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| ==Abstract==
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| This tutorial needs KDE Frameworks 5 / Plasma 2 to build. | |
| We are going to create a simple plasmoid in this tutorial. To keep things simple, we are going to make have use QML 2.0 and it will use Plasma Components in our tutorial .
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| == Package Structure ==
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| You create a .desktop file and the .qml file. They have to be in the usual Plasma package structure:
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| * plasmoid/metadata.desktop
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| * plasmoid/contents/ui/main.qml
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| Your directory structure should now be as follows:
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| <syntaxhighlight lang="bash">
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| myproject/CMakeLists.txt
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| myproject/plasmoid/
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| myproject/plasmoid/metadata.desktop
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| myproject/plasmoid/contents/
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| myproject/plasmoid/contents/ui/
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| myproject/plasmoid/contents/ui/main.qml
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| </syntaxhighlight>
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| == The Code ==
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| === The .desktop file ===
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| Every Plasmoid needs a .desktop file to tell plasma how it should be started and what name it carries.
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| '''metadata.desktop'''
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| <syntaxhighlight lang="ini">
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| [Desktop Entry]
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| Encoding=UTF-8
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| Name=Tutorial
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| Comment=Tutoial on getting started with plasma2 plasmoids .
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| Type=Service
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| X-KDE-ParentApp=
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| X-KDE-PluginInfo-Author=Heena
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| X-KDE-PluginInfo-License=GPL
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| X-KDE-PluginInfo-Name=org.kde.tutorial
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| X-KDE-PluginInfo-Version=2.0
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| X-KDE-PluginInfo-Website=plasma.kde.org
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| X-KDE-ServiceTypes=Plasma/Applet
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| X-Plasma-API=declarativeappletscript
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| X-Plasma-MainScript=ui/main.qml
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| X-Plasma-RemoteLocation=
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| X-KDE-PluginInfo-Category=Windows and Tasks
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| </syntaxhighlight>
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| The most important bits are the '''X-KDE-Library''' and '''X-KDE-PluginInfo-Name''', they are the "glue" between your class and plasma, without it, nothing will start. For '''X-KDE-PluginInfo-Category''', refer to the [[Projects/Plasma/PIG | PIG]].
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| === <tt>main.qml</tt> ===
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| <syntaxhighlight lang="javascript">
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| import QtQuick 2.0
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| import org.kde.plasma.components 2.0 as PlasmaComponents
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| PlasmaComponents.Label {
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| text: "Hello world in plasma2 ";
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| }
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| </syntaxhighlight>
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| === Building it all, the CMakeLists.txt ===
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| Finally, to put everything together you need to build everything. All you need is to put
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| <syntaxhighlight lang="javascript">
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| plasma_install_package(tutorial org.kde.tutorial plasma/plasmoids applet)
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| </syntaxhighlight>
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| For more details on CMake please read [[Development/Tutorials/CMake]]
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| == Representations ==
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| The plasmoid can pprovide two components: compactRepresentation and FullRepresentation
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| <syntaxhighlight lang="javascript">
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| import QtQuick 2.0
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| import QtQuick.Layouts 1.1
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| import org.kde.plasma.plasmoid 2.0
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| import org.kde.plasma.core 2.0 as PlasmaCore
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| Item {
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| Plasmoid.compactRepresentation: CompactRepresentation {}
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| Plasmoid.fullRepresentation: FullRepresentation {}
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| }
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| </syntaxhighlight>
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| where the files CompactRepresentation.qml and FullRepresentation.qml exist in the plasmoid package.
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| They are both optional: if compactRepresentation is not present, a default one will be created (the plasmoid icon) if fullRepresentation is not defined, the root item will be picked instead.
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| If a fullRepresentaion is defined, the root item will not contain any graphical element (they will be never shown) but is only supposed to contain models and data that must be accessible from both the compact and the full representation.
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| == Minimum size ==
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| if the root object of the plasmoid (or the fullRepresentation if present) has the Layout attached property exposed, they will be used as the minimum size for the plasmoid. If they will change during the plasmoid execution, the plasmoid minimum size will be updated accordingly.
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| <syntaxhighlight lang="javascript">
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| import QtQuick 2.0
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| import QtQuick.Layouts 1.1
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| import org.kde.plasma.components 2.0 as PlasmaComponents
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| PlasmaComponents.Label {
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| Layout.minimumWidth : formFactor == PlasmaCore.Types.Horizontal ? height : 1
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| Layout. minimumHeight : formFactor == PlasmaCore.Types.Vertical ? width : 1
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| text: "Hello world in plasma5 ";
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| }
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| </syntaxhighlight>
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| In the above example, the minimum width will be the height in case the formFactor is Horizontal .Similarly , if the formFactor is Vertical then minimumHeight shall be the width as shown in the above example .
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| == Localization ==
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| It is possible to localize strings with the usual i18n(), i18nc(), i18np() global functions.
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| ==Install==
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| ===Cmake===
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| Just you need to put
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| <syntaxhighlight lang="javascript">
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| plasma_install_package(tutorial org.kde.tutorial plasma/plasmoids applet)
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| </syntaxhighlight>
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| in your CMakeLists.txt and you will be fine .
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| ===Plasmapkg===
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| You can install your plasmoid, though obviously this is just temporary. CMake, below, is recommended:
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| <syntaxhighlight lang="bash">
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| plasmapkg2 --install plasmoid_plasma5
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| </syntaxhighlight>
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| == Testing the Applet ==
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| If your current Development Environment differs from the Test Installation, you have to run cmake with -DCMAKE_INSTALL_PREFIX=$KF5. Then run make. If succesfull the applet can be installed by running sudo make install
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| and run kbuildsycoca5 (so that KDE apps will know about the new desktop files).
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| In order to test your Applet you can load the plasma2 plasmoid in plasma-shell as shown :
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| <syntaxhighlight lang="bash">
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| kbuildsycoca5 #Needed once to let KDE know there is a new plugin
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| plasma-shell
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| </syntaxhighlight>
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| You can even find your plasmoid in ~./local5 after you build it .
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| Where '''applet_name''' is the value specified into .desktop for the '''X-KDE-PluginInfo-Name''' key.
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| == Wow that was fun! ==
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| Congrats! you just made your first qml 2.0 Plasmoid.
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