When navigating back/forward in the DolphinPart inside Konqueror, remember

1. the current item,
2. the scroll position of the view, and
3. the expansion state of the details view.

Before 3. can be implemented in Dolphin itself, some changes in
KUrlNavigator are required.

This fix will be in KDE 4.4.

BUG: 193549
BUG: 198073
BUG: 213137

svn path=/trunk/KDE/kdebase/apps/; revision=1049164

1 files changed, 77 insertions, 0 deletions

diff --git a/src/dolphindetailsviewexpander.h b/src/dolphindetailsviewexpander.h
new file mode 100644
index 000000000..b4dc2fc72
--- /dev/null
+++ b/src/dolphindetailsviewexpander.h
@@ -0,0 +1,77 @@
+/***************************************************************************
+ *   Copyright (C) 2009 by Frank Reininghaus ([email protected])    *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
+ ***************************************************************************/
+
+#ifndef DOLPHINDETAILSVIEWEXPANDER_H
+#define DOLPHINDETAILSVIEWEXPANDER_H
+
+#include <QObject>
+#include <QSet>
+#include <QList>
+
+class DolphinDetailsView;
+class KUrl;
+class KDirLister;
+class DolphinModel;
+class DolphinSortFilterProxyModel;
+
+/**
+ * @brief Expands a given set of subfolders in collaboration with the dir lister and the dir model.
+ *
+ * Note that only one subfolder can be expanded at a time. Each expansion triggers KDirLister::openUrl(...),
+ * and further expansions can only be done the next time the dir lister emits its completed() signal.
+ */
+class DolphinDetailsViewExpander : public QObject
+{
+    Q_OBJECT
+
+public:
+    explicit DolphinDetailsViewExpander(DolphinDetailsView* parent,
+                                        const QSet<KUrl>& urlsToExpand);
+
+    virtual ~DolphinDetailsViewExpander();
+
+    /**
+     * Stops the expansion and deletes the object via deleteLater().
+     */
+    void stop();
+
+private slots:
+    /**
+     * This slot is invoked every time the dir lister has completed a listing.
+     * It expands the first URL from the list m_urlsToExpand that can be found in the dir model.
+     * If the list is empty, stop() is called.
+     */
+    void slotDirListerCompleted();
+
+signals:
+    /**
+     * Is emitted when the expander has finished expanding URLs in the details view.
+     */
+    void completed();
+
+private:
+    QList<KUrl> m_urlsToExpand;
+
+    DolphinDetailsView* m_detailsView;
+    const KDirLister* m_dirLister;
+    const DolphinModel* m_dolphinModel;
+    const DolphinSortFilterProxyModel* m_proxyModel;
+};
+
+#endif