made formal QtUtils class

app/common/qtutils.cpp

@@ -22,7 +22,7 @@
 
 OLIVE_NAMESPACE_ENTER
 
-int QFontMetricsWidth(QFontMetrics fm, const QString& s) {
+int QtUtils::QFontMetricsWidth(QFontMetrics fm, const QString& s) {
 #if QT_VERSION < QT_VERSION_CHECK(5, 11, 0)
   return fm.width(s);
 #else
@@ -30,4 +30,12 @@ int QFontMetricsWidth(QFontMetrics fm, const QString& s) {
 #endif
 }
 
+QFrame *QtUtils::CreateHorizontalLine()
+{
+  QFrame* horizontal_line = new QFrame();
+  horizontal_line->setFrameShape(QFrame::HLine);
+  horizontal_line->setFrameShadow(QFrame::Sunken);
+  return horizontal_line;
+}
+
 OLIVE_NAMESPACE_EXIT

app/common/qtutils.h

@@ -28,19 +28,26 @@
  */
 
 #include <QFontMetrics>
+#include <QFrame>
 
 #include "common/define.h"
 
 OLIVE_NAMESPACE_ENTER
 
-/**
- * @brief Retrieves the width of a string according to certain QFontMetrics
- *
- * QFontMetrics::width() has been deprecatd in favor of QFontMetrics::horizontalAdvance(), but the
- * latter was only introduced in 5.11+. This function wraps the latter for 5.11+ and the former for
- * earlier.
- */
-int QFontMetricsWidth(QFontMetrics fm, const QString& s);
+class QtUtils {
+public:
+  /**
+   * @brief Retrieves the width of a string according to certain QFontMetrics
+   *
+   * QFontMetrics::width() has been deprecatd in favor of QFontMetrics::horizontalAdvance(), but the
+   * latter was only introduced in 5.11+. This function wraps the latter for 5.11+ and the former for
+   * earlier.
+   */
+  static int QFontMetricsWidth(QFontMetrics fm, const QString& s);
+
+  static QFrame* CreateHorizontalLine();
+
+};
 
 OLIVE_NAMESPACE_EXIT