Implement helm-like filtering (still WIP)

src/folder/entitycollectionorderproxymodel.cpp

@@ -141,6 +141,45 @@ bool EntityCollectionOrderProxyModel::lessThan(const QModelIndex &left, const QM
     }
 }
 
+bool EntityCollectionOrderProxyModel::filterAcceptsRow(int source_row, const QModelIndex &parent) const
+{
+
+    QStringList words = filterRegExp().pattern().split(' ',QString::SkipEmptyParts);
+    if (words.count()>1) {      // helm style
+        bool accept = true;
+
+        for (int i=0;(accept && i<words.count());i++) {
+            EntityCollectionOrderProxyModel tmp;
+            tmp.setSourceModel(sourceModel());
+            tmp.setFilterCaseSensitivity(Qt::CaseInsensitive);
+            tmp.setFilterWildcard(words[i]);
+            accept &= tmp.filterAcceptsRow(source_row,parent);
+        }
+        if (!accept)
+            return false;
+
+        accept = false;
+        for (int i=0;(!accept && i<words.count());i++) {
+            EntityCollectionOrderProxyModel tmp;
+            tmp.setSourceModel(sourceModel());
+            tmp.setFilterCaseSensitivity(Qt::CaseInsensitive);
+            tmp.setFilterWildcard(words[i]);
+            accept |= tmp.QSortFilterProxyModel::filterAcceptsRow(source_row,parent);
+        }
+        return accept;
+    }
+
+    if (QSortFilterProxyModel::filterAcceptsRow(source_row, parent))
+        return true;
+
+    // walk up the hierarchy
+    if (parent.isValid()) {
+        return filterAcceptsRow(parent.row(),parent.parent());
+    }
+
+    return false;
+}
+
 void EntityCollectionOrderProxyModel::setManualSortingActive(bool active)
 {
     if (d->manualSortingActive == active) {

src/folder/entitycollectionorderproxymodel.h

@@ -36,6 +36,8 @@ public:
 
     Q_REQUIRED_RESULT bool lessThan(const QModelIndex &left, const QModelIndex &right) const override;
 
+    bool filterAcceptsRow(int source_row, const QModelIndex &parent) const override;
+
     void setManualSortingActive(bool active);
     Q_REQUIRED_RESULT bool isManualSortingActive() const;