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#include "./helper.h"
#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0) && QT_VERSION < QT_VERSION_CHECK(6, 3, 0)
#include <QLibraryInfo>
#endif
#include <QApplication>
#include <QFontMetrics>
#include <QMenu>
#include <QMouseEvent>
#include <QPainter>
#include <QPalette>
#include <QPoint>
#include <QStyleHints>
#include <QStyleOptionViewItem>
#include <QTextOption>
#include <QTreeView>
namespace QtGui {
/*!
* \brief Returns on what mouse event the context menu should be shown.
*/
static inline QEvent::Type contextMenuEventType()
{
#if QT_VERSION >= QT_VERSION_CHECK(6, 8, 0)
if (const auto *const hints = QGuiApplication::styleHints()) {
switch (hints->contextMenuTrigger()) {
case Qt::ContextMenuTrigger::Press:
return QEvent::MouseButtonPress;
case Qt::ContextMenuTrigger::Release:
return QEvent::MouseButtonRelease;
default:;
};
}
#endif
#ifdef Q_OS_WINDOWS
return QEvent::MouseButtonRelease;
#else
return QEvent::MouseButtonPress;
#endif
}
BasicTreeView::BasicTreeView(QWidget *parent)
: QTreeView(parent)
, m_contextMenuEventType(contextMenuEventType())
{
// emit customContextMenuRequested() manually because as of Qt 6.8 it otherwise does not work when the widget is
// a child of a popup
setContextMenuPolicy(Qt::NoContextMenu);
}
/*!
* \brief Emits customContextMenuRequested() if context menus are supposed to be shown on \a event.
*/
void BasicTreeView::handleContextMenu(QMouseEvent *event)
{
if (event->button() == Qt::RightButton && event->type() == m_contextMenuEventType) {
emit customContextMenuRequested(event->pos());
}
}
void BasicTreeView::mouseReleaseEvent(QMouseEvent *event)
{
QTreeView::mouseReleaseEvent(event);
handleContextMenu(event);
}
void BasicTreeView::mousePressEvent(QMouseEvent *event)
{
QTreeView::mousePressEvent(event);
handleContextMenu(event);
}
/*!
* \brief Shows \a menu at the specified \a position for the specified \a view.
* \remarks
* - Maps \a position to the viewport of \a view for correct positioning for mouse events.
* - The hack to map coordinates to top-level widget (to workaround behavior fixed by Qt commit
* d0b5adb3b28bf5b9d94ef46cecf402994e7c5b38) is no longer necassary as the code no uses mouse
* events directly (instead of the context menu event).
*/
void showViewMenu(const QPoint &position, const QTreeView &view, QMenu &menu)
{
menu.exec(view.viewport()->mapToGlobal(position));
}
void drawBasicItemViewItem(QPainter &painter, const QStyleOptionViewItem &option)
{
if (auto *const style = option.widget ? option.widget->style() : QApplication::style()) {
style->drawControl(QStyle::CE_ItemViewItem, &option, &painter, option.widget);
}
}
void setupPainterToDrawViewItemText(QPainter *painter, QStyleOptionViewItem &opt)
{
painter->setFont(opt.font);
if (!(opt.state & QStyle::State_Selected)) {
painter->setPen(opt.palette.color(QPalette::Text));
return;
}
// set pen/palette in accordance with the Windows 11 or Windows Vista style for selected items
// note: These styles unfortunately don't just use the highlighted text color and just using it would
// lead to a very bad contrast.
#if defined(Q_OS_WINDOWS) && QT_VERSION >= QT_VERSION_CHECK(6, 1, 0)
auto *const style = opt.widget ? opt.widget->style() : nullptr;
const auto styleName = style ? style->name() : QString();
if (styleName.compare(QLatin1String("windows11"), Qt::CaseInsensitive) == 0) {
painter->setPen(QPen(opt.palette.buttonText().color()));
return;
} else if (styleName.compare(QLatin1String("windowsvista"), Qt::CaseInsensitive) == 0) {
opt.palette.setColor(QPalette::All, QPalette::HighlightedText, opt.palette.color(QPalette::Active, QPalette::Text));
opt.palette.setColor(QPalette::All, QPalette::Highlight, opt.palette.base().color().darker(108));
}
#endif
painter->setPen(opt.palette.color(QPalette::HighlightedText));
}
void drawField(const QStyledItemDelegate *delegate, QPainter *painter, QStyleOptionViewItem &opt, const QModelIndex &index, int detailRole)
{
// init style options to use drawControl(), except for the text
opt.text.clear();
opt.features = QStyleOptionViewItem::None;
drawBasicItemViewItem(*painter, opt);
const auto fieldName = delegate->displayText(index.data(Qt::DisplayRole), opt.locale);
const auto fieldValue = delegate->displayText(index.data(detailRole), opt.locale);
// draw icon
auto iconRect
= QRect(opt.rect.x() + listItemPadding, opt.rect.y() + centerObj(opt.rect.height(), listItemIconSize), listItemIconSize, listItemIconSize);
painter->drawPixmap(iconRect, index.data(Qt::DecorationRole).value<QIcon>().pixmap(listItemIconSize, listItemIconSize));
// compute rectangle for field name and value
auto textRect = QRectF(opt.rect);
textRect.setX(iconRect.right() + listItemSpacing);
textRect.setWidth(textRect.width() - listItemPadding);
auto textOption = QTextOption();
textOption.setWrapMode(QTextOption::NoWrap);
textOption.setAlignment(opt.displayAlignment);
auto fieldNameRect = painter->boundingRect(textRect, fieldName, textOption);
// draw field name
setupPainterToDrawViewItemText(painter, opt);
painter->drawText(textRect, fieldName, textOption);
// draw status text
textOption.setAlignment(Qt::AlignRight | Qt::AlignVCenter);
textRect.setX(textRect.x() + fieldNameRect.width() + listItemSpacing);
painter->drawText(textRect, painter->fontMetrics().elidedText(fieldValue, Qt::ElideRight, static_cast<int>(textRect.width())), textOption);
}
void drawIdAndStatus(const QStyledItemDelegate *delegate, QPainter *painter, QStyleOptionViewItem &opt, const QModelIndex &index,
int statusStringRole, int statusColorRole, int buttonWidth)
{
const auto id = delegate->displayText(index.data(Qt::DisplayRole), opt.locale);
const auto statusText = delegate->displayText(index.data(statusStringRole), opt.locale);
// init style options to use drawControl(), except for the text
opt.text.clear();
opt.features = QStyleOptionViewItem::None;
drawBasicItemViewItem(*painter, opt);
// draw icon
auto iconRect
= QRect(opt.rect.x() + listItemPadding, opt.rect.y() + centerObj(opt.rect.height(), listItemIconSize), listItemIconSize, listItemIconSize);
painter->drawPixmap(iconRect, index.data(Qt::DecorationRole).value<QIcon>().pixmap(listItemIconSize, listItemIconSize));
// compute rectangle for label/ID and rectangle for status text
auto textRect = QRectF(opt.rect);
textRect.setX(iconRect.right() + listItemSpacing);
textRect.setWidth(textRect.width() - buttonWidth);
auto textOption = QTextOption();
textOption.setWrapMode(QTextOption::NoWrap);
textOption.setAlignment(Qt::AlignRight | Qt::AlignVCenter);
auto statusTextRect = painter->boundingRect(textRect, statusText, textOption);
textRect.setWidth(textRect.width() - statusTextRect.width());
// draw label/ID
textOption.setAlignment(opt.displayAlignment);
setupPainterToDrawViewItemText(painter, opt);
painter->drawText(textRect, painter->fontMetrics().elidedText(id, Qt::ElideRight, static_cast<int>(textRect.width())), textOption);
// draw status text
if (const auto color = index.data(statusColorRole).value<QColor>(); color.isValid()) {
opt.palette.setColor(QPalette::Text, color);
}
textOption.setAlignment(Qt::AlignRight);
setupPainterToDrawViewItemText(painter, opt);
painter->drawText(statusTextRect, statusText, textOption);
}
} // namespace QtGui
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