https://bugs.kde.org/show_bug.cgi?id=404749
caulier.gil...@gmail.com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |caulier.gil...@gmail.com
Component|Albums-MainView |Albums-Sort
--- Comment #1 from caulier.gil...@gmail.com ---
I Murray,
Thank for your proposal to help us in digiKam project.
Don't be afraid. even if digiKam is stamped as KDE familly application, we drop
85 % of KDE dependencies with new 6.0.0. The goal is to create a pure Qt
application in the future, with KDE support as optional. Marble application do
it very well.
So a Qt skill is simply enough here.
1/ First, you need to checkout digiKam code. We work currently to "dplugins"
branch from git repository, not master.
https://cgit.kde.org/digikam.git/log/?h=development/dplugins
2/ Configure, resolve dependencies, and compile digiKam. Look this
documentation for details :
https://www.digikam.org/api/index.html#externaldeps
3/ When application is compiled and installed, you are ready to play with code.
The feature that you request in this file is to implement a sort of item by
Color Labels or Pick Labels. The sort by Rating is already implemented. The
list of options are hosted to MainView/View/Sort Items/... menu entry.
All these menu options are implemented here :
https://cgit.kde.org/digikam.git/tree/core/app/main/digikamapp_setup.cpp?h=development/dplugins#n523
4/ To route these actions, all are managed by a QSignalMapper which finally
call this slot :
https://cgit.kde.org/digikam.git/tree/core/app/views/stack/itemiconview.cpp?h=development/dplugins#n1999
The sort roles is passed by the QSignalMapper map, and it will setup the
iconview kind of sort.
The ApplicationSettings call is to remmember the kind of sort between sessions.
This line is the core call to setup the model depending of sort :
d->iconView->imageFilterModel()->setSortRole((ItemSortSettings::SortRole)
sortRole);
After to setup the model, a signal is emitted to update the icon view contents.
It pass through ApplicationSettings.
5/ Icon view instance is a complex set of derived classes.
The high level is this one :
https://cgit.kde.org/digikam.git/tree/core/app/items/views/digikamitemview.cpp?h=development/dplugins#n79
derived from :
https://cgit.kde.org/digikam.git/tree/core/app/items/views/itemcategorizedview.cpp?h=development/dplugins#n112
derived from :
https://cgit.kde.org/digikam.git/tree/core/libs/widgets/itemview/itemviewcategorized.cpp?h=development/dplugins#n116
derived from :
https://cgit.kde.org/digikam.git/tree/core/libs/widgets/itemview/dcategorizedview.cpp?h=development/dplugins#n53
>From this level of classes, this important stuff is the image filter model to
setup with role.
This one is returned from
https://cgit.kde.org/digikam.git/tree/core/app/items/views/itemcategorizedview.cpp?h=development/dplugins#n210
And ItemFilterModel is defined in database models collection and method to set
sort rule is implemented here :
https://cgit.kde.org/digikam.git/tree/core/libs/database/models/itemfiltermodel.cpp?h=development/dplugins#n812
...which set the role in sort settings class :
https://cgit.kde.org/digikam.git/tree/core/libs/database/models/itemsortsettings.cpp?h=development/dplugins#n88
6/ the sort mechanism is of course depend of database contents and the models
classes must be patched to drive new king of sort. If you look into the model
settings class
There are 2 classes :
https://cgit.kde.org/digikam.git/tree/core/libs/database/models/itemfiltersettings.cpp?h=development/dplugins#n376
... Which is used to filter icon-view item with the right sidebar tab named
"Filters". This one already support Pick and Color labels.
https://cgit.kde.org/digikam.git/tree/core/libs/database/models/itemsortsettings.cpp?h=development/dplugins#n255
... used to sort items by criteria from View menu. Pick and color labels rules
are not implemented here.
Voilà for a first start...
Gilles Caulier
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