +499,15 @@ if __name__ == '__main__':
except VersionError, e:
print "Asked for incompatible versions, got Exception:", e
_EM_DEBUG=1
testEM("2.6")
testEM("2.6-unicode")
testEM("2.6-unicode", True)
try:
testEM("2.9")
except VersionError, e:
print "EM: Asked for 2.9:\t got Exception:", e
# cleanup
for name in names:
d = os.path.join('/tmp', name)