Hi,
First, as this is my first post to the dabo mailinglist, I would like
to show my gratitude to Ed, Paul, Nate, John, Jacek and Uwe for their
great work on the Dabo framework and their frequent contributions to
the mailing-lists. Thank you.
I recently tried to use the ClassDesigner to create a dPanel, which I
then included in a form using the following in my form's afterInit:
(bizobj instantiations...)
self.super()
self.Sizer = dabo.ui.dSizer("h")
PanelClass = dabo.ui.createClass("ui/PanSolutionsImport.cdxml",
show=False, parent=self)
self.Panel = PanelClass(self)
self.Sizer.append(self.Panel, "expand", proportion=1, valign="middle")
self.Sizer.layout()
Unfortunately, I found that instantiation of my form was terribly
slow, more than 12 sec! Obviously 12 sec instantiation is not
normal/expected behavior even for widgets created using the
classdesigner. I have already coded a similar form using the
classdesigner to create the whole dForm (and not just the panel), and
this instantiates in about 1 sec (from initProperties start to
afterInitAll end). Also, if I add a normal "handcoded" dPanel, it
instantiates in 1/10th of a second.
Is this a known issue? Or am I just doing something wrong? I've added
some info below that might shed some light on the situation, and on
request I can also show you the full cdxml's etc, but the issue
doesn't seem to depend on the particular panel. (I've also made a few
ad-hoc test panels to confirm the issue and they are all very slow.)
Best regards,
Rasmus Sorensen
------------- SUPPLEMENTARY INFORMATION: -------------------------------------
I used the following to time the instantiation:
starttime = datetime.datetime.now()
self.Panel = PanelClass(self)
endtime = datetime.datetime.now()
print endtime - starttime
and it is indeed the line "self.Panel = PanelClass(self)" that is the
source of the slow instantiation. I did a quick investigation to see
if there was a particular object in my cd-panel which was causing
this. My panel has a main vertical sizer with two slots, where the top
consists of three border-sizers with an average of 8 controls in each
(labels, textboxes, checkboxes, buttons, a radio-list and a single
dropdown list). The lower slot in the main sizer has a PageFrame with
three tabs, two of which has a grid.) This original panel took 12.3
sec to instantiate. I then started deleting objects to find the
source. After removing the PageFrame and the lower slot, time was
about 9 sec, removing one of the bordersizers reduced instantiation
time to 7.3 sec, and 3 sec after deleting the second bordersizer. A
single dPanel with a button and a label takes 0.8 sec to instantiate.
In conclusion, there doesn't seem to be a single cause for the slow
instantiation, but rather every single object in the dPanel adds a
quite considerable time to the instantiation. It also takes a
considerable amount of time to open the panel's cdxml file using the
class-designer (usually the classdesigner opens a cdxml file in 4 sec,
but in this case it takes more than 16 sec).
As mentioned, if I create a whole form in using the classdesigner, it
instantiates much faster, so my best guess is that there is some kind
of bad loop going on when instantiating cdxml panels. I have also
noted that the classdesigner add a lot of "default" properties to the
cdxml elements (which it omits when saving a complete panel). But, the
I know I could just continue to create complete forms with the
classdesigner, but I think that the optimal workflow for me is to use
the classdesigner to create the UI layout and then be able to code the
form with all it's logic using my normal editor (Spyder or vim).
Sysinfo:
Ubuntu 10.10
Python 2.6.6
Wx-config 2.8.11.0
Dabo revision: 6450 (svn) - I recall there was a recent issue with
panels in the ClassDesigner, but my panels have been created _after_
that was fixed by Ed.
PS: A few other things...
1) I noticed that dGridSizer::append1x(obj) method isn't really valid,
as the dGridSizer's append doesn't accept a "proportion" argument.
2) dBizObj::requery() tries to perform the following: oldDataStructure
= hash(self.DataStructure). In my case, this raised a TypeError
because DataStructure is a list, which is un-hashable.
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