summaryrefslogtreecommitdiffstats
path: root/weather/src/carroussel.h
diff options
context:
space:
mode:
Diffstat (limited to 'weather/src/carroussel.h')
-rw-r--r--weather/src/carroussel.h156
1 files changed, 156 insertions, 0 deletions
diff --git a/weather/src/carroussel.h b/weather/src/carroussel.h
new file mode 100644
index 0000000..983cbc8
--- /dev/null
+++ b/weather/src/carroussel.h
@@ -0,0 +1,156 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: openBossa - INdT (renato.chencarek@openbossa.org)
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** the openBossa stream from INdT (renato.chencarek@openbossa.org).
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef __CARROUSSEL_H__
+#define __CARROUSSEL_H__
+
+#include <QList>
+#include <QDebug>
+
+
+template<class T> class Carroussel
+{
+public:
+ Carroussel() : m_pos(0) {}
+ ~Carroussel() {}
+ int count() const { return m_list.count(); }
+ int pos() const { return m_pos; }
+ void move(int offset) { m_pos = getIndex(m_pos + offset); }
+ int add(const T &item);
+ void remove(int idx);
+ T &operator[](int aIdx) { return m_list[getIndex(aIdx + m_pos)]; }
+ const T &operator[](int aIdx) const { return m_list[getIndex(aIdx + m_pos)]; }
+ void reset(const QList<T> &list, int newPos);
+private:
+ int m_pos;
+ QList<T> m_list;
+ int getIndex(int idx) const;
+ int getCarrousselIndex(int idx);
+};
+
+class CarrousselGroup
+{
+public:
+ inline ~CarrousselGroup();
+ template<class T> void add(T *carroussel);
+ inline void remove(void *carroussel);
+ inline void move(int offset);
+
+private:
+ class BasicCarrosselHandler
+ {
+ public:
+ virtual ~BasicCarrosselHandler() {}
+ virtual void move(int offset) = 0;
+ virtual bool isEqual(void *value) = 0;
+ };
+ template<class T> class CarrousselHandler : public BasicCarrosselHandler
+ {
+ public:
+ CarrousselHandler(T *carroussel) : m_carroussel(carroussel) {}
+ void move(int offset) { m_carroussel->move(offset); }
+ bool isEqual(void *value) { return m_carroussel == value; }
+ private:
+ T *m_carroussel;
+ };
+
+ QList<BasicCarrosselHandler*> m_items;
+ inline int find(void *value);
+};
+
+// Carroussel
+
+template<class T> int Carroussel<T>::add(const T &item)
+{
+ int idx = m_list.count() - m_pos;
+ m_list.append(item);
+ return idx <= m_list.count() / 2 ? idx : idx - m_list.count();
+}
+
+template<class T> void Carroussel<T>::remove(int idx)
+{
+ idx = getIndex(m_pos + idx);
+ m_list.removeAt(idx);
+ m_pos = getIndex(idx < m_pos ? m_pos - 1 : m_pos);
+}
+
+template<class T> void Carroussel<T>::reset(const QList<T> &list, int newPos)
+{
+ m_list = list;
+ m_pos = getIndex(newPos);
+}
+
+template<class T> int Carroussel<T>::getIndex(int idx) const
+{
+ if (m_list.count() == 0)
+ return 0;
+ idx %= m_list.count();
+ return idx >= 0 ? idx : m_list.count() + idx;
+}
+
+// CarrousselGroup
+
+CarrousselGroup::~CarrousselGroup()
+{
+ qDeleteAll(m_items);
+}
+
+template<class T> void CarrousselGroup::add(T *carroussel)
+{
+ if (find(carroussel) == -1)
+ m_items.append(new CarrousselHandler<T>(carroussel));
+}
+
+void CarrousselGroup::remove(void *carroussel)
+{
+ int idx = find(carroussel);
+ if (idx >= 0)
+ delete m_items.takeAt(idx);
+}
+
+int CarrousselGroup::find(void *value)
+{
+ for (int i = 0; i < m_items.count(); ++i)
+ if (m_items[i]->isEqual(value))
+ return i;
+ return -1;
+}
+
+void CarrousselGroup::move(int offset)
+{
+ foreach (BasicCarrosselHandler *handler, m_items)
+ handler->move(offset);
+}
+
+
+
+
+#endif /* __CARROUSSEL_H__ */