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from functools import partial
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from PyQt5.QtCore import Qt
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from PyQt5.QtGui import QCursor
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from PyQt5.QtWidgets import QFileDialog, QInputDialog, QMainWindow
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from clusterview.exceptions import handle_exceptions
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from clusterview.colors import Color
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from clusterview.mode import Mode
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from clusterview.mode_handlers import (group, MODE_HANDLER_MAP,
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ogl_keypress_handler,
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refresh_point_list,
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reset_centroid_count_and_colors,
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generate_random_points)
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from clusterview.opengl_widget import (clear_selection, initialize_gl,
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mouse_leave, paint_gl, resize_gl,
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set_drawing_context)
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from clusterview.points import PointSet
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from clusterview.point_manager import PointManager
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from clusterview.point_list_widget import item_click_handler
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from clusterview_ui import Ui_MainWindow
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class MainWindow(QMainWindow, Ui_MainWindow):
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"""
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A wrapper class for handling creating a window based
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on the `clusterview_ui.py` code generated from
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`clusterview.ui`.
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"""
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# This is a static mode variable since there will only ever
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# be one MainWindow.
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__mode = Mode.OFF
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def __init__(self, parent=None):
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super(MainWindow, self).__init__(parent)
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self.setupUi(self)
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# Size of point for drawing
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self.__point_size = 8
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# TODO: THESE ARE HARD CODED TO THE CURRENT QT WIDGET SIZES
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# FIX THIS PROPERLY WITH A RESIZE EVENT DETECT.
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# PointManager is a class that is filled with static methods
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# designed for managing state.
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self.__viewport_width = 833
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self.__viewport_height = 656
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PointManager.point_set = PointSet(self.__point_size,
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self.__viewport_width,
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self.__viewport_height)
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# Spin box should only allow the number of centroids to be no
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# greater than the number of supported colors minus 2 to exclude
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# the color for selection (Color.BLUE) and the default color for points
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# (Color.GREY).
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self.number_of_centroids.setMinimum(0)
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self.number_of_centroids.setMaximum(Color.count() - 2)
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# We only need to set the context in our OpenGL state machine
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# wrapper once here since the window is fixed size.
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# If we allow resizing of the window, the context must be updated
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# each resize so that coordinates are converted from screen (x, y)
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# to OpenGL coordinates properly.
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set_drawing_context(self)
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# Enables mouse tracking on the viewport so mouseMoveEvents are
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# tracked and fired properly.
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self.opengl_widget.setMouseTracking(True)
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# Enable keyboard input capture on the OpenGL Widget
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self.opengl_widget.setFocusPolicy(Qt.StrongFocus)
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# Here we partially apply the key press handler with self to
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# create a new function that only expects the event `keyPressEvent`
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# expects. In this way, we've snuck the state of the opengl_widget
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# into the function so that we can modify it as we please.
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self.opengl_widget.keyPressEvent = partial(ogl_keypress_handler, self)
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# Same story here but this time with the itemClicked event
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# so that when an element is clicked on in the point list it will
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# highlight.
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self.point_list_widget.itemClicked.connect(partial(item_click_handler,
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self))
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self.choose_centroids_button.clicked.connect(self.__choose_centroids)
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self.group_button.clicked.connect(self.__group)
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self.reset_button.clicked.connect(self.__reset_grouping)
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# -----------------------------------------------
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# OpenGL Graphics Handlers are set
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# here and defined in clusterview.opengl_widget.
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# -----------------------------------------------
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self.opengl_widget.initializeGL = initialize_gl
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self.opengl_widget.paintGL = paint_gl
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self.opengl_widget.resizeGL = resize_gl
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self.opengl_widget.leaveEvent = partial(mouse_leave, self)
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# -------------------------------------
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# UI Handlers
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# -------------------------------------
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self.action_add_points.triggered.connect(self.__add_points)
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self.action_edit_points.triggered.connect(self.__edit_points)
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self.action_delete_points.triggered.connect(self.__delete_points)
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self.action_move_points.triggered.connect(self.__move_points)
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(self.action_generate_random_points
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.triggered.connect(self.__generate_random_points))
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self.action_save_point_configuration.triggered.connect(
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self.__save_points_file)
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self.action_load_point_configuration.triggered.connect(
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self.__open_points_file)
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self.action_exit.triggered.connect(self.__close_event)
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# Override handler for mouse press so we can draw points based on
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# the OpenGL coordinate system inside of the OpenGL Widget.
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self.opengl_widget.mousePressEvent = self.__ogl_click_dispatcher
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self.opengl_widget.mouseMoveEvent = self.__ogl_click_dispatcher
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self.opengl_widget.mouseReleaseEvent = self.__ogl_click_dispatcher
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# -----------------------------------------------------------------
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# Mode changers - these will be used to signal the action in the
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# OpenGL Widget.
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# -----------------------------------------------------------------
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def __off_mode(self):
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self.__mode = Mode.OFF
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self.opengl_widget.setCursor(QCursor(Qt.CursorShape.ArrowCursor))
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self.status_bar.showMessage("")
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clear_selection()
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self.opengl_widget.update()
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def __add_points(self):
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self.__mode = Mode.ADD
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self.opengl_widget.setCursor(QCursor(Qt.CursorShape.CrossCursor))
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self.status_bar.showMessage("ADD MODE")
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clear_selection()
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self.opengl_widget.update()
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def __edit_points(self):
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self.__mode = Mode.EDIT
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self.opengl_widget.setCursor(QCursor(Qt.CursorShape.CrossCursor))
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self.status_bar.showMessage("EDIT MODE")
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clear_selection()
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self.opengl_widget.update()
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def __delete_points(self):
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self.__mode = Mode.DELETE
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self.opengl_widget.setCursor(QCursor(
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Qt.CursorShape.PointingHandCursor))
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self.status_bar.showMessage("DELETE MODE")
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clear_selection()
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self.opengl_widget.update()
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def __move_points(self):
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self.__mode = Mode.MOVE
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self.opengl_widget.setCursor(QCursor(Qt.CursorShape.SizeAllCursor))
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self.status_bar.showMessage("MOVE MODE - PRESS ESC OR SWITCH MODES" +
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"TO CANCEL SELECTION")
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clear_selection()
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self.opengl_widget.update()
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def __choose_centroids(self):
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self.__mode = Mode.CHOOSE_CENTROIDS
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self.opengl_widget.setCursor(QCursor(Qt.CursorShape.CrossCursor))
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self.status_bar.showMessage("CHOOSE CENTROIDS")
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clear_selection()
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self.opengl_widget.update()
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def __group(self):
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self.__mode = Mode.GROUP
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self.opengl_widget.setCursor(QCursor(Qt.CursorShape.ArrowCursor))
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self.status_bar.showMessage("GROUPING")
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clear_selection()
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group(self)
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self.__off_mode()
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self.opengl_widget.update()
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def __reset_grouping(self):
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self.__off_mode()
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self.number_of_centroids.setEnabled(True)
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self.number_of_centroids.setValue(0)
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self.choose_centroids_button.setEnabled(True)
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self.solve_button.setEnabled(False)
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self.group_button.setEnabled(False)
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PointManager.centroids = []
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reset_centroid_count_and_colors()
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def __generate_random_points(self):
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value, ok = QInputDialog.getInt(self, "Number of Points",
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"Number of Points:", 30, 30, 3000, 1)
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if ok:
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self.__mode = Mode.ADD
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generate_random_points(value,
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(self.__viewport_width - self.__point_size),
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(self.__viewport_height - self.__point_size)
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)
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self.__mode = Mode.OFF
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self.opengl_widget.update()
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refresh_point_list(self)
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@property
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def mode(self):
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"""
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Function designed to be used from a context
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to get the current mode.
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"""
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return self.__mode
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@mode.setter
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def mode(self, mode):
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self.__mode = mode
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def __close_event(self, event):
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import sys
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sys.exit(0)
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def __open_points_file(self):
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ofile, _ = QFileDialog.getOpenFileName(self,
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"Open Point Configuration",
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"",
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"JSON files (*.json)")
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if ofile:
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self.__mode = Mode.LOADED
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PointManager.load(ofile)
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self.opengl_widget.update()
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refresh_point_list(self)
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def __save_points_file(self):
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file_name, _ = (QFileDialog.
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getSaveFileName(self,
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"Save Point Configuration",
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"",
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"JSON Files (*.json)"))
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if file_name:
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PointManager.save(file_name)
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@handle_exceptions
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def __ogl_click_dispatcher(self, event):
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"""
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Mode dispatcher for click actions on the OpenGL widget.
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"""
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# Map from Mode -> function
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# where the function is a handler for the
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# OpenGL event. The context passed to these functions allows
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# them to modify on screen widgets such as the QOpenGLWidget and
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# QListWidget.
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MODE_HANDLER_MAP[self.__mode](self, event)
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