KDE Plasma 4 applet template for Qt Creator

main.cpp

#include "main.h"
#include <QPainter>

#include <plasma/theme.h>



MyPlasmaApplet::MyPlasmaApplet(QObject *parent, const QVariantList &args) : Plasma::Applet(parent, args)
{   // rather don't add other stuff here. Use init() instead
    setBackgroundHints(DefaultBackground);
    resize(200, 200);
}


MyPlasmaApplet::~MyPlasmaApplet()
{

}

void MyPlasmaApplet::init()
{

}


void MyPlasmaApplet::paintInterface(QPainter *p, const QStyleOptionGraphicsItem *option, const QRect &contentsRect)
{
    p->drawText(contentsRect, Qt::AlignTop|Qt::AlignHCenter, "Hello World!");
}

K_EXPORT_PLASMA_APPLET(myplasmaapplet, MyPlasmaApplet)

main.h

#ifndef MYPLASMAAPPLET_HEADER
#define MYPLASMAAPPLET_HEADER

#include <Plasma/Applet>

class MyPlasmaApplet : public Plasma::Applet {
    Q_OBJECT
public:
    MyPlasmaApplet(QObject* parent, const QVariantList &args);
    ~MyPlasmaApplet();
    void init();
    void paintInterface(QPainter *painter, const QStyleOptionGraphicsItem *option, const QRect &contentsRect);
};

#endif // MYPLASMAAPPLET_HEADER

myplasmaapplet.pro

QT       += core gui

CONFIG += plugin no_plugin_name_prefix release
TARGET = plasma_applet_myplasmaapplet
TEMPLATE = lib

HEADERS += main.h

SOURCES += main.cpp

INCLUDEPATH +="/usr/include/KDE/"

LIBS +=-lkdecore -lkdeui -lkutils -lkio

unix {
  INSTALLS        += target \
                     desktop

  desktop.path       = /usr/share/kde4/services/
  desktop.files     += plasma-applet-myplasmaapplet.desktop
  target.path        = /usr/lib/kde4/
  target.files      += plasma_applet_myplasmaapplet.so
}

DISTFILES += plasma-applet-myplasmaapplet.desktop
QMAKE_DISTCLEAN += *.so*

plasma-applet-myplasmaapplet.desktop

[Desktop Entry]
Name=My plasma applet
Comment=
Type=Service
ServiceTypes=Plasma/Applet
 
X-KDE-Library=plasma_applet_myplasmaapplet
X-KDE-PluginInfo-Name=myplasmaapplet
X-KDE-PluginInfo-Category=
X-KDE-PluginInfo-Author=
X-KDE-PluginInfo-Email=
X-KDE-PluginInfo-Version=0.1
X-KDE-PluginInfo-Website=
X-KDE-PluginInfo-Depends=
X-KDE-PluginInfo-License=GPL
X-KDE-PluginInfo-EnabledByDefault=true