Use resource file

Use Qt resource files, compile it to Python to obtain a window that
has an icon!

Finally!

It is still using the Oxygen icon for Database, since I have nothing
better to use.

.gitignore

@@ -3,4 +3,4 @@
 relational_gui/survey.py
 relational_gui/maingui.py
 relational_gui/rel_edit.py
-
+relational_gui/resources.py

Makefile

@@ -4,6 +4,7 @@ pyqt:
 	pyuic5 relational_gui/survey.ui > relational_gui/survey.py
 	pyuic5 relational_gui/maingui.ui > relational_gui/maingui.py
 	pyuic5 relational_gui/rel_edit.ui > relational_gui/rel_edit.py
+	pyrcc5 relational_gui/resources.qrc > relational_gui/resources.py
 
 uninstall:
 	rm -rf /opt/relational

relational_gui.py

@@ -85,7 +85,7 @@ if __name__ == "__main__":
         import sip  # needed on windows
         from PyQt5 import QtGui, QtWidgets
         try:
-            from relational_gui import maingui, guihandler, about, surveyForm
+            from relational_gui import maingui, guihandler, about, surveyForm, resources
         except:
             print (
                 "Module relational_gui is missing.\nPlease install relational package.",

relational_gui/maingui.ui

@@ -20,6 +20,10 @@
   <property name="windowTitle">
    <string>Relational</string>
   </property>
+  <property name="windowIcon">
+   <iconset>
+    <normaloff>:/icon</normaloff>:/icon</iconset>
+  </property>
   <widget class="QWidget" name="centralwidget">
    <layout class="QVBoxLayout" name="verticalLayout">
     <property name="spacing">

relational_gui/resources.qrc

@@ -0,0 +1,5 @@
+<!DOCTYPE RCC><RCC version="1.0">
+<qresource>
+    <file alias="icon">resources/relational.png</file>
+</qresource>
+</RCC>