conflicts refactoring
[toast/confclerk.git] / src / mvc / delegate.h
1 #ifndef DELEGATE_H
2 #define DELEGATE_H
3
4 #include <QItemDelegate>
5 #include <QTreeView>
6 #include <QPointer>
7
8 class Delegate : public QItemDelegate
9 {
10     Q_OBJECT
11
12     public:
13
14         enum ControlId
15         {
16             ControlNone = 0,
17             FavouriteControlOn,
18             FavouriteControlOff,
19             AlarmControlOn,
20             AlarmControlOff,
21             MapControl,
22             WarningControl
23         };
24
25         class Control
26         {
27             public:
28                 Control(ControlId aControlId, const QString &aImageName)
29                     : mId(aControlId)
30                     , mImage(new QImage(aImageName))
31                     , mDrawPoint(QPoint(0,0))
32                 { }
33                 inline QImage *image() const { return mImage; }
34                 inline void setDrawPoint(const QPoint &aPoint) { mDrawPoint = aPoint; }
35                 inline QPoint drawPoint(const QRect &aRect = QRect()) const // for painter to draw Control
36                 {
37                     if(aRect == QRect()) // null rectangle
38                         return mDrawPoint; // returns relative drawing point
39                     else
40                         return QPoint(aRect.x()+aRect.width(),aRect.y()) + mDrawPoint; // returns absolute drawing point
41                 }
42                 inline QRect drawRect(const QRect &aRect) const // helper for determining if Control was clicked
43                 {
44                     return QRect(drawPoint(aRect), drawPoint(aRect)+QPoint(mImage->size().width(),mImage->size().height()));
45                 }
46                 bool hasConflict;
47             private:
48                 ControlId mId;
49                 QImage *mImage;
50                 QPoint mDrawPoint; // relative 'start-drawing' position (may hold negative values)
51         };
52
53         Delegate(QTreeView *aParent); // the delegate 'owner' has to be specified in the constructor - it's used to obtain visualRect of selected item/index
54         ~Delegate();
55
56         void paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const;
57         QSize sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const;
58         //
59         Delegate::ControlId whichControlClicked(const QModelIndex &aIndex, const QPoint &aPoint) const;
60         bool isPointFromRect(const QPoint &aPoint, const QRect &aRect) const;
61
62     private:
63         bool hasParent( const QModelIndex &index ) const;
64         bool isLast( const QModelIndex &index ) const;
65         bool isExpanded( const QModelIndex &index ) const;
66         void defineControls();
67         // TODO: the better place for these methods would be 'eventmodel'
68         // they are used in 'paint' method and so it's better to obtain number of
69         // favourities/alarms once when the data has changed and not to call
70         // these methods which iterate over all Events in corresponding group
71         // every time it requires them
72         int numberOfFavourities(const QModelIndex &index) const;
73         int numberOfAlarms(const QModelIndex &index) const;
74         bool hasTimeConflict(const QModelIndex &index, const QModelIndex &parent) const;
75
76     private:
77         QPointer<QTreeView> mViewPtr;
78         QMap<ControlId,Control*> mControls;
79 };
80
81 #endif /* DELEGATE_H */
82