ugly hackl to allow umlauts in pos text

src/gui/settingsdialog.cpp

@@ -14,12 +14,12 @@ SettingsDialog::SettingsDialog(QWidget* parent, Qt::WindowFlags f) : QDialog(par
 
     QSettings settings{};
     int cashPointNo = settings.value("global/cashPointNo").toInt();
-    QString posPrinterDevice = settings.value("global/posPrinterDevice").toString();
+    //QString posPrinterDevice = settings.value("global/posPrinterDevice").toString();
     int feeInPercent = settings.value("global/feeInPercent").toInt();
     int maxFeeInEuro = settings.value("global/maxFeeInEuro").toInt();
 
     ui_.cashPointNoSpinBox->setValue(cashPointNo);
-    ui_.posPrinterDeviceEdit->setText(posPrinterDevice);
+    //ui_.posPrinterDeviceEdit->setText(posPrinterDevice);
     ui_.feePercentSpinBox->setValue(feeInPercent);
     ui_.maxFeeSpinBox->setValue(maxFeeInEuro);
 
@@ -32,7 +32,10 @@ SettingsDialog::SettingsDialog(QWidget* parent, Qt::WindowFlags f) : QDialog(par
             QMessageBox(QMessageBox::Icon::Warning, "Bondrucker Fehler",
                         QString("Test schlug fehl: ") + err.what(), QMessageBox::StandardButton::Ok, this)
                 .exec();
+                this->ui_.posPrinterDeviceEdit->setText("<nicht gefunden>");
+                return;
         }
+        this->ui_.posPrinterDeviceEdit->setText("<gefunden>");
     });
 }
 
@@ -43,7 +46,7 @@ void SettingsDialog::accept()
     int oldCashPointNo = settings.value("global/cashPointNo").toInt();
     int newCashPointNo = ui_.cashPointNoSpinBox->value();
 
-    settings.setValue("global/posPrinterDevice", ui_.posPrinterDeviceEdit->text());
+    //settings.setValue("global/posPrinterDevice", ui_.posPrinterDeviceEdit->text());
     settings.setValue("global/feeInPercent", ui_.feePercentSpinBox->value());
     settings.setValue("global/maxFeeInEuro", ui_.maxFeeSpinBox->value());
 

src/gui/settingsdialog.ui

@@ -2,6 +2,14 @@
 <ui version="4.0">
  <class>SettingsDialog</class>
  <widget class="QDialog" name="SettingsDialog">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>400</width>
+    <height>180</height>
+   </rect>
+  </property>
   <property name="windowTitle">
    <string>Einstellungen</string>
   </property>
@@ -24,7 +32,11 @@
     </widget>
    </item>
    <item row="1" column="1">
-    <widget class="QLineEdit" name="posPrinterDeviceEdit"/>
+    <widget class="QLineEdit" name="posPrinterDeviceEdit">
+     <property name="enabled">
+      <bool>false</bool>
+     </property>
+    </widget>
    </item>
    <item row="1" column="2">
     <widget class="QPushButton" name="testPosPrinterButton">

src/printer/CMakeLists.txt

@@ -1,3 +1,7 @@
+set(Boost_USE_STATIC_LIBS ON)
+
+find_package(Boost 1.62 REQUIRED)
+
 find_package(LibUSB REQUIRED)
 
 set(PRINTER_SOURCES

src/printer/posprinter.cpp

@@ -1,9 +1,11 @@
 #include "posprinter.h"
 
+#include <algorithm>
 #include <exception>
 #include <iostream>
 #include <sstream>
 #include <string>
+#include <boost/algorithm/string.hpp>
 
 const std::string PosPrinter::Command::RESET = {0x1b, 0x40};
 const std::string PosPrinter::Command::ENCODING = {'\x1b', '\x74', 16};
@@ -90,10 +92,22 @@ void PosPrinter::write(const std::string& text)
 {
     if (devicePtr_ == NULL)
         return;
-    int length = text.length();
+
+    using namespace std::string_literals;
+    std::string text_escaped = text;
+    boost::replace_all(text_escaped, "ä", "\xe4");
+    boost::replace_all(text_escaped, "ö", "\xf6");
+    boost::replace_all(text_escaped, "ü", "\xfc");
+    boost::replace_all(text_escaped, "Ä", "\xc4");
+    boost::replace_all(text_escaped, "Ö", "\xd6");
+    boost::replace_all(text_escaped, "Ü", "\xdc");
+    boost::replace_all(text_escaped, "€", "\x80");
+
+    int length = text_escaped.length();
     int actual{0};
-    int retValue = libusb_bulk_transfer(devicePtr_, (0x03 | LIBUSB_ENDPOINT_OUT),
+    int retValue =
-                                        (unsigned char*)text.c_str(), length, &actual, 10000);
+        libusb_bulk_transfer(devicePtr_, (0x03 | LIBUSB_ENDPOINT_OUT),
+                             (unsigned char*)text_escaped.c_str(), length, &actual, 10000);
     if (retValue != 0 || actual != length)
         std::cerr << "Write Error" << std::endl;
 }
@@ -116,7 +130,7 @@ void PosPrinter::printTest()
     std::stringstream commandStream;
     commandStream << Command::ENCODING;
     commandStream << "Der Drucker kann von KIMA2\nangesprochen werden.\n\n"
-                  << u8"Beachten Sie, dass nicht\nalle Modelle Strichcodes\nausdrucken können.";
+                  << "Beachten Sie, dass nicht\nalle Modelle Strichcodes\nausdrucken können.";
     commandStream << Command::FEED;
     printHeader();
     write(commandStream.str());