gui: reload disk space usage and availability after every rb change

lib/gui/gui.py

@@ -26,7 +26,7 @@ class SuGui(QtWidgets.QMainWindow):
         self.show()
         # setting some defaults
         self.setWindowTitle(Su.name_and_version())
-        self.lineEdit_dump_file.setText(self._get_default_dump_file_path())
+        self._set_default_dump_file_path()
         self.lineEdit_dump_file.setCursorPosition(0)
         self.refresh_hw_button()
         # button events
@@ -116,6 +116,8 @@ class SuGui(QtWidgets.QMainWindow):
                                           "" + Disk.sizeof_fmt(free_disk_space))
             if free_disk_space - self._calculate_needed_disk_space() < 0:
                 self.label_disk_space.setStyleSheet('color: red')
+            else:
+                self.label_disk_space.setStyleSheet('color: black')
 
 
     def _get_default_dump_file_path(self):
@@ -179,6 +181,7 @@ class SuGui(QtWidgets.QMainWindow):
         self.label_status. \
             setText("Needed disk space:\n" \
                     "" + needed_disk_space)
+        self.check_dump_file_path()
 
     def _calculate_needed_disk_space(self):
         """
@@ -201,3 +204,9 @@ class SuGui(QtWidgets.QMainWindow):
                 checked_buttons[radio_button] = value
 
         return checked_buttons
+
+    def _set_default_dump_file_path(self):
+        if "SU_DUMP_FILE_PATH" in os.environ:
+            self.lineEdit_dump_file.setText(os.environ['SU_DUMP_FILE_PATH'])
+        else:
+            self.lineEdit_dump_file.setText(self._get_default_dump_file_path())