Get ESC working properly

clusterview/mode_handlers.py

@@ -116,23 +116,30 @@ def ogl_keypress_handler(ctx, event):
     """
     A keypress handler attached to the OpenGL widget.
 
-    It primarily exists to allow the user to cancel
-    selection with ESC.
+    It primarily exists to allow the user to cancel selection.
+
+    Also allows users to escape from modes.
 
     @param ctx A handle to the window context.
     @param event The event associated with this handler.
     """
+    global __current_mode
     global __left_click_flag
     global __mouse_start
 
-    if (__left_click_flag is not __ClickFlag.NONE
-        and event.key() == Qt.Key_Escape):
+    if event.key() == Qt.Key_Escape:
+        if ctx.mode is Mode.MOVE:
+            if __left_click_flag is not __ClickFlag.NONE:
 
-        __mouse_start = None
+                __mouse_start = None
+
+                __left_click_flag = __ClickFlag.NONE
+                __point_set.clear_selection()
+                reset_move_bbs()
+
+        elif ctx.mode is not Mode.OFF:
+            ctx.mode = Mode.OFF
 
-        __left_click_flag = __ClickFlag.NONE
-        __point_set.clear_selection()
-        reset_move_bbs()
         ctx.opengl_widget.update()
 
 

main_window.py

@@ -38,8 +38,6 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
         # tracked and fired properly.
         self.opengl_widget.setMouseTracking(True)
 
-        # Enables us to handle key press events (used for checking
-        # for and handling terminating selections with ESC).
         # Here we partially apply the key press handler with self to
         # create a new function that only expects the event `keyPressEvent`
         # expects. In this way, we've snuck the state of the opengl_widget
@@ -73,6 +71,12 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
     # Mode changers - these will be used to signal the action in the
     #                 OpenGL Widget.
     #-----------------------------------------------------------------
+    def __off_mode(self):
+        self.opengl_widget.setCursor(QCursor(Qt.CursorShape.ArrowCursor))
+        self.status_bar.showMessage("")
+        clear_selection()
+        self.opengl_widget.update()
+
     def __add_points(self):
         self.__mode = Mode.ADD
         set_drawing_mode(self.__mode)
@@ -105,6 +109,18 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
         clear_selection()
         self.opengl_widget.update()
 
+    @property
+    def mode(self):
+        """
+        Function designed to be used from a context
+        to get the current mode.
+        """
+        return self.__mode
+
+    @mode.setter
+    def mode(self, mode):
+        self.__mode = mode
+    
     @handle_exceptions
     def __solve_launcher(self):
         """
@@ -130,3 +146,6 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
             # them to modify on screen widgets such as the QOpenGLWidget and
             # QListWidget.
             MODE_HANDLER_MAP[self.__mode](self, event)
+        else:
+            # Go back to the base state
+            self.__off_mode()