Add Qt 5.9 compatibility (#202)

* Added Ubuntu 18 backwards compatibility

Co-authored-by: Cents02 <Cents02@Cents0.me>

src/aolineedit.cpp

@@ -11,8 +11,11 @@ void AOLineEdit::mouseDoubleClickEvent(QMouseEvent *e)
 void AOLineEdit::focusOutEvent(QFocusEvent *ev)
 {
   int start = selectionStart();
-  int len = selectionEnd() - start; // We're not using selectionLength because
-                                    // Linux build doesn't run qt5.10
+#if QT_VERSION >= QT_VERSION_CHECK(5, 10, 0)
+  int len = selectionLength();
+#else
+  int len = selectedText().length();
+#endif
   QLineEdit::focusOutEvent(ev);
   if (p_selection && start != -1 && len != -1)
     this->setSelection(start, len);

src/courtroom.cpp

@@ -1903,8 +1903,12 @@ void Courtroom::handle_chatmessage_2()
       ui_vp_chatbox->set_image("chatbox");
 
     QFontMetrics fm(ui_vp_showname->font());
+// Gotta support the slow paced ubuntu 18 STUCK IN 5.9.5!!
+#if QT_VERSION > QT_VERSION_CHECK(5, 11, 0)
     int fm_width = fm.horizontalAdvance(ui_vp_showname->text());
-
+#else
+    int fm_width = fm.boundingRect((ui_vp_showname->text())).width();
+#endif
     QString chatbox_path = ao_app->get_theme_path("chat");
     QString chatbox = ao_app->get_chat(m_chatmessage[CHAR_NAME]);
     QString customchar;
@@ -1917,7 +1921,8 @@ void Courtroom::handle_chatmessage_2()
         ui_vp_chatbox->set_chatbox(chatbox_path + "box");
     }
 
-    //This should probably be called only if any change from the last chat arrow was actually detected.
+    // This should probably be called only if any change from the last chat
+    // arrow was actually detected.
     pos_size_type design_ini_result = ao_app->get_element_dimensions(
         "chat_arrow", "courtroom_design.ini", customchar);
     if (design_ini_result.width < 0 || design_ini_result.height < 0) {
@@ -3051,11 +3056,13 @@ void Courtroom::handle_song(QStringList *p_contents)
                                     (f_song_clear.lastIndexOf("/") + 1));
   int n_char = f_contents.at(1).toInt();
 
-  //Assume the song doesn't loop unless told otherwise (due to most outdated servers handling looping through serverside)
+  // Assume the song doesn't loop unless told otherwise (due to most outdated
+  // servers handling looping through serverside)
   bool looping = false;
-  //Channel 0 is the 'master music', other channels would commonly be used for ambience
+  // Channel 0 is the 'master music', other channels would commonly be used for
+  // ambience
   int channel = 0;
-  //No effects assumed by default - vanilla functionality
+  // No effects assumed by default - vanilla functionality
   int effect_flags = 0;
 
   if (n_char < 0 || n_char >= char_list.size()) {
@@ -4340,7 +4347,12 @@ void Courtroom::on_text_color_changed(int p_color)
     if (markdown_end.isEmpty())
       markdown_end = markdown_start;
     int start = ui_ic_chat_message->selectionStart();
+#if QT_VERSION >= QT_VERSION_CHECK(5, 10, 0)
     int end = ui_ic_chat_message->selectionEnd() + 1;
+#else
+    int end = ui_ic_chat_message->selectedText().length() + 1;
+#endif
+
     ui_ic_chat_message->setCursorPosition(start);
     ui_ic_chat_message->insert(markdown_start);
     ui_ic_chat_message->setCursorPosition(end);

src/hardware_functions.cpp

@@ -3,7 +3,7 @@
 #include <QDebug>
 #include <QtGlobal>
 
-#if QT_VERSION < QT_VERSION_CHECK(5, 4, 0)
+#if QT_VERSION < QT_VERSION_CHECK(5, 11, 0)
 
 #if (defined(_WIN32) || defined(_WIN64))
 #include <windows.h>

src/scrolltext.cpp

@@ -34,8 +34,12 @@ void ScrollText::setSeparator(QString separator)
 void ScrollText::updateText()
 {
   timer.stop();
-
+#if QT_VERSION > QT_VERSION_CHECK(5, 11, 0)
   singleTextWidth = fontMetrics().horizontalAdvance(_text);
+#else
+  singleTextWidth = fontMetrics().boundingRect(_text).width();
+#endif
+
   scrollEnabled = (singleTextWidth > width() - leftMargin * 2);
 
   if (scrollEnabled) {
@@ -47,8 +51,14 @@ void ScrollText::updateText()
     staticText.setText(_text);
 
   staticText.prepare(QTransform(), font());
+#if QT_VERSION > QT_VERSION_CHECK(5, 11, 0)
   wholeTextSize = QSize(fontMetrics().horizontalAdvance(staticText.text()),
                         fontMetrics().height());
+#else
+  wholeTextSize = QSize(fontMetrics().boundingRect(staticText.text()).width(),
+                        fontMetrics().height());
+#endif
+
 }
 
 void ScrollText::paintEvent(QPaintEvent *)