HeaderView: Add support for list based models

Change-Id: I411136bd2b9a277d84a7c68c55bb1c317b6cc9d2
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>

2 files changed, 23 insertions, 3 deletions

diff --git a/src/quicktemplates2/qquickheaderview.cpp b/src/quicktemplates2/qquickheaderview.cpp
index 49463944..5c465cc7 100644
--- a/src/quicktemplates2/qquickheaderview.cpp
+++ b/src/quicktemplates2/qquickheaderview.cpp
@@ -151,7 +151,11 @@
 
     This property holds the model role used to display text in each header cell.
 
-    The default value is the \c "display" role.
+    When the model has multiple roles, textRole can be set to determine which
+    role should be displayed.
+
+    If model is a QAbstractItemModel then it will default to "display"; otherwise
+    it is empty.
 
     \sa QAbstractItemModel::roleNames()
 */
@@ -161,7 +165,11 @@
 
     This property holds the model role used to display text in each header cell.
 
-    The default value is the \c "display" role.
+    When the model has multiple roles, textRole can be set to determine which
+    role should be displayed.
+
+    If model is a QAbstractItemModel then it will default to "display"; otherwise
+    it is empty.
 
     \sa QAbstractItemModel::roleNames()
 */
@@ -241,6 +249,18 @@ void QQuickHeaderViewBasePrivate::syncModel()
     }
 
     QQuickTableViewPrivate::syncModel();
+
+    isTransposed = false;
+    const auto aim = model->abstractItemModel();
+    if (orientation() == Qt::Horizontal) {
+        // For models that are just a list or a number, and especially not a
+        // table, we transpose the view when the orientation is horizontal.
+        // The model (list) will then be laid out horizontally rather than
+        // vertically, which is the otherwise the default.
+        isTransposed = !aim || aim->columnCount() == 1;
+    }
+    if (m_textRole.isEmpty() && aim)
+        m_textRole = QLatin1String("display");
 }
 
 void QQuickHeaderViewBasePrivate::syncSyncView()
diff --git a/src/quicktemplates2/qquickheaderview_p_p.h b/src/quicktemplates2/qquickheaderview_p_p.h
index 961c554b..655c2a58 100644
--- a/src/quicktemplates2/qquickheaderview_p_p.h
+++ b/src/quicktemplates2/qquickheaderview_p_p.h
@@ -112,7 +112,7 @@ protected:
     };
     QStack<SectionSize> m_hiddenSectionSizes;
     bool m_modelExplicitlySetByUser = false;
-    QString m_textRole = QStringLiteral("display");
+    QString m_textRole;
 };
 
 class QQuickHorizontalHeaderViewPrivate : public QQuickHeaderViewBasePrivate