1  #include "filtersorter.h"
 2  #include "filters/filter.h"
 3  
 4  namespace qqsfpm {
 5  
 6  /*!
 7      \qmltype FilterSorter
 8      \inherits Sorter
 9      \inqmlmodule SortFilterProxyModel
10      \ingroup Sorters
11      \ingroup FilterContainer
12      \brief Sorts rows based on if they match filters.
13  
14      A FilterSorter is a \l Sorter that orders row matching its filters before the rows not matching the filters.
15  
16      In the following example, rows with their \c favorite role set to \c true will be ordered at the beginning :
17      \code
18      SortFilterProxyModel {
19          sourceModel: contactModel
20          sorters: FilterSorter {
21              ValueFilter { roleName: "favorite"; value: true }
22          }
23      }
24      \endcode
25      \sa FilterContainer
26  */
27  
28  /*!
29      \qmlproperty list<Filter> FilterSorter::filters
30      \default
31  
32      This property holds the list of filters for this filter sorter.
33      If a row match all this FilterSorter's filters, it will be ordered before rows not matching all the filters.
34  
35      \sa Filter, FilterContainer
36  */
37  
38  int FilterSorter::compare(const QModelIndex& sourceLeft, const QModelIndex& sourceRight, const QQmlSortFilterProxyModel &proxyModel) const
39  {
40      bool leftIsAccepted = indexIsAccepted(sourceLeft, proxyModel);
41      bool rightIsAccepted = indexIsAccepted(sourceRight, proxyModel);
42  
43      if (leftIsAccepted == rightIsAccepted)
44          return 0;
45  
46      return leftIsAccepted ? -1 : 1;
47  }
48  
49  void FilterSorter::proxyModelCompleted(const QQmlSortFilterProxyModel& proxyModel)
50  {
51      for (Filter* filter : qAsConst(m_filters))
52          filter->proxyModelCompleted(proxyModel);
53  }
54  
55  void FilterSorter::onFilterAppended(Filter* filter)
56  {
57      connect(filter, &Filter::invalidated, this, &FilterSorter::invalidate);
58      invalidate();
59  }
60  
61  void FilterSorter::onFilterRemoved(Filter* filter)
62  {
63      disconnect(filter, &Filter::invalidated, this, &FilterSorter::invalidate);
64      invalidate();
65  }
66  
67  void FilterSorter::onFiltersCleared()
68  {
69      invalidate();
70  }
71  
72  bool FilterSorter::indexIsAccepted(const QModelIndex& sourceIndex, const QQmlSortFilterProxyModel& proxyModel) const
73  {
74      return std::all_of(m_filters.begin(), m_filters.end(),
75          [&] (Filter* filter) {
76              return filter->filterAcceptsRow(sourceIndex, proxyModel);
77          }
78      );
79  }
80  
81  }