Add itemAlignment property to QListView

This property allows to change the default behavior in
which list items occupy the entire width of their column.
Setting it to Qt::{AlignLeft,AlignRight,AlignHCenter} will
reduce their widths to the minimum values, thus allowing to
have intermediate free space. Then the user will be able to
begin selections by mouse from this space.

[ChangeLog][QtWidgets][QListView] Added itemAlignment property.

Task-number: QTBUG-56606
Change-Id: Iae55c251379be4e45d0c0d69175ff4388b5785b4
Reviewed-by: Christian Ehrlicher <ch.ehrlicher@gmx.de>
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>

1 files changed, 24 insertions, 0 deletions

diff --git a/tests/auto/widgets/itemviews/qlistview/tst_qlistview.cpp b/tests/auto/widgets/itemviews/qlistview/tst_qlistview.cpp
index 237b950935..8287495dc6 100644
--- a/tests/auto/widgets/itemviews/qlistview/tst_qlistview.cpp
+++ b/tests/auto/widgets/itemviews/qlistview/tst_qlistview.cpp
@@ -149,6 +149,7 @@ private slots:
     void taskQTBUG_7232_AllowUserToControlSingleStep();
     void taskQTBUG_51086_skippingIndexesInSelectedIndexes();
     void taskQTBUG_47694_indexOutOfBoundBatchLayout();
+    void itemAlignment();
 };
 
 // Testing get/set functions
@@ -2544,5 +2545,28 @@ void tst_QListView::taskQTBUG_47694_indexOutOfBoundBatchLayout()
     view.scrollTo(model.index(batchSize - 1, 0));
 }
 
+void tst_QListView::itemAlignment()
+{
+    auto item1 = new QStandardItem("111");
+    auto item2 = new QStandardItem("111111");
+    QStandardItemModel model;
+    model.appendRow(item1);
+    model.appendRow(item2);
+
+    QListView w;
+    w.setModel(&model);
+    w.setWrapping(true);
+    w.show();
+    QVERIFY(QTest::qWaitForWindowExposed(&w));
+
+    QVERIFY(w.visualRect(item1->index()).width() > 0);
+    QVERIFY(w.visualRect(item1->index()).width() == w.visualRect(item2->index()).width());
+
+    w.setItemAlignment(Qt::AlignLeft);
+    QApplication::processEvents();
+
+    QVERIFY(w.visualRect(item1->index()).width() < w.visualRect(item2->index()).width());
+}
+
 QTEST_MAIN(tst_QListView)
 #include "tst_qlistview.moc"