Sourcecode hierarchy cleanup: Move further files from src to src/views

svn path=/trunk/KDE/kdebase/apps/; revision=1154150

1 files changed, 89 insertions, 0 deletions

diff --git a/src/views/folderexpander.h b/src/views/folderexpander.h
new file mode 100644
index 000000000..63de57f4a
--- /dev/null
+++ b/src/views/folderexpander.h
@@ -0,0 +1,89 @@
+/***************************************************************************
+ *   Copyright (C) 2008 by Simon St James <[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 FOLDEREXPANDER_H
+#define FOLDEREXPANDER_H
+
+// Needs to be exported as FoldersPanel uses it.
+#include "libdolphin_export.h"
+
+#include <QObject>
+#include <QPoint>
+
+class QAbstractItemView;
+class QTreeView;
+class QTimer;
+class QSortFilterProxyModel;
+class QModelIndex;
+
+/**
+ * Grants auto expanding functionality to the provided item view.
+ * Qt has its own auto expand mechanism, but this works only
+ * for QTreeView. Auto expanding of folders is turned on
+ * per default.
+ *
+ * If the provided view is an instance of the class QTreeView, the
+ * expansion of the directory is automatically done on hover. Otherwise
+ * the enterDir() signal is emitted and the caller needs to ensure that
+ * the requested directory is entered.
+ *
+ * The FolderExpander becomes a child of the provided view.
+ */
+class LIBDOLPHINPRIVATE_EXPORT FolderExpander : public QObject
+{
+    Q_OBJECT
+
+public:
+    FolderExpander(QAbstractItemView* view, QSortFilterProxyModel* proxyModel);
+    virtual ~FolderExpander();
+
+    void setEnabled(bool enabled);
+    bool enabled() const;
+
+signals:
+    /**
+     * Is emitted if the directory \a dirModelIndex should be entered. The
+     * signal is not emitted when a QTreeView is used, as the entering of
+     * the directory is already provided by expanding the tree node.
+     */
+    void enterDir(const QModelIndex& dirModelIndex);
+
+
+private slots:
+    void viewScrolled();
+    void autoExpandTimeout();
+
+private:
+    bool m_enabled;
+
+    QAbstractItemView* m_view;
+    QSortFilterProxyModel* m_proxyModel;
+
+    QTimer* m_autoExpandTriggerTimer;
+    QPoint m_autoExpandPos;
+
+    static const int AUTO_EXPAND_DELAY = 700;
+
+    /**
+     * Watchs the drag/move events for the view to decide
+     * whether auto expanding of a folder should be triggered.
+     */
+    bool eventFilter(QObject* watched, QEvent* event);
+};
+#endif