Add translations that are changeable during runtime

10 files changed, 275 insertions, 9 deletions

diff --git a/GUI_SS2015.pro b/GUI_SS2015.pro
index f6527fc..263d369 100644
--- a/GUI_SS2015.pro
+++ b/GUI_SS2015.pro
@@ -15,11 +15,20 @@ TEMPLATE = app
 SOURCES += main.cpp\
         mainwindow.cpp \
     dlgpreferences.cpp \
-    interactioncanvas.cpp
+    interactioncanvas.cpp \
+    languagedialog.cpp
 
 HEADERS  += mainwindow.h \
     dlgpreferences.h \
-    interactioncanvas.h
+    interactioncanvas.h \
+    languagedialog.h
 
 FORMS    += mainwindow.ui \
-    dlgpreferences.ui
+    dlgpreferences.ui \
+    languagedialog.ui
+
+TRANSLATIONS += \
+    german.ts
+
+RESOURCES += \
+    translations.qrc
diff --git a/german.qm b/german.qm
new file mode 100644
index 0000000..ed7e949
--- /dev/null
+++ b/german.qm
diff --git a/languagedialog.cpp b/languagedialog.cpp
new file mode 100644
index 0000000..c470a30
--- /dev/null
+++ b/languagedialog.cpp
@@ -0,0 +1,52 @@
+#include "languagedialog.h"
+#include "ui_languagedialog.h"
+
+LanguageDialog::LanguageDialog(QWidget *parent) :
+    QDialog(parent),
+    ui(new Ui::LanguageDialog)
+{
+    ui->setupUi(this);
+}
+
+LanguageDialog::~LanguageDialog()
+{
+    delete ui;
+}
+
+int LanguageDialog::language() const
+{
+    return m_language;
+}
+
+void LanguageDialog::setLanguage(int arg)
+{
+    if (m_language == arg)
+    {
+        return;
+    }
+
+    switch (arg)
+    {
+    case 0:
+        ui->radioButtonEnglish->setChecked(true);
+        break;
+
+    case 1:
+        ui->radioButtonGerman->setChecked(true);
+        break;
+    }
+
+    m_language = arg;
+    emit languageChanged(arg);
+}
+
+void LanguageDialog::on_radioButtonEnglish_clicked()
+{
+    m_language = 0;
+}
+
+
+void LanguageDialog::on_radioButtonGerman_clicked()
+{
+    m_language = 1;
+}
diff --git a/languagedialog.h b/languagedialog.h
new file mode 100644
index 0000000..4dd0c61
--- /dev/null
+++ b/languagedialog.h
@@ -0,0 +1,38 @@
+#ifndef LANGUAGEDIALOG_H
+#define LANGUAGEDIALOG_H
+
+#include <QDialog>
+#include <QTranslator>
+
+namespace Ui {
+class LanguageDialog;
+}
+
+class LanguageDialog : public QDialog
+{
+    Q_OBJECT
+    Q_PROPERTY(int language READ language WRITE setLanguage NOTIFY languageChanged)
+
+public:
+    explicit LanguageDialog(QWidget *parent = 0);
+    ~LanguageDialog();
+
+    int language() const;
+
+public slots:
+    void setLanguage(int arg);
+
+signals:
+    void languageChanged(int arg);
+
+private slots:
+    void on_radioButtonEnglish_clicked();
+
+    void on_radioButtonGerman_clicked();
+
+private:
+    Ui::LanguageDialog *ui;
+    int m_language;
+};
+
+#endif // LANGUAGEDIALOG_H
diff --git a/languagedialog.ui b/languagedialog.ui
new file mode 100644
index 0000000..366541b
--- /dev/null
+++ b/languagedialog.ui
@@ -0,0 +1,87 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>LanguageDialog</class>
+ <widget class="QDialog" name="LanguageDialog">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>400</width>
+    <height>300</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Dialog</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <item>
+    <widget class="QGroupBox" name="groupBox">
+     <property name="title">
+      <string>Language</string>
+     </property>
+     <layout class="QVBoxLayout" name="verticalLayout_2">
+      <item>
+       <widget class="QRadioButton" name="radioButtonEnglish">
+        <property name="text">
+         <string>Eng&amp;lish</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QRadioButton" name="radioButtonGerman">
+        <property name="text">
+         <string>Deuts&amp;ch</string>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <widget class="QDialogButtonBox" name="buttonBox">
+     <property name="orientation">
+      <enum>Qt::Horizontal</enum>
+     </property>
+     <property name="standardButtons">
+      <set>QDialogButtonBox::Cancel|QDialogButtonBox::Ok</set>
+     </property>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>accepted()</signal>
+   <receiver>LanguageDialog</receiver>
+   <slot>accept()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>248</x>
+     <y>254</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>157</x>
+     <y>274</y>
+    </hint>
+   </hints>
+  </connection>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>rejected()</signal>
+   <receiver>LanguageDialog</receiver>
+   <slot>reject()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>316</x>
+     <y>260</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>286</x>
+     <y>274</y>
+    </hint>
+   </hints>
+  </connection>
+ </connections>
+</ui>
diff --git a/main.cpp b/main.cpp
index b48f94e..0649a69 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,9 +1,16 @@
 #include "mainwindow.h"
 #include <QApplication>
+#include <QLocale>
+#include <QTranslator>
 
 int main(int argc, char *argv[])
 {
     QApplication a(argc, argv);
+
+//    QTranslator translator;
+//    translator.load(":/translations.pm");
+//    a.installTranslator(&translator);
+
     MainWindow w;
     w.show();
 
diff --git a/mainwindow.cpp b/mainwindow.cpp
index 5a548db..8bc0a22 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -26,17 +26,17 @@ void MainWindow::on_actionPreferences_triggered()
     tmp->setHeight(size().height());
     tmp->setWidth(size().width());
 
-    if(tmp->exec())
+    if (tmp->exec())
     {
         qDebug() << "DlgPreferences okay clicked.";
 
         int width = tmp->Width();
         int height = tmp->Height();
 
-        if(width >= 100 && width <= 800 && height >= 100 && height <= 800)
+        if (width >= 100 && width <= 800 && height >= 100 && height <= 800)
         {
             qDebug() << "Resizing QMainWindow.";
-            resize(width,height);
+            resize(width, height);
         }
     }
 
@@ -44,7 +44,62 @@ void MainWindow::on_actionPreferences_triggered()
 }
 
 
+void MainWindow::on_actionLanguage_triggered()
+{
+    LanguageDialog *tmp = new LanguageDialog(this);
+
+    if (QLocale::system().language() == QLocale::German)
+    {
+        tmp->setLanguage(1);
+    }
+    else
+    {
+        tmp->setLanguage(0);
+    }
+
+    if (tmp->exec())
+    {
+        switch (tmp->language())
+        {
+        case 0:
+            qDebug() << "English";
+            loadLanguage(":/english.qm");
+
+            break;
+
+        case 1:
+            qDebug() << "German";
+            loadLanguage(":/german.qm");
+
+            break;
+        }
+    }
+}
+
+
 void MainWindow::mouseMoveEvent(QMouseEvent *mouseEvent)
 {
     qDebug() << "MainWindow:" << mouseEvent->pos();
 }
+
+void MainWindow::loadLanguage(const QString& rLanguageFile)
+{
+    // remove the old translator
+    qApp->removeTranslator(&m_translator);
+
+    // load the new translator
+    if (m_translator.load(rLanguageFile))
+    {
+        qApp->installTranslator(&m_translator);
+    }
+}
+
+void MainWindow::changeEvent(QEvent *event)
+{
+    if (event != 0 && event->type() == QEvent::LanguageChange)
+    {
+        ui->retranslateUi(this);
+    }
+
+    QMainWindow::changeEvent(event);
+}
diff --git a/mainwindow.h b/mainwindow.h
index 410878f..10976c4 100644
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -6,6 +6,7 @@
 #include <QMouseEvent>
 #include "dlgpreferences.h"
 #include "interactioncanvas.h"
+#include "languagedialog.h"
 
 namespace Ui {
 class MainWindow;
@@ -22,14 +23,20 @@ public:
     explicit MainWindow(QWidget *parent = 0);
     ~MainWindow();
 
+    void loadLanguage(const QString &rLanguageFile);
+
+protected:
+    void mouseMoveEvent(QMouseEvent *mouseEvent);
+
 private slots:
     void on_actionPreferences_triggered();
+    void on_actionLanguage_triggered();
+
+    void changeEvent(QEvent *event);
 private:
     Ui::MainWindow *ui;
+    QTranslator m_translator; // contains the translations for this application
 
-    // QWidget interface
-protected:
-    void mouseMoveEvent(QMouseEvent *mouseEvent);
 };
 
 #endif // MAINWINDOW_H
diff --git a/mainwindow.ui b/mainwindow.ui
index 8e92663..209a4b9 100644
--- a/mainwindow.ui
+++ b/mainwindow.ui
@@ -37,6 +37,7 @@
      <string>Edi&amp;t</string>
     </property>
     <addaction name="actionPreferences"/>
+    <addaction name="actionLanguage"/>
    </widget>
    <widget class="QMenu" name="menuHelp">
     <property name="title">
@@ -66,6 +67,11 @@
     <string>&amp;About</string>
    </property>
   </action>
+  <action name="actionLanguage">
+   <property name="text">
+    <string>&amp;Language</string>
+   </property>
+  </action>
  </widget>
  <layoutdefault spacing="6" margin="11"/>
  <resources/>
diff --git a/translations.qrc b/translations.qrc
new file mode 100644
index 0000000..dabca70
--- /dev/null
+++ b/translations.qrc
@@ -0,0 +1,5 @@
+<RCC>
+    <qresource prefix="/">
+        <file>german.qm</file>
+    </qresource>
+</RCC>