1 files changed, 87 insertions, 0 deletions
diff --git a/src/quicknativestyle/items/qquickstyleitemprogressbar.cpp b/src/quicknativestyle/items/qquickstyleitemprogressbar.cpp
new file mode 100644
index 0000000000..1b765618ef
--- /dev/null
+++ b/src/quicknativestyle/items/qquickstyleitemprogressbar.cpp
@@ -0,0 +1,87 @@
+// 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 "qquickstyleitemprogressbar.h"
+
+QT_BEGIN_NAMESPACE
+
+QFont QQuickStyleItemProgressBar::styleFont(QQuickItem *control) const
+{
+    return style()->font(QStyle::CE_ProgressBarLabel, controlSize(control));
+}
+
+void QQuickStyleItemProgressBar::connectToControl() const
+{
+    QQuickStyleItem::connectToControl();
+    auto progressBar = control<QQuickProgressBar>();
+    connect(progressBar, &QQuickProgressBar::fromChanged, this, &QQuickStyleItem::markImageDirty);
+    connect(progressBar, &QQuickProgressBar::toChanged, this, &QQuickStyleItem::markImageDirty);
+    connect(progressBar, &QQuickProgressBar::positionChanged, this, &QQuickStyleItem::markImageDirty);
+}
+
+StyleItemGeometry QQuickStyleItemProgressBar::calculateGeometry()
+{
+    QStyleOptionProgressBar styleOption;
+    initStyleOption(styleOption);
+
+    StyleItemGeometry geometry;
+    geometry.minimumSize = style()->sizeFromContents(QStyle::CT_ProgressBar, &styleOption, QSize(0, 0));
+
+    // From qprogressbar.cpp in qtbase:
+    const int cw = style()->pixelMetric(QStyle::PM_ProgressBarChunkWidth, &styleOption);
+    QFontMetrics fm(control<QQuickProgressBar>()->font());
+    QSize size = QSize(qMax(9, cw) * 7 + fm.horizontalAdvance(QLatin1Char('0')) * 4, fm.height() + 8);
+    if (!(styleOption.state & QStyle::State_Horizontal))
+        size = size.transposed();
+
+    geometry.implicitSize =  style()->sizeFromContents(QStyle::CT_ProgressBar, &styleOption, size);
+    styleOption.rect = QRect(QPoint(0, 0), geometry.implicitSize);
+    geometry.contentRect = style()->subElementRect(QStyle::SE_ProgressBarContents, &styleOption);
+    geometry.layoutRect = style()->subElementRect(QStyle::SE_ProgressBarLayoutItem, &styleOption);
+    geometry.ninePatchMargins = style()->ninePatchMargins(QStyle::CE_ProgressBar, &styleOption, geometry.minimumSize);
+
+    return geometry;
+}
+
+void QQuickStyleItemProgressBar::paintEvent(QPainter *painter) const
+{
+    QStyleOptionProgressBar styleOption;
+    initStyleOption(styleOption);
+#ifndef Q_OS_MACOS
+    const QRect r = styleOption.rect;
+#endif
+    // Note: on macOS, the groove will paint both the background and the contents
+    styleOption.rect = style()->subElementRect(QStyle::SE_ProgressBarGroove, &styleOption);
+    style()->drawControl(QStyle::CE_ProgressBarGroove, &styleOption, painter);
+#ifndef Q_OS_MACOS
+    styleOption.rect = r;
+    styleOption.rect = style()->subElementRect(QStyle::SE_ProgressBarContents, &styleOption);
+    style()->drawControl(QStyle::CE_ProgressBarContents, &styleOption, painter);
+#endif
+}
+
+void QQuickStyleItemProgressBar::initStyleOption(QStyleOptionProgressBar &styleOption) const
+{
+    initStyleOptionBase(styleOption);
+    auto progressBar = control<QQuickProgressBar>();
+
+    styleOption.state = QStyle::State_Horizontal;
+
+    if (progressBar->isIndeterminate()) {
+        styleOption.minimum = 0;
+        styleOption.maximum = 0;
+    } else if (progressBar->to() - progressBar->from() < 100) {
+        // Add some range to support float numbers
+        styleOption.minimum = 0;
+        styleOption.maximum = (progressBar->to() - progressBar->from()) * 100;
+        styleOption.progress = (progressBar->value() - progressBar->from()) * 100;
+    } else {
+        styleOption.minimum = progressBar->from();
+        styleOption.maximum = progressBar->to();
+        styleOption.progress = progressBar->value();
+    }
+}
+
+QT_END_NAMESPACE
+
+#include "moc_qquickstyleitemprogressbar.cpp"