RangeSlider: use deferred execution

Task-number: QTBUG-50992
Change-Id: Ibbc946c3402c65f9b100fc74dde04e4d439c8535
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>

7 files changed, 315 insertions, 6 deletions

diff --git a/src/quicktemplates2/qquickrangeslider.cpp b/src/quicktemplates2/qquickrangeslider.cpp
index 274c887d..44c00f68 100644
--- a/src/quicktemplates2/qquickrangeslider.cpp
+++ b/src/quicktemplates2/qquickrangeslider.cpp
@@ -36,6 +36,7 @@
 
 #include "qquickrangeslider_p.h"
 #include "qquickcontrol_p_p.h"
+#include "qquickdeferredexecute_p_p.h"
 
 #include <QtCore/qscopedpointer.h>
 #include <QtQuick/private/qquickwindow_p.h>
@@ -109,13 +110,15 @@ public:
     void setPosition(qreal position, bool ignoreOtherPosition = false);
     void updatePosition(bool ignoreOtherPosition = false);
 
+    void executeHandle(bool complete = false);
+
     static QQuickRangeSliderNodePrivate *get(QQuickRangeSliderNode *node);
 
     qreal value;
     bool isPendingValue;
     qreal pendingValue;
     qreal position;
-    QQuickItem *handle;
+    QQuickDeferredPointer<QQuickItem> handle;
     QQuickRangeSlider *slider;
     bool pressed;
     bool hovered;
@@ -149,6 +152,20 @@ void QQuickRangeSliderNodePrivate::updatePosition(bool ignoreOtherPosition)
     setPosition(pos, ignoreOtherPosition);
 }
 
+static inline QString handleName() { return QStringLiteral("handle"); }
+
+void QQuickRangeSliderNodePrivate::executeHandle(bool complete)
+{
+    Q_Q(QQuickRangeSliderNode);
+    if (handle.wasExecuted())
+        return;
+
+    if (!handle)
+        quickBeginDeferred(q, handleName(), handle);
+    if (complete)
+        quickCompleteDeferred(q, handleName(), handle);
+}
+
 QQuickRangeSliderNodePrivate *QQuickRangeSliderNodePrivate::get(QQuickRangeSliderNode *node)
 {
     return node->d_func();
@@ -227,7 +244,9 @@ qreal QQuickRangeSliderNode::visualPosition() const
 
 QQuickItem *QQuickRangeSliderNode::handle() const
 {
-    Q_D(const QQuickRangeSliderNode);
+    QQuickRangeSliderNodePrivate *d = const_cast<QQuickRangeSliderNodePrivate *>(d_func());
+    if (!d->handle)
+        d->executeHandle();
     return d->handle;
 }
 
@@ -237,7 +256,7 @@ void QQuickRangeSliderNode::setHandle(QQuickItem *handle)
     if (d->handle == handle)
         return;
 
-    QQuickControlPrivate::destroyDelegate(d->handle, d->slider);
+    delete d->handle;
     d->handle = handle;
     if (handle) {
         if (!handle->parentItem())
@@ -263,7 +282,8 @@ void QQuickRangeSliderNode::setHandle(QQuickItem *handle)
 
         handle->setActiveFocusOnTab(true);
     }
-    emit handleChanged();
+    if (!d->handle.isExecuting())
+        emit handleChanged();
 }
 
 bool QQuickRangeSliderNode::isPressed() const
@@ -1045,13 +1065,28 @@ void QQuickRangeSlider::mirrorChange()
     emit d->second->visualPositionChanged();
 }
 
-void QQuickRangeSlider::componentComplete()
+void QQuickRangeSlider::classBegin()
 {
     Q_D(QQuickRangeSlider);
-    QQuickControl::componentComplete();
+    QQuickControl::classBegin();
 
+    QQmlContext *context = qmlContext(this);
+    if (context) {
+        QQmlEngine::setContextForObject(d->first, context);
+        QQmlEngine::setContextForObject(d->second, context);
+    }
+}
+
+void QQuickRangeSlider::componentComplete()
+{
+    Q_D(QQuickRangeSlider);
     QQuickRangeSliderNodePrivate *firstPrivate = QQuickRangeSliderNodePrivate::get(d->first);
     QQuickRangeSliderNodePrivate *secondPrivate = QQuickRangeSliderNodePrivate::get(d->second);
+    firstPrivate->executeHandle(true);
+    secondPrivate->executeHandle(true);
+    d->executeBackground(true);
+
+    QQuickControl::componentComplete();
 
     if (firstPrivate->isPendingValue || secondPrivate->isPendingValue
         || !qFuzzyCompare(d->from, defaultFrom) || !qFuzzyCompare(d->to, defaultTo)) {
diff --git a/src/quicktemplates2/qquickrangeslider_p.h b/src/quicktemplates2/qquickrangeslider_p.h
index fc5a1d99..cc071974 100644
--- a/src/quicktemplates2/qquickrangeslider_p.h
+++ b/src/quicktemplates2/qquickrangeslider_p.h
@@ -67,6 +67,7 @@ class Q_QUICKTEMPLATES2_PRIVATE_EXPORT QQuickRangeSlider : public QQuickControl
     Q_PROPERTY(Qt::Orientation orientation READ orientation WRITE setOrientation NOTIFY orientationChanged FINAL)
     // 2.2 (Qt 5.9)
     Q_PROPERTY(bool live READ live WRITE setLive NOTIFY liveChanged FINAL REVISION 2)
+    Q_CLASSINFO("DeferredPropertyNames", "background")
 
 public:
     explicit QQuickRangeSlider(QQuickItem *parent = nullptr);
@@ -124,6 +125,7 @@ protected:
     void touchEvent(QTouchEvent *event) override;
 #endif
     void mirrorChange() override;
+    void classBegin() override;
     void componentComplete() override;
 
 #if QT_CONFIG(accessibility)
@@ -149,6 +151,7 @@ class Q_QUICKTEMPLATES2_PRIVATE_EXPORT QQuickRangeSliderNode : public QObject
     Q_PROPERTY(bool pressed READ isPressed WRITE setPressed NOTIFY pressedChanged FINAL)
     // 2.1 (Qt 5.8)
     Q_PROPERTY(bool hovered READ isHovered WRITE setHovered NOTIFY hoveredChanged FINAL REVISION 1)
+    Q_CLASSINFO("DeferredPropertyNames", "handle")
 
 public:
     explicit QQuickRangeSliderNode(qreal value, QQuickRangeSlider *slider);
diff --git a/tests/auto/customization/data/styles/empty/RangeSlider.qml b/tests/auto/customization/data/styles/empty/RangeSlider.qml
new file mode 100644
index 00000000..c562d853
--- /dev/null
+++ b/tests/auto/customization/data/styles/empty/RangeSlider.qml
@@ -0,0 +1,57 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+import QtQuick 2.9
+import QtQuick.Templates 2.2 as T
+
+T.RangeSlider {
+    id: control
+    objectName: "rangeslider-empty"
+}
diff --git a/tests/auto/customization/data/styles/incomplete/RangeSlider.qml b/tests/auto/customization/data/styles/incomplete/RangeSlider.qml
new file mode 100644
index 00000000..2a77cec6
--- /dev/null
+++ b/tests/auto/customization/data/styles/incomplete/RangeSlider.qml
@@ -0,0 +1,65 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+import QtQuick 2.9
+import QtQuick.Templates 2.2 as T
+
+T.RangeSlider {
+    id: control
+    objectName: "rangeslider-incomplete"
+
+    first.handle: Item {
+        objectName: "rangeslider-first-handle-incomplete"
+    }
+
+    second.handle: Item {
+        objectName: "rangeslider-second-handle-incomplete"
+    }
+}
diff --git a/tests/auto/customization/data/styles/override/RangeSlider.qml b/tests/auto/customization/data/styles/override/RangeSlider.qml
new file mode 100644
index 00000000..21a0d820
--- /dev/null
+++ b/tests/auto/customization/data/styles/override/RangeSlider.qml
@@ -0,0 +1,69 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+import QtQuick 2.9
+import "../incomplete" as Incomplete
+
+Incomplete.RangeSlider {
+    id: control
+    objectName: "rangeslider-override"
+
+    first.handle: Rectangle {
+        objectName: "rangeslider-first-handle-override"
+    }
+
+    second.handle: Rectangle {
+        objectName: "rangeslider-second-handle-override"
+    }
+
+    background: Rectangle {
+        objectName: "rangeslider-background-override"
+    }
+}
diff --git a/tests/auto/customization/data/styles/simple/RangeSlider.qml b/tests/auto/customization/data/styles/simple/RangeSlider.qml
new file mode 100644
index 00000000..97a0b1cf
--- /dev/null
+++ b/tests/auto/customization/data/styles/simple/RangeSlider.qml
@@ -0,0 +1,76 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+import QtQuick 2.9
+import QtQuick.Templates 2.2 as T
+
+T.RangeSlider {
+    id: control
+    objectName: "rangeslider-simple"
+
+    implicitWidth: Math.max(control.first.handle.implicitWidth, control.second.handle.implicitWidth, background.implicitWidth)
+    implicitHeight: Math.max(control.first.handle.implicitHeight, control.second.handle.implicitHeight, background.implicitHeight)
+
+    first.handle: Rectangle {
+        objectName: "rangeslider-first-handle-simple"
+        color: control.first.pressed ? "red" : "green"
+    }
+
+    second.handle: Rectangle {
+        objectName: "rangeslider-second-handle-simple"
+        color: control.second.pressed ? "red" : "green"
+    }
+
+    background: Rectangle {
+        objectName: "rangeslider-background-simple"
+        implicitWidth: 200
+        implicitHeight: 20
+    }
+}
diff --git a/tests/auto/customization/tst_customization.cpp b/tests/auto/customization/tst_customization.cpp
index 57e6d6a7..04b1af0b 100644
--- a/tests/auto/customization/tst_customization.cpp
+++ b/tests/auto/customization/tst_customization.cpp
@@ -133,6 +133,7 @@ void tst_customization::creation_data()
     QTest::newRow("empty:Dial") << "empty" << "Dial" << (QStringList() << "dial-empty");
     QTest::newRow("empty:Label") << "empty" << "Label"<< (QStringList() << "label-empty");
     QTest::newRow("empty:RadioButton") << "empty" << "RadioButton" << (QStringList() << "radiobutton-empty");
+    QTest::newRow("empty:RangeSlider") << "empty" << "RangeSlider" << (QStringList() << "rangeslider-empty");
     QTest::newRow("empty:Slider") << "empty" << "Slider" << (QStringList() << "slider-empty");
     QTest::newRow("empty:TextField") << "empty" << "TextField"<< (QStringList() << "textfield-empty");
     QTest::newRow("empty:TextArea") << "empty" << "TextArea"<< (QStringList() << "textarea-empty");
@@ -142,6 +143,7 @@ void tst_customization::creation_data()
     QTest::newRow("incomplete:CheckBox") << "incomplete" << "CheckBox" << (QStringList() << "checkbox-incomplete" << "checkbox-contentItem-incomplete");
     QTest::newRow("incomplete:Dial") << "incomplete" << "Dial" << (QStringList() << "dial-incomplete" << "dial-handle-incomplete");
     QTest::newRow("incomplete:RadioButton") << "incomplete" << "RadioButton" << (QStringList() << "radiobutton-incomplete" << "radiobutton-indicator-incomplete");
+    QTest::newRow("incomplete:RangeSlider") << "incomplete" << "RangeSlider" << (QStringList() << "rangeslider-incomplete" << "rangeslider-first-handle-incomplete" << "rangeslider-second-handle-incomplete");
     QTest::newRow("incomplete:Slider") << "incomplete" << "Slider" << (QStringList() << "slider-incomplete" << "slider-handle-incomplete");
 
     // the "simple" style simulates a proper style and contains most delegates
@@ -150,6 +152,7 @@ void tst_customization::creation_data()
     QTest::newRow("simple:Dial") << "simple" << "Dial" << (QStringList() << "dial-simple" << "dial-background-simple" << "dial-handle-simple");
     QTest::newRow("simple:Label") << "simple" << "Label" << (QStringList() << "label-simple" << "label-background-simple");
     QTest::newRow("simple:RadioButton") << "simple" << "RadioButton" << (QStringList() << "radiobutton-simple" << "radiobutton-contentItem-simple" << "radiobutton-indicator-simple");
+    QTest::newRow("simple:RangeSlider") << "simple" << "RangeSlider" << (QStringList() << "rangeslider-simple" << "rangeslider-background-simple" << "rangeslider-first-handle-simple" << "rangeslider-second-handle-simple");
     QTest::newRow("simple:Slider") << "simple" << "Slider" << (QStringList() << "slider-simple" << "slider-background-simple" << "slider-handle-simple");
     QTest::newRow("simple:TextField") << "simple" << "TextField" << (QStringList() << "textfield-simple" << "textfield-background-simple");
     QTest::newRow("simple:TextArea") << "simple" << "TextArea" << (QStringList() << "textarea-simple" << "textarea-background-simple");
@@ -160,6 +163,7 @@ void tst_customization::creation_data()
     QTest::newRow("override:Dial") << "override" << "Dial" << (QStringList() << "dial-override"  << "dial-background-override" << "dial-handle-override" << "dial-incomplete"); // overrides "incomplete"
     QTest::newRow("override:Label") << "override" << "Label" << (QStringList() << "label-override" << "label-background-override" << "label-simple"); // overrides "simple"
     QTest::newRow("override:RadioButton") << "override" << "RadioButton" << (QStringList() << "radiobutton-override"  << "radiobutton-background-override" << "radiobutton-contentItem-simple" << "radiobutton-indicator-override" << "radiobutton-simple"); // overrides "simple"
+    QTest::newRow("override:RangeSlider") << "override" << "RangeSlider" << (QStringList() << "rangeslider-override"  << "rangeslider-background-override" << "rangeslider-first-handle-override" << "rangeslider-second-handle-override" << "rangeslider-incomplete"); // overrides "incomplete"
     QTest::newRow("override:Slider") << "override" << "Slider" << (QStringList() << "slider-override"  << "slider-background-override" << "slider-handle-override" << "slider-incomplete"); // overrides "incomplete"
     QTest::newRow("override:TextField") << "override" << "TextField" << (QStringList() << "textfield-override" << "textfield-background-override" << "textfield-simple"); // overrides "simple"
     QTest::newRow("override:TextArea") << "override" << "TextArea" << (QStringList() << "textarea-override" << "textarea-background-override" << "textarea-simple"); // overrides "simple"