use C++ features to show price

src/core/article.cpp

@@ -29,9 +29,9 @@ int Article::getPrice() const { return price_; }
 
 std::string Article::getPriceAsString() const
 {
-    double sumInEuro = price_ / 100.0L;
     std::stringstream sumStream;
-    sumStream << std::fixed << std::setprecision(2) << sumInEuro << " €";
+    sumStream.imbue(std::locale("de_DE.utf8"));
+    sumStream << std::right << std::setw(12) << std::showbase << std::put_money(price_, false);
     return sumStream.str();
 }
 

src/gui/basketmodel.cpp

@@ -1,5 +1,7 @@
 #include "basketmodel.h"
 
+#include <QFont>
+
 BasketModel::BasketModel(Marketplace* market, QObject* parent)
     : QAbstractTableModel(parent), marketplace_(market)
 {
@@ -14,6 +16,22 @@ int BasketModel::columnCount([[maybe_unused]] const QModelIndex& parent) const {
 
 QVariant BasketModel::data(const QModelIndex& index, int role) const
 {
+    if (role == Qt::FontRole) {
+        QFont myFont;
+
+        switch (index.column()) {
+        case 0:
+            [[fallthrough]];
+        case 1:
+            [[fallthrough]];
+        case 2:
+            return myFont;
+        case 3:
+            myFont.setFamily("monospace");
+            return myFont;
+        }
+    }
+
     if (role != Qt::DisplayRole)
         return QVariant();
 
@@ -30,7 +48,7 @@ QVariant BasketModel::data(const QModelIndex& index, int role) const
     case 2:
         return article->getSeller()->getSellerNo();
     case 3:
-        //return article->getPrice();
+        // return article->getPrice();
         return article->getPriceAsString().c_str();
     default:
         return "???";

src/gui/pricedialog.ui

@@ -2,6 +2,14 @@
 <ui version="4.0">
  <class>PriceDialog</class>
  <widget class="QDialog" name="PriceDialog">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>171</width>
+    <height>71</height>
+   </rect>
+  </property>
   <property name="windowTitle">
    <string>Artikelpreis</string>
   </property>
@@ -19,7 +27,14 @@
       </widget>
      </item>
      <item row="0" column="1">
-      <widget class="QDoubleSpinBox" name="priceSpinBox"/>
+      <widget class="QDoubleSpinBox" name="priceSpinBox">
+       <property name="maximum">
+        <double>999.990000000000009</double>
+       </property>
+       <property name="singleStep">
+        <double>0.500000000000000</double>
+       </property>
+      </widget>
      </item>
      <item row="1" column="0">
       <widget class="QLabel" name="label_2">