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#include "IconDelegate.h"
#include <QDebug>
#include <QHBoxLayout>
#include <QHeaderView>
#include <QLabel>
#include <QPainter>
#include <QPixmapCache>
#include <algorithm>
#include <log.h>
namespace GUI
{
using namespace MOBase;
constexpr int MAX_WIDTH = 16;
constexpr int MARGIN_X = 4;
IconDelegate::IconDelegate(QTreeView* view, int column, int compactSize)
: QStyledItemDelegate(view), m_Column{column}, m_CompactSize{compactSize},
m_Compact{false}
{
if (view) {
connect(view->header(), &QHeaderView::sectionResized,
[this](int logicalIndex, [[maybe_unused]] int oldSize, int newSize) {
if (logicalIndex == m_Column) {
m_Compact = newSize < m_CompactSize;
}
});
}
}
void IconDelegate::paintIcons(QPainter* painter, const QStyleOptionViewItem& option,
[[maybe_unused]] const QModelIndex& index,
const QList<QString>& icons)
{
int x = MARGIN_X;
painter->save();
int iconWidth =
icons.size() > 0 ? ((option.rect.width() / icons.size()) - MARGIN_X) : MAX_WIDTH;
// Clamp to at least 8px so narrow columns don't make QIcon::pixmap()
// return null and spuriously log "failed to load icon".
iconWidth = std::clamp(iconWidth, 8, MAX_WIDTH);
const int margin = (option.rect.height() - iconWidth) / 2;
painter->translate(option.rect.topLeft());
for (const QString& iconId : icons) {
if (iconId.isEmpty()) {
x += iconWidth + MARGIN_X;
continue;
}
QPixmap icon;
const QString fullIconId = QString("%1_%2").arg(iconId).arg(iconWidth);
if (!QPixmapCache::find(fullIconId, &icon)) {
icon = QIcon(iconId).pixmap(iconWidth, iconWidth);
if (icon.isNull()) {
log::warn("failed to load icon {}", iconId);
}
QPixmapCache::insert(fullIconId, icon);
}
painter->drawPixmap(x, margin, iconWidth, iconWidth, icon);
x += iconWidth + MARGIN_X;
}
painter->restore();
}
void IconDelegate::paint(QPainter* painter, const QStyleOptionViewItem& option,
const QModelIndex& index) const
{
if (auto* const w = qobject_cast<QAbstractItemView*>(parent())) {
w->itemDelegate()->paint(painter, option, index);
} else {
QStyledItemDelegate::paint(painter, option, index);
}
paintIcons(painter, option, index, getIcons(index));
}
QSize IconDelegate::sizeHint(const QStyleOptionViewItem& option,
const QModelIndex& index) const
{
return QSize(getNumIcons(index) * (MAX_WIDTH + MARGIN_X), option.rect.height());
}
} // namespace GUI
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