Update previews when the preview-plugin settings have changed

Thanks to Janardhan Reddy for the initial patch.

BUG: 288726
FIXED-IN: 4.8.0

5 files changed, 49 insertions, 8 deletions

diff --git a/src/kitemviews/kfileitemlistview.cpp b/src/kitemviews/kfileitemlistview.cpp
index e2bde3b12..89fec9d0f 100644
--- a/src/kitemviews/kfileitemlistview.cpp
+++ b/src/kitemviews/kfileitemlistview.cpp
@@ -107,6 +107,18 @@ KFileItemListView::Layout KFileItemListView::itemLayout() const
     return m_itemLayout;
 }
 
+void KFileItemListView::setEnabledPlugins(const QStringList& list)
+{
+    if (m_modelRolesUpdater) {
+        m_modelRolesUpdater->setEnabledPlugins(list);
+    }
+}
+
+QStringList KFileItemListView::enabledPlugins() const
+{
+    return m_modelRolesUpdater ? m_modelRolesUpdater->enabledPlugins() : QStringList();
+}
+
 QSizeF KFileItemListView::itemSizeHint(int index) const
 {
     const QHash<QByteArray, QVariant> values = model()->data(index);
@@ -333,10 +345,7 @@ void KFileItemListView::onModelChanged(KItemModelBase* current, KItemModelBase*
     Q_UNUSED(previous);
     Q_ASSERT(qobject_cast<KFileItemModel*>(current));
 
-    if (m_modelRolesUpdater) {
-        delete m_modelRolesUpdater;
-    }
-
+    delete m_modelRolesUpdater;
     m_modelRolesUpdater = new KFileItemModelRolesUpdater(static_cast<KFileItemModel*>(current), this);
     const int size = styleOption().iconSize;
     m_modelRolesUpdater->setIconSize(QSize(size, size));
diff --git a/src/kitemviews/kfileitemlistview.h b/src/kitemviews/kfileitemlistview.h
index a41d091b7..203fb78c4 100644
--- a/src/kitemviews/kfileitemlistview.h
+++ b/src/kitemviews/kfileitemlistview.h
@@ -57,6 +57,23 @@ public:
     void setItemLayout(Layout layout);
     Layout itemLayout() const;
 
+    /**
+     * Sets the list of enabled thumbnail plugins that are used for previews.
+     * Per default all plugins enabled in the KConfigGroup "PreviewSettings"
+     * are used.
+     *
+     * For a list of available plugins, call KServiceTypeTrader::self()->query("ThumbCreator").
+     *
+     * @see enabledPlugins
+     */
+    void setEnabledPlugins(const QStringList& list);
+
+    /**
+     * Returns the list of enabled thumbnail plugins.
+     * @see setEnabledPlugins
+     */
+    QStringList enabledPlugins() const;
+
     /** @reimp */
     virtual QSizeF itemSizeHint(int index) const;
 
diff --git a/src/kitemviews/kfileitemmodelrolesupdater.cpp b/src/kitemviews/kfileitemmodelrolesupdater.cpp
index 4fe45624c..671352cac 100644
--- a/src/kitemviews/kfileitemmodelrolesupdater.cpp
+++ b/src/kitemviews/kfileitemmodelrolesupdater.cpp
@@ -169,7 +169,18 @@ bool KFileItemModelRolesUpdater::isPreviewShown() const
 
 void KFileItemModelRolesUpdater::setEnabledPlugins(const QStringList& list)
 {
+    if (m_enabledPlugins == list) {
+        return;
+    }
+
     m_enabledPlugins = list;
+    if (m_previewShown) {
+        if (m_paused) {
+            m_previewChangedDuringPausing = true;
+        } else {
+            sortAndResolveAllRoles();
+        }
+    }
 }
 
 void KFileItemModelRolesUpdater::setPaused(bool paused)
diff --git a/src/kitemviews/kfileitemmodelrolesupdater.h b/src/kitemviews/kfileitemmodelrolesupdater.h
index 993cc5244..065f069c8 100644
--- a/src/kitemviews/kfileitemmodelrolesupdater.h
+++ b/src/kitemviews/kfileitemmodelrolesupdater.h
@@ -82,13 +82,10 @@ public:
     QSet<QByteArray> roles() const;
 
     /**
-     * Sets the list of enabled thumbnail plugins.
+     * Sets the list of enabled thumbnail plugins that are used for previews.
      * Per default all plugins enabled in the KConfigGroup "PreviewSettings"
      * are used.
      *
-     * Note that this method doesn't cause already generated previews
-     * to be regenerated.
-     *
      * For a list of available plugins, call KServiceTypeTrader::self()->query("ThumbCreator").
      *
      * @see enabledPlugins
diff --git a/src/views/dolphinitemlistcontainer.cpp b/src/views/dolphinitemlistcontainer.cpp
index 870043bc4..9e7a15f74 100644
--- a/src/views/dolphinitemlistcontainer.cpp
+++ b/src/views/dolphinitemlistcontainer.cpp
@@ -176,6 +176,13 @@ void DolphinItemListContainer::refresh()
 
     updateFont();
     updateGridSize();
+
+    const KConfigGroup globalConfig(KGlobal::config(), "PreviewSettings");
+    const QStringList plugins = globalConfig.readEntry("Plugins", QStringList()
+                                                       << "directorythumbnail"
+                                                       << "imagethumbnail"
+                                                       << "jpegthumbnail");
+    m_fileItemListView->setEnabledPlugins(plugins);
 }
 
 void DolphinItemListContainer::updateGridSize()