Draw 10% opacity icon behind view, so as to give a better hint as to which list is which.

devices/synccollectionwidget.cpp

@@ -27,6 +27,7 @@
 #include "musiclibraryproxymodel.h"
 #include <KDE/KAction>
 #include <KDE/KLocale>
+#include <KDE/KIcon>
 
 SyncCollectionWidget::SyncCollectionWidget(QWidget *parent, const QString &title, const QString &action)
     : QWidget(parent)
@@ -53,6 +54,11 @@ SyncCollectionWidget::~SyncCollectionWidget()
 {
 }
 
+void SyncCollectionWidget::setIcon(const QString &iconName)
+{
+    tree->setPixmap(KIcon(iconName).pixmap(128, 128));
+}
+
 void SyncCollectionWidget::update(const QSet<Song> &songs)
 {
     model->update(songs);

devices/synccollectionwidget.h

@@ -39,6 +39,7 @@ public:
     SyncCollectionWidget(QWidget *parent, const QString &title, const QString &action);
     virtual ~SyncCollectionWidget();
 
+    void setIcon(const QString &iconName);
     void update(const QSet<Song> &songs);
     int numArtists();
 

devices/syncdialog.cpp

@@ -164,6 +164,10 @@ bool SyncDialog::updateSongs(bool showMessage)
     }
     devWidget->update(inDev);
     libWidget->update(inLib);
+    if (!isVisible()) {
+        devWidget->setIcon(dev->icon());
+        libWidget->setIcon("cantata-view-media-library");
+    }
     return true;
 }
 

widgets/treeview.cpp

@@ -23,6 +23,8 @@
 
 #include "treeview.h"
 #include <QtGui/QMouseEvent>
+#include <QtGui/QPaintEvent>
+#include <QtGui/QPainter>
 #include <QtCore/QMap>
 
 TreeView::TreeView(QWidget *parent)
@@ -126,3 +128,14 @@ void TreeView::correctSelection()
     setCurrentIndex(currentIndex());
     selectionModel()->select(s, QItemSelectionModel::SelectCurrent);
 }
+
+void TreeView::paintEvent(QPaintEvent *e)
+{
+    QTreeView::paintEvent(e);
+
+    if (!pixmap.isNull()) {
+        QPainter p(viewport());
+        p.setOpacity(0.1);
+        p.drawPixmap((width() - pixmap.width())/2, (height() - pixmap.height())/2, pixmap);
+    }
+}

widgets/treeview.h

@@ -25,6 +25,7 @@
 #define TREEVIEW_H
 
 #include <QtGui/QTreeView>
+#include <QtGui/QPixmap>
 
 class TreeView : public QTreeView
 {
@@ -44,12 +45,19 @@ public:
     void expandAll();
     void expand(const QModelIndex &idx);
     virtual void setModel(QAbstractItemModel *m);
+    void setPixmap(const QPixmap &pix) {
+        pixmap=pix;
+    }
+    void paintEvent(QPaintEvent *e);
 
 private Q_SLOTS:
     void correctSelection();
 
 Q_SIGNALS:
     bool itemsSelected(bool);
+
+private:
+    QPixmap pixmap;
 };
 
 #endif