Zope-Product: superImageContainer

Hello,

there is an ongoing discussion about image manipulation in ZOPE/ZMS in  
this forum.

As a everyday need for a developer to get images right I wrote my own  
product to solve
this problem. I use it in all my projects, since that it's very easy  
to manipulate images to
almost any needs... It's far away from beeing perfect, at least it  
works ;-)

I'm happy to give a litte bit back to the open-source community I  
profited over years.

http://dev.telesma.com/exchange/superImageContainer.zip

Provide any feedback you like - like to hear from you.

cheers
Frank Rossi

ps. sorry, for my poor english...




superImageContainer Product for ZOPE
Version 1.0

Brief Description:
This product will solve most image manipulation needs in the life of a  
Zope developer...

Basic Function:
This product will deliver for the transfered image object the matching  
image out of the
superImageContainer instance. First case: If it doesn't exist in the  
container folder,
it creates one using PIL. Second case: If the modification time of the  
transfered image object
is greater than the one already created in container, the old one is  
erased and a new one is
created.

Features:
SCALE:  Scales proportionally to the given size.
CROP:  Scales to the given size and crops the image centered or  
centered:top.
FIT:  Scales to the given size and expands the image with a defined  
background color.
MASK:  Scales the image to the size of the mask and masks the image  
(advanced!)
WATERMARK:  Applies a watermark PNG to the image. Options are  
centered, scale, tile, bottomright, additional offset adjustment and  
opacity.

Zope Tabs:
PROPERTIES: this is the main function tab. Presets are done here.
DELETE: Will delete all image files in the instance folder except the  
repository folder.
VIEW: Will not work anymore because of the object parameter. Doesn't  
matter...

Requirements:
Will work on any Zope version. Hope so;-)
PIL (PythonImagingLibrary) is needed.
ZMS 2.11 is not tested. Perhaps there is a conflict with  
meta_type=['ZMSCustom'].

Installation:
- Put the superImageContainer folder in the products directory of your  
zope instance and restart.
- Import the test_superImageContainer.zexp (this holds some examples)  
and you will get an idea how it works.

Known Issues:
- The superImageContainer will only accept JPG as file input format,  
otherwise you will get an IOError.
- The size of the original image must be greater than the generated  
image, otherwise you will get an IOError.

To-Do List:
- Option for ExtFile-Images instead of Zope-Images. This will keep the  
ZODB small. Another advantage of
   ExtFile is the possibility to serve the images completely with  
Apache through a subdomain!




Zope Usage Example:
<dtml-in expr="imagesfolder.objectValues()">
	<dtml-let bild=sequence-item>
		<div><dtml-var expr="images_scale.index_html(bild)"></div>
	</dtml-let>
</dtml-in>


ZMS Usage Example:
<dtml-in "getObjChildren('example_image',REQUEST)">
	<dtml-let number=sequence-number>
		<dtml-if "number==1">
			<dtml-let bild=sequence-item>
				<dtml-if bild>
				<dtml-let bildname="getObjProperty('bild',REQUEST)">
					<a href="<dtml-var "bildname.getHref(REQUEST)">" title="">
				</dtml-let>
				<dtml-with expr="superImageContainer_Instance.index_html(bild,  
REQUEST, 'bild')">
				<img src="&dtml-absolute_url;" alt="" style="width:&dtml- 
width;px;height:&dtml-height;px;" />
				</dtml-with>
					</a>
				</dtml-if>
			</dtml-let>
		</dtml-if>
	</dtml-let>
</dtml-in>



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