1 files changed, 96 insertions, 0 deletions
diff --git a/src/quicknativestyle/items/qquickstyleitemslider.cpp b/src/quicknativestyle/items/qquickstyleitemslider.cpp
new file mode 100644
index 0000000000..e532df4499
--- /dev/null
+++ b/src/quicknativestyle/items/qquickstyleitemslider.cpp
@@ -0,0 +1,96 @@
+// Copyright (C) 2020 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+#include "qquickstyleitemslider.h"
+
+QT_BEGIN_NAMESPACE
+
+QFont QQuickStyleItemSlider::styleFont(QQuickItem *control) const
+{
+    return style()->font(QStyle::CE_ProgressBarLabel, controlSize(control));
+}
+
+void QQuickStyleItemSlider::connectToControl() const
+{
+    QQuickStyleItem::connectToControl();
+    auto slider = control<QQuickSlider>();
+    connect(slider, &QQuickSlider::fromChanged, this, &QQuickStyleItem::markImageDirty);
+    connect(slider, &QQuickSlider::toChanged, this, &QQuickStyleItem::markImageDirty);
+    connect(slider, &QQuickSlider::positionChanged, this, &QQuickStyleItem::markImageDirty);
+    connect(slider, &QQuickSlider::valueChanged, this, &QQuickStyleItem::markImageDirty);
+    connect(slider, &QQuickSlider::stepSizeChanged, this, &QQuickStyleItem::markImageDirty);
+    connect(slider, &QQuickSlider::pressedChanged, this, &QQuickStyleItem::markImageDirty);
+    connect(slider, &QQuickSlider::orientationChanged, this, &QQuickStyleItem::markImageDirty);
+}
+
+StyleItemGeometry QQuickStyleItemSlider::calculateGeometry()
+{
+    QStyleOptionSlider styleOption;
+    initStyleOption(styleOption);
+
+    StyleItemGeometry geometry;
+    geometry.minimumSize = style()->sizeFromContents(QStyle::CT_Slider, &styleOption, QSize(0, 0));
+    geometry.implicitSize = geometry.minimumSize;
+    styleOption.rect = QRect(QPoint(0, 0), geometry.implicitSize);
+    geometry.layoutRect = style()->subElementRect(QStyle::SE_SliderLayoutItem, &styleOption);
+    geometry.ninePatchMargins = style()->ninePatchMargins(QStyle::CC_Slider, &styleOption, geometry.minimumSize);
+    geometry.focusFrameRadius = style()->pixelMetric(QStyle::PM_SliderFocusFrameRadius, &styleOption);
+
+    return geometry;
+}
+
+void QQuickStyleItemSlider::paintEvent(QPainter *painter) const
+{
+    QStyleOptionSlider styleOption;
+    initStyleOption(styleOption);
+    style()->drawComplexControl(QStyle::CC_Slider, &styleOption, painter);
+}
+
+void QQuickStyleItemSlider::initStyleOption(QStyleOptionSlider &styleOption) const
+{
+    initStyleOptionBase(styleOption);
+    auto slider = control<QQuickSlider>();
+
+    styleOption.subControls = QStyle::SC_None;
+    if (m_subControl & Groove)
+        styleOption.subControls |= QStyle::SC_SliderGroove;
+    if (m_subControl & Handle)
+        styleOption.subControls |= QStyle::SC_SliderHandle;
+    styleOption.activeSubControls = QStyle::SC_None;
+    styleOption.orientation = slider->orientation();
+
+    if (slider->isPressed())
+        styleOption.state |= QStyle::State_Sunken;
+
+    qreal min = 0;
+    qreal max = 1;
+    if (!qFuzzyIsNull(slider->stepSize())) {
+        min = slider->from();
+        max = slider->to();
+
+        // TODO: add proper API for tickmarks
+        const int index = slider->metaObject()->indexOfProperty("qqc2_style_tickPosition");
+        if (index != -1) {
+            const int tickPosition = slider->metaObject()->property(index).read(slider).toInt();
+            styleOption.tickPosition = QStyleOptionSlider::TickPosition(tickPosition);
+            if (styleOption.tickPosition != QStyleOptionSlider::NoTicks)
+                styleOption.subControls |= QStyle::SC_SliderTickmarks;
+        }
+    }
+
+    // Since the [from, to] interval in QQuickSlider is floating point, users can
+    // specify very small ranges and step sizes, (e.g. [0.., 0.25], step size 0.05).
+    // Since the style operates on ints, we cannot pass these values directly to the style,
+    // so we normalize all values to the range [0, 10000]
+    static const qreal Scale = 10000;
+    const qreal normalizeMultiplier = Scale/(max - min);
+    styleOption.tickInterval = int(slider->stepSize() * normalizeMultiplier);
+    styleOption.minimum = 0;
+    styleOption.maximum = int(Scale);
+    styleOption.sliderValue = int((slider->value() - min) * normalizeMultiplier);
+    styleOption.sliderPosition = int(slider->position() * styleOption.maximum);
+}
+
+QT_END_NAMESPACE
+
+#include "moc_qquickstyleitemslider.cpp"