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akonadi

progressspinnerdelegate_p.h
00001 /*
00002     Copyright (C) 2010 Klarälvdalens Datakonsult AB,
00003         a KDAB Group company, info@kdab.net,
00004         author Stephen Kelly <stephen@kdab.com>
00005 
00006     This library is free software; you can redistribute it and/or modify it
00007     under the terms of the GNU Library General Public License as published by
00008     the Free Software Foundation; either version 2 of the License, or (at your
00009     option) any later version.
00010 
00011     This library is distributed in the hope that it will be useful, but WITHOUT
00012     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
00013     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
00014     License for more details.
00015 
00016     You should have received a copy of the GNU Library General Public License
00017     along with this library; see the file COPYING.LIB.  If not, write to the
00018     Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
00019     02110-1301, USA.
00020 */
00021 
00022 #ifndef PROGRESSSPINNERDELEGATE_P_H
00023 #define PROGRESSSPINNERDELEGATE_P_H
00024 
00025 #include <QStyledItemDelegate>
00026 #include <QSet>
00027 
00028 #include <kpixmapsequence.h>
00029 
00030 namespace Akonadi {
00031 
00032 class DelegateAnimator : public QObject
00033 {
00034   Q_OBJECT
00035 public:
00036   DelegateAnimator(QAbstractItemView *view);
00037 
00038   void push(const QModelIndex &index) {
00039     if (m_animations.isEmpty())
00040       m_timerId = startTimer(200);
00041     m_animations.insert(Animation(index));
00042   }
00043   void pop(const QModelIndex &index) {
00044     m_animations.remove(Animation(index));
00045     if (m_animations.isEmpty() && m_timerId != -1) {
00046       killTimer(m_timerId);
00047       m_timerId = -1;
00048     }
00049   }
00050 
00051   QPixmap sequenceFrame(const QModelIndex &index);
00052 
00053   static const int sCount = 7;
00054   struct Animation {
00055       inline Animation(const QPersistentModelIndex &idx)
00056           : frame(0), index(idx)
00057       {
00058       }
00059 
00060       bool operator==(const Animation &other) const
00061       { return index == other.index; }
00062 
00063 
00064       inline void animate() const { frame = ( frame + 1 ) % sCount; }
00065       mutable int frame;
00066       QPersistentModelIndex index;
00067   };
00068 
00069 protected:
00070   virtual void timerEvent(QTimerEvent *event);
00071 
00072 private:
00073 
00074   mutable QSet<Animation> m_animations;
00075   QAbstractItemView *m_view;
00076   KPixmapSequence m_pixmapSequence;
00077   int m_timerId;
00078 };
00079 
00080 uint qHash(Akonadi::DelegateAnimator::Animation anim);
00081 
00085 class ProgressSpinnerDelegate : public QStyledItemDelegate
00086 {
00087   Q_OBJECT
00088 public:
00089   ProgressSpinnerDelegate(DelegateAnimator *animator, QObject* parent = 0);
00090 
00091 protected:
00092   virtual void initStyleOption(QStyleOptionViewItem* option, const QModelIndex& index) const;
00093 
00094 private:
00095   DelegateAnimator *m_animator;
00096 };
00097 
00098 }
00099 
00100 #endif

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