Adds initial intermediate qt6 porting state

qt6-after/qt6-migrated-legatus/Lts/Plugins/FileManagement/Gui/Explorer/RatioAwareLabel.cpp

@@ -0,0 +1,48 @@
+
+
+
+#include "RatioAwareLabel.h"
+
+
+RatioAwareLabel::RatioAwareLabel(QWidget *parent)
+  : QLabel(parent)
+{
+  setScaledContents(false);
+}
+
+
+void RatioAwareLabel::setPixmap(const QPixmap &pixmap)
+{
+  m_pixmap = pixmap;
+  scale();
+}
+
+
+int RatioAwareLabel::heightRatio(int width) const
+{
+  if (m_pixmap.isNull())
+    return height();
+  return (m_pixmap.height() * width / m_pixmap.width());
+}
+
+
+QSize RatioAwareLabel::sizeHint() const
+{
+  int w = width();
+  return QSize(w, heightRatio(w));
+}
+
+
+void RatioAwareLabel::scale()
+{
+  if (m_pixmap.isNull())
+    return;
+  QLabel::setPixmap(m_pixmap.scaled(size(), Qt::KeepAspectRatio, Qt::FastTransformation));
+}
+
+
+void RatioAwareLabel::resizeEvent(QResizeEvent *event)
+{
+  QLabel::resizeEvent(event);
+  scale();
+}