source: src/mvc/delegate.h @ c53a3f4

qt5
Last change on this file since c53a3f4 was 4be95b8, checked in by pavelpa <pavelpa@…>, 13 years ago

implemented drawing icons + number of favs/alarms
in the corresponding group

  • Property mode set to 100644
File size: 3.0 KB
Line 
1#ifndef DELEGATE_H
2#define DELEGATE_H
3
4#include <QItemDelegate>
5#include <QTreeView>
6#include <QPointer>
7
8class 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        };
23
24        class Control
25        {
26            public:
27                Control(ControlId aControlId, const QString &aImageName)
28                    : mId(aControlId)
29                    , mImage(new QImage(aImageName))
30                    , mDrawPoint(QPoint(0,0))
31                { }
32                inline QImage *image() const { return mImage; }
33                inline void setDrawPoint(const QPoint &aPoint) { mDrawPoint = aPoint; }
34                inline QPoint drawPoint(const QRect &aRect = QRect()) const // for painter to draw Control
35                {
36                    if(aRect == QRect()) // null rectangle
37                        return mDrawPoint; // returns relative drawing point
38                    else
39                        return QPoint(aRect.x()+aRect.width(),aRect.y()) + mDrawPoint; // returns absolute drawing point
40                }
41                inline QRect drawRect(const QRect &aRect) const // helper for determining if Control was clicked
42                {
43                    return QRect(drawPoint(aRect), drawPoint(aRect)+QPoint(mImage->size().width(),mImage->size().height()));
44                }
45            private:
46                ControlId mId;
47                QImage *mImage;
48                QPoint mDrawPoint; // relative 'start-drawing' position (may hold negative values)
49        };
50
51        Delegate(QTreeView *aParent); // the delegate 'owner' has to be specified in the constructor - it's used to obtain visualRect of selected item/index
52        ~Delegate();
53
54        void paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const;
55        QSize sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const;
56        //
57        Delegate::ControlId whichControlClicked(const QModelIndex &aIndex, const QPoint &aPoint) const;
58        bool isPointFromRect(const QPoint &aPoint, const QRect &aRect) const;
59
60    private:
61        bool hasParent( const QModelIndex &index ) const;
62        bool isLast( const QModelIndex &index ) const;
63        bool isExpanded( const QModelIndex &index ) const;
64        void defineControls();
65        // TODO: the better place for these methods would be 'eventmodel'
66        // they are used in 'paint' method and so it's better to obtain number of
67        // favourities/alarms once when the data has changed and not to call
68        // these methods which iterate over all Events in corresponding group
69        // every time it requires them
70        int numberOfFavourities(const QModelIndex &index) const;
71        int numberOfAlarms(const QModelIndex &index) const;
72
73    private:
74        QPointer<QTreeView> mViewPtr;
75        QMap<ControlId,Control*> mControls;
76};
77
78#endif /* DELEGATE_H */
79
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