Initial commit

Lts/Plugins/FileManagement/Gui/Explorer/RatioAwareLabel.cpp

@@ -0,0 +1,55 @@
+/**
+  * @RDE_HEADER@
+  * A QLabel that rescales the set pixmap with respect of the current aspect ratio
+  * $Id: flm_preview_file_dialog.cpp 52224 2020-09-30 12:31:15Z ojog_i $
+  * $HeadURL: svn://192.168.133.21/TDS/branches/product/iterations/21_01_chaos/Lts/Plugins/FileManagement/Gui/Explorer/flm_preview_file_dialog.cpp $
+  * $Author: ojog_i $
+  *
+  * Created by Mike Wille, SLTE, 2020-03-03
+  */
+
+#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();
+}