new way for sending data

plasmoid has an externalData signal, and will be used like
Connections {
        target: plasmoid
        onExternalData: {
            if (mimetype === "text/plain") {
                noteText.text = data
            }
        }
    }

a notes example applet describes its use

examples/applets/CMakeLists.txt

@@ -1,11 +1,12 @@
  
 plasma_install_package(config org.kde.example.configuration)
 plasma_install_package(localegallery org.kde.example.locale)
+plasma_install_package(notes org.kde.example.notes)
 plasma_install_package(widgetgallery org.kde.example.widgetgallery)
 plasma_install_package(qmltasks org.kde.example.tasks)
 plasma_install_package(windowthumbnails org.kde.example.windowthumbnails)
 plasma_install_package(conditionalloader org.kde.example.conditionalloader)
 plasma_install_package(testcomponents org.kde.example.testcomponents)
 plasma_install_package(testshaders org.kde.example.testshaders)
-plasma_install_package(helloworld org.kde.examples.helloworld)
-plasma_install_package(compactrepresentation org.kde.examples.compactrepresentation)
+plasma_install_package(helloworld org.kde.example.helloworld)
+plasma_install_package(compactrepresentation org.kde.example.compactrepresentation)

examples/applets/config/contents/config/argsrc

@@ -1,2 +0,0 @@
-[General] 
-text/plain=Test

examples/applets/config/metadata.desktop

@@ -23,4 +23,3 @@ X-KDE-PluginInfo-Name=org.kde.example.configuration
 X-KDE-PluginInfo-Version=
 X-KDE-PluginInfo-Website=
 X-Plasma-MainScript=ui/main.qml
-X-Plasma-DropMimeTypes=text/plain

examples/applets/notes/contents/config/main.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<kcfg xmlns="http://www.kde.org/standards/kcfg/1.0"
+      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+      xsi:schemaLocation="http://www.kde.org/standards/kcfg/1.0
+      http://www.kde.org/standards/kcfg/1.0/kcfg.xsd" >
+  <kcfgfile name=""/>
+
+  <group name="General">
+    <entry name="Text" type="String">
+      <label>Notes text</label>
+      <default>Hello!</default>
+    </entry>
+  </group>
+
+</kcfg>

examples/applets/notes/contents/ui/main.qml

@@ -0,0 +1,45 @@
+/*
+ *   Copyright 2013 Marco Martin <mart@kde.org>
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Library General Public License as
+ *   published by the Free Software Foundation; either version 2 or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details
+ *
+ *   You should have received a copy of the GNU Library General Public
+ *   License along with this program; if not, write to the
+ *   Free Software Foundation, Inc.,
+ *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+import QtQuick 2.0
+import org.kde.plasma.core 2.0 as PlasmaCore
+import org.kde.plasma.components 2.0 as PlasmaComponents
+
+PlasmaCore.SvgItem {
+    property int minimumWidth: 150
+    property int minimumHeight: 150
+    svg: PlasmaCore.Svg("widgets/notes")
+    elementId: "yellow-notes"
+
+    Connections {
+        target: plasmoid
+        onExternalData: {
+            if (mimetype === "text/plain") {
+                noteText.text = data
+            }
+        }
+    }
+
+    PlasmaComponents.TextArea {
+        id: noteText
+        anchors.fill: parent
+        text: plasmoid.configuration.Text
+        onTextChanged: plasmoid.configuration.Text = text
+    }
+}

examples/applets/notes/metadata.desktop

@@ -0,0 +1,19 @@
+[Desktop Entry]
+Comment=Example on how to manage Drop data
+Encoding=UTF-8
+Keywords=
+Name=Example notes
+Type=Service
+Icon=knotes
+X-KDE-ParentApp=
+X-KDE-PluginInfo-Author=Marco Martin
+X-KDE-PluginInfo-Category=Miscellaneous
+X-KDE-PluginInfo-Email=mart@kde.org
+X-KDE-PluginInfo-License=GPL
+X-KDE-PluginInfo-Name=org.kde.example.notes
+X-KDE-PluginInfo-Version=
+X-KDE-PluginInfo-Website=
+X-KDE-ServiceTypes=Plasma/Applet
+X-Plasma-API=declarativeappletscript
+X-Plasma-MainScript=ui/main.qml
+X-Plasma-DropMimeTypes=text/plain

src/scriptengines/qml/plasmoid/appletinterface.h

@@ -281,6 +281,13 @@ public:
     qreal implicitHeight() const;
 
 Q_SIGNALS:
+    /**
+     * somebody else, usually the containment sent some data to the applet
+     * @param mimetype the mime type of the data such as text/plain
+     * @param data either the actual data or an URL representing it
+     */
+    void externalData(const QString &mimetype, const QVariant &data);
+
     void releaseVisualFocus();
     void configNeedsSaving();
 

src/scriptengines/qml/plasmoid/containmentinterface.cpp

@@ -220,25 +220,8 @@ void ContainmentInterface::setAppletArgs(Plasma::Applet *applet, const QString &
         return;
     }
 
-    KConfig argsConf(applet->package().filePath("config", "argsrc"));
-    foreach (const QString &group, argsConf.groupList()) {
-        KConfigGroup cg(&argsConf, group);
-        if (cg.hasKey(mimetype)) {
-            QString key = cg.readEntry(mimetype);
-
-            Plasma::ConfigLoader *config = applet->configScheme();
-            if (config) {
-                KConfigSkeletonItem *item = config->findItemByName(key);
-                if (item) {
-                    item->setProperty(data);
-                    config->blockSignals(true);
-                    config->writeConfig();
-                    config->blockSignals(false);
-                    m_appletScriptEngine->configNeedsSaving();
-                }
-            }
-        }
-    }
+    AppletInterface *appletInterface = applet->property("graphicObject").value<AppletInterface *>();
+    emit appletInterface->externalData(mimetype, data);
 }
 
 void ContainmentInterface::processMimeData(QMimeData *mimeData, int x, int y)