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// 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 "qquickstyleitemscrollbar.h"
QT_BEGIN_NAMESPACE
QQuickStyleItemScrollBar::QQuickStyleItemScrollBar(QQuickItem *parent)
: QQuickStyleItem(parent)
{
#ifdef QT_DEBUG
setObjectName("styleItemScrollBar");
#endif
}
QFont QQuickStyleItemScrollBar::styleFont(QQuickItem *control) const
{
return style()->font(QStyle::CE_ProgressBarLabel, controlSize(control));
}
void QQuickStyleItemScrollBar::connectToControl() const
{
QQuickStyleItem::connectToControl();
auto scrollBar = control<QQuickScrollBar>();
connect(scrollBar, &QQuickScrollBar::orientationChanged, this, &QQuickStyleItem::markImageDirty);
connect(scrollBar, &QQuickScrollBar::pressedChanged, this, &QQuickStyleItem::markImageDirty);
}
StyleItemGeometry QQuickStyleItemScrollBar::calculateGeometry()
{
QStyleOptionSlider styleOption;
initStyleOption(styleOption);
StyleItemGeometry geometry;
geometry.minimumSize = style()->sizeFromContents(QStyle::CT_ScrollBar, &styleOption, QSize(0, 0));
if (m_subControl == SubLine || m_subControl == AddLine) {
// So far, we know that only the windows style uses these subcontrols,
// so we can use hardcoded sizes...
QSize sz(16, 17);
if (styleOption.orientation == Qt::Vertical)
sz.transpose();
geometry.minimumSize = sz;
}
geometry.implicitSize = geometry.minimumSize;
styleOption.rect = QRect(QPoint(0, 0), geometry.implicitSize);
geometry.layoutRect = style()->subElementRect(QStyle::SE_ScrollBarLayoutItem, &styleOption);
geometry.ninePatchMargins = style()->ninePatchMargins(QStyle::CC_ScrollBar, &styleOption, geometry.minimumSize);
return geometry;
}
void QQuickStyleItemScrollBar::paintEvent(QPainter *painter) const
{
QStyleOptionSlider styleOption;
initStyleOption(styleOption);
if (m_subControl == SubLine || m_subControl == AddLine) {
QStyle::SubControl sc = m_subControl == SubLine ? QStyle::SC_ScrollBarSubLine : QStyle::SC_ScrollBarAddLine;
QStyleOptionSlider opt = styleOption;
opt.subControls = QStyle::SC_ScrollBarAddLine
| QStyle::SC_ScrollBarSubLine
| QStyle::SC_ScrollBarGroove;
const qreal scale = window()->effectiveDevicePixelRatio();
const QSize scrollBarMinSize = style()->sizeFromContents(QStyle::CT_ScrollBar, &opt, QSize(0, 0));
const QSize sz = scrollBarMinSize * scale;
QImage scrollBarImage(sz, QImage::Format_ARGB32_Premultiplied);
scrollBarImage.setDevicePixelRatio(scale);
QPainter p(&scrollBarImage);
opt.rect = QRect(QPoint(0, 0), scrollBarMinSize);
style()->drawComplexControl(QStyle::CC_ScrollBar, &opt, &p);
QRect sourceImageRect = style()->subControlRect(QStyle::CC_ScrollBar, &opt, sc);
sourceImageRect = QRect(sourceImageRect.topLeft() * scale, sourceImageRect.size() * scale);
painter->drawImage(QPoint(0, 0), scrollBarImage, sourceImageRect);
} else {
style()->drawComplexControl(QStyle::CC_ScrollBar, &styleOption, painter);
}
}
void QQuickStyleItemScrollBar::initStyleOption(QStyleOptionSlider &styleOption) const
{
initStyleOptionBase(styleOption);
auto scrollBar = control<QQuickScrollBar>();
switch (m_subControl) {
case Groove:
styleOption.subControls = QStyle::SC_ScrollBarGroove | QStyle::SC_ScrollBarAddLine | QStyle::SC_ScrollBarSubLine;
break;
case Handle:
styleOption.subControls = QStyle::SC_ScrollBarSlider;
break;
case AddLine:
styleOption.subControls = QStyle::SC_ScrollBarAddLine;
break;
case SubLine:
styleOption.subControls = QStyle::SC_ScrollBarSubLine;
break;
}
styleOption.activeSubControls = QStyle::SC_None;
styleOption.orientation = scrollBar->orientation();
if (styleOption.orientation == Qt::Horizontal)
styleOption.state |= QStyle::State_Horizontal;
if (scrollBar->isPressed())
styleOption.state |= QStyle::State_Sunken;
if (m_overrideState != None) {
// In ScrollBar.qml we fade between two versions of
// the handle, depending on if it's hovered or not
if (m_overrideState == AlwaysHovered) {
styleOption.state &= ~QStyle::State_Sunken;
styleOption.activeSubControls = (styleOption.subControls & (QStyle::SC_ScrollBarSlider | QStyle::SC_ScrollBarGroove | QStyle::SC_ScrollBarAddLine | QStyle::SC_ScrollBarSubLine));
} else if (m_overrideState == NeverHovered) {
styleOption.state &= ~QStyle::State_Sunken;
styleOption.activeSubControls &= ~(styleOption.subControls & (QStyle::SC_ScrollBarSlider | QStyle::SC_ScrollBarGroove | QStyle::SC_ScrollBarAddLine | QStyle::SC_ScrollBarSubLine));
} else if (m_overrideState == AlwaysSunken) {
styleOption.state |= QStyle::State_Sunken;
styleOption.activeSubControls = (styleOption.subControls & (QStyle::SC_ScrollBarSlider | QStyle::SC_ScrollBarGroove | QStyle::SC_ScrollBarAddLine | QStyle::SC_ScrollBarSubLine));
}
}
// The following values will let the handle fill 100% of the
// groove / imageSize. But when the handle is resized by
// QQuickScrollBar, it will end up with the correct size visually.
styleOption.pageStep = 1000;
styleOption.minimum = 0;
styleOption.maximum = 1;
styleOption.sliderValue = 0;
}
QT_END_NAMESPACE
#include "moc_qquickstyleitemscrollbar.cpp"
|
