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Fix selection background on Windows

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Janek Bevendorff 2017-02-22 23:23:14 +01:00
parent 79ab7a1062
commit a58700c78f
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1 changed files with 32 additions and 0 deletions
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32
src/gui/CategoryListWidget.cpp
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@ -159,6 +159,33 @@ CategoryListWidgetDelegate::CategoryListWidgetDelegate(QListWidget* parent)
}
}
#ifdef Q_OS_WIN
#include <QProxyStyle>
class WindowsCorrectedStyle : public QProxyStyle
{
public:
void drawPrimitive(PrimitiveElement element, const QStyleOption* option, QPainter* painter, const QWidget* widget) const override
{
painter->save();
if (PE_PanelItemViewItem == element) {
// Qt on Windows draws selection backgrounds only for the actual text/icon
// bounding box, not over the full width of a list item.
// We therefore need to translate and stretch the painter before we can
// tell Qt to draw its native styles.
// Since we are scaling horizontally, we also need to move the right and left
// edge pixels outside the drawing area to avoid thick border lines.
QRect itemRect = subElementRect(QStyle::SE_ItemViewItemFocusRect, option, widget).adjusted(1, 0, 1, 0);
painter->scale(static_cast<float>(option->rect.width()) / itemRect.width(), 1.0);
painter->translate(option->rect.left() - itemRect.left() + 1, 0);
}
QProxyStyle::drawPrimitive(element, option, painter, widget);
painter->restore();
}
};
#endif
void CategoryListWidgetDelegate::paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const
{
QStyleOptionViewItem opt = option;
@ -172,7 +199,12 @@ void CategoryListWidgetDelegate::paint(QPainter* painter, const QStyleOptionView
opt.decorationAlignment = Qt::AlignHCenter | Qt::AlignVCenter;
opt.decorationPosition = QStyleOptionViewItem::Top;
#ifdef Q_OS_WIN
QScopedPointer<QStyle> style(new WindowsCorrectedStyle());
#else
QStyle* style = opt.widget ? opt.widget->style() : QApplication::style();
#endif
style->drawControl(QStyle::CE_ItemViewItem, &opt, painter, opt.widget);
QRect fontRect = painter->fontMetrics().boundingRect(