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authorOswald Buddenhagen <oswald.buddenhagen@qt.io>2017-10-06 11:49:09 +0000
committerOswald Buddenhagen <oswald.buddenhagen@qt.io>2017-10-06 16:58:43 +0200
commit07840524085bd1785b8f9142b03d942f678c5c51 (patch)
tree499c1674fdd1b3e0c07688d8e4e56748dfea2ca3 /src/Authoring/Studio/Utils/ITickTock.h
Initial import
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+/****************************************************************************
+**
+** Copyright (C) 2002 NVIDIA Corporation.
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt 3D Studio.
+**
+** $QT_BEGIN_LICENSE:GPL-EXCEPT$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#pragma once
+#ifndef ITICKTOCKH
+#define ITICKTOCKH
+
+namespace Q3DStudio {
+class CString;
+}
+
+namespace UICDM {
+class ISignalConnection;
+}
+
+QT_BEGIN_NAMESPACE
+class QWidget;
+QT_END_NAMESPACE
+
+typedef std::function<void()> TTickTockProc;
+
+namespace Q3DStudio {
+/**
+ * ITickTock is meant for a relatively small number of scheduled
+ * events that need to happen on the UI thread. Clients can cancel
+ * any event simply by releasing the returned shared pointer.
+ * Interface is completely threadsafe and the returned signal connection
+ * may safely outlive the interface.
+ */
+class ITickTock
+{
+protected:
+ virtual ~ITickTock() {}
+ static ITickTock *m_Instance;
+
+public:
+ // The timer is canceled if the shared ptr deletes the signal connection. Save to call from any
+ // thread.
+ // The callback, however, (inTickTockProc) will be activated solely from the UI thread.
+ virtual std::shared_ptr<UICDM::ISignalConnection>
+ AddTimer(unsigned long inTime, bool inIsPeriodic, TTickTockProc inTickTockProc,
+ const Q3DStudio::CString &inName) = 0;
+
+ // Called from UI thread to process all of the messages
+ // that have happened in the timer thread.
+ // Clients should not generally call this, it will be take care of for them.
+ // In the current implementation, MainFrm.h processes the tick tock message
+ // in order to call this function.
+ virtual void ProcessMessages() = 0;
+
+ friend class std::shared_ptr<ITickTock>;
+
+ // m_Instance is set to the first tick tock created, and unset when that tick tock
+ // goes away.
+ static std::shared_ptr<ITickTock> CreateTickTock(long inMessageID, QWidget* inTarget);
+
+ static ITickTock &GetInstance();
+};
+}
+
+#endif