pythoncard-users Mailing List for PythonCard (Page 203)

 > The duplicate widget works as expected but if we are going to place the
> new widget in the same location as the original (instead of, say, offset
> by a few pixels) then can we have the new widget on top please?
>
> My expectation (from using similar techniques in other products) is to
> be able to duplicate a widget and then drag the new one to the location
> I want it to be in. This may be beyond us at the moment, if so I will
> add it to SF as a feature request so we don't forget.
I agree. The reason you currently get the new widget underneath the original
is because wxPython orders controls (widgets) like that; the first widget
created is in front of widget 2, widget 2 is in front of widget 3... What I
have to do is save the state of every widget, destroy every widget, then
recreate them all with the new widget being created first. As you can see,
quite a pain and messy to look at, but it is doable. A side effect of doing
this is that the new widget will end up as the first item instead of the
last one, which is what you would expect.
An alternative would be to simply let the duplicated item remain behind all
the other widgets, but offset it from the original. This is much easier to
do and will work except when the offset still leaves it behind other
widgets. So, choose your poison. I think I like the second solution the
best.
I'll still have to do the first solution when you want to reorder the
widgets as far as I can tell.
Any other suggestions I haven't thought of? Robin?
> Not from me. I'd love to be able to save resource files but I can I
> suggest the default behaviour is to not override an existing file? Not
> sure how we can do this with the wx file dialog but I can live in hope
> (or read the documentation).
I'll probably just have a Save As... which is easy enough. Initially,
whatever stack, background, menus are defined will just be output the way
they were originally except for the stack size and position. I also need to
save the state of the toolTips or just stop setting the toolTip, which
doesn't work very well anyway.
ka

Kevin Altis wrote:
>>Anyway, I'm trying to set the application focus in response to an event.
>>In particular, when the user presses a button in my application I would
>>like to lead them by the hand and place the cursor in another widget.
>>
> 
> Robin just showed me how stupid I was and after recovering from some
> dizziness due to banging my head against the desk I added a setFocus method
> to Widget. So, for any widget, you can do something like:
> 
> self.components.field1.setFocus()
> 
> If you want to remove the focus, then use:
> 
> self.components.field1.setFocus(0)
> 
> The change is checked into cvs.
> 
> ka
> 
Ta muchly, hope the pain subsides quickly. I'll include it in the next 
version of dbBrowser to show a working example.
Regards,
Andy
-- 
-----------------------------------------------------------------------
 From the desk of Andrew J Todd esq.
"Shave my poodle!"

I've been playing with this over the last couple of days and its looking 
good to me.
Kevin Altis wrote:
> I added a Duplicate Widget menu item and command. I also cleaned up the
> mouseDown selection code.
The duplicate widget works as expected but if we are going to place the 
new widget in the same location as the original (instead of, say, offset 
by a few pixels) then can we have the new widget on top please?
My expectation (from using similar techniques in other products) is to 
be able to duplicate a widget and then drag the new one to the location 
I want it to be in. This may be beyond us at the moment, if so I will 
add it to SF as a feature request so we don't forget.
> 
> Overall, it seems to be working pretty well, so I'm tempted to have it start
> saving files. Nobody has said whether the selection and resizing is working
> correctly on *nix. Any bugs to report on any platform?
Not from me. I'd love to be able to save resource files but I can I 
suggest the default behaviour is to not override an existing file? Not 
sure how we can do this with the wx file dialog but I can live in hope 
(or read the documentation).
> 
> Any other feedback? I realize that there are all sorts of things it doesn't
> do like Undo/Redo, Cut, Copy, Paste, multiple selections, etc. but it seems
> quicker and easier than hand coding all the component descriptions. I need
> to set the stack and background attributes, which is going to be clunky
> until we have more elaborate dialogs up and running, so I lean towards still
> editing those by hand in the .rsrc.py file, I would simply save some generic
> values for new .rsrc.py file.
That would seem the sensible approach. Of course, in PythonCard 1.0 we 
will provide a wizard to guide you through this and then have an 
application property sheet when these values can be changed.
> 
> One issue that I don't have a ready solution for is that I won't be able to
> preserve the original formatting of a .rsrc.py file when I do a save. Does
> this matter to anyone? I'm leaning towards an output format where each
> attribute of the stack, background, and components are on a separate line
> which will avoid problems with wrapping when people paste portions of a
> .rsrc.py in email, etc.
I think we would have to assume that if people are saving a resource 
description from the editor they would want a working file output. An 
alternative would be to provide a preview option showing the resource 
file to be output before it is saved. Then the hard core developer could 
just cut and paste the bits they want from the previewer to their own 
resource file.
> 
> I have some code that I wrote a while ago that imports Outlook contacts that
> I could turn into an Addresses sample. Other people could add import code
> for other formats. Perhaps I'll create that sample using the resourceEditor
> as a test later this week.
> 
> ka
> 
Regards,
Andy
-- 
-----------------------------------------------------------------------
 From the desk of Andrew J Todd esq.
"Shave my poodle!"

> Anyway, I'm trying to set the application focus in response to an event.
> In particular, when the user presses a button in my application I would
> like to lead them by the hand and place the cursor in another widget.
Robin just showed me how stupid I was and after recovering from some
dizziness due to banging my head against the desk I added a setFocus method
to Widget. So, for any widget, you can do something like:
self.components.field1.setFocus()
If you want to remove the focus, then use:
self.components.field1.setFocus(0)
The change is checked into cvs.
ka

http://www.htmlhelp.com/reference/css/
If somebody knows of a better one online, let me know, the one above seems
adequate for our purposes. The w3.org stuff is impenetrable as usual, but
they have a lot of links.
BTW, I am not going to write the parser to handle CSS descriptions for the
prototype. Somebody else is going to have to tackle that. If that means that
we are stuck with a variation of my initial font description solution for a
while, then so be it. I am going to go ahead and tweak the defaults and add
some kind of named set of default fonts, probably in a dictionary that you
can add to during runtime.
The developers on wx-dev handling the wxHtmlWindow would be very interested
in a CSS parser, so if you're interested you should probably check in over
there first.
ka

Since we might follow the CSS syntax for fonts, I thought it would be a good
time to look at wxHtmlWindow in wxPython. It might even be time to wrap the
wxHtmlWindow as another widget for PythonCard. Anyway, if you want to play
with it, you can just open up the minimal sample and then work from the
shell.
C:\python\PythonCardPrototype>samples\minimal\minimal.py -s
>>> bg = pcapp.getCurrentBackground()
>>> comp = bg.components
>>> from wxPython.wx import *
>>> from wxPython.html import *
>>> import wxPython.lib.wxpTag
>>> p = bg.panel._getDelegate()
>>> h = wxHtmlWindow(p, -1, (0, 30), (800, 500))
>>> h.LoadPage("../../docs/html/index.html")
Resize the minimal window in order to fit the HTML; you can also change the
size (800, 500) to fit your display resolution. You'll notice that the home
page doesn't actually display correctly, this is a limitation of
wxHtmlWindow. According to Robin: "Currently wxHTML is a simple subset of
just HTML 4." Of course, after I started this test, I found out the control
doesn't currently support CSS, which is part of the reason our home page and
samples don't display correctly. Also, it doesn't automatically handle URL
downloading when you click on links, except for local file references.
Read the wxHtmlWindow section of the wxWindows documenation. Look at the
wxHtmlWindow example in demo.py (wxPython) "Non-managed Windows" section.
And finally, you might want to search for "html" or "wxHtmlWindow" issues in
the wxpython-users mailing list:
http://aspn.activestate.com/ASPN/search?query=html&type=Archive_wxPython-use
rs
If someone would like to investigate wxHtmlWindow and summarize the
limitations, features we should add, etc. then that would be great. Someone
could also make an html sample as an experiment. Note you are not going to
be able to make a full-featured browser using this control.
Since PythonCard is built on top of wxPython, you can use wxPython directly
whenever you want, which many of the samples do. Eventually, those wxPython
elements will be wrapped by the PythonCard framework, but you can see how
easy it is to experiment and see which parts of wxPython we want to add.
ka

[Kevin]
> > I'll add encoding, though I'm sure we'll have to change whatever I add.
[Roman Suzi]
> I think Unicode/UTF-8 will be fine. Does wxPython support Unicode?
> (Though, non-Windows Russian developers will be wanting to
> choose koi8-r, cp1251, or whatever.)
 It looks to me like wxWindows only supports Unicode fully where the
underlying platform supports it which means, for now, on Windows NT and
derivatives. GTK+ 1.x (and hence wxGTK) does not support Unicode and GTK+
2.0 which will support Unicode is not ready yet. When GTK+ 2.0 is ready then
there may still be a delay in wrapping this within wxWindows.
 Neil

On 2001年8月26日, Kevin Altis wrote:
> > Russian or Hungarian developers (or from somewhere around there) will turn
> > up and use it to hook up the right things so that they can work with
> > PythonCard. Trust me on this one :-) And avoid sunscreen - it
> > contains lots
> > of very nasty chemicals :-(
> 
> I'll add encoding, though I'm sure we'll have to change whatever I add.
I think Unicode/UTF-8 will be fine. Does wxPython support Unicode?
(Though, non-Windows Russian developers will be wanting to 
choose koi8-r, cp1251, or whatever.)
 
I think that letting Unicode will eliminate problems which
arise with porting software from one system to another.
To prevent this hell (+ allow for special characters like
math notation, astrology, chemistry, etc, signs) I think
that there must be ONLY Unicode.
Sincerely yours, Roman A.Suzi
-- 
 - Petrozavodsk - Karelia - Russia - mailto:rn...@on... -
 

> Neil Hodgson
>
> I'll look at this from a CSS point of view as CSS is a "real standard"
> which works fairly well. These are not heavily held opinions and I don't
> mind if the font model is more wx specific. Since wxWindows uses "wxSWISS"
> style constants for settings rather than string forms, I'd aim for string
> forms that look much like CSS.
I agree. CSS would be better, I think the question is how far we take it.
> > I chose to combine and hide some of the wxPython font settings.
> A Font is
> > described by its optional attributes:
> > family: 'serif', 'sansSerif', 'monospace', 'default'
> > faceName: an actual font name from the system (Arial, Courier New...)
>
> CSS combines these as font-family with the particular names 'serif',
> 'sans-serif', 'cursive', 'fantasy', and 'monospace' being mapped
> by the user
> agent to available real fonts.
We need a list of face names to default to for each of these types for
different platforms. Is there a standard CSS font list? The last time I did
web pages for a living, CSS didn't exist, so I'm in the dark here :)
> > size: a number representing point size (8, 9, 10, etc.)
> > style: 'regular', 'bold', 'italic', 'boldItalic'
>
> Combining these makes no sense to me. I know the Microsoft font dialog
> does this but why have bold and italic combined and underline
> separate? (the
> reason the dialog does it is that the normal, bold, italics, and
> bolditalics
> are separate fonts often in separate files and you'll occasionally see
> demibold and oblique in that list). A richer weight parameter is more
> general and maps to CSS as does style being for italic or oblique.
Ultimately, we have to map to wxPython right now, so having a richer list is
fine as long as it is going to translate. I specifically mimicked the font
dialog since I thought that would be more intuitive. I will make underline
another style if it works on *nix and not just Windows.
> There should be an encoding or character set as well. Don't worry about
> what it means or how to use it. After everything else is working
> one or more
> Russian or Hungarian developers (or from somewhere around there) will turn
> up and use it to hook up the right things so that they can work with
> PythonCard. Trust me on this one :-) And avoid sunscreen - it
> contains lots
> of very nasty chemicals :-(
I'll add encoding, though I'm sure we'll have to change whatever I add.
> > I need to work on some mechanism, so that a list of alternative
> fonts can
> be
> > searched for in order such as ["Garamond, Times New Roman, Times"] in
> order
> > to make a match.
>
> CSS syntax compatibility may be worthwhile here - family is a space
> delimited string with multiword family names quoted.
Again, CSS is fine with me. It is mostly a matter of how far we take it and
how complex the parsing will be. Will the CSS syntax translate over to wxSTC
as well when we start setting font characteristics for individual characters
in a field?
ka

Kevin Altis:
 I'll look at this from a CSS point of view as CSS is a "real standard"
which works fairly well. These are not heavily held opinions and I don't
mind if the font model is more wx specific. Since wxWindows uses "wxSWISS"
style constants for settings rather than string forms, I'd aim for string
forms that look much like CSS.
> I chose to combine and hide some of the wxPython font settings. A Font is
> described by its optional attributes:
> family: 'serif', 'sansSerif', 'monospace', 'default'
> faceName: an actual font name from the system (Arial, Courier New...)
 CSS combines these as font-family with the particular names 'serif',
'sans-serif', 'cursive', 'fantasy', and 'monospace' being mapped by the user
agent to available real fonts.
> size: a number representing point size (8, 9, 10, etc.)
> style: 'regular', 'bold', 'italic', 'boldItalic'
 Combining these makes no sense to me. I know the Microsoft font dialog
does this but why have bold and italic combined and underline separate? (the
reason the dialog does it is that the normal, bold, italics, and bolditalics
are separate fonts often in separate files and you'll occasionally see
demibold and oblique in that list). A richer weight parameter is more
general and maps to CSS as does style being for italic or oblique.
> underline is currently turned off
 There should be an encoding or character set as well. Don't worry about
what it means or how to use it. After everything else is working one or more
Russian or Hungarian developers (or from somewhere around there) will turn
up and use it to hook up the right things so that they can work with
PythonCard. Trust me on this one :-) And avoid sunscreen - it contains lots
of very nasty chemicals :-(
> I need to work on some mechanism, so that a list of alternative fonts can
be
> searched for in order such as ["Garamond, Times New Roman, Times"] in
order
> to make a match.
 CSS syntax compatibility may be worthwhile here - family is a space
delimited string with multiword family names quoted.
 Neil

One other thing that you may be tempted to try, but which won't work is dot
dot set notation. For example:
 self.components.field1.text.size = 12 # can't change the font size
This won't work. You can do a get just fine:
 print self.components.field1.text.size
I don't think there is a workaround for the set + set problem, but one of
the Python wizards may have a solution. If you need to set a font property
for a widget, just get a reference to the font, change the attribute you are
interested in, then change the font for the widget.
Also, because the Font class doesn't actually keep a reference to a real
wxPython wxFont, you can just create a Font class that you want to use for a
group of widgets, then iterate through the widgets to make them all use the
same font characteristics. More on this kind of stuff as the fonts mature.
ka
> -----Original Message-----
> From: pyt...@li...
> [mailto:pyt...@li...]On Behalf Of Kevin
> Altis
> Sent: Sunday, August 26, 2001 6:11 PM
> To: pythoncard-Users
> Subject: [Pythoncard-users] fonts - day three
>
>
> dialog.py, test_dialogs.py, and widget.py have been updated in cvs to use
> the new Font class. This is highly experimental, but doesn't
> appear to break
> any existing samples.
>
> I chose to combine and hide some of the wxPython font settings. A Font is
> described by its optional attributes:
> family: 'serif', 'sansSerif', 'monospace', 'default'
> faceName: an actual font name from the system (Arial, Courier New...)
> size: a number representing point size (8, 9, 10, etc.)
> style: 'regular', 'bold', 'italic', 'boldItalic'
> underline is currently turned off
>
> If None is passed in to initialize the Font class then you currently get a
> Font with an empty faceName, a default family, 8 point, and
> 'regular' style.
> If a faceName is present, it overrides the family attribute. If
> you specify
> a faceName then you risk that font not being available on a different
> system. You should only use 'faceName' right now for cross-platform
> compatibility.
>
> You can provide a 'font' attribute in the .rsrc.py files for a widget such
> as:
>
> 'font':{'family':'monospace', 'size':12}
> 'font':{'faceName':'Garamond', 'size':10, 'style':'boldItalic'}
>
> or you can set the font while the program is running.
>
> f = PythonCardPrototype.widget.Font({'family':'monospace', 'size':12})
> self.field1.font = f
>
> I need to work on some mechanism, so that a list of alternative
> fonts can be
> searched for in order such as ["Garamond, Times New Roman,
> Times"] in order
> to make a match. I also need to provide a set of named fonts. Finally, I
> need to change the Font class initialization, so that the defaults aren't
> hard-coded, by using GetFont() on the background panel (Panel class) prior
> to initializing any of the widgets.
>
> ka
>
>
> _______________________________________________
> Pythoncard-users mailing list
> Pyt...@li...
> http://lists.sourceforge.net/lists/listinfo/pythoncard-users
>

>David LeBlanc
>
> I installed PyCard under my Python21 directory and all the samples i've
> tried do work more or less (get to that in a minute) except that
> I don't see
> how to get the turtle example to run any of it's scrpts. (.txt files).
> running (for example) "python wxturtlechaos.py" causes nothing to happen -
> no errors, nothing at all. (Later: AH! python test_turtle.py!! I ran this
> before but I guess I was focused on the shell and not the app window - got
> the scripts running - wow!)
Sounds like you figured it out. The turtle uses other modules which are in
the same directory, so I don't know how to get around the problem of knowing
which file to run other than to put it in the readme.txt. Suggestions
anyone?
> The only real glitches i've noted so far is that buttons and text
> tend to be
> scrunched, especially noticable on the DbBrowser sample. (Speaking of the
> DbBrowser sample, it works at times and at other times does not. It also
> does not deal well with mysql not running when it's started - croaks.)
Can you provide a JPEG screenshot? If you simply mean that the default font,
which on NT should be 8 point, then that is the default and normal and yes
it will look small depending on the size of your monitor and the resolution
you run at.
> All the samples report memory leaks, but that's probably not news in a
> prototype running samples. Here is a sample from running test_turtle.py:
>
> 20:33:20: There were memory leaks.
> 20:33:20: ----- Memory dump -----
> 20:33:20: wxFont at 1321ドルAC8, size 12
> 20:33:20: wxClientDC at 13685ドルB8, size 280
> 20:33:20: wxPen at 136ドルBBC8, size 12
> 20:33:20: wxPen at 136ドルDB28, size 12
> 20:33:20:
> 20:33:20:
> 20:33:20: ----- Memory statistics -----
> 20:33:20: 2 objects of class wxPen, total size 24
> 20:33:20: 1 objects of class wxClientDC, total size 280
> 20:33:20: 1 objects of class wxFont, total size 12
> 20:33:20:
> 20:33:20: Number of object items: 4
> 20:33:20: Number of non-object items: 0
> 20:33:20: Total allocated size: 316
Yes, the one time I ran with the debug wxPython I noticed that. Actually
until a few weeks ago PythonCard wouldn't even run with the debug wxPython,
but sadly I had to find that out by myself late at night after doing a
release ;-)
I have no clue whether these memory leaks are real leaks that need to be
fixed (nor do I know where to start looking) or something to expect with
code like wxPython which is wrapping C++ classes. Robin, Neil, somebody?
ka

Hi Ken;
Yes, it was me. I got some sort of mail from the sourceforge bug tracker
with my bug in it and I did use my email address to submit the bug so I
don't know why you didn't see it.
First things first:
Python 2.1
PyCard 0.43
NT 4.0 sp6 Workstation
My primary problem is not understanding exactly how to set up PyCard (sorry,
but that's easier then "PythonCard") so that I can run all the samples.
I installed PyCard under my Python21 directory and all the samples i've
tried do work more or less (get to that in a minute) except that I don't see
how to get the turtle example to run any of it's scrpts. (.txt files).
running (for example) "python wxturtlechaos.py" causes nothing to happen -
no errors, nothing at all. (Later: AH! python test_turtle.py!! I ran this
before but I guess I was focused on the shell and not the app window - got
the scripts running - wow!)
The only real glitches i've noted so far is that buttons and text tend to be
scrunched, especially noticable on the DbBrowser sample. (Speaking of the
DbBrowser sample, it works at times and at other times does not. It also
does not deal well with mysql not running when it's started - croaks.)
All the samples report memory leaks, but that's probably not news in a
prototype running samples. Here is a sample from running test_turtle.py:
20:33:20: There were memory leaks.
20:33:20: ----- Memory dump -----
20:33:20: wxFont at 1321ドルAC8, size 12
20:33:20: wxClientDC at 13685ドルB8, size 280
20:33:20: wxPen at 136ドルBBC8, size 12
20:33:20: wxPen at 136ドルDB28, size 12
20:33:20:
20:33:20:
20:33:20: ----- Memory statistics -----
20:33:20: 2 objects of class wxPen, total size 24
20:33:20: 1 objects of class wxClientDC, total size 280
20:33:20: 1 objects of class wxFont, total size 12
20:33:20:
20:33:20: Number of object items: 4
20:33:20: Number of non-object items: 0
20:33:20: Total allocated size: 316
I don't know how much time i'll have to spend on this, but I have been a
hypercard afficiando for a long time and have some documents from back then,
including an old HC 1.0 user's manual, some of the Danny Goodman HC 2.1
books, a book for a PC clone called Supercard, as well as my prize: "The
Hypercard Book" (or something like that) from Apple that describes the event
hierarchy and other internal tidbits about HC.
Dave LeBlanc
> -----Original Message-----
> From: Kevin Altis [mailto:al...@se...]
> Sent: Saturday, August 25, 2001 4:15 PM
> To: wh...@oz...
> Subject: more details on PythonCard question
>
>
> Hi,
> I'm hoping you're the same Dave LeBlanc that posted this bug report at SF:
> http://sourceforge.net/tracker/index.php?func=detail&aid=455220&gr
> oup_id=190
> 15&atid=119015
>
> I looked on comp.lang.python since there wasn't an email address
> associated
> with the post.
>
> Anyway, I would like to answer your questions. If you could join
> the mailing
> list and post there that would be great. I need a little more detail about
> what problems you were having in order to answer your question.
>
> The mailing list is at:
> http://lists.sourceforge.net/lists/listinfo/pythoncard-users
> Please make sure you have the latest release, 0.4.3
>
> Thanks,
>
> ka
> ---
> Kevin Altis
> al...@se...
>

> a faceName then you risk that font not being available on a different
> system. You should only use 'faceName' right now for cross-platform
> compatibility.
That should be 'family' for cross-platform compatibility.
ka

dialog.py, test_dialogs.py, and widget.py have been updated in cvs to use
the new Font class. This is highly experimental, but doesn't appear to break
any existing samples.
I chose to combine and hide some of the wxPython font settings. A Font is
described by its optional attributes:
 family: 'serif', 'sansSerif', 'monospace', 'default'
 faceName: an actual font name from the system (Arial, Courier New...)
 size: a number representing point size (8, 9, 10, etc.)
 style: 'regular', 'bold', 'italic', 'boldItalic'
 underline is currently turned off
If None is passed in to initialize the Font class then you currently get a
Font with an empty faceName, a default family, 8 point, and 'regular' style.
If a faceName is present, it overrides the family attribute. If you specify
a faceName then you risk that font not being available on a different
system. You should only use 'faceName' right now for cross-platform
compatibility.
You can provide a 'font' attribute in the .rsrc.py files for a widget such
as:
'font':{'family':'monospace', 'size':12}
'font':{'faceName':'Garamond', 'size':10, 'style':'boldItalic'}
or you can set the font while the program is running.
f = PythonCardPrototype.widget.Font({'family':'monospace', 'size':12})
self.field1.font = f
I need to work on some mechanism, so that a list of alternative fonts can be
searched for in order such as ["Garamond, Times New Roman, Times"] in order
to make a match. I also need to provide a set of named fonts. Finally, I
need to change the Font class initialization, so that the defaults aren't
hard-coded, by using GetFont() on the background panel (Panel class) prior
to initializing any of the widgets.
ka

After a painful day of exploring fonts in wxWindows, this is what I've
learned and still have questions about. I meant to post this yesterday, but
ran out of time, so don't be surprised when you see a "fonts - day three"
message later today.
Courier, Helvetica and Times Roman on Windows are called New Courier, Arial
and Times New Roman. These fonts serve as the base monospace, sans-serif and
serif typefaces used for the wxWindows/wxPython font families.
Are Courier, Helvetica and Times Roman the typeface names on Linux and
Solaris?
The foregroundColor for most widgets *is* the text color. You can see this
by changing the foregroundColor with the widgets sample (test_widgets.py).
The color range you can select from in the font dialog - which isn't even
available on Linux and Solaris (need to confirm) - has a very limited color
palette. If we support an explicit fontColor attribute for fonts as opposed
to using foregroundColor separately, then the UI for selecting colors
specific to fonts might be awkward.
Apparently wxWindows/wxPython only supports underline on Windows right now?!
Please confirm. Strikeout is not supported at all. It also appears that the
full range of Windows fonts is not supported by wxWindows.
Due to a bug in how fonts are handled for widgets (controls) in
wxWindows/wxPython you have to make a copy of a font and replace the
existing font for a widget rather than setting a font attribute directly.
There appears to be a bug when setting the weight, so that you have to
change another font attribute in addition to the weight for the change to be
registered with a widget. This may be a bug of my own, but I think it is
wxPython.
I did a PythonCard app that accesses wxPython font methods directly to
experiment with the various options. This is just a test and will not become
a sample, so I'm attaching it here instead.
ka

> From: Andy Todd
>
> Anyway, I'm trying to set the application focus in response to an event.
> In particular, when the user presses a button in my application I would
> like to lead them by the hand and place the cursor in another widget.
>
> For future use I'm thinking we would want to be able to change the
> application focus between different windows, regions, etc.
This came up last week for me when I was trying to do a Find for one of the
samples. Essentially, what you need to be able to do is post an event,
specifically a wxPython SetFocus event. Now that you've reminded me, I'll go
back and look at it, but we may have to wait until Rowland has some time to
look at the event framework before this will get fixed.
> Whilst I'm at it, we may want another attribute for each widget that
> indicates its tab order. It is sometimes useful to vary the navigation
> path between fields depending on various rules. Also, it may be
> necessary to specify widgets in a certain order in the resource file but
> have the default tab order through them to be different.
There is a SF tracker issue for this:
http://sourceforge.net/tracker/index.php?func=detail&aid=442241&group_id=190
15&atid=369015
> I know this is all irrelevant if you use the mouse to navigate to a
> specific widget, but in the kind of applications which I sometimes write
> (data entry for databases) where speed of input is optimum the default
> user behaviour is to use the tab key to navigate between elements so
> that you don't have to take your hand away from the keyboard at any time.
I added an 'order' list to components yesterday to keep track of the order
the widgets in the components dictionary were created. The creation order
determines the tab order in the panel as well as how the widgets overlap
right now. The first item in the .rsrc.py component list will be the first
item tabbed to and will overlap any other widgets defined after it.
The addition of the order list allowed me to fix the resourceEditor and
Property Editor so that the output of the View Attributes and Property
Editor components list now displays the widgets in the correct order.
ka

I can't seem to find a reference to this anywhere, but am willing to 
have my ignorance admonished.
Anyway, I'm trying to set the application focus in response to an event. 
In particular, when the user presses a button in my application I would 
like to lead them by the hand and place the cursor in another widget.
For future use I'm thinking we would want to be able to change the 
application focus between different windows, regions, etc.
If this is easy to do then feel free to send me a one line reply, 
alternatively I can raise this as a project issue at SF. I just thought 
I would share my question with the list before taking that step.
Whilst I'm at it, we may want another attribute for each widget that 
indicates its tab order. It is sometimes useful to vary the navigation 
path between fields depending on various rules. Also, it may be 
necessary to specify widgets in a certain order in the resource file but 
have the default tab order through them to be different.
I know this is all irrelevant if you use the mouse to navigate to a 
specific widget, but in the kind of applications which I sometimes write 
(data entry for databases) where speed of input is optimum the default 
user behaviour is to use the tab key to navigate between elements so 
that you don't have to take your hand away from the keyboard at any time.
Regards,
Andy
-- 
-----------------------------------------------------------------------
 From the desk of Andrew J Todd esq.
"Shave my poodle!"

Which release are you using? You can check by selecting 'About
PythonCard...' from the 'Debug' menu if you've enabled the Message Watcher,
Property Editor, or Shell when you started a sample. It will display a list
of version numbers such as:
PythonCard version: 0.4.3
wxPython version: 2.3.1
PyCrust version: 0.5.3
Python version: 2.1 (#15, Jun 15 2001, 14:13:47) [MSC 32 bit (Intel)]
Platform: win32
Hopefully, you're using release 0.4.3. If so, have you tried the
resourceEditor sample? You can open up any of the sample .rsrc.py sample
files or just start creating your own layout. Use the Attributes menu item
under the View menu to see the descriptions of the widgets on the current
layout. I've posted a few messages about the resourceEditor and there is a
readme.txt in the directory that is displayed if you select 'About
resourceEditor...' from the 'Help' menu.
Anyway, the other things you are asking for will eventually show up in some
form. Remember that this is a prototype and alpha quality code at that (at
least it is alpha-quality to me). The main purpose of the samples is to
stress the framework and identify the features that need to be added or
fixed.
ka
> -----Original Message-----
> From: pyt...@li...
> [mailto:pyt...@li...]On Behalf Of Ronald
> D Stephens
> Sent: Saturday, August 25, 2001 11:58 AM
> To: pyt...@li...
> Subject: [Pythoncard-users] PythonCard Visual Card Creator
>
>
> Unfortunately, just as I am making progress studying the samples
> code, I am forced to make an unexpected trip overseas again, I will
> be out of commission for a week and a half. So, at the risk of
> being embarassed by my obvious ignorance and naivete, I am going to
> summarize some thoughts I am having.
>
> What I most hope for is for someone to code a sort of visual card
> creator for PythonCard. In other words, a visual card creator
> might show a visual palette or window or card, with a group of
> icons at the top representing the various widgets that Kevin has
> already created for PythonCard. It is not necessary nor even
> desirable to show an infinite number of widgets; rather, only a small
> but representative sample of the widgets, one of each generic
> kind, sort of a mini sampling of the functionality of PythonCard, to
> allow beginnners or neophytes to begin coding real, usable
> mini-PythonCard gui's right away, from the beginining of their
> experience.
>
> I really believe in the concept of "hooking" potential users
> right up front, allowing them to then evolve or grow into the coding
> environment naturally, by trial and error, a little at a time.
>
> In any intellectual creation task, such as creating a program,
> the hardest thing of all, by far, is the first step. Most people
> never get started, because the first step is just too daunting
> and scary. But when and if a person completes a first step, no matter
> how small, and gets a psychic reward of success, they are hooked,
> and they may never turn back.
>
> So, a sample card or window, offering a small set of widgets,
> that can be pointed at and clicked on, and then dragged to the
> appropriate spot on the window, offers an inviting introduction
> to PythonCard. After placing the widget, a right click could bring
> up a properties window, or a menu offering the selection of all
> of the various PythonCard program modules, such as resource files,
> resource editors, or the master PythonCard programming environment.
>
> Some of this code to do this may be "borrowable" from elsewhere.
> What about Boa Constructor? With all of the open source programs
> like Boa, to do some sort of visual gui creation, aren't they
> available for code borrowing? Therr is nothing wrong with code
> borrwoing, as I understand it is an honor to have one's code
> stolen??? Of course, let me hasten to add, that what I have in moind
> here must be far simpler than anything Boa offers or does, or
> else it will miss sthe purpose.
>
> Now it would be nice if someone or some group would step up to
> the plate and help out on doing this piece of the programming. Kevin
> can't do it all by himself;-)))))))
>
> While we're at it, what about a visual metaphor for manipulating
> the cards in Pythoncard? Couldn't we create a visual "stack" of
> Pythoncards, sort of like the old Windows 3.1 Cardfile.exe
> program, does anyone remember that, that showed a rolodex type stack of
> cards for storing addresses, phone numbers and other contact
> information? A visual stack of Pythoncards could be manipulated easily
> and effectively.
>
>
> I hope someone will step up to the plate and help Kevn on this.
> I know that what I am so crudely and clumsily trying to describe
> must represent a tremendously difficult and arduous programming
> task, and so I am very presumptuous to even mention the topic. But
> think what a boon to programmers this could be?
>
> I am overwhelmingly impressed and overjoyed with what Kevin and
> you all have already created. I am humbled by my attempts to learn
> by studying the source code for the samples. I believe the
> programming model already being implented will represent a huge step
> forward for Python gui creation.
>
> But a visual metaphor for doing the simplest gui ceation, only,
> the introductory card creation, would be the coup de grace that
> would provide the introductory enticement to lure the multitudes
> of people, making PythonCard unstoppable, make it what some many of
> us have dreamed of. I hope I am not out of line to dream publicly
> on this list.
>
> Ron Stephens
>
> p.s. I must leave for the airport right now, so I apologize for
> the sketchy description of what I have in mind. I will be unable to
> add to it or answer questions for a week and a half. But maybe
> that's good. Those of you so much more knowledgeable and capable than
> I can probably create something much better than what I am
> imagining anyway. Suffice it to say, a visual, easy to use
> mini-introduction to creating pythoncards would be useful, and
> would help, even a this early stage in the development of Pythoncard,
> to attract users and maybe even contributors. It doesn't need to
> be fancy, not powerful, nor in any way complete; just an easy way
> to get started for users in creating the simplest PythonCard
> event driven gui applets, if you will.
>
> ...sorry for not being able to contribute, but admiring and
> grateful to all of those who do contribute, Ron Stephens
>
>
> _______________________________________________
> Pythoncard-users mailing list
> Pyt...@li...
> http://lists.sourceforge.net/lists/listinfo/pythoncard-users
>

Unfortunately, just as I am making progress studying the samples code, I am forced to make an unexpected trip overseas again, I will
be out of commission for a week and a half. So, at the risk of being embarassed by my obvious ignorance and naivete, I am going to
summarize some thoughts I am having.
What I most hope for is for someone to code a sort of visual card creator for PythonCard. In other words, a visual card creator
might show a visual palette or window or card, with a group of icons at the top representing the various widgets that Kevin has
already created for PythonCard. It is not necessary nor even desirable to show an infinite number of widgets; rather, only a small
but representative sample of the widgets, one of each generic kind, sort of a mini sampling of the functionality of PythonCard, to
allow beginnners or neophytes to begin coding real, usable mini-PythonCard gui's right away, from the beginining of their
experience.
I really believe in the concept of "hooking" potential users right up front, allowing them to then evolve or grow into the coding
environment naturally, by trial and error, a little at a time.
In any intellectual creation task, such as creating a program, the hardest thing of all, by far, is the first step. Most people
never get started, because the first step is just too daunting and scary. But when and if a person completes a first step, no matter
how small, and gets a psychic reward of success, they are hooked, and they may never turn back.
So, a sample card or window, offering a small set of widgets, that can be pointed at and clicked on, and then dragged to the
appropriate spot on the window, offers an inviting introduction to PythonCard. After placing the widget, a right click could bring
up a properties window, or a menu offering the selection of all of the various PythonCard program modules, such as resource files,
resource editors, or the master PythonCard programming environment.
Some of this code to do this may be "borrowable" from elsewhere. What about Boa Constructor? With all of the open source programs
like Boa, to do some sort of visual gui creation, aren't they available for code borrowing? Therr is nothing wrong with code
borrwoing, as I understand it is an honor to have one's code stolen??? Of course, let me hasten to add, that what I have in moind
here must be far simpler than anything Boa offers or does, or else it will miss sthe purpose.
Now it would be nice if someone or some group would step up to the plate and help out on doing this piece of the programming. Kevin
can't do it all by himself;-)))))))
While we're at it, what about a visual metaphor for manipulating the cards in Pythoncard? Couldn't we create a visual "stack" of
Pythoncards, sort of like the old Windows 3.1 Cardfile.exe program, does anyone remember that, that showed a rolodex type stack of
cards for storing addresses, phone numbers and other contact information? A visual stack of Pythoncards could be manipulated easily
and effectively.
I hope someone will step up to the plate and help Kevn on this. I know that what I am so crudely and clumsily trying to describe
must represent a tremendously difficult and arduous programming task, and so I am very presumptuous to even mention the topic. But
think what a boon to programmers this could be?
I am overwhelmingly impressed and overjoyed with what Kevin and you all have already created. I am humbled by my attempts to learn
by studying the source code for the samples. I believe the programming model already being implented will represent a huge step
forward for Python gui creation.
But a visual metaphor for doing the simplest gui ceation, only, the introductory card creation, would be the coup de grace that
would provide the introductory enticement to lure the multitudes of people, making PythonCard unstoppable, make it what some many of
us have dreamed of. I hope I am not out of line to dream publicly on this list.
Ron Stephens
p.s. I must leave for the airport right now, so I apologize for the sketchy description of what I have in mind. I will be unable to
add to it or answer questions for a week and a half. But maybe that's good. Those of you so much more knowledgeable and capable than
I can probably create something much better than what I am imagining anyway. Suffice it to say, a visual, easy to use
mini-introduction to creating pythoncards would be useful, and would help, even a this early stage in the development of Pythoncard,
to attract users and maybe even contributors. It doesn't need to be fancy, not powerful, nor in any way complete; just an easy way
to get started for users in creating the simplest PythonCard event driven gui applets, if you will.
...sorry for not being able to contribute, but admiring and grateful to all of those who do contribute, Ron Stephens

If you know anything about fonts, programming issues around fonts,
cross-platform font issues, wxPython font issues, cascading style sheets
(CSS), etc. or just have some opinions on what you want in terms of font
support, please contribute to this thread on the list. Fonts are not a
speciality of mine, so if I end up doing this one alone we're gonna have to
refactor many times ;-)
The time has come to add font support to all the widgets in PythonCard.
Since the prototype is based on wxPython, we're going to be limited by what
can be done with the wxWindows/wxPython library and we're going to be
further limited by what is going to work across platforms. Rowland and I
avoided adding MS Windows-specific features to any of the existing widgets,
and fonts should be handled the same way. This is also the time to start
looking at wrapping wxSTC (Scintilla) for styled text support, though I'm
still unclear on how the wxTE_RICH style for wxTextCtrl relates to wxSTC if
at all.
I encourage everyone to at least read the wxFont overview in the
wxWindows/wxPython documentation, but I'm going to include it at the end of
this message in case you don't know where to look. Other relevant sections
include: Font encoding overview, Unicode support in wxWindows, wxFont class,
wxFontDialog, and just about any other topic in the wxWindows docs with
'Font' in the name.
I don't want to use the wxWindows constants directly for font families, but
will probably use some equivelant mapping initially. I definitely want to
support basic style sheets, so that an app can define a fontStyleSheet and
then set the font for a widget simply by referring to the named
fontStyleSheet. This isn't going to be a full web CSS-like capability, but
we can borrow some of the ideas from CSS.
platform-specific features
In the future, we will probably have a some kind of setting so that if you
wanted to write a PythonCard app that uses platform-specific features the
framework will let you do so, but then make appropriate warnings when the
app is being written and run. So, if there is some feature that is
platform-specific that you want, you can still bring it up and it will get
posted into the feature requests.
ka
---
wxFont overview
Class: wxFont
A font is an object which determines the appearance of text, primarily when
drawing text to a window or device context. A font is determined by the
following parameters (not all of them have to be specified, of course):
Point size This is the standard way of referring to text size.
Family Supported families are: wxDEFAULT, wxDECORATIVE, wxROMAN, wxSCRIPT,
wxSWISS, wxMODERN. wxMODERN is a fixed pitch font; the others are either
fixed or variable pitch.
Style The value can be wxNORMAL, wxSLANT or wxITALIC.
Weight The value can be wxNORMAL, wxLIGHT or wxBOLD.
Underlining The value can be TRUE or FALSE.
Face name An optional string specifying the actual typeface to be used. If
NULL, a default typeface will chosen based on the family.
Encoding The font encoding (see wxFONTENCODING_XXX constants and the font
overview for more details)
Specifying a family, rather than a specific typeface name, ensures a degree
of portability across platforms because a suitable font will be chosen for
the given font family.
Under Windows, the face name can be one of the installed fonts on the user's
system. Since the choice of fonts differs from system to system, either
choose standard Windows fonts, or if allowing the user to specify a face
name, store the family id with any file that might be transported to a
different Windows machine or other platform.
----------------------------------------------------------------------------
----
Note: There is currently a difference between the appearance of fonts on the
two platforms, if the mapping mode is anything other than wxMM_TEXT. Under
X, font size is always specified in points. Under MS Windows, the unit for
text is points but the text is scaled according to the current mapping mode.
However, user scaling on a device context will also scale fonts under both
environments.

Evening all,
I was idly perusing the sample code (I do that on Friday nights, you 
know) and I discovered that none of the samples uses the logging module 
that is included in the prototype.
Determined to remedy this oversight I set about changing one of the 
samples and ten minutes later (beat that Kevin!), worldclock has been 
changed. The code in CVS has been updated and should be included in the 
next release.
If you are running it without a console window you will not notice any 
difference. If you have a console window the regular messages that used 
to be output are no longer. To get output you need to enable logging 
with the -l switch on the command line. Switch it on and all of the 
messages will be written to a file called pythoncard.log in the same 
directory as worlclock.py. Note that this file is overwritten each time 
you run the application, you have been warned!
Luckily the changes to the code were quite simple, just import the log 
class;
"""
from PythonCardPrototype.log import Log
"""
Then add a couple of lines to the __init__ method of your application class;
"""
self.log = Log.getInstance()
self.log.enableLevels( [ Log.ERROR, Log.WARNING, Log.DEBUG, Log.INFO ] )
"""
Then, when you want to output a message just use;
self.log.info( < whatever you need to output > )
or
self.log.debug( ... )
self.log.error( ... )
self.log.warning( ... )
When calling any of these methods you can (I'm told) include any number 
and combination of items (well, OK - objects), their 'repr' methods will 
be called to render them into a format suitable for writing to a file.
Note that I've enabled all of the log levels in the code, so running the 
sample application with -l you will see all of the messages that are 
output. As a general rule of thumb it is better to only enable ERROR and 
WARNING and to disable DEBUG and INFO. When you are actively changing 
or developing a module turn these on but don't forget to turn them back 
off when you ship.
Regards,
Andy
-- 
-----------------------------------------------------------------------
 From the desk of Andrew J Todd esq.
"Shave my poodle!"

PythonCard is a software construction kit (in the spirit of Apple's
HyperCard) written in Python.
You can download the latest release at:
http://sourceforge.net/project/showfiles.php?group_id=19015
Samples included in the latest release: addresses, conversions, dbBrowser,
dialogs, findfiles, minimal, proof, resourceEditor, searchexplorer, sounds,
SourceForgeTracker, textIndexer, tictactoe, turtle, widgets, worldclock
To see screenshots of some of the samples, visit:
http://pythoncard.sourceforge.net/samples.html
A description of each sample is included in the docs directory.
PythonCard home page
http://pythoncard.sourceforge.net/
SourceForge summary page
http://sourceforge.net/projects/pythoncard/
Mailing list
http://lists.sourceforge.net/lists/listinfo/pythoncard-users
PythonCard requires Python 2.1.x or later and wxPython 2.3.x. wxPython is
available at http://www.wxpython.org/
PythonCard relies on wxPython, it will support the Macintosh once wxPython
has been ported to the Mac.
PyCrust 0.5.3
PyCrust by Patrick K. O'Brien is included as part of the PythonCardPrototype
releases. If you would like to find our more about PyCrust or get a separate
distribution, please visit the home page at
http://sourceforge.net/projects/pycrust/
----------------------------
Changes since release 0.4.1 (2001年08月16日):
Release 0.4.3 2001年08月23日
Andy Todd converted worldclock so that it no longer requires
 an external JavaScript program to run
added samples.txt file to the docs directory to document the
 purpose of each sample application
fixed numerous display bugs in the Property Editor
 including the selection bug which was causing a KeyError
 when using the resourceEditor
resourceEditor changes
 added a Help menu, About resourceEditor... menu item
 View attributes display is now more complete
 Property Editor is shown by default
the Shell is now shown by default for the turtle sample
added addresses sample, which shows the conversion of an
 existing HyperCard stack background layout and data to
 PythonCard. addresses does transparent saves of data and can
 import contacts from Outlook as well.
disabled helpText attribute
Release 0.4.2.1 2001年08月21日
Property Editor is now a listener of the WidgetDict class
 so the component list is automatically updated
 as widgets are added and deleted
resourceEditor sample changes
 added Duplicate Widget menu item
 fixed the selection code
 Property Editor now updates correctly
script added to dbBrowser sample to populate a mySQL test
 database
Release 0.4.2 2001年08月20日
the PythonCard mailing list has moved to
 http://lists.sourceforge.net/lists/listinfo/pythoncard-users
the home page has been redesigned and the other HTML pages
 have been validated to make sure they conform to the HTML
 spec. the HTML pages in the docs\html directory can now
 be used locally, they will fetch the large JPEG images from
 the web.
the Property Editor can now edit widget attributes
added getPosition/setPosition and getSize/setSize to Background
added basic mouse events to StaticText, StaticLine, and Image
 widgets
converted Dan Winkler's original PythonCard demo app to
 the PythonCardPrototype framework, renamed it textIndexer
 and made it a sample. It currently requires ZODB to run
 You can use standalone ZODB or ZODB from Zope, see the
 readme.txt in the textIndexer directory for more info
Andy Todd added his dbBrowser sample which is able to browse
 mySQL databases. readme.txt in the dbBrowser directory for
 more info
added a resourceEditor sample, which is the beginnings of a GUI
 resource (.rsrc.py files) editor. see the readme.txt in the
 resourceEditor directory for more info

I sent this reply to Rob Andrews of the Useless Python site today. Useless
Python is at http://www.lowerstandard.com/python/
Rather than make a separate post to the list asking people to post questions
about PythonCard, you should just read the message below and then start
asking questions :)
ka
-----Original Message-----
From: Kevin Altis [mailto:al...@se...]
Sent: Thursday, August 23, 2001 3:46 PM
To: Rob Andrews
Subject: RE: opinions on PythonCard?
> I've bookmarked your homepage and downloaded your last release. Can you
> point to any documentation (however sketchy) available at this point?
> I'm happy to help out any way I can.
The samples are the best source of how-to. I posted a a samples description
before I went to lunch that is also in cvs and will be part of the next
release.
http://www.geocrawler.com/lists/3/SourceForge/14884/0/6467674/
Last week I asked people on the list to start submitting even the most basic
questions, so that I can start putting together docs from a newbie point of
view rather than my warped framework point of view, but we got little on the
list, probably partly because we switched list locations immediately after
that post. Anyway, I'm gonna ask again, then put out my own notes in the
meantime.
There is a brief tutorial.txt in the docs directory, and numerous helpful
bits in the list archives, which I'll try and bring forward for easier
consumption. spec.py in the package directory documents the available
widgets, events, and attributes. You have to look at widget.py to see all
the methods. The easiest way to play around is to start the shell when you
launch a sample. For example, typing:
minimal -s
Other command line options are -p (Property Editor), -m (Message Watcher)
and -l (log).
If you have the shell open, then you can use command-completion to see
attributes and methods of any object.
I hope that gets you started. The biggest help to the project at this point
is probably asking mundane questions to solicit answers, which can then
become the basis for documentation.
ka

> The problem I have is a generic Python problem that I need an answer to in
> order to finish the method. I'm adding string attributes like so:
> dStr += " '%s':'%s', \n" % (key, value)
> This doesn't escape the string, so if you have a single quote,
> newline, tab,
> etc. in the string then the output isn't going to be correct. I thought
> there was a general string escape method, but I'm not finding it. I can
> write my own to parse the string and put in \n \t \xhh for hex...
> but there
> has to be a routine that already does this for me in the standard
> libraries.
> Pointers please.
Doh. I shouldn't ever write documentation and code on the same day, writing
docs apparently makes me dumb.
repr() seems to do the job, though I didn't test all the special characters.
ka