minor optimizations, less self referencing

sdtd_world/region_label.py

@@ -39,6 +39,9 @@ class RegionLabel(QLabel):
         self.setScaledContents(True)
         self.setMouseTracking(True)
 
+    def trigger_cursor_change(self):
+        self.parent_collection.trigger_cursor_change(self)
+
     def clear_image(self):
         self.image = None
 
@@ -60,25 +63,18 @@ class RegionLabel(QLabel):
 
     def update_graphics_effect(self):
         effect = QGraphicsColorizeEffect()
-        effect_required = False
-        style_required = False
         if self.is_marked:
-            style_required = True
             style = "*{ border: 1px dotted #aaaaaa; }"
+            self.setStyleSheet(style)
+        else:
+            self.remove_style_effects()
+
         if self.is_selected:
-            effect_required = True
             effect.setColor(QColor(255, 255, 255, 16))
-
-        if effect_required:
             self.setGraphicsEffect(effect)
         else:
             self.remove_graphics_effects()
 
-        if style_required:
-            self.setStyleSheet(style)
-        else:
-            self.remove_style_effects()
-
     """ altering class functions """
     def mousePressEvent(self, event):
         modifiers = QApplication.keyboardModifiers()
@@ -92,14 +88,14 @@ class RegionLabel(QLabel):
         self.is_selected = True
         self.update_graphics_effect()
         self.parent_collection.set_currently_hovered_label(self)
-        self.parent_collection.trigger_cursor_change(self)
+        self.trigger_cursor_change()
 
         super().enterEvent(event)
 
     def leaveEvent(self, event) -> None:
         self.is_selected = False
         self.update_graphics_effect()
-        self.parent_collection.trigger_cursor_change(self)
+        self.trigger_cursor_change()
 
         super().leaveEvent(event)