put the thumbnail setting into PageItem as bookkeeping is helpful here

active/components/pageitem.cpp

@@ -335,4 +335,22 @@ void PageItem::contentYChanged()
     m_viewPort.rePos.normalizedY = m_flickable.data()->property("contentY").toReal();
 }
 
+void PageItem::setIsThumbnail(bool thumbnail)
+{
+    if (thumbnail == (m_observerId == THUMBNAILS_ID)) {
+        return;
+    }
+
+    m_observerId = thumbnail ? THUMBNAILS_ID : PAGEVIEW_ID;
+
+    if (thumbnail) {
+        m_smooth = false;
+    }
+
+    /*
+    m_redrawTimer->setInterval(thumbnail ? 0 : REDRAW_TIMEOUT);
+    m_redrawTimer->setSingleShot(true);
+    */
+}
+
 #include "pageitem.moc"

active/components/pageitem.h

@@ -129,13 +129,6 @@ public:
     void geometryChanged(const QRectF &newGeometry,
                          const QRectF &oldGeometry);
 
-private Q_SLOTS:
-    void delayedRedraw();
-    void pageHasChanged(int page, int flags);
-    void checkBookmarksChanged();
-    void contentXChanged();
-    void contentYChanged();
-
 Q_SIGNALS:
     void flickableChanged();
     void implicitWidthChanged();
@@ -145,6 +138,16 @@ Q_SIGNALS:
     void bookmarkedChanged();
     void bookmarksChanged();
 
+protected:
+    void setIsThumbnail(bool thumbnail);
+
+private Q_SLOTS:
+    void delayedRedraw();
+    void pageHasChanged(int page, int flags);
+    void checkBookmarksChanged();
+    void contentXChanged();
+    void contentYChanged();
+
 private:
     const Okular::Page *m_page;
     bool m_smooth;
@@ -155,7 +158,6 @@ private:
     int m_observerId;
     QWeakPointer <QDeclarativeItem> m_flickable;
     Okular::DocumentViewport m_viewPort;
-    friend class ThumbnailItem;
 };
 
 #endif

active/components/thumbnailitem.cpp

@@ -19,12 +19,10 @@
 
 #include "thumbnailitem.h"
 
-#include <core/observer.h>
-
 ThumbnailItem::ThumbnailItem(QDeclarativeItem *parent)
     : PageItem(parent)
 {
-    m_observerId = THUMBNAILS_ID;
+    setIsThumbnail(true);
 }