Fixed barcode scanner issue on Windows with czech keyboard.

core/helper.cpp

@@ -0,0 +1,39 @@
+#include "helper.h"
+#include "define.h"
+
+const QMap<QString, QString> Helper::m_numMap{
+    {"+", "1"},
+    {"ě", "2"},
+    {"š", "3"},
+    {"č", "4"},
+    {"ř", "5"},
+    {"ž", "6"},
+    {"ý", "7"},
+    {"á", "8"},
+    {"í", "9"},
+    {"é", "0"}
+};
+
+Helper::Helper()
+{
+}
+
+QString Helper::replaceByNumbers(const QString &str)
+{
+    QString ret;
+
+    std::for_each(ALL(str), [&](QChar c){
+        QString replaced = m_numMap[c];
+
+        if (replaced.isEmpty())
+        {
+            ret.append(c);
+        }
+        else
+        {
+            ret.append(replaced);
+        }
+    });
+
+    return ret;
+}