Sourcecode hierarchy cleanup: Move folders "tooltips" and "versioncontrol" into "views"

svn path=/trunk/KDE/kdebase/apps/; revision=1154151

1 files changed, 83 insertions, 0 deletions

diff --git a/src/views/versioncontrol/pendingthreadsmaintainer.h b/src/views/versioncontrol/pendingthreadsmaintainer.h
new file mode 100644
index 000000000..342cb421d
--- /dev/null
+++ b/src/views/versioncontrol/pendingthreadsmaintainer.h
@@ -0,0 +1,83 @@
+/***************************************************************************
+ *   Copyright (C) 2010 by Peter Penz <[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 PENDINGTHREADSMAINTAINER_H
+#define PENDINGTHREADSMAINTAINER_H
+
+#include <libdolphin_export.h>
+
+#include <QObject>
+
+class QTimer;
+
+/**
+ * If the creator of a thread gets deleted, although the thread is still
+ * working, usually QThread::wait() is invoked. The drawback of this
+ * approach is that the user interface gets blocked for an undefined amount
+ * of time. If the thread does not contain references to the creator, the
+ * deleting can be forwarded to the PendingThreadsMaintainer. In the following
+ * example it is assumed, that m_thread will be 0, if it has been deleted by the
+ * creator after receiving the signal QThread::finished():
+ *
+ * \code
+ * ThreadCreator::~ThreadCreator()
+ * {
+ *     if (m_thread != 0) {
+ *         PendingThreadsMaintainer::instance().append(m_thread);
+ *         m_thread = 0;
+ *     }
+ * }
+ * \endcode
+ *
+ * The thread will get automatically deleted after it (or has already) been finished.
+ *
+ * Implementation note: Connecting to the signal QThread::finished() is
+ * not sufficient, as it is possible that the thread has already emitted
+ * the signal, but the signal has not been received yet by the thread creator.
+ * Because of this a polling is done each 5 seconds to check, whether the
+ * thread has been finished.
+ */
+class LIBDOLPHINPRIVATE_EXPORT PendingThreadsMaintainer : public QObject
+{
+    Q_OBJECT
+
+public:
+    static PendingThreadsMaintainer& instance();
+    virtual ~PendingThreadsMaintainer();
+
+    /**
+     * Appends the thread \p thread to the maintainer. The thread
+     * will be deleted by the maintainer after it has been finished.
+     */
+    void append(QThread* thread);
+
+protected:
+    PendingThreadsMaintainer();
+
+private slots:
+    void cleanup();
+
+private:
+    QList<QThread*> m_threads;
+    QTimer* m_timer;
+
+    friend class PendingThreadsMaintainerSingleton;
+};
+
+#endif