prepare class to simplify keeping binary compatibility

svn path=/trunk/KDE/kdebase/apps/; revision=863339

diff --git a/src/kfilepreviewgenerator.cpp b/src/kfilepreviewgenerator.cpp
index b55f60516b27614415068f261d1c5e5e24ab2c63..f614aae63740f126f2914139efb4fd27d39e635d 100644 (file)
--- a/src/kfilepreviewgenerator.cpp
+++ b/src/kfilepreviewgenerator.cpp
@@ -80,13 +80,153 @@ private:
     QListView* m_view;
 };
 
     QListView* m_view;
 };
 

-KFilePreviewGenerator::KFilePreviewGenerator(QAbstractItemView* parent, KDirSortFilterProxyModel* model) :
-    QObject(parent),
+class KFilePreviewGenerator::Private
+{
+public:
+    Private(KFilePreviewGenerator* parent,
+            QAbstractItemView* view,
+            KDirSortFilterProxyModel* model);
+    ~Private();
+    
+    /**
+     * Generates previews for the items \a items asynchronously.
+     */
+    void generatePreviews(const KFileItemList& items);
+
+    /**
+     * Adds the preview \a pixmap for the item \a item to the preview
+     * queue and starts a timer which will dispatch the preview queue
+     * later.
+     */
+    void addToPreviewQueue(const KFileItem& item, const QPixmap& pixmap);
+
+    /**
+     * Is invoked when the preview job has been finished and
+     * removes the job from the m_previewJobs list.
+     */
+    void slotPreviewJobFinished(KJob* job);
+
+    /** Synchronizes the item icon with the clipboard of cut items. */
+    void updateCutItems();
+
+    /**
+     * Dispatches the preview queue  block by block within
+     * time slices.
+     */
+    void dispatchPreviewQueue();
+
+    /**
+     * Pauses all preview jobs and invokes KFilePreviewGenerator::resumePreviews()
+     * after a short delay. Is invoked as soon as the user has moved
+     * a scrollbar.
+     */
+    void pausePreviews();
+
+    /**
+     * Resumes the previews that have been paused after moving the
+     * scrollbar. The previews for the current visible area are
+     * generated first.
+     */
+    void resumePreviews();
+    
+    /**
+     * Returns true, if the item \a item has been cut into
+     * the clipboard.
+     */
+    bool isCutItem(const KFileItem& item) const;
+
+    /** Applies an item effect to all cut items. */
+    void applyCutItemEffect();
+
+    /**
+     * Applies a frame around the icon. False is returned if
+     * no frame has been added because the icon is too small.
+     */
+    bool applyImageFrame(QPixmap& icon);
+
+    /**
+     * Resizes the icon to \a maxSize if the icon size does not
+     * fit into the maximum size. The aspect ratio of the icon
+     * is kept.
+     */
+    void limitToSize(QPixmap& icon, const QSize& maxSize);
+
+    /**
+     * Starts a new preview job for the items \a to m_previewJobs
+     * and triggers the preview timer.
+     */
+    void startPreviewJob(const KFileItemList& items);
+
+    /** Kills all ongoing preview jobs. */
+    void killPreviewJobs();
+
+    /**
+     * Orders the items \a items in a way that the visible items
+     * are moved to the front of the list. When passing this
+     * list to a preview job, the visible items will get generated
+     * first.
+     */
+    void orderItems(KFileItemList& items);
+    
+    /** Remembers the pixmap for an item specified by an URL. */
+    struct ItemInfo
+    {
+        KUrl url;
+        QPixmap pixmap;
+    };
+
+    bool m_showPreview;
+
+    /**
+     * True, if m_pendingItems and m_dispatchedItems should be
+     * cleared when the preview jobs have been finished.
+     */
+    bool m_clearItemQueues;
+
+    /**
+     * True if a selection has been done which should cut items.
+     */
+    bool m_hasCutSelection;
+
+    int m_pendingVisiblePreviews;
+
+    QAbstractItemView* m_view;
+    QTimer* m_previewTimer;
+    QTimer* m_scrollAreaTimer;
+    QList<KJob*> m_previewJobs;
+    KDirModel* m_dirModel;
+    KDirSortFilterProxyModel* m_proxyModel;
+
+    KMimeTypeResolver* m_mimeTypeResolver;
+
+    QList<ItemInfo> m_cutItemsCache;
+    QList<ItemInfo> m_previews;
+
+    /**
+     * Contains all items where a preview must be generated, but
+     * where the preview job has not dispatched the items yet.
+     */
+    KFileItemList m_pendingItems;
+
+    /**
+     * Contains all items, where a preview has already been
+     * generated by the preview jobs.
+     */
+    KFileItemList m_dispatchedItems;
+    
+private:
+    KFilePreviewGenerator* const q;
+
+};
+
+KFilePreviewGenerator::Private::Private(KFilePreviewGenerator* parent,
+                                        QAbstractItemView* view,
+                                        KDirSortFilterProxyModel* model) :

     m_showPreview(true),
     m_clearItemQueues(true),
     m_hasCutSelection(false),
     m_pendingVisiblePreviews(0),
     m_showPreview(true),
     m_clearItemQueues(true),
     m_hasCutSelection(false),
     m_pendingVisiblePreviews(0),

-    m_view(parent),
+    m_view(view),

     m_previewTimer(0),
     m_scrollAreaTimer(0),
     m_previewJobs(),
     m_previewTimer(0),
     m_scrollAreaTimer(0),
     m_previewJobs(),


@@ -96,7 +236,8 @@ KFilePreviewGenerator::KFilePreviewGenerator(QAbstractItemView* parent, KDirSort
     m_cutItemsCache(),
     m_previews(),
     m_pendingItems(),
     m_cutItemsCache(),
     m_previews(),
     m_pendingItems(),

-    m_dispatchedItems()
+    m_dispatchedItems(),
+    q(parent)

 {
     if (!m_view->iconSize().isValid()) {
         m_showPreview = false;
 {
     if (!m_view->iconSize().isValid()) {
         m_showPreview = false;


@@ -104,33 +245,33 @@ KFilePreviewGenerator::KFilePreviewGenerator(QAbstractItemView* parent, KDirSort
 
     m_dirModel = static_cast<KDirModel*>(m_proxyModel->sourceModel());
     connect(m_dirModel->dirLister(), SIGNAL(newItems(const KFileItemList&)),
 
     m_dirModel = static_cast<KDirModel*>(m_proxyModel->sourceModel());
     connect(m_dirModel->dirLister(), SIGNAL(newItems(const KFileItemList&)),

-            this, SLOT(generatePreviews(const KFileItemList&)));
+            q, SLOT(generatePreviews(const KFileItemList&)));

 
     QClipboard* clipboard = QApplication::clipboard();
     connect(clipboard, SIGNAL(dataChanged()),
 
     QClipboard* clipboard = QApplication::clipboard();
     connect(clipboard, SIGNAL(dataChanged()),

-            this, SLOT(updateCutItems()));
+            q, SLOT(updateCutItems()));

 
 

-    m_previewTimer = new QTimer(this);
+    m_previewTimer = new QTimer(q);

     m_previewTimer->setSingleShot(true);
     m_previewTimer->setSingleShot(true);

-    connect(m_previewTimer, SIGNAL(timeout()), this, SLOT(dispatchPreviewQueue()));
+    connect(m_previewTimer, SIGNAL(timeout()), q, SLOT(dispatchPreviewQueue()));

 
     // Whenever the scrollbar values have been changed, the pending previews should
     // be reordered in a way that the previews for the visible items are generated
     // first. The reordering is done with a small delay, so that during moving the
     // scrollbars the CPU load is kept low.
 
     // Whenever the scrollbar values have been changed, the pending previews should
     // be reordered in a way that the previews for the visible items are generated
     // first. The reordering is done with a small delay, so that during moving the
     // scrollbars the CPU load is kept low.

-    m_scrollAreaTimer = new QTimer(this);
+    m_scrollAreaTimer = new QTimer(q);

     m_scrollAreaTimer->setSingleShot(true);
     m_scrollAreaTimer->setInterval(200);
     connect(m_scrollAreaTimer, SIGNAL(timeout()),
     m_scrollAreaTimer->setSingleShot(true);
     m_scrollAreaTimer->setInterval(200);
     connect(m_scrollAreaTimer, SIGNAL(timeout()),

-            this, SLOT(resumePreviews()));
+            q, SLOT(resumePreviews()));

     connect(m_view->horizontalScrollBar(), SIGNAL(valueChanged(int)),
     connect(m_view->horizontalScrollBar(), SIGNAL(valueChanged(int)),

-            this, SLOT(pausePreviews()));
+            q, SLOT(pausePreviews()));

     connect(m_view->verticalScrollBar(), SIGNAL(valueChanged(int)),
     connect(m_view->verticalScrollBar(), SIGNAL(valueChanged(int)),

-            this, SLOT(pausePreviews()));
+            q, SLOT(pausePreviews()));

 }
 
 }
 

-KFilePreviewGenerator::~KFilePreviewGenerator()
-{
+KFilePreviewGenerator::Private::~Private()
+{        

     killPreviewJobs();
     m_pendingItems.clear();
     m_dispatchedItems.clear();
     killPreviewJobs();
     m_pendingItems.clear();
     m_dispatchedItems.clear();


@@ -140,66 +281,7 @@ KFilePreviewGenerator::~KFilePreviewGenerator()
     }
 }
 
     }
 }
 

-void KFilePreviewGenerator::setShowPreview(bool show)
-{
-    if (show && !m_view->iconSize().isValid()) {
-        // the view must provide an icon size, otherwise the showing
-        // off previews will get ignored
-        return;
-    }
-    
-    if (m_showPreview != show) {
-        m_showPreview = show;
-        m_cutItemsCache.clear();
-        updateCutItems();
-        if (show) {
-            updatePreviews();
-        }
-    }
-
-    if (show && (m_mimeTypeResolver != 0)) {
-        // don't resolve the MIME types if the preview is turned on
-        m_mimeTypeResolver->deleteLater();
-        m_mimeTypeResolver = 0;
-    } else if (!show && (m_mimeTypeResolver == 0)) {
-        // the preview is turned off: resolve the MIME-types so that
-        // the icons gets updated
-        m_mimeTypeResolver = new KMimeTypeResolver(m_view, m_dirModel);
-    }
-}
-
-void KFilePreviewGenerator::updatePreviews()
-{
-    if (!m_showPreview) {
-        return;
-    }
-
-    killPreviewJobs();
-    m_cutItemsCache.clear();
-    m_pendingItems.clear();
-    m_dispatchedItems.clear();
-
-    KFileItemList itemList;
-    const int rowCount = m_dirModel->rowCount();
-    for (int row = 0; row < rowCount; ++row) {
-        const QModelIndex index = m_dirModel->index(row, 0);
-        KFileItem item = m_dirModel->itemForIndex(index);
-        itemList.append(item);
-    }
-
-    generatePreviews(itemList);
-    updateCutItems();
-}
-
-void KFilePreviewGenerator::cancelPreviews()
-{
-    killPreviewJobs();
-    m_cutItemsCache.clear();
-    m_pendingItems.clear();
-    m_dispatchedItems.clear();
-}
-
-void KFilePreviewGenerator::generatePreviews(const KFileItemList& items)
+void KFilePreviewGenerator::Private::generatePreviews(const KFileItemList& items)

 {
     applyCutItemEffect();
 
 {
     applyCutItemEffect();
 


@@ -217,7 +299,7 @@ void KFilePreviewGenerator::generatePreviews(const KFileItemList& items)
     startPreviewJob(orderedItems);
 }
 
     startPreviewJob(orderedItems);
 }
 

-void KFilePreviewGenerator::addToPreviewQueue(const KFileItem& item, const QPixmap& pixmap)
+void KFilePreviewGenerator::Private::addToPreviewQueue(const KFileItem& item, const QPixmap& pixmap)

 {
     if (!m_showPreview) {
         // the preview has been canceled in the meantime
 {
     if (!m_showPreview) {
         // the preview has been canceled in the meantime


@@ -278,7 +360,7 @@ void KFilePreviewGenerator::addToPreviewQueue(const KFileItem& item, const QPixm
     m_dispatchedItems.append(item);
 }
 
     m_dispatchedItems.append(item);
 }
 

-void KFilePreviewGenerator::slotPreviewJobFinished(KJob* job)
+void KFilePreviewGenerator::Private::slotPreviewJobFinished(KJob* job)

 {
     const int index = m_previewJobs.indexOf(job);
     m_previewJobs.removeAt(index);
 {
     const int index = m_previewJobs.indexOf(job);
     m_previewJobs.removeAt(index);


@@ -287,11 +369,11 @@ void KFilePreviewGenerator::slotPreviewJobFinished(KJob* job)
         m_pendingItems.clear();
         m_dispatchedItems.clear();
         m_pendingVisiblePreviews = 0;
         m_pendingItems.clear();
         m_dispatchedItems.clear();
         m_pendingVisiblePreviews = 0;

-        QMetaObject::invokeMethod(this, "dispatchPreviewQueue", Qt::QueuedConnection);
+        QMetaObject::invokeMethod(q, "dispatchPreviewQueue", Qt::QueuedConnection);

     }
 }
 
     }
 }
 

-void KFilePreviewGenerator::updateCutItems()
+void KFilePreviewGenerator::Private::updateCutItems()

 {
     // restore the icons of all previously selected items to the
     // original state...
 {
     // restore the icons of all previously selected items to the
     // original state...


@@ -307,7 +389,7 @@ void KFilePreviewGenerator::updateCutItems()
     applyCutItemEffect();
 }
 
     applyCutItemEffect();
 }
 

-void KFilePreviewGenerator::dispatchPreviewQueue()
+void KFilePreviewGenerator::Private::dispatchPreviewQueue()

 {
     const int previewsCount = m_previews.count();
     if (previewsCount > 0) {
 {
     const int previewsCount = m_previews.count();
     if (previewsCount > 0) {


@@ -339,7 +421,7 @@ void KFilePreviewGenerator::dispatchPreviewQueue()
     }
 }
 
     }
 }
 

-void KFilePreviewGenerator::pausePreviews()
+void KFilePreviewGenerator::Private::pausePreviews()

 {
     foreach (KJob* job, m_previewJobs) {
         Q_ASSERT(job != 0);
 {
     foreach (KJob* job, m_previewJobs) {
         Q_ASSERT(job != 0);


@@ -348,7 +430,7 @@ void KFilePreviewGenerator::pausePreviews()
     m_scrollAreaTimer->start();
 }
 
     m_scrollAreaTimer->start();
 }
 

-void KFilePreviewGenerator::resumePreviews()
+void KFilePreviewGenerator::Private::resumePreviews()

 {
     // Before creating new preview jobs the m_pendingItems queue must be
     // cleaned up by removing the already dispatched items. Implementation
 {
     // Before creating new preview jobs the m_pendingItems queue must be
     // cleaned up by removing the already dispatched items. Implementation


@@ -385,7 +467,7 @@ void KFilePreviewGenerator::resumePreviews()
     startPreviewJob(orderedItems);
 }
 
     startPreviewJob(orderedItems);
 }
 

-bool KFilePreviewGenerator::isCutItem(const KFileItem& item) const
+bool KFilePreviewGenerator::Private::isCutItem(const KFileItem& item) const

 {
     const QMimeData* mimeData = QApplication::clipboard()->mimeData();
     const KUrl::List cutUrls = KUrl::List::fromMimeData(mimeData);
 {
     const QMimeData* mimeData = QApplication::clipboard()->mimeData();
     const KUrl::List cutUrls = KUrl::List::fromMimeData(mimeData);


@@ -400,7 +482,7 @@ bool KFilePreviewGenerator::isCutItem(const KFileItem& item) const
     return false;
 }
 
     return false;
 }
 

-void KFilePreviewGenerator::applyCutItemEffect()
+void KFilePreviewGenerator::Private::applyCutItemEffect()

 {
     const QMimeData* mimeData = QApplication::clipboard()->mimeData();
     m_hasCutSelection = KonqMimeData::decodeIsCutSelection(mimeData);
 {
     const QMimeData* mimeData = QApplication::clipboard()->mimeData();
     m_hasCutSelection = KonqMimeData::decodeIsCutSelection(mimeData);


@@ -440,7 +522,7 @@ void KFilePreviewGenerator::applyCutItemEffect()
     }
 }
 
     }
 }
 

-bool KFilePreviewGenerator::applyImageFrame(QPixmap& icon)
+bool KFilePreviewGenerator::Private::applyImageFrame(QPixmap& icon)

 {
     const QSize maxSize = m_view->iconSize();
     const bool applyFrame = (maxSize.width()  > KIconLoader::SizeSmallMedium) &&
 {
     const QSize maxSize = m_view->iconSize();
     const bool applyFrame = (maxSize.width()  > KIconLoader::SizeSmallMedium) &&


@@ -490,14 +572,14 @@ bool KFilePreviewGenerator::applyImageFrame(QPixmap& icon)
     return true;
 }
 
     return true;
 }
 

-void KFilePreviewGenerator::limitToSize(QPixmap& icon, const QSize& maxSize)
+void KFilePreviewGenerator::Private::limitToSize(QPixmap& icon, const QSize& maxSize)

 {
     if ((icon.width() > maxSize.width()) || (icon.height() > maxSize.height())) {
         icon = icon.scaled(maxSize, Qt::KeepAspectRatio, Qt::FastTransformation);
     }
 }
 
 {
     if ((icon.width() > maxSize.width()) || (icon.height() > maxSize.height())) {
         icon = icon.scaled(maxSize, Qt::KeepAspectRatio, Qt::FastTransformation);
     }
 }
 

-void KFilePreviewGenerator::startPreviewJob(const KFileItemList& items)
+void KFilePreviewGenerator::Private::startPreviewJob(const KFileItemList& items)

 {
     if (items.count() == 0) {
         return;
 {
     if (items.count() == 0) {
         return;


@@ -516,15 +598,15 @@ void KFilePreviewGenerator::startPreviewJob(const KFileItemList& items)
     const int cacheSize = (size.width() > 128) || (size.height() > 128) ? 256 : 128;
     KIO::PreviewJob* job = KIO::filePreview(items, cacheSize, cacheSize);
     connect(job, SIGNAL(gotPreview(const KFileItem&, const QPixmap&)),
     const int cacheSize = (size.width() > 128) || (size.height() > 128) ? 256 : 128;
     KIO::PreviewJob* job = KIO::filePreview(items, cacheSize, cacheSize);
     connect(job, SIGNAL(gotPreview(const KFileItem&, const QPixmap&)),

-            this, SLOT(addToPreviewQueue(const KFileItem&, const QPixmap&)));
+            q, SLOT(addToPreviewQueue(const KFileItem&, const QPixmap&)));

     connect(job, SIGNAL(finished(KJob*)),
     connect(job, SIGNAL(finished(KJob*)),

-            this, SLOT(slotPreviewJobFinished(KJob*)));
+            q, SLOT(slotPreviewJobFinished(KJob*)));

 
     m_previewJobs.append(job);
     m_previewTimer->start(200);
 }
 
 
     m_previewJobs.append(job);
     m_previewTimer->start(200);
 }
 

-void KFilePreviewGenerator::killPreviewJobs()
+void KFilePreviewGenerator::Private::killPreviewJobs()

 {
     foreach (KJob* job, m_previewJobs) {
         Q_ASSERT(job != 0);
 {
     foreach (KJob* job, m_previewJobs) {
         Q_ASSERT(job != 0);


@@ -533,7 +615,7 @@ void KFilePreviewGenerator::killPreviewJobs()
     m_previewJobs.clear();
 }
 
     m_previewJobs.clear();
 }
 

-void KFilePreviewGenerator::orderItems(KFileItemList& items)
+void KFilePreviewGenerator::Private::orderItems(KFileItemList& items)

 {
     // Order the items in a way that the preview for the visible items
     // is generated first, as this improves the feeled performance a lot.
 {
     // Order the items in a way that the preview for the visible items
     // is generated first, as this improves the feeled performance a lot.


@@ -601,4 +683,79 @@ void KFilePreviewGenerator::orderItems(KFileItemList& items)
     }
 }
 
     }
 }
 

+KFilePreviewGenerator::KFilePreviewGenerator(QAbstractItemView* parent, KDirSortFilterProxyModel* model) :
+    QObject(parent),
+    d(new Private(this, parent, model))
+{
+}
+
+KFilePreviewGenerator::~KFilePreviewGenerator()
+{
+    delete d;
+}
+
+void KFilePreviewGenerator::setShowPreview(bool show)
+{
+    if (show && !d->m_view->iconSize().isValid()) {
+        // the view must provide an icon size, otherwise the showing
+        // off previews will get ignored
+        return;
+    }
+    
+    if (d->m_showPreview != show) {
+        d->m_showPreview = show;
+        d->m_cutItemsCache.clear();
+        d->updateCutItems();
+        if (show) {
+            updatePreviews();
+        }
+    }
+
+    if (show && (d->m_mimeTypeResolver != 0)) {
+        // don't resolve the MIME types if the preview is turned on
+        d->m_mimeTypeResolver->deleteLater();
+        d->m_mimeTypeResolver = 0;
+    } else if (!show && (d->m_mimeTypeResolver == 0)) {
+        // the preview is turned off: resolve the MIME-types so that
+        // the icons gets updated
+        d->m_mimeTypeResolver = new KMimeTypeResolver(d->m_view, d->m_dirModel);
+    }
+}
+
+bool KFilePreviewGenerator::showPreview() const
+{
+    return d->m_showPreview;
+}
+
+void KFilePreviewGenerator::updatePreviews()
+{
+    if (!d->m_showPreview) {
+        return;
+    }
+
+    d->killPreviewJobs();
+    d->m_cutItemsCache.clear();
+    d->m_pendingItems.clear();
+    d->m_dispatchedItems.clear();
+
+    KFileItemList itemList;
+    const int rowCount = d->m_dirModel->rowCount();
+    for (int row = 0; row < rowCount; ++row) {
+        const QModelIndex index = d->m_dirModel->index(row, 0);
+        KFileItem item = d->m_dirModel->itemForIndex(index);
+        itemList.append(item);
+    }
+
+    d->generatePreviews(itemList);
+    d->updateCutItems();
+}
+
+void KFilePreviewGenerator::cancelPreviews()
+{
+    d->killPreviewJobs();
+    d->m_cutItemsCache.clear();
+    d->m_pendingItems.clear();
+    d->m_dispatchedItems.clear();
+}
+

 #include "kfilepreviewgenerator.moc"
 #include "kfilepreviewgenerator.moc"

diff --git a/src/kfilepreviewgenerator.h b/src/kfilepreviewgenerator.h
index 6d720fefce00f05fffa0327b19ae3890de7bf015..67f26a7e7952e413d2d84eb3829ab7081e2040c4 100644 (file)
--- a/src/kfilepreviewgenerator.h
+++ b/src/kfilepreviewgenerator.h
@@ -84,139 +84,18 @@ public:
     /** Cancels all pending previews. */
     void cancelPreviews();
 
     /** Cancels all pending previews. */
     void cancelPreviews();
 

-private slots:
-    /**
-     * Generates previews for the items \a items asynchronously.
-     */
-    void generatePreviews(const KFileItemList& items);
-
-    /**
-     * Adds the preview \a pixmap for the item \a item to the preview
-     * queue and starts a timer which will dispatch the preview queue
-     * later.
-     */
-    void addToPreviewQueue(const KFileItem& item, const QPixmap& pixmap);
-
-    /**
-     * Is invoked when the preview job has been finished and
-     * removes the job from the m_previewJobs list.
-     */
-    void slotPreviewJobFinished(KJob* job);
-
-    /** Synchronizes the item icon with the clipboard of cut items. */
-    void updateCutItems();
-
-    /**
-     * Dispatches the preview queue  block by block within
-     * time slices.
-     */
-    void dispatchPreviewQueue();
-
-    /**
-     * Pauses all preview jobs and invokes KFilePreviewGenerator::resumePreviews()
-     * after a short delay. Is invoked as soon as the user has moved
-     * a scrollbar.
-     */
-    void pausePreviews();
-
-    /**
-     * Resumes the previews that have been paused after moving the
-     * scrollbar. The previews for the current visible area are
-     * generated first.
-     */
-    void resumePreviews();
-

 private:
 private:

-    /**
-     * Returns true, if the item \a item has been cut into
-     * the clipboard.
-     */
-    bool isCutItem(const KFileItem& item) const;
-
-    /** Applies an item effect to all cut items. */
-    void applyCutItemEffect();
-
-    /**
-     * Applies a frame around the icon. False is returned if
-     * no frame has been added because the icon is too small.
-     */
-    bool applyImageFrame(QPixmap& icon);
-
-    /**
-     * Resizes the icon to \a maxSize if the icon size does not
-     * fit into the maximum size. The aspect ratio of the icon
-     * is kept.
-     */
-    void limitToSize(QPixmap& icon, const QSize& maxSize);
-
-    /**
-     * Starts a new preview job for the items \a to m_previewJobs
-     * and triggers the preview timer.
-     */
-    void startPreviewJob(const KFileItemList& items);
-
-    /** Kills all ongoing preview jobs. */
-    void killPreviewJobs();
-
-    /**
-     * Orders the items \a items in a way that the visible items
-     * are moved to the front of the list. When passing this
-     * list to a preview job, the visible items will get generated
-     * first.
-     */
-    void orderItems(KFileItemList& items);
-
-private:
-    /** Remembers the pixmap for an item specified by an URL. */
-    struct ItemInfo
-    {
-        KUrl url;
-        QPixmap pixmap;
-    };
-
-    bool m_showPreview;
-
-    /**
-     * True, if m_pendingItems and m_dispatchedItems should be
-     * cleared when the preview jobs have been finished.
-     */
-    bool m_clearItemQueues;
-
-    /**
-     * True if a selection has been done which should cut items.
-     */
-    bool m_hasCutSelection;
-
-    int m_pendingVisiblePreviews;
-
-    QAbstractItemView* m_view;
-    QTimer* m_previewTimer;
-    QTimer* m_scrollAreaTimer;
-    QList<KJob*> m_previewJobs;
-    KDirModel* m_dirModel;
-    KDirSortFilterProxyModel* m_proxyModel;
-
-    KMimeTypeResolver* m_mimeTypeResolver;
-
-    QList<ItemInfo> m_cutItemsCache;
-    QList<ItemInfo> m_previews;
-
-    /**
-     * Contains all items where a preview must be generated, but
-     * where the preview job has not dispatched the items yet.
-     */
-    KFileItemList m_pendingItems;
-
-    /**
-     * Contains all items, where a preview has already been
-     * generated by the preview jobs.
-     */
-    KFileItemList m_dispatchedItems;
+    class Private;
+    Private* const d; /// @internal
+    Q_DISABLE_COPY(KFilePreviewGenerator)
+    
+    Q_PRIVATE_SLOT(d, void generatePreviews(const KFileItemList&))
+    Q_PRIVATE_SLOT(d, void addToPreviewQueue(const KFileItem&, const QPixmap&))
+    Q_PRIVATE_SLOT(d, void slotPreviewJobFinished(KJob*))
+    Q_PRIVATE_SLOT(d, void updateCutItems())
+    Q_PRIVATE_SLOT(d, void dispatchPreviewQueue())
+    Q_PRIVATE_SLOT(d, void pausePreviews())
+    Q_PRIVATE_SLOT(d, void resumePreviews())

 };
 
 };
 

-inline bool KFilePreviewGenerator::showPreview() const
-{
-    return m_showPreview;
-}
-

 #endif
 #endif