allow plasmoids to change icon

changing icon will change the icon of the default compact representation

src/plasma/applet.cpp

@@ -332,11 +332,12 @@ void Applet::setTitle(const QString &title) const
 
 QString Applet::icon() const
 {
-    if (!d->appletDescription.isValid()) {
-        return QString();
-    }
+    return d->icon;
+}
 
-    return d->appletDescription.icon();
+void Applet::setIcon(const QString &icon)
+{
+    d->icon = icon;
 }
 
 KPluginInfo Applet::pluginInfo() const

src/plasma/applet.h

@@ -282,10 +282,16 @@ class PLASMA_EXPORT Applet : public QObject
         static Applet *loadPlasmoid(const QString &path, uint appletId = 0);
 
         /**
-         * Returns the icon related to this applet
+         * @returns The icon name related to this applet
+         * By default is the one in the plasmoid desktop file
          **/
         QString icon() const;
 
+        /**
+         * Sets an icon name for this applet
+         * @param icon Freedesktop compatible icon name
+         */
+        void setIcon(const QString &icon);
 
 
 //ACTIONS

src/plasma/private/applet_p.cpp

@@ -52,6 +52,7 @@ AppletPrivate::AppletPrivate(KService::Ptr service, const KPluginInfo *info, int
           q(applet),
           immutability(Types::Mutable),
           appletDescription(info ? *info : KPluginInfo(service)),
+          icon(appletDescription.isValid() ? appletDescription.icon() : QString()),
           mainConfig(0),
           pendingConstraints(Types::NoConstraint),
           script(0),

src/plasma/private/applet_p.h

@@ -87,6 +87,7 @@ public:
     // applet info we keep around in case its needed
     KPluginInfo appletDescription;
     QString customTitle;
+    QString icon;
 
     // bookkeeping
     KConfigGroup *mainConfig;

src/scriptengines/qml/plasmoid/appletinterface.cpp

@@ -221,21 +221,31 @@ QObject* AppletInterface::configuration() const
     return m_configuration;
 }
 
+uint AppletInterface::id() const
+{
+    return applet()->id();
+}
+
 QString AppletInterface::icon() const
 {
     return applet()->icon();
 }
 
+void AppletInterface::setIcon(const QString &icon)
+{
+    if (applet()->icon() == icon) {
+        return;
+    }
+
+    applet()->setIcon(icon);
+    emit iconChanged();
+}
+
 QString AppletInterface::title() const
 {
     return applet()->title();
 }
 
-uint AppletInterface::id() const
-{
-    return applet()->id();
-}
-
 void AppletInterface::setTitle(const QString &title)
 {
     if (applet()->title() == title) {

src/scriptengines/qml/plasmoid/appletinterface.h

@@ -64,11 +64,10 @@ class AppletInterface : public QQuickItem
      */
     Q_PROPERTY(QString title READ title WRITE setTitle NOTIFY titleChanged)
 
-    //TODO: writable icon
     /**
      * Icon to represent the plasmoid
      */
-    Q_PROPERTY(QString icon READ icon CONSTANT)
+    Q_PROPERTY(QString icon READ icon WRITE setIcon NOTIFY iconChanged)
 
     /**
      * Applet id: is unique in the whole Plasma session and will never change across restarts
@@ -235,6 +234,7 @@ public:
 
 //PROPERTY ACCESSORS-------------------------------------------------------------------
     QString icon() const;
+    void setIcon(const QString &icon);
 
     QString title() const;
     void setTitle(const QString &title);
@@ -294,6 +294,7 @@ Q_SIGNALS:
     void configNeedsSaving();
 
 //PROPERTY change notifiers--------------
+    void iconChanged();
     void titleChanged();
     void formFactorChanged();
     void locationChanged();