Add loading and saving behavior to the screen

clusterview/mode.py

@@ -12,3 +12,4 @@ class Mode(Enum):
     EDIT = 2
     MOVE = 3
     DELETE = 4
+    LOADED = 5

clusterview/mode_handlers.py

@@ -46,7 +46,7 @@ __left_click_flag = __ClickFlag.NONE
 __mouse_start = None
 
 
-def __refresh_point_list(ctx):
+def refresh_point_list(ctx):
     """
     Refreshes the point list display.
 
@@ -93,7 +93,7 @@ def __handle_add_point(ctx, event):
             # on the outside of the window. We will just ignore it.
             return
 
-        __refresh_point_list(ctx)
+        refresh_point_list(ctx)
 
         set_drawing_event(event)
 
@@ -242,7 +242,7 @@ def __handle_delete_point(ctx, event):
 
         PointManager.point_set.remove_point(event.x(), event.y())
 
-        __refresh_point_list(ctx)
+        refresh_point_list(ctx)
 
         ctx.opengl_widget.update()
         ctx.point_list_widget.update()

clusterview/opengl_widget.py

@@ -182,12 +182,10 @@ def paint_gl():
         PointManager.point_set.empty()):
         return
 
-    if __current_mode is Mode.ADD or __current_mode is Mode.DELETE:
-        # Note that drawing the points doesn't require a bounding box or
-        # any special context, so delete just removes the element from
-        # the point set, which will be redrawn here. This action
-        # is the same as adding a point since we just draw what is in
-        # the point set.
+    if (__current_mode is Mode.ADD or
+        __current_mode is Mode.DELETE or
+        __current_mode is Mode.LOADED):
+
         draw_points(PointManager.point_set, Color.GREY)
 
     elif __current_mode is Mode.EDIT:

main_window.py

@@ -2,20 +2,23 @@ from enum import Enum
 from functools import partial
 import os
 
+from PyQt5 import uic
 from PyQt5.QtCore import Qt
 from PyQt5.QtGui import QCursor
-from PyQt5 import QtWidgets, uic
+from PyQt5.QtWidgets import QFileDialog, QMainWindow
 
 from clusterview.exceptions import handle_exceptions, InvalidModeError
 from clusterview.mode import Mode
-from clusterview.mode_handlers import MODE_HANDLER_MAP, ogl_keypress_handler
+from clusterview.mode_handlers import (MODE_HANDLER_MAP, ogl_keypress_handler,
+                                       refresh_point_list)
 from clusterview.opengl_widget import (clear_selection, initialize_gl,
                                        paint_gl, resize_gl,
                                        set_drawing_mode, set_drawing_context)
+from clusterview.point_manager import PointManager
 from clusterview.point_list_widget import item_click_handler
 from clusterview_ui import Ui_MainWindow
 
-class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
+class MainWindow(QMainWindow, Ui_MainWindow):
     """
     A wrapper class for handling creating a window based
     on the `clusterview_ui.py` code generated from
@@ -68,6 +71,12 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
         self.action_move_points.triggered.connect(self.__move_points)
         self.action_solve.triggered.connect(self.__solve_launcher)
 
+        self.action_save_point_configuration.triggered.connect(
+            self.__save_points_file)
+
+        self.action_load_point_configuration.triggered.connect(
+            self.__open_points_file)
+
         # Override handler for mouse press so we can draw points based on
         # the OpenGL coordinate system inside of the OpenGL Widget.
         self.opengl_widget.mousePressEvent = self.__ogl_click_dispatcher
@@ -128,7 +137,30 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
     @mode.setter
     def mode(self, mode):
         self.__mode = mode
-    
+
+    def __open_points_file(self):
+        ofile, _ = QFileDialog.getOpenFileName(self,
+                                               "Open Point Configuration",
+                                               "",
+                                               "JSON files (*.json)")
+        if ofile:
+            set_drawing_mode(Mode.LOADED)
+            self.__mode = Mode.LOADED
+
+            PointManager.load(ofile)
+
+            self.opengl_widget.update()
+
+            refresh_point_list(self)
+
+    def __save_points_file(self):
+        file_name, _ = QFileDialog.getSaveFileName(self,
+                                                  "Save Point Configuration",
+                                                  "",
+                                                  "JSON Files (*.json)")
+        if file_name:
+            PointManager.save(file_name)
+
     @handle_exceptions
     def __solve_launcher(self):
         """
@@ -147,7 +179,7 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
         Mode dispatcher for click actions on the OpenGL widget.
         """
 
-        if self.__mode is not Mode.OFF:
+        if self.__mode not in [Mode.OFF, Mode.LOADED]:
             # Map from Mode -> function
             # where the function is a handler for the
             # OpenGL event. The context passed to these functions allows