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-rw-r--r--src/quicknativestyle/items/qquickstyleitemscrollviewcorner.cpp119
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diff --git a/src/quicknativestyle/items/qquickstyleitemscrollviewcorner.cpp b/src/quicknativestyle/items/qquickstyleitemscrollviewcorner.cpp
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-/****************************************************************************
-**
-** Copyright (C) 2020 The Qt Company Ltd.
-** Contact: http://www.qt.io/licensing/
-**
-** This file is part of the Qt Quick Controls 2 module of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:LGPL3$
-** 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 http://www.qt.io/terms-conditions. For further
-** information use the contact form at http://www.qt.io/contact-us.
-**
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 3 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPLv3 included in the
-** packaging of this file. Please review the following information to
-** ensure the GNU Lesser General Public License version 3 requirements
-** will be met: https://www.gnu.org/licenses/lgpl.html.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 2.0 or later as published by the Free
-** Software Foundation and appearing in the file LICENSE.GPL included in
-** the packaging of this file. Please review the following information to
-** ensure the GNU General Public License version 2.0 requirements will be
-** met: http://www.gnu.org/licenses/gpl-2.0.html.
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include "qquickstyleitemscrollviewcorner.h"
-
-StyleItemGeometry QQuickStyleItemScrollViewCorner::calculateGeometry()
-{
- QStyleOptionSlider styleOption;
- initStyleOption(styleOption);
-
- StyleItemGeometry geometry;
-
- // The size of the corner should be the width of the vertical
- // scrollbar and the height of the horizontal scrollbar.
- styleOption.orientation = Qt::Vertical;
- const auto vScrollBarWidth = style()->sizeFromContents(QStyle::CT_ScrollBar, &styleOption, QSize(0, 0)).width();
- styleOption.orientation = Qt::Horizontal;
- const auto hScrollBarHeight = style()->sizeFromContents(QStyle::CT_ScrollBar, &styleOption, QSize(0, 0)).height();
-
- geometry.minimumSize = QSize(vScrollBarWidth, hScrollBarHeight);
- geometry.implicitSize = geometry.minimumSize;
-
- return geometry;
-}
-
-void QQuickStyleItemScrollViewCorner::paintEvent(QPainter *painter) const
-{
- QStyleOptionSlider styleOption;
- initStyleOption(styleOption);
-
- // Grab a center piece of a vertical scrollbar groove onto a QImage, and use this
- // image to draw a corner. We draw the corner by first drawing the piece as it is, and
- // then rotate it 90 degrees, clip it into a triangle, and draw it once more on top.
- // The result is that we end up with one vertical and one horizontal triangle that
- // together form a filled corner rectangle.
-
- styleOption.orientation = Qt::Vertical;
-
- const qreal scale = window()->devicePixelRatio();
- const int grooveWidth = minimumSize().width();
- const int grooveHeight = minimumSize().height();
- const QSize scrollBarMinSize = style()->sizeFromContents(QStyle::CT_ScrollBar, &styleOption, QSize(0, 0));
- const QSize scrollBarSize = scrollBarMinSize + QSize(0, grooveHeight);
- const int hStart = scrollBarMinSize.height() / 2;
- const QRect targetImageRect(0, hStart * scale, grooveWidth * scale, grooveHeight * scale);
-
- QImage scrollBarImage(scrollBarSize * scale, QImage::Format_ARGB32_Premultiplied);
- scrollBarImage.setDevicePixelRatio(scale);
- scrollBarImage.fill(Qt::transparent);
- QPainter scrollBarPainter(&scrollBarImage);
- styleOption.rect = QRect(QPoint(0, 0), scrollBarSize);
- style()->drawComplexControl(QStyle::CC_ScrollBar, &styleOption, &scrollBarPainter);
-
- // Draw vertical groove
- painter->drawImage(QPoint(0, 0), scrollBarImage, targetImageRect);
-
- QPainterPath path;
- path.moveTo(0, 0);
- path.lineTo(0, grooveHeight);
- path.lineTo(grooveWidth, grooveHeight);
- path.closeSubpath();
-
- QTransform transform;
- transform.translate(grooveWidth, 0);
- transform.rotate(90);
-
- painter->save();
- painter->setCompositionMode(QPainter::CompositionMode_Source);
- painter->setClipPath(path);
- painter->setTransform(transform);
- // Draw horizontal groove, clipped to a triangle
- painter->drawImage(QPoint(0, 0), scrollBarImage, targetImageRect);
- painter->restore();
-}
-
-void QQuickStyleItemScrollViewCorner::initStyleOption(QStyleOptionSlider &styleOption) const
-{
- initStyleOptionBase(styleOption);
-
- styleOption.subControls = QStyle::SC_ScrollBarGroove;
- styleOption.activeSubControls = QStyle::SC_None;
- styleOption.pageStep = 1000;
- styleOption.minimum = 0;
- styleOption.maximum = 1;
- styleOption.sliderValue = 0;
-}