diff --git a/GUI_draft_live.py b/GUI_draft_live.py
deleted file mode 100644
index 90089d8827ccae9665dc4797e7fba4e5bba094d0..0000000000000000000000000000000000000000
--- a/GUI_draft_live.py
+++ /dev/null
@@ -1,1181 +0,0 @@
-import sys
-import math
-import csv  # <-- Added
-import numpy as np
-
-# For smoothing the path
-from scipy.signal import savgol_filter
-
-from PyQt5.QtWidgets import (
-    QApplication, QMainWindow, QGraphicsView, QGraphicsScene,
-    QGraphicsEllipseItem, QGraphicsPixmapItem, QPushButton,
-    QHBoxLayout, QVBoxLayout, QWidget, QFileDialog, QGraphicsTextItem,
-    QSlider, QLabel, QCheckBox, QGridLayout, QSizePolicy
-)
-from PyQt5.QtGui import QPixmap, QPen, QBrush, QColor, QFont, QImage
-from PyQt5.QtCore import Qt, QRectF, QSize
-
-# live_wire.py must contain something like:
-#   from skimage import exposure
-#   from skimage.filters import gaussian
-#   def preprocess_image(image, sigma=3, clip_limit=0.01): ...
-#   def compute_cost_image(path, user_radius, sigma=3, clip_limit=0.01): ...
-#   def find_path(cost_image, points): ...
-#   ...
-from live_wire import compute_cost_image, find_path, preprocess_image
-
-
-# ------------------------------------------------------------------------
-# A pan & zoom QGraphicsView
-# ------------------------------------------------------------------------
-class PanZoomGraphicsView(QGraphicsView):
-    def __init__(self, parent=None):
-        super().__init__(parent)
-        self.setDragMode(QGraphicsView.NoDrag)  # We'll handle panning manually
-        self.setTransformationAnchor(QGraphicsView.AnchorUnderMouse)
-        self._panning = False
-        self._pan_start = None
-
-        # Let it expand in layouts
-        self.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
-
-    def wheelEvent(self, event):
-        """ Zoom in/out with mouse wheel. """
-        zoom_in_factor = 1.25
-        zoom_out_factor = 1 / zoom_in_factor
-        if event.angleDelta().y() > 0:
-            self.scale(zoom_in_factor, zoom_in_factor)
-        else:
-            self.scale(zoom_out_factor, zoom_out_factor)
-        event.accept()
-
-    def mousePressEvent(self, event):
-        """ If left button: Start panning (unless overridden). """
-        if event.button() == Qt.LeftButton:
-            self._panning = True
-            self._pan_start = event.pos()
-            self.setCursor(Qt.ClosedHandCursor)
-        super().mousePressEvent(event)
-
-    def mouseMoveEvent(self, event):
-        """ If panning, translate the scene. """
-        if self._panning and self._pan_start is not None:
-            delta = event.pos() - self._pan_start
-            self._pan_start = event.pos()
-            self.translate(delta.x(), delta.y())
-        super().mouseMoveEvent(event)
-
-    def mouseReleaseEvent(self, event):
-        """ End panning. """
-        if event.button() == Qt.LeftButton:
-            self._panning = False
-            self.setCursor(Qt.ArrowCursor)
-        super().mouseReleaseEvent(event)
-
-
-# ------------------------------------------------------------------------
-# A specialized PanZoomGraphicsView for the circle editor
-# ------------------------------------------------------------------------
-class CircleEditorGraphicsView(PanZoomGraphicsView):
-    def __init__(self, circle_editor_widget, parent=None):
-        super().__init__(parent)
-        self._circle_editor_widget = circle_editor_widget
-
-    def mousePressEvent(self, event):
-        if event.button() == Qt.LeftButton:
-            # Check if user clicked on the circle item
-            clicked_item = self.itemAt(event.pos())
-            if clicked_item is not None:
-                # climb up parent chain
-                it = clicked_item
-                while it is not None and not hasattr(it, "boundingRect"):
-                    it = it.parentItem()
-
-                if isinstance(it, DraggableCircleItem):
-                    # Let normal item-dragging occur, no pan
-                    return QGraphicsView.mousePressEvent(self, event)
-        super().mousePressEvent(event)
-
-    def wheelEvent(self, event):
-        """
-        If the mouse is hovering over the circle, we adjust the circle's radius
-        instead of zooming the image.
-        """
-        pos_in_widget = event.pos()
-        item_under = self.itemAt(pos_in_widget)
-        if item_under is not None:
-            it = item_under
-            while it is not None and not hasattr(it, "boundingRect"):
-                it = it.parentItem()
-
-            if isinstance(it, DraggableCircleItem):
-                delta = event.angleDelta().y()
-                step = 1 if delta > 0 else -1
-                old_r = it.radius()
-                new_r = max(1, old_r + step)
-                it.set_radius(new_r)
-                self._circle_editor_widget.update_slider_value(new_r)
-                event.accept()
-                return
-
-        super().wheelEvent(event)
-
-
-# ------------------------------------------------------------------------
-# Draggable circle item (centered at (x, y) with radius)
-# ------------------------------------------------------------------------
-class DraggableCircleItem(QGraphicsEllipseItem):
-    def __init__(self, x, y, radius=20, color=Qt.red, parent=None):
-        super().__init__(0, 0, 2*radius, 2*radius, parent)
-        self._r = radius
-
-        pen = QPen(color)
-        brush = QBrush(color)
-        self.setPen(pen)
-        self.setBrush(brush)
-
-        # Enable item-based dragging
-        self.setFlags(QGraphicsEllipseItem.ItemIsMovable |
-                      QGraphicsEllipseItem.ItemIsSelectable |
-                      QGraphicsEllipseItem.ItemSendsScenePositionChanges)
-
-        # Position so that (x, y) is the center
-        self.setPos(x - radius, y - radius)
-
-    def set_radius(self, r):
-        old_center = self.sceneBoundingRect().center()
-        self._r = r
-        self.setRect(0, 0, 2*r, 2*r)
-        new_center = self.sceneBoundingRect().center()
-        diff_x = old_center.x() - new_center.x()
-        diff_y = old_center.y() - new_center.y()
-        self.moveBy(diff_x, diff_y)
-
-    def radius(self):
-        return self._r
-
-
-# ------------------------------------------------------------------------
-# Circle editor widget with slider + done
-# ------------------------------------------------------------------------
-class CircleEditorWidget(QWidget):
-    def __init__(self, pixmap, init_radius=20, done_callback=None, parent=None):
-        super().__init__(parent)
-        self._pixmap = pixmap
-        self._done_callback = done_callback
-        self._init_radius = init_radius
-
-        layout = QVBoxLayout(self)
-        self.setLayout(layout)
-
-        #
-        # 1) ADD A CENTERED LABEL ABOVE THE IMAGE, WITH BIGGER FONT
-        #
-        label_instructions = QLabel("Scale the dot to be of the size of your ridge")
-        label_instructions.setAlignment(Qt.AlignCenter)
-        big_font = QFont("Arial", 20)
-        big_font.setBold(True)
-        label_instructions.setFont(big_font)
-        layout.addWidget(label_instructions)
-
-        #
-        # 2) THE SPECIALIZED GRAPHICS VIEW THAT SHOWS THE IMAGE
-        #
-        self._graphics_view = CircleEditorGraphicsView(circle_editor_widget=self)
-        self._scene = QGraphicsScene(self)
-        self._graphics_view.setScene(self._scene)
-        layout.addWidget(self._graphics_view)
-
-        # Show the image
-        self._image_item = QGraphicsPixmapItem(self._pixmap)
-        self._scene.addItem(self._image_item)
-
-        # Put circle in center
-        cx = self._pixmap.width() / 2
-        cy = self._pixmap.height() / 2
-        self._circle_item = DraggableCircleItem(cx, cy, radius=self._init_radius, color=Qt.red)
-        self._scene.addItem(self._circle_item)
-
-        # Fit in view
-        self._graphics_view.setSceneRect(QRectF(self._pixmap.rect()))
-        self._graphics_view.fitInView(self._image_item, Qt.KeepAspectRatio)
-
-        #
-        # 3) CONTROLS BELOW
-        #
-        bottom_layout = QHBoxLayout()
-        layout.addLayout(bottom_layout)
-
-        # label + slider
-        self._lbl_size = QLabel(f"size ({self._init_radius})")
-        bottom_layout.addWidget(self._lbl_size)
-
-        self._slider = QSlider(Qt.Horizontal)
-        self._slider.setRange(1, 200)
-        self._slider.setValue(self._init_radius)
-        bottom_layout.addWidget(self._slider)
-
-        # done button
-        self._btn_done = QPushButton("Done")
-        bottom_layout.addWidget(self._btn_done)
-
-        # Connect signals
-        self._slider.valueChanged.connect(self._on_slider_changed)
-        self._btn_done.clicked.connect(self._on_done_clicked)
-
-    def _on_slider_changed(self, value):
-        self._circle_item.set_radius(value)
-        self._lbl_size.setText(f"size ({value})")
-
-    def _on_done_clicked(self):
-        final_radius = self._circle_item.radius()
-        if self._done_callback is not None:
-            self._done_callback(final_radius)
-
-    def update_slider_value(self, new_radius):
-        self._slider.blockSignals(True)
-        self._slider.setValue(new_radius)
-        self._slider.blockSignals(False)
-        self._lbl_size.setText(f"size ({new_radius})")
-
-    def sizeHint(self):
-        return QSize(800, 600)
-
-
-# ------------------------------------------------------------------------
-# Labeled point item
-# ------------------------------------------------------------------------
-class LabeledPointItem(QGraphicsEllipseItem):
-    def __init__(self, x, y, label="", radius=4, color=Qt.red, removable=True, z_value=0, parent=None):
-        super().__init__(0, 0, 2*radius, 2*radius, parent)
-        self._x = x
-        self._y = y
-        self._r = radius
-        self._removable = removable
-
-        pen = QPen(color)
-        brush = QBrush(color)
-        self.setPen(pen)
-        self.setBrush(brush)
-        self.setZValue(z_value)
-
-        self._text_item = None
-        if label:
-            self._text_item = QGraphicsTextItem(self)
-            self._text_item.setPlainText(label)
-            self._text_item.setDefaultTextColor(QColor("black"))
-            font = QFont("Arial", 14)
-            font.setBold(True)
-            self._text_item.setFont(font)
-            self._scale_text_to_fit()
-
-        self.set_pos(x, y)
-
-    def _scale_text_to_fit(self):
-        if not self._text_item:
-            return
-        self._text_item.setScale(1.0)
-        circle_diam = 2 * self._r
-        raw_rect = self._text_item.boundingRect()
-        text_w = raw_rect.width()
-        text_h = raw_rect.height()
-        if text_w > circle_diam or text_h > circle_diam:
-            scale_factor = min(circle_diam / text_w, circle_diam / text_h)
-            self._text_item.setScale(scale_factor)
-        self._center_label()
-
-    def _center_label(self):
-        if not self._text_item:
-            return
-        ellipse_w = 2 * self._r
-        ellipse_h = 2 * self._r
-        raw_rect = self._text_item.boundingRect()
-        scale_factor = self._text_item.scale()
-        scaled_w = raw_rect.width() * scale_factor
-        scaled_h = raw_rect.height() * scale_factor
-        tx = (ellipse_w - scaled_w) * 0.5
-        ty = (ellipse_h - scaled_h) * 0.5
-        self._text_item.setPos(tx, ty)
-
-    def set_pos(self, x, y):
-        """Positions the circle so its center is at (x, y)."""
-        self._x = x
-        self._y = y
-        self.setPos(x - self._r, y - self._r)
-
-    def get_pos(self):
-        return (self._x, self._y)
-
-    def distance_to(self, x_other, y_other):
-        return math.sqrt((self._x - x_other)**2 + (self._y - y_other)**2)
-
-    def is_removable(self):
-        return self._removable
-
-
-# ------------------------------------------------------------------------
-# The original ImageGraphicsView with pan & zoom
-# ------------------------------------------------------------------------
-class ImageGraphicsView(PanZoomGraphicsView):
-    def __init__(self, parent=None):
-        super().__init__(parent)
-        self.scene = QGraphicsScene(self)
-        self.setScene(self.scene)
-
-        # Image display
-        self.image_item = QGraphicsPixmapItem()
-        self.scene.addItem(self.image_item)
-
-        self.anchor_points = []    # List[(x, y)]
-        self.point_items = []      # LabeledPointItem
-        self.full_path_points = [] # QGraphicsEllipseItems for path
-        self._full_path_xy = []    # entire path coords (smoothed)
-
-        self.dot_radius = 4
-        self.path_radius = 1
-        self.radius_cost_image = 2
-        self._img_w = 0
-        self._img_h = 0
-
-        self._mouse_pressed = False
-        self._press_view_pos = None
-        self._drag_threshold = 5
-        self._was_dragging = False
-        self._dragging_idx = None
-        self._drag_offset = (0, 0)
-        self._drag_counter = 0
-
-        # Cost images
-        self.cost_image_original = None
-        self.cost_image = None
-
-        # Rainbow toggle => start with OFF
-        self._rainbow_enabled = False
-
-        # Smoothing parameters
-        self._savgol_window_length = 7
-
-    def set_rainbow_enabled(self, enabled: bool):
-        self._rainbow_enabled = enabled
-        self._rebuild_full_path()
-
-    def toggle_rainbow(self):
-        self._rainbow_enabled = not self._rainbow_enabled
-        self._rebuild_full_path()
-
-    def set_savgol_window_length(self, wlen: int):
-        if wlen < 3:
-            wlen = 3
-        if wlen % 2 == 0:
-            wlen += 1
-        self._savgol_window_length = wlen
-
-        self._rebuild_full_path()
-
-    # --------------------------------------------------------------------
-    # LOADING
-    # --------------------------------------------------------------------
-    def load_image(self, path):
-        pixmap = QPixmap(path)
-        if not pixmap.isNull():
-            self.image_item.setPixmap(pixmap)
-            self.setSceneRect(QRectF(pixmap.rect()))
-
-            self._img_w = pixmap.width()
-            self._img_h = pixmap.height()
-
-            self._clear_all_points()
-            self.resetTransform()
-            self.fitInView(self.image_item, Qt.KeepAspectRatio)
-
-            # By default, add S/E
-            s_x, s_y = 0.15 * self._img_w, 0.5 * self._img_h
-            e_x, e_y = 0.85 * self._img_w, 0.5 * self._img_h
-            self._insert_anchor_point(-1, s_x, s_y, label="S", removable=False, z_val=100, radius=6)
-            self._insert_anchor_point(-1, e_x, e_y, label="E", removable=False, z_val=100, radius=6)
-
-    # --------------------------------------------------------------------
-    # ANCHOR POINTS
-    # --------------------------------------------------------------------
-    def _insert_anchor_point(self, idx, x, y, label="", removable=True, z_val=0, radius=4):
-        x_clamped = self._clamp(x, radius, self._img_w - radius)
-        y_clamped = self._clamp(y, radius, self._img_h - radius)
-
-        if idx < 0:
-            # Insert before E if there's at least 2 anchors
-            if len(self.anchor_points) >= 2:
-                idx = len(self.anchor_points) - 1
-            else:
-                idx = len(self.anchor_points)
-
-        self.anchor_points.insert(idx, (x_clamped, y_clamped))
-        color = Qt.green if label in ("S", "E") else Qt.red
-        item = LabeledPointItem(x_clamped, y_clamped,
-                                label=label, radius=radius, color=color,
-                                removable=removable, z_value=z_val)
-        self.point_items.insert(idx, item)
-        self.scene.addItem(item)
-
-    def _add_guide_point(self, x, y):
-        # Ensure we clamp properly
-        x_clamped = self._clamp(x, self.dot_radius, self._img_w - self.dot_radius)
-        y_clamped = self._clamp(y, self.dot_radius, self._img_h - self.dot_radius)
-
-        self._revert_cost_to_original()
-
-        if not self._full_path_xy:
-            self._insert_anchor_point(-1, x_clamped, y_clamped,
-                                      label="", removable=True, z_val=1, radius=self.dot_radius)
-        else:
-            self._insert_anchor_between_subpath(x_clamped, y_clamped)
-
-        self._apply_all_guide_points_to_cost()
-        self._rebuild_full_path()
-
-    def _insert_anchor_between_subpath(self, x_new, y_new):
-        # If somehow we have no path yet
-        if not self._full_path_xy:
-            self._insert_anchor_point(-1, x_new, y_new)
-            return
-
-        # Find nearest point in the current full path
-        best_idx = None
-        best_d2 = float('inf')
-        for i, (px, py) in enumerate(self._full_path_xy):
-            dx = px - x_new
-            dy = py - y_new
-            d2 = dx*dx + dy*dy
-            if d2 < best_d2:
-                best_d2 = d2
-                best_idx = i
-
-        if best_idx is None:
-            self._insert_anchor_point(-1, x_new, y_new)
-            return
-
-        def approx_equal(xa, ya, xb, yb, tol=1e-3):
-            return (abs(xa - xb) < tol) and (abs(ya - yb) < tol)
-
-        def is_anchor(coord):
-            cx, cy = coord
-            for (ax, ay) in self.anchor_points:
-                if approx_equal(ax, ay, cx, cy):
-                    return True
-            return False
-
-        # Walk left
-        left_anchor_pt = None
-        iL = best_idx
-        while iL >= 0:
-            px, py = self._full_path_xy[iL]
-            if is_anchor((px, py)):
-                left_anchor_pt = (px, py)
-                break
-            iL -= 1
-
-        # Walk right
-        right_anchor_pt = None
-        iR = best_idx
-        while iR < len(self._full_path_xy):
-            px, py = self._full_path_xy[iR]
-            if is_anchor((px, py)):
-                right_anchor_pt = (px, py)
-                break
-            iR += 1
-
-        # If we can't find distinct anchors on left & right,
-        # just insert before E.
-        if not left_anchor_pt or not right_anchor_pt:
-            self._insert_anchor_point(-1, x_new, y_new)
-            return
-        if left_anchor_pt == right_anchor_pt:
-            self._insert_anchor_point(-1, x_new, y_new)
-            return
-
-        # Convert anchor coords -> anchor_points indices
-        left_idx = None
-        right_idx = None
-        for i, (ax, ay) in enumerate(self.anchor_points):
-            if approx_equal(ax, ay, left_anchor_pt[0], left_anchor_pt[1]):
-                left_idx = i
-            if approx_equal(ax, ay, right_anchor_pt[0], right_anchor_pt[1]):
-                right_idx = i
-
-        if left_idx is None or right_idx is None:
-            self._insert_anchor_point(-1, x_new, y_new)
-            return
-
-        # Insert between them
-        if left_idx < right_idx:
-            insert_idx = left_idx + 1
-        else:
-            insert_idx = right_idx + 1
-
-        self._insert_anchor_point(insert_idx, x_new, y_new, label="", removable=True,
-                                  z_val=1, radius=self.dot_radius)
-
-    # --------------------------------------------------------------------
-    # COST IMAGE
-    # --------------------------------------------------------------------
-    def _revert_cost_to_original(self):
-        if self.cost_image_original is not None:
-            self.cost_image = self.cost_image_original.copy()
-
-    def _apply_all_guide_points_to_cost(self):
-        if self.cost_image is None:
-            return
-        for i, (ax, ay) in enumerate(self.anchor_points):
-            if self.point_items[i].is_removable():
-                self._lower_cost_in_circle(ax, ay, self.radius_cost_image)
-
-    def _lower_cost_in_circle(self, x_f, y_f, radius):
-        if self.cost_image is None:
-            return
-        h, w = self.cost_image.shape
-        row_c = int(round(y_f))
-        col_c = int(round(x_f))
-        if not (0 <= row_c < h and 0 <= col_c < w):
-            return
-        global_min = self.cost_image.min()
-        r_s = max(0, row_c - radius)
-        r_e = min(h, row_c + radius + 1)
-        c_s = max(0, col_c - radius)
-        c_e = min(w, col_c + radius + 1)
-        for rr in range(r_s, r_e):
-            for cc in range(c_s, c_e):
-                dist = math.sqrt((rr - row_c)**2 + (cc - col_c)**2)
-                if dist <= radius:
-                    self.cost_image[rr, cc] = global_min
-
-    # --------------------------------------------------------------------
-    # PATH BUILDING
-    # --------------------------------------------------------------------
-    def _rebuild_full_path(self):
-        for item in self.full_path_points:
-            self.scene.removeItem(item)
-        self.full_path_points.clear()
-        self._full_path_xy.clear()
-
-        if len(self.anchor_points) < 2 or self.cost_image is None:
-            return
-
-        big_xy = []
-        for i in range(len(self.anchor_points) - 1):
-            xA, yA = self.anchor_points[i]
-            xB, yB = self.anchor_points[i + 1]
-            sub_xy = self._compute_subpath_xy(xA, yA, xB, yB)
-            if i == 0:
-                big_xy.extend(sub_xy)
-            else:
-                if len(sub_xy) > 1:
-                    big_xy.extend(sub_xy[1:])
-
-        if len(big_xy) >= self._savgol_window_length:
-            arr_xy = np.array(big_xy)
-            smoothed = savgol_filter(
-                arr_xy,
-                window_length=self._savgol_window_length,
-                polyorder=2,
-                axis=0
-            )
-            big_xy = smoothed.tolist()
-
-        self._full_path_xy = big_xy[:]
-
-        n_points = len(big_xy)
-        for i, (px, py) in enumerate(big_xy):
-            fraction = i / (n_points - 1) if n_points > 1 else 0
-            color = Qt.red
-            if self._rainbow_enabled:
-                color = self._rainbow_color(fraction)
-
-            path_item = LabeledPointItem(px, py, label="",
-                                         radius=self.path_radius,
-                                         color=color,
-                                         removable=False,
-                                         z_value=0)
-            self.full_path_points.append(path_item)
-            self.scene.addItem(path_item)
-
-        # Keep anchor labels on top
-        for p_item in self.point_items:
-            if p_item._text_item:
-                p_item.setZValue(100)
-
-    def _compute_subpath_xy(self, xA, yA, xB, yB):
-        if self.cost_image is None:
-            return []
-        h, w = self.cost_image.shape
-        rA, cA = int(round(yA)), int(round(xA))
-        rB, cB = int(round(yB)), int(round(xB))
-        rA = max(0, min(rA, h - 1))
-        cA = max(0, min(cA, w - 1))
-        rB = max(0, min(rB, h - 1))
-        cB = max(0, min(cB, w - 1))
-        try:
-            path_rc = find_path(self.cost_image, [(rA, cA), (rB, cB)])
-        except ValueError as e:
-            print("Error in find_path:", e)
-            return []
-        # Convert from (row, col) to (x, y)
-        return [(c, r) for (r, c) in path_rc]
-
-    def _rainbow_color(self, fraction):
-        hue = int(300 * fraction)
-        saturation = 255
-        value = 255
-        return QColor.fromHsv(hue, saturation, value)
-
-    # --------------------------------------------------------------------
-    # MOUSE EVENTS
-    # --------------------------------------------------------------------
-    def mousePressEvent(self, event):
-        if event.button() == Qt.LeftButton:
-            self._mouse_pressed = True
-            self._was_dragging = False
-            self._press_view_pos = event.pos()
-
-            idx = self._find_item_near(event.pos(), threshold=10)
-            if idx is not None:
-                self._dragging_idx = idx
-                self._drag_counter = 0
-                scene_pos = self.mapToScene(event.pos())
-                px, py = self.point_items[idx].get_pos()
-                self._drag_offset = (scene_pos.x() - px, scene_pos.y() - py)
-                self.setCursor(Qt.ClosedHandCursor)
-                return
-
-        elif event.button() == Qt.RightButton:
-            self._remove_point_by_click(event.pos())
-
-        super().mousePressEvent(event)
-
-    def mouseMoveEvent(self, event):
-        if self._dragging_idx is not None:
-            scene_pos = self.mapToScene(event.pos())
-            x_new = scene_pos.x() - self._drag_offset[0]
-            y_new = scene_pos.y() - self._drag_offset[1]
-
-            r = self.point_items[self._dragging_idx]._r
-            x_clamped = self._clamp(x_new, r, self._img_w - r)
-            y_clamped = self._clamp(y_new, r, self._img_h - r)
-            self.point_items[self._dragging_idx].set_pos(x_clamped, y_clamped)
-
-            self._drag_counter += 1
-            # Update path every 4 moves
-            if self._drag_counter >= 4:
-                self._drag_counter = 0
-                self._revert_cost_to_original()
-                self._apply_all_guide_points_to_cost()
-                self.anchor_points[self._dragging_idx] = (x_clamped, y_clamped)
-                self._rebuild_full_path()
-        else:
-            if self._mouse_pressed and (event.buttons() & Qt.LeftButton):
-                dist = (event.pos() - self._press_view_pos).manhattanLength()
-                if dist > self._drag_threshold:
-                    self._was_dragging = True
-
-        super().mouseMoveEvent(event)
-
-    def mouseReleaseEvent(self, event):
-        super().mouseReleaseEvent(event)
-        if event.button() == Qt.LeftButton and self._mouse_pressed:
-            self._mouse_pressed = False
-            self.setCursor(Qt.ArrowCursor)
-
-            if self._dragging_idx is not None:
-                idx = self._dragging_idx
-                self._dragging_idx = None
-                self._drag_offset = (0, 0)
-                newX, newY = self.point_items[idx].get_pos()
-                self.anchor_points[idx] = (newX, newY)
-                self._revert_cost_to_original()
-                self._apply_all_guide_points_to_cost()
-                self._rebuild_full_path()
-            else:
-                # No drag => add point
-                if not self._was_dragging:
-                    scene_pos = self.mapToScene(event.pos())
-                    x, y = scene_pos.x(), scene_pos.y()
-                    self._add_guide_point(x, y)
-
-            self._was_dragging = False
-
-    def _remove_point_by_click(self, view_pos):
-        idx = self._find_item_near(view_pos, threshold=10)
-        if idx is None:
-            return
-        if not self.point_items[idx].is_removable():
-            return
-
-        self.scene.removeItem(self.point_items[idx])
-        self.point_items.pop(idx)
-        self.anchor_points.pop(idx)
-
-        self._revert_cost_to_original()
-        self._apply_all_guide_points_to_cost()
-        self._rebuild_full_path()
-
-    def _find_item_near(self, view_pos, threshold=10):
-        scene_pos = self.mapToScene(view_pos)
-        x_click, y_click = scene_pos.x(), scene_pos.y()
-
-        closest_idx = None
-        min_dist = float('inf')
-        for i, itm in enumerate(self.point_items):
-            d = itm.distance_to(x_click, y_click)
-            if d < min_dist:
-                min_dist = d
-                closest_idx = i
-        if closest_idx is not None and min_dist <= threshold:
-            return closest_idx
-        return None
-
-    # --------------------------------------------------------------------
-    # UTILS
-    # --------------------------------------------------------------------
-    def _clamp(self, val, mn, mx):
-        return max(mn, min(val, mx))
-
-    def _clear_all_points(self):
-        for it in self.point_items:
-            self.scene.removeItem(it)
-        self.point_items.clear()
-        self.anchor_points.clear()
-
-        for p in self.full_path_points:
-            self.scene.removeItem(p)
-        self.full_path_points.clear()
-        self._full_path_xy.clear()
-
-    def clear_guide_points(self):
-        i = 0
-        while i < len(self.anchor_points):
-            if self.point_items[i].is_removable():
-                self.scene.removeItem(self.point_items[i])
-                del self.point_items[i]
-                del self.anchor_points[i]
-            else:
-                i += 1
-
-        for it in self.full_path_points:
-            self.scene.removeItem(it)
-        self.full_path_points.clear()
-        self._full_path_xy.clear()
-
-        self._revert_cost_to_original()
-        self._apply_all_guide_points_to_cost()
-        self._rebuild_full_path()
-
-    def get_full_path_xy(self):
-        return self._full_path_xy
-
-
-# ------------------------------------------------------------------------
-# Advanced Settings Widget
-# ------------------------------------------------------------------------
-class AdvancedSettingsWidget(QWidget):
-    """
-    Shows toggle rainbow, circle editor, line smoothing slider, contrast slider,
-    plus two image previews (contrasted-blurred and cost).
-    The images should maintain aspect ratio upon resize.
-    """
-    def __init__(self, main_window, parent=None):
-        super().__init__(parent)
-        self._main_window = main_window
-
-        self._last_cb_pix = None   # store QPixmap for contrasted-blurred
-        self._last_cost_pix = None # store QPixmap for cost
-
-        main_layout = QVBoxLayout()
-        self.setLayout(main_layout)
-
-        # A small grid for controls
-        controls_layout = QGridLayout()
-
-        # 1) Rainbow toggle
-        self.btn_toggle_rainbow = QPushButton("Toggle Rainbow")
-        self.btn_toggle_rainbow.clicked.connect(self._on_toggle_rainbow)
-        controls_layout.addWidget(self.btn_toggle_rainbow, 0, 0)
-
-        # 2) Circle editor
-        self.btn_circle_editor = QPushButton("Calibrate Kernel Size")
-        self.btn_circle_editor.clicked.connect(self._main_window.open_circle_editor)
-        controls_layout.addWidget(self.btn_circle_editor, 0, 1)
-
-        # 3) Line smoothing slider + label
-        self._lab_smoothing = QLabel("Line smoothing (3)")
-        controls_layout.addWidget(self._lab_smoothing, 1, 0)
-        self.line_smoothing_slider = QSlider(Qt.Horizontal)
-        self.line_smoothing_slider.setRange(3, 51)
-        self.line_smoothing_slider.setValue(3)
-        self.line_smoothing_slider.valueChanged.connect(self._on_line_smoothing_slider)
-        controls_layout.addWidget(self.line_smoothing_slider, 1, 1)
-
-        # 4) Contrast slider + label
-        self._lab_contrast = QLabel("Contrast (0.01)")
-        controls_layout.addWidget(self._lab_contrast, 2, 0)
-        self.contrast_slider = QSlider(Qt.Horizontal)
-        self.contrast_slider.setRange(1, 20)
-        self.contrast_slider.setValue(1)  # i.e. 0.01
-        self.contrast_slider.setSingleStep(1)
-        self.contrast_slider.valueChanged.connect(self._on_contrast_slider)
-        controls_layout.addWidget(self.contrast_slider, 2, 1)
-
-        main_layout.addLayout(controls_layout)
-
-        # We'll set a minimum width so that the main window expands
-        # rather than overlapping the image
-        self.setMinimumWidth(350)
-
-        # Now a vertical layout for the two images, each with a label above it
-        images_layout = QVBoxLayout()
-
-        # 1) Contrasted-blurred label + image
-        self.label_cb_title = QLabel("Contrasted Blurred Image")
-        self.label_cb_title.setAlignment(Qt.AlignCenter)
-        images_layout.addWidget(self.label_cb_title)
-
-        self.label_contrasted_blurred = QLabel()
-        self.label_contrasted_blurred.setAlignment(Qt.AlignCenter)
-        self.label_contrasted_blurred.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
-        images_layout.addWidget(self.label_contrasted_blurred)
-
-        # 2) Cost image label + image
-        self.label_cost_title = QLabel("Current COST IMAGE")
-        self.label_cost_title.setAlignment(Qt.AlignCenter)
-        images_layout.addWidget(self.label_cost_title)
-
-        self.label_cost_image = QLabel()
-        self.label_cost_image.setAlignment(Qt.AlignCenter)
-        self.label_cost_image.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
-        images_layout.addWidget(self.label_cost_image)
-
-        main_layout.addLayout(images_layout)
-
-    def showEvent(self, event):
-        """ When shown, ask parent to resize to accommodate. """
-        super().showEvent(event)
-        if self.parentWidget():
-            self.parentWidget().adjustSize()
-
-    def resizeEvent(self, event):
-        """
-        Keep the images at correct aspect ratio by re-scaling
-        our stored pixmaps to the new label sizes.
-        """
-        super().resizeEvent(event)
-        self._update_labels()
-
-    def _update_labels(self):
-        if self._last_cb_pix is not None:
-            scaled_cb = self._last_cb_pix.scaled(
-                self.label_contrasted_blurred.size(),
-                Qt.KeepAspectRatio,
-                Qt.SmoothTransformation
-            )
-            self.label_contrasted_blurred.setPixmap(scaled_cb)
-
-        if self._last_cost_pix is not None:
-            scaled_cost = self._last_cost_pix.scaled(
-                self.label_cost_image.size(),
-                Qt.KeepAspectRatio,
-                Qt.SmoothTransformation
-            )
-            self.label_cost_image.setPixmap(scaled_cost)
-
-    def _on_toggle_rainbow(self):
-        self._main_window.toggle_rainbow()
-
-    def _on_line_smoothing_slider(self, value):
-        self._lab_smoothing.setText(f"Line smoothing ({value})")
-        self._main_window.image_view.set_savgol_window_length(value)
-
-    def _on_contrast_slider(self, value):
-        clip_limit = value / 100.0
-        self._lab_contrast.setText(f"Contrast ({clip_limit:.2f})")
-        self._main_window.update_contrast(clip_limit)
-
-    def update_displays(self, contrasted_img_np, cost_img_np):
-        """
-        Called by main_window to refresh the two images in the advanced panel.
-        We'll store them as QPixmaps, then do the re-scale in _update_labels().
-        """
-        cb_pix = self._np_array_to_qpixmap(contrasted_img_np)
-        cost_pix = self._np_array_to_qpixmap(cost_img_np, normalize=True)
-
-        self._last_cb_pix = cb_pix
-        self._last_cost_pix = cost_pix
-        self._update_labels()
-
-    def _np_array_to_qpixmap(self, arr, normalize=False):
-        if arr is None:
-            return None
-        arr_ = arr.copy()
-        if normalize:
-            mn, mx = arr_.min(), arr_.max()
-            if abs(mx - mn) < 1e-12:
-                arr_[:] = 0
-            else:
-                arr_ = (arr_ - mn) / (mx - mn)
-        arr_ = np.clip(arr_, 0, 1)
-        arr_255 = (arr_ * 255).astype(np.uint8)
-
-        h, w = arr_255.shape
-        qimage = QImage(arr_255.data, w, h, w, QImage.Format_Grayscale8)
-        return QPixmap.fromImage(qimage)
-
-
-# ------------------------------------------------------------------------
-# Main Window
-# ------------------------------------------------------------------------
-class MainWindow(QMainWindow):
-    def __init__(self):
-        super().__init__()
-        self.setWindowTitle("Test GUI")
-
-        self._last_loaded_pixmap = None
-        self._circle_calibrated_radius = 6
-        self._last_loaded_file_path = None
-
-        # For the contrast slider
-        self._current_clip_limit = 0.01
-
-        # Outer widget + layout
-        self._main_widget = QWidget()
-        self._main_layout = QHBoxLayout(self._main_widget)
-
-        # The "left" part: container for the image area + its controls
-        self._left_panel = QVBoxLayout()
-
-        # We'll make a container widget for the left panel, so we can set stretches:
-        self._left_container = QWidget()
-        self._left_container.setLayout(self._left_panel)
-
-        # Now we add them to the main layout with 70%:30% ratio
-        self._main_layout.addWidget(self._left_container, 7)  # 70%
-        
-        # We haven't added the advanced widget yet, but we'll do so with ratio=3 => 30%
-        self._advanced_widget = AdvancedSettingsWidget(self)
-        # Hide it initially
-        self._advanced_widget.hide()
-        self._main_layout.addWidget(self._advanced_widget, 3)
-
-        self.setCentralWidget(self._main_widget)
-
-        # The image view
-        self.image_view = ImageGraphicsView()
-        self._left_panel.addWidget(self.image_view)
-
-        # Button row
-        btn_layout = QHBoxLayout()
-        self.btn_load_image = QPushButton("Load Image")
-        self.btn_load_image.clicked.connect(self.load_image)
-        btn_layout.addWidget(self.btn_load_image)
-
-        self.btn_export_path = QPushButton("Export Path")
-        self.btn_export_path.clicked.connect(self.export_path)
-        btn_layout.addWidget(self.btn_export_path)
-
-        self.btn_clear_points = QPushButton("Clear Points")
-        self.btn_clear_points.clicked.connect(self.clear_points)
-        btn_layout.addWidget(self.btn_clear_points)
-
-        # "Advanced Settings" toggle
-        self.btn_advanced = QPushButton("Advanced Settings")
-        self.btn_advanced.setCheckable(True)
-        self.btn_advanced.clicked.connect(self._toggle_advanced_settings)
-        btn_layout.addWidget(self.btn_advanced)
-
-        self._left_panel.addLayout(btn_layout)
-
-        self.resize(1000, 600)
-        self._old_central_widget = None
-        self._editor = None
-
-    def _toggle_advanced_settings(self, checked):
-        if checked:
-            self._advanced_widget.show()
-        else:
-            self._advanced_widget.hide()
-        # Force re-layout
-        self.adjustSize()
-
-    def open_circle_editor(self):
-        """ Replace central widget with circle editor. """
-        if not self._last_loaded_pixmap:
-            print("No image loaded yet! Cannot open circle editor.")
-            return
-
-        old_widget = self.takeCentralWidget()
-        self._old_central_widget = old_widget
-
-        init_radius = self._circle_calibrated_radius
-        editor = CircleEditorWidget(
-            pixmap=self._last_loaded_pixmap,
-            init_radius=init_radius,
-            done_callback=self._on_circle_editor_done
-        )
-        self._editor = editor
-        self.setCentralWidget(editor)
-
-    def _on_circle_editor_done(self, final_radius):
-        self._circle_calibrated_radius = final_radius
-        print(f"Circle Editor done. Radius = {final_radius}")
-
-        if self._last_loaded_file_path:
-            cost_img = compute_cost_image(
-                self._last_loaded_file_path,
-                self._circle_calibrated_radius,
-                clip_limit=self._current_clip_limit
-            )
-            self.image_view.cost_image_original = cost_img
-            self.image_view.cost_image = cost_img.copy()
-            self.image_view._apply_all_guide_points_to_cost()
-            self.image_view._rebuild_full_path()
-            self._update_advanced_images()
-
-        editor_widget = self.takeCentralWidget()
-        if editor_widget is not None:
-            editor_widget.setParent(None)
-
-        if self._old_central_widget is not None:
-            self.setCentralWidget(self._old_central_widget)
-            self._old_central_widget = None
-
-        if self._editor is not None:
-            self._editor.deleteLater()
-            self._editor = None
-
-    def toggle_rainbow(self):
-        self.image_view.toggle_rainbow()
-
-    def load_image(self):
-        options = QFileDialog.Options()
-        file_path, _ = QFileDialog.getOpenFileName(
-            self, "Open Image", "",
-            "Images (*.png *.jpg *.jpeg *.bmp *.tif)",
-            options=options
-        )
-        if file_path:
-            self.image_view.load_image(file_path)
-
-            cost_img = compute_cost_image(
-                file_path,
-                self._circle_calibrated_radius,
-                clip_limit=self._current_clip_limit
-            )
-            self.image_view.cost_image_original = cost_img
-            self.image_view.cost_image = cost_img.copy()
-
-            pm = QPixmap(file_path)
-            if not pm.isNull():
-                self._last_loaded_pixmap = pm
-
-            self._last_loaded_file_path = file_path
-            self._update_advanced_images()
-
-    def update_contrast(self, clip_limit):
-        self._current_clip_limit = clip_limit
-        if self._last_loaded_file_path:
-            cost_img = compute_cost_image(
-                self._last_loaded_file_path,
-                self._circle_calibrated_radius,
-                clip_limit=clip_limit
-            )
-            self.image_view.cost_image_original = cost_img
-            self.image_view.cost_image = cost_img.copy()
-            self.image_view._apply_all_guide_points_to_cost()
-            self.image_view._rebuild_full_path()
-
-        self._update_advanced_images()
-
-    def _update_advanced_images(self):
-        if not self._last_loaded_pixmap:
-            return
-        pm_np = self._qpixmap_to_gray_float(self._last_loaded_pixmap)
-        contrasted_blurred = preprocess_image(
-            pm_np,
-            sigma=3,
-            clip_limit=self._current_clip_limit
-        )
-        cost_img_np = self.image_view.cost_image
-        self._advanced_widget.update_displays(contrasted_blurred, cost_img_np)
-
-    def _qpixmap_to_gray_float(self, qpix):
-        img = qpix.toImage()
-        img = img.convertToFormat(QImage.Format_ARGB32)
-        ptr = img.bits()
-        ptr.setsize(img.byteCount())
-        arr = np.frombuffer(ptr, np.uint8).reshape((img.height(), img.width(), 4))
-        rgb = arr[..., :3].astype(np.float32)
-        gray = rgb.mean(axis=2) / 255.0
-        return gray
-
-    def export_path(self):
-        """
-        Exports the path as a CSV in the format: x, y, TYPE,
-        ensuring that each anchor influences exactly one path point.
-        """
-        full_xy = self.image_view.get_full_path_xy()
-        if not full_xy:
-            print("No path to export.")
-            return
-
-        # We'll consider each anchor point as "USER-PLACED".
-        # But unlike a distance-threshold approach, we assign each anchor
-        # to exactly one closest path point.
-        anchor_points = self.image_view.anchor_points
-
-        # For each anchor, find the index of the closest path point
-        user_placed_indices = set()
-        for ax, ay in anchor_points:
-            min_dist = float('inf')
-            closest_idx = None
-            for i, (px, py) in enumerate(full_xy):
-                dist = math.hypot(px - ax, py - ay)
-                if dist < min_dist:
-                    min_dist = dist
-                    closest_idx = i
-            if closest_idx is not None:
-                user_placed_indices.add(closest_idx)
-
-        # Ask user for the CSV filename
-        options = QFileDialog.Options()
-        file_path, _ = QFileDialog.getSaveFileName(
-            self, "Export Path", "",
-            "CSV Files (*.csv);;All Files (*)",
-            options=options
-        )
-        if not file_path:
-            return
-
-        import csv
-        with open(file_path, 'w', newline='') as csvfile:
-            writer = csv.writer(csvfile)
-            writer.writerow(["x", "y", "TYPE"])
-
-            for i, (x, y) in enumerate(full_xy):
-                ptype = "USER-PLACED" if i in user_placed_indices else "PATH"
-                writer.writerow([x, y, ptype])
-
-        print(f"Exported path with {len(full_xy)} points to {file_path}")
-
-
-
-    def clear_points(self):
-        self.image_view.clear_guide_points()
-
-    def closeEvent(self, event):
-        super().closeEvent(event)
-
-
-def main():
-    app = QApplication(sys.argv)
-    window = MainWindow()
-    window.show()
-    sys.exit(app.exec_())
-
-
-if __name__ == "__main__":
-    main()