knewsticker/newsscroller.h

   1 /*
   2  * newsscroller.h
   3  *
   4  * Copyright (c) 2000, 2001 Frerich Raabe <raabe@kde.org>
   5  * Copyright (c) 2001 Malte Starostik <malte@kde.org>
   6  *
   7  * This program is distributed in the hope that it will be useful, but WITHOUT
   8  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
   9  * FOR A PARTICULAR PURPOSE. For licensing and distribution details, check the
  10  * accompanying file 'COPYING'.
  11  */
  12 #ifndef NEWSSCROLLER_H
  13 #define NEWSSCROLLER_H
  14
  15 #include "configaccess.h"
  16 #include "newsengine.h"
  17
  18 #include <q3frame.h>
  19 #include <q3ptrlist.h>
  20 #include <qpixmap.h>
  21 //Added by qt3to4:
  22 #include <QMouseEvent>
  23 #include <QDragEnterEvent>
  24 #include <QWheelEvent>
  25 #include <QEvent>
  26 #include <QDropEvent>
  27
  28 class QTimer;
  29 class Headline;
  30 template <class> class Q3PtrList;
  31 typedef Q3PtrList<Headline> HeadlineList;
  32
  33 class NewsScroller : public Q3Frame
  34 {
  35         Q_OBJECT
  36
  37         public:
  38                 NewsScroller(QWidget *, ConfigAccess *, const char * = 0);
  39
  40                 virtual QSize sizeHint() const;
  41                 virtual QSizePolicy sizePolicy() const;
  42
  43                 // Convenience stuff. Somehow ugly, no?
  44                 inline bool horizontal() const
  45                 {
  46                         return m_cfg->horizontal(static_cast<ConfigAccess::Direction>(m_cfg->scrollingDirection()));
  47                 }
  48
  49                 inline bool vertical() const
  50                 {
  51                         return m_cfg->vertical(static_cast<ConfigAccess::Direction>(m_cfg->scrollingDirection()));
  52                 }
  53
  54                 inline bool rotated() const
  55                 {
  56                         return m_cfg->rotated(static_cast<ConfigAccess::Direction>(m_cfg->scrollingDirection()));
  57                 }
  58
  59         public slots:
  60                 void clear();
  61                 void addHeadline(Article::Ptr);
  62                 void reset(bool bSeparatorOnly = false);
  63
  64         signals:
  65                 void contextMenu();
  66
  67         protected:
  68                 virtual void enterEvent(QEvent *);
  69                 virtual void mousePressEvent(QMouseEvent *);
  70                 virtual void mouseReleaseEvent(QMouseEvent *);
  71                 virtual void mouseMoveEvent(QMouseEvent *);
  72                 virtual void wheelEvent(QWheelEvent *);
  73                 virtual void leaveEvent(QEvent *);
  74                 virtual void drawContents(QPainter *);
  75                 virtual void dragEnterEvent( QDragEnterEvent *);
  76                 virtual void dropEvent(QDropEvent *);
  77
  78         protected slots:
  79                 void scroll(int = 1, bool = true);
  80                 void slotTimeout();
  81
  82         private:
  83                 int scrollWidth() const;
  84                 int scrollHeight() const;
  85                 bool updateActive(const QPoint &);
  86                 bool isHeadline(const QString &) const;
  87                 int speedAsInterval( int speed );
  88
  89         private:
  90                 friend class Headline;
  91                 ConfigAccess *m_cfg;
  92                 QTimer       *m_scrollTimer;
  93                 mutable HeadlineList m_headlines;
  94                 Headline     *m_activeHeadline;
  95                 QPixmap      m_separator;
  96                 int          m_offset;
  97                 QPoint       m_dragPos;
  98                 bool         m_mouseDrag;
  99                 QString      m_tempHeadline;
 100                 float        m_totalStepping;
 101                 float        m_stepping;
 102 };
 103
 104 #endif // NEWSSCROLLER_H