Add new PathAngleArc type

This type allows working with arcs in different ways (based
on angles rather than start/end positions) that can be more
intuitive for certain use cases (such as a circular
progress indicator).

[ChangeLog][QtQuick][Path] Add new PathAngleArc type

Change-Id: Icbe5fc0450edd9a4d92f9a8d03438842b72a312d
Task-number: QTBUG-62684
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>

2 files changed, 52 insertions, 0 deletions

diff --git a/tests/auto/quick/qquickpath/data/anglearc.qml b/tests/auto/quick/qquickpath/data/anglearc.qml
new file mode 100644
index 0000000000..cbe41c1ac8
--- /dev/null
+++ b/tests/auto/quick/qquickpath/data/anglearc.qml
@@ -0,0 +1,12 @@
+import QtQuick 2.11
+
+Path {
+    PathAngleArc {
+        centerX: 100
+        centerY: 100
+        radiusX: 50
+        radiusY: 50
+        startAngle: 45
+        sweepAngle: 90
+    }
+}
diff --git a/tests/auto/quick/qquickpath/tst_qquickpath.cpp b/tests/auto/quick/qquickpath/tst_qquickpath.cpp
index 2ec95840e1..106d7afd85 100644
--- a/tests/auto/quick/qquickpath/tst_qquickpath.cpp
+++ b/tests/auto/quick/qquickpath/tst_qquickpath.cpp
@@ -41,6 +41,7 @@ public:
 
 private slots:
     void arc();
+    void angleArc();
     void catmullromCurve();
     void closedCatmullromCurve();
     void svg();
@@ -82,6 +83,45 @@ void tst_QuickPath::arc()
     QCOMPARE(pos, QPointF(100,100));
 }
 
+void tst_QuickPath::angleArc()
+{
+    QQmlEngine engine;
+    QQmlComponent c(&engine, testFileUrl("anglearc.qml"));
+    QQuickPath *obj = qobject_cast<QQuickPath*>(c.create());
+    QVERIFY(obj != 0);
+
+    QQmlListReference list(obj, "pathElements");
+    QCOMPARE(list.count(), 1);
+
+    QQuickPathAngleArc* arc = qobject_cast<QQuickPathAngleArc*>(list.at(0));
+    QVERIFY(arc != 0);
+    QCOMPARE(arc->centerX(), 100.);
+    QCOMPARE(arc->centerY(), 100.);
+    QCOMPARE(arc->radiusX(), 50.);
+    QCOMPARE(arc->radiusY(), 50.);
+    QCOMPARE(arc->startAngle(), 45.);
+    QCOMPARE(arc->sweepAngle(), 90.);
+    QCOMPARE(arc->moveToStart(), true);
+
+    QPainterPath path = obj->path();
+    QVERIFY(path != QPainterPath());
+
+    // using QPoint to do fuzzy compare
+    QPointF pos = obj->pointAt(0);
+    QCOMPARE(pos.toPoint(), QPoint(135,135));
+    pos = obj->pointAt(.25);
+    QCOMPARE(pos.toPoint(), QPoint(119,146));
+    pos = obj->pointAt(.75);
+    QCOMPARE(pos.toPoint(), QPoint(81,146));
+    pos = obj->pointAt(1);
+    QCOMPARE(pos.toPoint(), QPoint(65,135));
+
+    // if moveToStart is false, we should have a line starting from startX/Y
+    arc->setMoveToStart(false);
+    pos = obj->pointAt(0);
+    QCOMPARE(pos, QPointF(0,0));
+}
+
 void tst_QuickPath::catmullromCurve()
 {
     QQmlEngine engine;