I think having lots of alternatives is ok...  In one app I use 
(PaintShopPro) there are literally dozens of format options presented in 
the save dropdown.

Martin

On 10/18/2011 5:08 AM, Rahkonen Jukka wrote:
> How would you do the saving into GML with the three native dialects we have 
> (JUMP GML, GML 2.0 with hand written template, and FME GML) or possibly with 
> the fourth GML 2.0 variant if deejump plugin is installed?  If there would be 
> one line on the list for each alternative then the zip check box would be 
> better, otherwise we would need totally six or eight lines for GML save 
> formats.
>
> -Jukka-
>
> edgar.soldin wrote:
>> On 17.10.2011 22:46, Michaël Michaud wrote:
>>> Hi,
>>>> Would an even simpler alternative be to determine the
>> format from the
>>>> extension, where this is unabiguous, and if it is ambiguous or
>>>> undetermined then let the user choose the desired format?
>>> I think such a mechanism exist in the new OpenDialog Framework.
>>> If I'm correct, the double combobox currently appears
>>> 1) in the old openfile dialog (category context menu)
>>> 2) in the save as dialog box
>> i could only find them there too
>>
>>> I'm not sure the first one is still needed (but I think users had
>>> choosen to keep it when we migrated to the new framework)
>> even so, we currently have two ways to open files. how to
>> explain that to new users? better to have one only.
>>
>>> I thing the double dialog is of no use in the save as
>> dialog box where
>>> combinations of format and extension can be defined in a
>> single combobox.
>>> Zip could be a general option however (a checkbox)
>> i wouldn't say no use, but it is counter-intuitive. it would
>> be easy to merge the options into one dropdwon only without a
>> loss in capabilities.
>>
>>>> So examples are:
>>>> - if a .SHP file is chosen, the format is set to Shapefile
>> automatically.
>>>> - if a .ZIP or .XML file is chosen, the user must choose
>> the appropriate
>>>> format
>> for save i'd rather have
>>
>> ESRI (*.shp)
>> ESRI Compressed (*.zip)
>> GML (*.gml)
>> GML Compressed (*.zip)
>> ...
>>
>> or
>>
>> ESRI (*.shp)
>> GML (*.gml)
>> ...
>> and a checkbox that signals zipping enabled
>>
>>
>>> And even zip files could be automatically opened as long as
>> they contain
>>> unambiguous formats.
>> zip and tgz (i think) when opened with OpenFileWizard are
>> automatically scanned for files with known extensions and
>> opened with the appropriate factory.
>>
>>> My 2 cents
>> make it 4, ede
>>
>>> Michaël
>>>>
>>>>
>>>> So there is only one dropdown for Format, and then the checkbox
>>>>
>>>> On 10/14/2011 12:59 AM, edgar.sol...@web.de wrote:
>>>>>> On 10/13/2011 2:24 AM, edgar.sol...@web.de wrote:
>>>>>>> On 13.10.2011 01:02, Martin Davis wrote:
>>>>>>>> One reason for having the double choice of both format
>> and file name is
>>>>>>>> that there are formats (such as GML) which don't have
>> a standard file
>>>>>>>> extension that can be used to drive the choice of format.
>>>>>>>>
>>>>>>>> Also, in JUMP originally we supported a zipped
>> shapefile concept.  It
>>>>>>>> had the extension .zip, but was read by the Shapefile driver.
>>>>>>>>
>>>>>>>> One thing that could be do would be to use the file
>> extension to drive
>>>>>>>> the initial format setting, but allow it to be
>> overridden for files with
>>>>>>>> non-specific extensions.
>>>>>>>>
>>>>>>> How about a checkbox 'filter by extension', which can
>> be disabled allowing to select any file with any selection in
>> the format dropdown?
>>>>>> Ok, but I'm not sure how this solves the problem of
>> determining the
>>>>>> format of a file with an unknown extension?
>>>>>>
>>>>> there is no determination. but, it allows users to assign
>> a format of their choice to a file of their choice and try to open it.
>>>>> seen? ede
>>>>>
>>>>>
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