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41 
42 #ifndef QABSTRACTSCROLLAREA_P_H
43 #define QABSTRACTSCROLLAREA_P_H
44 
45 //
46 //  W A R N I N G
47 //  -------------
48 //
49 // This file is not part of the Qt API.  It exists purely as an
50 // implementation detail.  This header file may change from version to
51 // version without notice, or even be removed.
52 //
53 // We mean it.
54 //
55 
56 #include "private/qframe_p.h"
57 #include "qabstractscrollarea.h"
58 
59 QT_BEGIN_NAMESPACE
60 
61 #ifndef QT_NO_SCROLLAREA
62 
63 class QScrollBar;
64 class QAbstractScrollAreaScrollBarContainer;
65 class Q_GUI_EXPORT QAbstractScrollAreaPrivate: public QFramePrivate
66 {
67     Q_DECLARE_PUBLIC(QAbstractScrollArea)
68 
69 public:
70     QAbstractScrollAreaPrivate();
71 
72     void replaceScrollBar(QScrollBar *scrollBar, Qt::Orientation orientation);
73 
74     QAbstractScrollAreaScrollBarContainer *scrollBarContainers[Qt::Vertical + 1];
75     QScrollBar *hbar, *vbar;
76     Qt::ScrollBarPolicy vbarpolicy, hbarpolicy;
77 
78     QWidget *viewport;
79     QWidget *cornerWidget;
80     QRect cornerPaintingRect;
81 #ifdef Q_WS_MAC
82     QRect reverseCornerPaintingRect;
83 #endif
84     int left, top, right, bottom; // viewport margin
85 
86     int xoffset, yoffset;
87 
88     void init();
89     void layoutChildren();
90     // ### Fix for 4.4, talk to Bjoern E or Girish.
scrollBarPolicyChanged(Qt::Orientation,Qt::ScrollBarPolicy)91     virtual void scrollBarPolicyChanged(Qt::Orientation, Qt::ScrollBarPolicy) {}
92 
93     void _q_hslide(int);
94     void _q_vslide(int);
95     void _q_showOrHideScrollBars();
96 
97     virtual QPoint contentsOffset() const;
98 
viewportEvent(QEvent * event)99     inline bool viewportEvent(QEvent *event)
100     { return q_func()->viewportEvent(event); }
101     QScopedPointer<QObject> viewportFilter;
102 
103 #ifdef Q_WS_WIN
104     bool singleFingerPanEnabled;
105     void setSingleFingerPanEnabled(bool on = true);
106 #endif
107 };
108 
109 class QAbstractScrollAreaFilter : public QObject
110 {
111     Q_OBJECT
112 public:
QAbstractScrollAreaFilter(QAbstractScrollAreaPrivate * p)113     QAbstractScrollAreaFilter(QAbstractScrollAreaPrivate *p) : d(p)
114     { setObjectName(QLatin1String("qt_abstractscrollarea_filter")); }
eventFilter(QObject * o,QEvent * e)115     bool eventFilter(QObject *o, QEvent *e)
116     { return (o == d->viewport ? d->viewportEvent(e) : false); }
117 private:
118     QAbstractScrollAreaPrivate *d;
119 };
120 
121 class QBoxLayout;
122 class QAbstractScrollAreaScrollBarContainer : public QWidget
123 {
124 public:
125     enum LogicalPosition { LogicalLeft = 1, LogicalRight = 2 };
126 
127     QAbstractScrollAreaScrollBarContainer(Qt::Orientation orientation, QWidget *parent);
128     void addWidget(QWidget *widget, LogicalPosition position);
129     QWidgetList widgets(LogicalPosition position);
130     void removeWidget(QWidget *widget);
131 
132     QScrollBar *scrollBar;
133     QBoxLayout *layout;
134 private:
135     int scrollBarLayoutIndex() const;
136 
137     Qt::Orientation orientation;
138 };
139 
140 #endif // QT_NO_SCROLLAREA
141 
142 QT_END_NAMESPACE
143 
144 #endif // QABSTRACTSCROLLAREA_P_H
145