1 | #ifndef DELEGATE_H |
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2 | #define DELEGATE_H |
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3 | |
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4 | #include <QItemDelegate> |
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5 | #include <QTreeView> |
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6 | #include <QPointer> |
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7 | |
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8 | class Delegate : public QItemDelegate |
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9 | { |
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10 | Q_OBJECT |
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11 | |
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12 | public: |
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13 | |
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14 | enum ControlId |
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15 | { |
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16 | ControlNone = 0, |
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17 | FavouriteControlOn, |
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18 | FavouriteControlOff, |
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19 | AlarmControlOn, |
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20 | AlarmControlOff, |
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21 | MapControl |
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22 | }; |
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23 | |
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24 | class Control |
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25 | { |
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26 | public: |
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27 | Control(ControlId aControlId, const QString &aImageName) |
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28 | : mId(aControlId) |
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29 | , mImage(new QImage(aImageName)) |
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30 | , mDrawPoint(QPoint(0,0)) |
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31 | { } |
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32 | inline QImage *image() const { return mImage; } |
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33 | inline void setDrawPoint(const QPoint &aPoint) { mDrawPoint = aPoint; } |
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34 | inline QPoint drawPoint(const QRect &aRect) const // for painter to draw Control |
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35 | { |
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36 | return QPoint(aRect.x()+aRect.width(),aRect.y()) + mDrawPoint; |
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37 | } |
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38 | inline QRect drawRect(const QRect &aRect) const // helper for determining if Control was clicked |
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39 | { |
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40 | return QRect(drawPoint(aRect), drawPoint(aRect)+QPoint(mImage->size().width(),mImage->size().height())); |
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41 | } |
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42 | private: |
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43 | ControlId mId; |
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44 | QImage *mImage; |
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45 | QPoint mDrawPoint; // relative 'start-drawing' position (may hold negative values) |
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46 | }; |
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47 | |
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48 | Delegate(QTreeView *aParent); // the delegate 'owner' has to be specified in the constructor - it's used to obtain visualRect of selected item/index |
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49 | ~Delegate(); |
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50 | |
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51 | void paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const; |
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52 | QSize sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const; |
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53 | // |
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54 | Delegate::ControlId whichControlClicked(const QModelIndex &aIndex, const QPoint &aPoint) const; |
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55 | bool isPointFromRect(const QPoint &aPoint, const QRect &aRect) const; |
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56 | |
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57 | private: |
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58 | bool hasParent( const QModelIndex &index ) const; |
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59 | bool isLast( const QModelIndex &index ) const; |
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60 | bool isExpanded( const QModelIndex &index ) const; |
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61 | void defineControls(); |
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62 | |
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63 | private: |
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64 | QPointer<QTreeView> mViewPtr; |
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65 | QMap<ControlId,Control*> mControls; |
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66 | }; |
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67 | |
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68 | #endif /* DELEGATE_H */ |
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69 | |
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