Fix single selection and view scrolling in atlas view when zoomed

Signed-off-by: Tomas Slusny <slusnucky@gmail.com>

Author: deathbeam

src/tiled/tilesetview.cpp

@@ -899,7 +899,7 @@ void TilesetView::paintEvent(QPaintEvent *event)
     for (Tile *tile : model->tileset()->tiles()) {
         const QRect rect = tileToView(tile->imageRect());
         const QModelIndex index = model->tileIndex(tile);
-        const bool selected = s->isSelected(index);
+        const bool selected = s->isSelected(index) || index == s->currentIndex();
         delegate->paintTile(&painter, model, tile, rect, palette().highlight(), selected, mHoveredIndex == index);
 
         if (mDrawGrid) {
@@ -935,6 +935,14 @@ QModelIndex TilesetView::indexAt(const QPoint &pos) const
     return QTableView::indexAt(pos);
 }
 
+void TilesetView::scrollTo(const QModelIndex &index, ScrollHint hint)
+{
+    if (!tilesetModel() || !tilesetModel()->tileset()->isAtlas() || dynamicWrapping()) {
+        QTableView::scrollTo(index, hint);
+        return;
+    }
+}
+
 void TilesetView::setSelection(const QRect &rect, QItemSelectionModel::SelectionFlags flags)
 {
     if (!tilesetModel() || !tilesetModel()->tileset()->isAtlas() || dynamicWrapping()) {

src/tiled/tilesetview.h

@@ -119,6 +119,7 @@ class TilesetView : public QTableView
     void resizeEvent(QResizeEvent *event) override;
     void paintEvent(QPaintEvent *event) override;
     QModelIndex indexAt(const QPoint &pos) const override;
+    void scrollTo(const QModelIndex &index, ScrollHint hint = EnsureVisible) override;
     void setSelection(const QRect &rect, QItemSelectionModel::SelectionFlags flags) override;
     void selectionChanged(const QItemSelection &selected, const QItemSelection &deselected) override;
     QRect visualRect(const QModelIndex &index) const override;