[opencms-dev] dev of auto-img-scale-down-feature for upload.jar in progress, feedback wanted...

[John Bieling]

Hi Alexander,

great idea, I will do it with the size-parameter beeing passed to the 
applet, I will read it from the folder the user is currently at (with 
upward-"search" if the current folder does not has it set). That way I 
do not need to prompt for anything during upload and the admin/user can 
set it as desired. Great.

But i did not start thinking about "how to do the scaling" - so I cannot 
tell you which lib I am going to use, will figure that out next week - 
But is there a problem? Can I not just use the same one opencms is 
using? But I will read me into that subject this week, so - you may 
help, but I will also teach myself about just that this week....

Cu
John



Alexander Kandzior schrieb:
> John,
>
> First of all thanks for the ant task to generate the upload applet. I will
> add this to the distribution as it makes live certainly easier.
>
> Second, in OpenCms 6.2 there is a feature that allows you to set a image
> scale property "image.size" to a folder as well as a global scale parameter.
> All images uploaded to this folder are scaled are scaled automatically to
> that size after the upload. Please see 
>
> CmsImageScaler
> org.opencms.file.types.CmsResourceTypeImage#getDownScaler(CmsObject cms,
> String rootPath)
>
> for more details about this feature.
>
> The only downturn of this approach is that the large images are uploaded
> first, wasting bandwidth etc. So adding a function to the upload applet
> would still be valuable. 
>
>   
>> Now some technical stuff, where to store the flags (force scaling  
>> yes/no, max height/width for each site- there could be more than one 
>> site in one installation) for the applet, direct in the database? I 
>> think i have no acces to the vfs with the opencms-functions from the 
>> applet, or do I?
>>     
>
> I would suggest using the function mentioned above to obtain the downscale
> parameters for the target folder, and then use 
>
> CmsImageScaler#toString()
>
> To convert this to a String and pass it to the applet as an additional
> parameter. In this approach, it would not make sense to allow larger images
> to be uplaoded as they would be downscaled on the server later anyway.
>
> Btw, which library are you planning to use to downscale the images with the
> applet?
>
> Kind Regards,
> Alex.
>
> -------------------
> Alexander Kandzior
>                                                                
> Alkacon Software GmbH  - The OpenCms Experts                  
> http://www.alkacon.com - http://www.opencms.org                 
>
>   
>> -----Original Message-----
>> From: opencms-dev-bounces at opencms.org 
>> [mailto:opencms-dev-bounces at opencms.org] On Behalf Of John Bieling
>> Sent: Friday, September 29, 2006 9:23 PM
>> To: The OpenCms mailing list
>> Subject: [opencms-dev] dev of auto-img-scale-down-feature for 
>> upload.jar in progress, feedback wanted...
>>
>> I just looked at the source of the upload.jar and it does not 
>> seem to be 
>> so hard to implement the auto-scale-down of uploaded 
>> images... There is 
>> a function called  "addFileToZip" which is the only point 
>> that needs to 
>> be changed. If the file that is to be added is an img, scale 
>> it before 
>> adding it.
>>
>> But I am not so sure about the "look & feel", here are my 
>> sugestion, any 
>> feedback would be helpfull.
>>
>> First, I want the admin of the page to preset some max height and max 
>> width, maybee even allow to force that without asking during upload.
>> Second, if the admin does not use that force-feature, each 
>> time an img 
>> is processed a new window pops up with
>>  - img preview
>>  - img name
>>  - option to "leave as is" - "scale to preset" and "scale to custom"
>>  - also a "dont ask again and process all upcoming images like this 
>> one"-checkbock
>>
>> My clients often have no idea how to edit their camera images, so I 
>> think that at a later stage, in that window the user can also select 
>> which PART of the source image is to be uploaded.
>>
>> Now some technical stuff, where to store the flags (force scaling  
>> yes/no, max height/width for each site- there could be more than one 
>> site in one installation) for the applet, direct in the database? I 
>> think i have no acces to the vfs with the opencms-functions from the 
>> applet, or do I?
>>
>> Thanks
>> John B.
>>
>>
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>>     
>
>
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