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fix(viewer): optimize image scaling behavior for selection states #173

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Merged
deepin-bot merged 1 commit into from
Dec 29, 2025
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fix(viewer): optimize image scaling behavior for selection states #173

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14 changes: 12 additions & 2 deletions libimageviewer/viewpanel/contents/imgviewdelegate.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -161,10 +161,20 @@ void LibImgViewDelegate::paint(QPainter *painter, const QStyleOptionViewItem &op
QPainterPath bp1;
bp1.addRoundedRect(pixmapRect, 4, 4);
painter->setClipPath(bp1);
_pixmap = _pixmap.scaled(pixmapRect.size(), Qt::KeepAspectRatioByExpanding, Qt::SmoothTransformation);
// 根据选中状态使用不同的缩放模式
if (backgroundRect.width() != LibImgViewListView::ITEM_NORMAL_WIDTH) {
// 选中状态：保持宽高比
_pixmap = _pixmap.scaled(pixmapRect.size(), Qt::KeepAspectRatio, Qt::SmoothTransformation);
} else {
// 未选中状态：填充整个区域
_pixmap = _pixmap.scaled(pixmapRect.size(), Qt::KeepAspectRatioByExpanding, Qt::SmoothTransformation);
}
qreal adjustx = _pixmap.width() - pixmapRect.width();
qreal adjusty = _pixmap.height() - pixmapRect.height();
painter->drawImage(pixmapRect,_pixmap,_pixmap.rect().adjusted(adjustx / 2, -adjusty / 2, -adjustx / 2, adjusty / 2));

// 修复：居中显示时，偏移量应该是正值，负责旋转时计算
QRect sourceRect = _pixmap.rect().adjusted(adjustx / 2, adjusty / 2, -adjustx / 2, -adjusty / 2);
painter->drawImage(pixmapRect, _pixmap, sourceRect);

painter->restore();
}
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