Fixed crash

tools/editortool/map/glwidget.py

@@ -2,9 +2,6 @@ from PyQt5.QtCore import QTimer
 from PyQt5.QtWidgets import QOpenGLWidget
 from OpenGL.GL import *
 from OpenGL.GLU import *
-from editortool.map.selectbox import SelectBox
-from editortool.map.camera import Camera
-from editortool.map.grid import Grid
 
 class GLWidget(QOpenGLWidget):
   def __init__(self, parent):
@@ -13,9 +10,6 @@ class GLWidget(QOpenGLWidget):
     self.timer = QTimer(self)
     self.timer.timeout.connect(self.update)
     self.timer.start(16)  # ~60 FPS
-    self.camera = Camera(self)
-    self.grid = Grid()
-    self.selectBox = SelectBox(self)
 
   def initializeGL(self):
     glClearColor(0.392, 0.584, 0.929, 1.0)
@@ -36,7 +30,6 @@ class GLWidget(QOpenGLWidget):
       w = 1
 
     glViewport(0, 0, w, h)
-    self.camera.setup(w, h)
-
-    self.grid.draw()
-    self.selectBox.draw()
+    self.parent.camera.setup(w, h)
+    self.parent.grid.draw()
+    self.parent.selectBox.draw()