Port QVariantAnimation to the new property system

Skipped startValue/endValue properties, since they are computed and
writable, which is not supported at the moment.

Skipped currentValue, since its setter might be called inside the
getter, which is not recommended.

Task-number: QTBUG-85520
Change-Id: I1f872b4fcc7227ed91b6915891bbc66019151826
Reviewed-by: Ivan Solovev <ivan.solovev@qt.io>
Reviewed-by: Andreas Buhr <andreas.buhr@qt.io>
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>

src/corelib/animation/qvariantanimation.cpp

@@ -230,7 +230,8 @@ void QVariantAnimationPrivate::recalculateCurrentInterval(bool force/*=false*/)
         return;
 
     const qreal endProgress = (direction == QAbstractAnimation::Forward) ? qreal(1) : qreal(0);
-    const qreal progress = easing.valueForProgress(((duration == 0) ? endProgress : qreal(currentTime) / qreal(duration)));
+    const qreal progress = easing.value().valueForProgress(
+            duration == 0 ? endProgress : qreal(currentTime) / qreal(duration));
 
     //0 and 1 are still the boundaries
     if (force || (currentInterval.start.first > 0 && progress < currentInterval.start.first)
@@ -386,8 +387,17 @@ QEasingCurve QVariantAnimation::easingCurve() const
 void QVariantAnimation::setEasingCurve(const QEasingCurve &easing)
 {
     Q_D(QVariantAnimation);
+    const bool valueChanged = easing != d->easing;
     d->easing = easing;
     d->recalculateCurrentInterval();
+    if (valueChanged)
+        d->easing.notify();
+}
+
+QBindable<QEasingCurve> QVariantAnimation::bindableEasingCurve()
+{
+    Q_D(QVariantAnimation);
+    return &d->easing;
 }
 
 typedef QList<QVariantAnimation::Interpolator> QInterpolatorVector;
@@ -506,10 +516,19 @@ void QVariantAnimation::setDuration(int msecs)
         qWarning("QVariantAnimation::setDuration: cannot set a negative duration");
         return;
     }
-    if (d->duration == msecs)
+    if (d->duration == msecs) {
+        d->duration.removeBindingUnlessInWrapper();
         return;
+    }
     d->duration = msecs;
     d->recalculateCurrentInterval();
+    d->duration.notify();
+}
+
+QBindable<int> QVariantAnimation::bindableDuration()
+{
+    Q_D(QVariantAnimation);
+    return &d->duration;
 }
 
 /*!

src/corelib/animation/qvariantanimation.h

@@ -57,8 +57,9 @@ class Q_CORE_EXPORT QVariantAnimation : public QAbstractAnimation
     Q_PROPERTY(QVariant startValue READ startValue WRITE setStartValue)
     Q_PROPERTY(QVariant endValue READ endValue WRITE setEndValue)
     Q_PROPERTY(QVariant currentValue READ currentValue NOTIFY valueChanged)
-    Q_PROPERTY(int duration READ duration WRITE setDuration)
-    Q_PROPERTY(QEasingCurve easingCurve READ easingCurve WRITE setEasingCurve)
+    Q_PROPERTY(int duration READ duration WRITE setDuration BINDABLE bindableDuration)
+    Q_PROPERTY(QEasingCurve easingCurve READ easingCurve WRITE setEasingCurve
+               BINDABLE bindableEasingCurve)
 
 public:
     typedef QPair<qreal, QVariant> KeyValue;
@@ -83,9 +84,11 @@ public:
 
     int duration() const override;
     void setDuration(int msecs);
+    QBindable<int> bindableDuration();
 
     QEasingCurve easingCurve() const;
     void setEasingCurve(const QEasingCurve &easing);
+    QBindable<QEasingCurve> bindableEasingCurve();
 
     typedef QVariant (*Interpolator)(const void *from, const void *to, qreal progress);
 

src/corelib/animation/qvariantanimation_p.h

@@ -56,6 +56,7 @@
 #include <QtCore/qmetaobject.h>
 
 #include "private/qabstractanimation_p.h"
+#include "private/qproperty_p.h"
 
 #include <type_traits>
 
@@ -87,8 +88,14 @@ public:
         QVariantAnimation::KeyValue start, end;
     } currentInterval;
 
-    QEasingCurve easing;
-    int duration;
+    void setEasingCurve(const QEasingCurve &easing) { q_func()->setEasingCurve(easing); }
+    Q_OBJECT_COMPAT_PROPERTY(QVariantAnimationPrivate, QEasingCurve, easing,
+                             &QVariantAnimationPrivate::setEasingCurve)
+
+    void setDuration(int msecs) { q_func()->setDuration(msecs); }
+    Q_OBJECT_COMPAT_PROPERTY(QVariantAnimationPrivate, int, duration,
+                             &QVariantAnimationPrivate::setDuration)
+
     QVariantAnimation::KeyValues keyValues;
     QVariantAnimation::Interpolator interpolator;
 

tests/auto/corelib/animation/qvariantanimation/CMakeLists.txt

@@ -7,4 +7,6 @@
 qt_internal_add_test(tst_qvariantanimation
     SOURCES
         tst_qvariantanimation.cpp
+    LIBRARIES
+        Qt::TestPrivate
 )

tests/auto/corelib/animation/qvariantanimation/tst_qvariantanimation.cpp

@@ -29,6 +29,7 @@
 
 #include <QtCore/qvariantanimation.h>
 #include <QTest>
+#include <QtTest/private/qpropertytesthelper_p.h>
 
 class tst_QVariantAnimation : public QObject
 {
@@ -44,6 +45,8 @@ private slots:
     void keyValues();
     void duration();
     void interpolation();
+    void durationBindings();
+    void easingCurveBindings();
 };
 
 class TestableQVariantAnimation : public QVariantAnimation
@@ -154,6 +157,32 @@ void tst_QVariantAnimation::interpolation()
     QCOMPARE(pointAnim.currentValue().toPoint(), QPoint(50, 50));
 }
 
+void tst_QVariantAnimation::durationBindings()
+{
+    QVariantAnimation animation;
+
+    // duration property
+    QProperty<int> duration;
+    animation.bindableDuration().setBinding(Qt::makePropertyBinding(duration));
+
+    // negative values must be ignored
+    QTest::ignoreMessage(QtWarningMsg,
+                         "QVariantAnimation::setDuration: cannot set a negative duration");
+    duration = -1;
+    QVERIFY(animation.duration() != duration);
+
+    QTestPrivate::testReadWritePropertyBasics(animation, 42, 43, "duration");
+}
+
+void tst_QVariantAnimation::easingCurveBindings()
+{
+    QVariantAnimation animation;
+
+    QTestPrivate::testReadWritePropertyBasics(animation, QEasingCurve(QEasingCurve::InQuad),
+                                              QEasingCurve(QEasingCurve::BezierSpline),
+                                              "easingCurve");
+}
+
 QTEST_MAIN(tst_QVariantAnimation)
 
 #include "tst_qvariantanimation.moc"