Make it possible to choose wallpapers without config

Wallpapers don't necessarily have config UIs, so we need to take a bit
of care that we don't try to load them. Just hide the pagestack instead.

src/shell/qmlpackages/desktop/contents/components/ConfigCategoryDelegate.qml

@@ -31,23 +31,20 @@ MouseArea {
 //BEGIN properties
     width: childrenRect.width
     height: childrenRect.height
-    property bool current: main.sourceFile == model.source
+    property bool current: categoriesView.currentIndex == index
 //END properties
 
 //BEGIN connections
     onClicked: {
+        print("model source: " + model.source + " " + main.sourceFile);
         if (delegate.current) {
             return
         } else {
+            categoriesView.currentIndex = index;
             main.sourceFile = model.source
             root.restoreConfig()
         }
     }
-    onCurrentChanged: {
-        if (current) {
-            categoriesView.currentItem = delegate
-        }
-    }
 //END connections
 
 //BEGIN UI components

src/shell/qmlpackages/desktop/contents/components/Configuration.qml

@@ -85,8 +85,8 @@ Rectangle {
             main.sourceFile = globalConfigModel.get(0).source
         }
         root.restoreConfig()
-        root.width = mainColumn.implicitWidth
+//         root.width = mainColumn.implicitWidth
-        root.height = mainColumn.implicitHeight
+//         root.height = mainColumn.implicitHeight
     }
 //END connections
 
@@ -183,13 +183,14 @@ Rectangle {
                                 id: pageSizeSync
                                 interval: 100
                                 onTriggered: {
-                                    root.width = mainColumn.implicitWidth
+//                                     root.width = mainColumn.implicitWidth
-                                    root.height = mainColumn.implicitHeight
+//                                     root.height = mainColumn.implicitHeight
                                 }
                             }
                             onImplicitWidthChanged: pageSizeSync.restart()
                             onImplicitHeightChanged: pageSizeSync.restart()
                             onSourceFileChanged: {
+                                print("Source file changed in flickable" + sourceFile);
                                 replace(Qt.resolvedUrl(sourceFile))
                                 /*
                                  * This is not needed on a desktop shell that has ok/apply/cancel buttons, i'll leave it here only for future reference until we have a prototype for the active shell.

src/shell/qmlpackages/desktop/contents/components/ConfigurationContainmentAppearance.qml

@@ -18,11 +18,12 @@
 
 import QtQuick 2.0
 import org.kde.plasma.components 2.0 as PlasmaComponents
+import org.kde.plasma.extras 2.0 as PlasmaExtras
 import org.kde.plasma.configuration 2.0
 
 Column {
     id: root
-    PlasmaComponents.Label {
+    PlasmaExtras.Title {
         text: "Plugins"
     }
 
@@ -54,7 +55,7 @@ Column {
         }
         height: 100
         orientation: ListView.Horizontal 
-        
+
         model: configDialog.wallpaperConfigModel
         delegate: ConfigCategoryDelegate {
             id: delegate
@@ -67,14 +68,16 @@ Column {
             width: 64
             onClicked: {
                 configDialog.currentWallpaper = model.pluginName
-                if (delegate.current) {
+                if (categoriesView.currentIndex == index) {
                     return
                 } else {
+                    categoriesView.currentIndex = index;
                     main.sourceFile = model.source
                     root.restoreConfig()
                 }
             }
             onCurrentChanged: {
+                categoriesView.currentIndex = index
                 if (current) {
                     categoriesView.currentIndex = index
                 }
@@ -94,10 +97,10 @@ Column {
             interval: 100
             property variant pendingCurrent
             onTriggered: {
-                if (pendingCurrent) {
+                if (pendingCurrent && pen) {
+                    categoriesView.currentIndex = pendingCurrent.index
                     main.sourceFile = pendingCurrent.source
                     root.restoreConfig()
-                    categoriesView.currentIndex = pendingCurrent.index
                 }
             }
         }
@@ -109,9 +112,15 @@ Column {
         height: implicitHeight
         property string sourceFile
         onSourceFileChanged: {
-            replace(Qt.resolvedUrl(sourceFile))
+            if (sourceFile != "") {
-            root.width = mainColumn.implicitWidth
+                main.opacity = 1;
-            root.height = mainColumn.implicitHeight
+                replace(Qt.resolvedUrl(sourceFile))
+                root.width = mainColumn.implicitWidth
+                root.height = mainColumn.implicitHeight
+            } else {
+                main.opacity = 0
+            }
         }
+        Behavior on opacity { NumberAnimation {} }
     }
 }