Adam Pletcher wrote:
A co-worker of mine is writing a tool to automate tasks in Photoshop, and
found a win32 error we can't explain. And possibly a bug.
The following script generates an error about how Select() can only take
one-dimensional arrays:
import win32com.client
ps_app = win32com.client.Dispatch('Photoshop.Application')
ps_app.Documents.Add(128, 128, 72)
# select a 10x10 square in the upper left corner of the document
sel_area = ((0, 0), (10, 0), (10, 10), (0, 10), (0, 0))
ps_app.ActiveDocument.Selection.Select(sel_area)
The error:
com_error: (-2147352567, 'Exception occurred.', (0, 'Adobe Photoshop',
'Illegal argument - argument 1\n- Only arrays with dimension 1 are
supported', None, 0, -2147220262), None)
File "c:\Python_Scripts\COM\Photoshop\selectionTest.py", line 7, in
<module>
ps_app.ActiveDocument.Selection.Select(sel_area)
File
"C:\Python25\Lib\site-packages\win32com\gen_py\E891EE9A-D0AE-4CB4-8871-F92C0109F18Ex0x9x0.py",
line 2606, in Select
, Type, Feather, AntiAlias)
The problem is that that method is documented as taking two dimensional
arrays. Here's an exerpt from the Photoshop CS3 VBScript Ref doc:
docH = appRef.ActiveDocument.Width / 2
docV = appRef.ActiveDocument.Height / 2
selRegion = Array( Array( topLeftH * docH, topLeftV * docV), _
Array( topLeftH * docH + docH, topLeftV * docV), _
Array( topLeftH * docH + docH, topLeftV * docV + docV), _
Array( topLeftH * docH, topLeftV * docV + docV), _
Array( topLeftH * docH, topLeftV * docV))
appRef.ActiveDocument.Selection.Select(selRegion)
It makes sense that it has to take a sequence of two-element sequences,
right? Oddly enough, if you run the above code using the comtypes
extensions instead of win32com, it works perfectly. The > first two lines
then become:
import comtypes.client
ps_app = comtypes.client.CreateObject('Photoshop.Application')
Any ideas why this throws an exception with win32com.client/Dispatch? Is
this a bug?
Thanks in advance.
- Adam
I think the difference here is whether to interpret the tuple as a 2-dim
array or
a 1 dim array of 1 dim arrays. Comtypes apparently does it in the way that
this particular API expects, although other applications may have different
requirements.
There's a patch (#1195096) for giving finer grained control over how arrays
are passed to and from COM calls.
Roger
_______________________________________________
python-win32 mailing list
python-win32@python.org
http://mail.python.org/mailman/listinfo/python-win32
