Gwenview2 development steps

Hello,

If you are interested in helping the KDE4 port/rewrite of Gwenview, here is a 
list of the steps I intend to follow:

---
# Skeleton

Implement the three view modes and toggling of the sidebar. Use basic
widgets to show image and dir content.

# Document view

Implement the switch between the raster image, SVG and video views.

# Image view

Either use QGraphicsView or port Gwenview::ImageView to implement the real
image view widget.

# Image loader

Port Gwenview::Document. Try to improve the following aspects:
- Use only one way to decode images: either threaded or not.
- Provide a more generic way to access image metainfo (maybe use KDE API)
  instead of having lots of JPEG specific code around.

# Sidebar

Implement a sidebar widget. API should contain:
- SideBar::GroupPtr SideBar::createGroup(i18n("My group"))
- void SideBar::Group::addAction(KAction*)

# Implement sidebar actions

- file info
- file tasks
- image tasks

# Thumbnail view

Implement a custom delegate to draw content

# KParts

Implement the KParts. If possible, have one .so for both the image and the dir
KParts.
---

All this is subject to changes, but at least it should give you the general 
directions. Development will start in playground/graphics/gwenview and will 
move to kdegraphics when it's in a good enough shape.

Aurélien


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