Difference between revisions of "Development/Architecture/KDE4/Plasma"

Latest revision as of 14:24, 4 March 2013

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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 Graphics 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.

[edit] Further reading

@@ Line 2: / Line 2: @@
 <translate><!--T:1-->
-Plasma is the name of the new desktop planned to replace KDesktop in KDE4. You may think that it is a union of [http://netdragon.sf.net SuperKaramba] and KDesktop, but it's more. It's a whole concept of functionality and beauty.</translate>
+Plasma is the name of the new desktop which replaced KDesktop in KDE4. You may think that it is a union of [http://netdragon.sf.net SuperKaramba] and KDesktop, but it's more. It's a whole concept of functionality and beauty.</translate>
 <translate><!--T:2-->
-Its implementation is based on the Qt [http://doc.trolltech.com/graphicsview.html Graphics View Framework] introduced in Qt 4.2.</translate>
+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>
 <translate><!--T:3-->
@@ Line 11: / Line 11: @@
 * <translate><!--T:4-->
-'''Corona''': extends [http://doc.trolltech.com/qgraphicsscene.html QGraphicsScene] and provides functionality for adding applets and karamba themes.</translate>
+'''Corona''': extends [http://qt-project.org/doc/qt-4.8/qgraphicsscene.html QGraphicsScene] and provides functionality for adding applets and karamba themes.</translate>
 * <translate><!--T:5-->
-'''Widget''': extends [http://doc.trolltech.com/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 [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>
 * <translate><!--T:6-->
 '''Applet''': extends Widget and implements sophisticated functionality as rss display, a clock or system monitoring.</translate>