Development/Architecture/KDE4/Plasma: Difference between revisions

    From KDE TechBase
    (updated links to qt doc)
    m ([http://qt-project.org/doc/qt-4.8/qradiobutton.html QRadioButton] → {{qt|QRadioButton}})
    Line 5: Line 5:


    <translate><!--T:2-->
    <translate><!--T:2-->
    Its implementation is based on the Qt [http://qt-project.org/doc/qt-4.8/qgraphicsview.html Graphics View Framework] introduced in Qt 4.2.</translate>
    Its implementation is based on the Qt [UNHANDLED MATCHGraphics View Framework] introduced in Qt 4.2.</translate>


    <translate><!--T:3-->
    <translate><!--T:3-->
    Line 11: Line 11:


    * <translate><!--T:4-->
    * <translate><!--T:4-->
    '''Corona''': extends [http://qt-project.org/doc/qt-4.8/qgraphicsscene.html QGraphicsScene] and provides functionality for adding applets and karamba themes.</translate>
    '''Corona''': extends {{qt|QGraphicsScene}} and provides functionality for adding applets and karamba themes.</translate>
    * <translate><!--T:5-->
    * <translate><!--T:5-->
    '''Widget''': extends [http://qt-project.org/doc/qt-4.8/qgraphicsitem.html QGraphicsItem] and works as simple elements in the desktop. There are some built-in in libplasma as icons or buttons.</translate>
    '''Widget''': extends {{qt|QGraphicsItem}} and works as simple elements in the desktop. There are some built-in in libplasma as icons or buttons.</translate>
    * <translate><!--T:6-->
    * <translate><!--T:6-->
    '''Applet''': extends Widget and implements sophisticated functionality as rss display, a clock or system monitoring.</translate>
    '''Applet''': extends Widget and implements sophisticated functionality as rss display, a clock or system monitoring.</translate>

    Revision as of 20:59, 3 August 2013


    Plasma is the name of the new desktop which replaced KDesktop in KDE4. You may think that it is a union of SuperKaramba and KDesktop, but it's more. It's a whole concept of functionality and beauty.

    Its implementation is based on the Qt [UNHANDLED MATCHGraphics View Framework] introduced in Qt 4.2.

    From a developer point of view there are some classes in libplasma who play central roles.

    • Corona: extends QGraphicsScene and provides functionality for adding applets and karamba themes.
    • Widget: extends QGraphicsItem and works as simple elements in the desktop. There are some built-in in libplasma as icons or buttons.
    • Applet: extends Widget and implements sophisticated functionality as rss display, a clock or system monitoring.
    • DataEngine: The common use of a DataEngine is to provide data to an applet for display. This allows a user interface elements to show all sorts of data.

    Further reading