[prev in list] [next in list] [prev in thread] [next in thread] 

List:       koffice
Subject:    imageContainer proposal
From:       Thomas Zander <zander () xs4all ! nl>
Date:       2000-07-09 15:00:45
[Download RAW message or body]

-----------------------------------------
Included files (pictures/parts/formula's)
-----------------------------------------
- Pictures should never be rescaled if that means that there is image loss 
  at printing time
- It should be possible to keep files external. Kword(/*) should also notice a 
  changed file (preferably also at runtime) and reload it.
- In kword we have an image object.
- we also have a imageCollection object.
 
 
Proposal
--------
On placing the picture in the document we should create a thumbnail on screen at the
screensize. This counts for both internal and external pictures. With todays computers
I am not really concerned with filesizes anymore, besides; it would probably be about 
30k max.  The thumbs will be saved as:
 tar:pictures/
 
The internal pictures should be read into memory and saved to the tar in a dir like
  tar:raw-pictures/
and/or
  tar:raw-parts/
 
When another instance of the same picture/part is placed we should just use 
the same object we allready use. We could consider creating a newly 
scaled thumb if the sizes differ a lot. The raw file will stay untouched.


kofficecore/ImageContainer.cc
 manages a picture. You can ask it for thumbs, location, the raw file
 and it has a save function.
 - ImageContainer(QString filename, bool external);
    constructor.
    if filename starts with tar or external is set: store filename.
    otherwise read raw file in mem.
 - int getRefCount()
    keep internal usage count
 - koImage* getThumb(QSize);
    look in tar if there was a thumb. Otherwise create one of selected size.
    note that koImage also does referece checking.
 - void incCount();
    for usage count
 - void decCount();
    for usage count
 - koRawImage* getImage();
    Return the rawimage (in a stream??) either from mem or from disk.
 - save();
    well, it saves.
 
kofficecore/PartContainer.cc
 manages a part. You can as it for location (key), the part and it 
 has a save function
 - PartContainer
    constructor
 - getRefCount
 - void incCount()
 - void decCount();
 - koSomething* getPart();
 - save();
 
kofficeCore/ImageCollection.cc
 - ImageCollection();
 - ImageConatainer* getImage(filename);
    return imageContainer, if one doesnt exist create it first.
 - int getCount();
    return number of images in the collection
 - void removeImage(filename);
    remove image from collection
 - void load();
    load all imageContainers
 - void save();
    save all imageContainers
 
Note that you can not resize an image, just the thumbs.
Note also that the 'key' is its filename. With full path that makes it http://
or file:// or tar:// for remote, local, internal storage respectively.

Last note: this proposal does not propose any gui/printing issues at all.

-- 
Thomas Zander                                            zander@earthling.net
The only thing worse than failure is the fear of trying something new

[prev in list] [next in list] [prev in thread] [next in thread]