1 files changed, 62 insertions, 0 deletions
diff --git a/src/quicknativestyle/items/qquickstyleitemcheckbox.cpp b/src/quicknativestyle/items/qquickstyleitemcheckbox.cpp
new file mode 100644
index 0000000000..9223a514c2
--- /dev/null
+++ b/src/quicknativestyle/items/qquickstyleitemcheckbox.cpp
@@ -0,0 +1,62 @@
+// 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 "qquickstyleitemcheckbox.h"
+
+QT_BEGIN_NAMESPACE
+
+QFont QQuickStyleItemCheckBox::styleFont(QQuickItem *control) const
+{
+    return style()->font(QStyle::CE_RadioButtonLabel, controlSize(control));
+}
+
+void QQuickStyleItemCheckBox::connectToControl() const
+{
+    QQuickStyleItem::connectToControl();
+    auto checkbox = control<QQuickCheckBox>();
+    connect(checkbox, &QQuickCheckBox::downChanged, this, &QQuickStyleItem::markImageDirty);
+    connect(checkbox, &QQuickCheckBox::checkStateChanged, this, &QQuickStyleItem::markImageDirty);
+}
+
+StyleItemGeometry QQuickStyleItemCheckBox::calculateGeometry()
+{
+    QStyleOptionButton styleOption;
+    initStyleOption(styleOption);
+    StyleItemGeometry geometry;
+
+    geometry.minimumSize = style()->sizeFromContents(QStyle::CT_CheckBox, &styleOption, QSize(0, 0));
+    geometry.implicitSize = geometry.minimumSize;
+    styleOption.rect = QRect(QPoint(0, 0), geometry.implicitSize);
+    geometry.contentRect = style()->subElementRect(QStyle::SE_CheckBoxContents, &styleOption);
+    geometry.layoutRect = style()->subElementRect(QStyle::SE_CheckBoxLayoutItem, &styleOption);
+    geometry.ninePatchMargins = style()->ninePatchMargins(QStyle::CE_CheckBox, &styleOption, geometry.minimumSize);
+    geometry.focusFrameRadius = style()->pixelMetric(QStyle::PM_CheckBoxFocusFrameRadius, &styleOption);
+
+    // Spacing seems to already be baked into SE_CheckBoxContents, so ignore until needed
+    //const int space = style()->pixelMetric(QStyle::PM_CheckBoxLabelSpacing, &styleOption);
+
+    return geometry;
+}
+
+void QQuickStyleItemCheckBox::paintEvent(QPainter *painter) const
+{
+    QStyleOptionButton styleOption;
+    initStyleOption(styleOption);
+    style()->drawControl(QStyle::CE_CheckBox, &styleOption, painter);
+}
+
+void QQuickStyleItemCheckBox::initStyleOption(QStyleOptionButton &styleOption) const
+{
+    initStyleOptionBase(styleOption);
+    auto checkbox = control<QQuickCheckBox>();
+
+    styleOption.state |= checkbox->isDown() ? QStyle::State_Sunken : QStyle::State_Raised;
+    if (checkbox->isTristate() && checkbox->checkState() == Qt::PartiallyChecked)
+        styleOption.state |= QStyle::State_NoChange;
+    else
+        styleOption.state |= checkbox->isChecked() ? QStyle::State_On : QStyle::State_Off;
+}
+
+QT_END_NAMESPACE
+
+#include "moc_qquickstyleitemcheckbox.cpp"