The document introduces the KDE Plasma desktop and its development. It discusses the different Plasma desktop interfaces like Plasma Desktop, Plasma Netbook, and Plasma Active. It also covers the main programming languages used in Plasma development and key concepts like widgets, containments, and runners. The document demonstrates how to create a simple clock widget applet and use data engines. It introduces tools for testing Plasma plugins and provides examples for reference.

1. KDE Plasma Desktop Develop Intro
CS Slayer
FAD 2011
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2. About Me
■ Fcitx Developer
■ KDE Fans: http://www.ikde.org
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3. KDE 15 years
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4. Plasma
Plasma Dev Intro
Language Support
Vocabulary
Easy Start
Tools
Test tool
KDE Examples
Q & A and Showtime
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5. Plasma Desktop
Desktop Shell for PC
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6. Plasma Netbook
Desktop Shell Designed for Netbook
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7. Plasma Active
New Tablet Interface
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8. Language Support
■ QML
■ Javascript
■ C++
■ Python
■ Ruby
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9. Language Support
Current Percentage of Language Usage:
■ Python 46%
■ C++ 44%
■ QML 6%
■ Javascript 4%
Ref: http://blogs.kde.org/node/4469
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10. Vocabulary
■ Widget
■ Containment
■ Date Engine
■ Runner
■ Wallpaper
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11. Create Your First Applet
Use Desktop file metadata.desktop to describe metadata of
widget.
[Desktop Entry]
Name=ClockWidget
Type=Service
X-KDE-PluginInfo-Author=saber
X-KDE-PluginInfo-Email=saber@none.org
X-KDE-PluginInfo-License=GPL
X-KDE-PluginInfo-Name=clockwidget
X-KDE-PluginInfo-Version=1
X-KDE-ServiceTypes=Plasma/Applet
X-Plasma-API=declarativeappletscript
X-Plasma-DefaultSize=200,100
X-Plasma-MainScript=code/clockwidget.qml
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12. Use Data Engine for data visualization
What's Data Engine?
■ Provide Data for Plasma Widget
Data can be obtained from hardware, network, filesystem, DBus,
or whatever you want.
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13. Data Engine
Why DataEngine?
■ Share data and code
■ Make data obtain process trivial
■ Communicate with data source
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14. Plasmate
■ Git Integration
■ Live Preview
■ Online Upload
■ Online Import
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15. Test tool
■ plasmoidviewer
■ plasmaengineexplorer
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16. KDE Examples
https://projects.kde.org/projects/kde/kdeexamples/
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17. Q & A and Showtime
Any questions?
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18. Thank you!
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