Added line width scaling on map zoom

src/GridCal/Gui/Diagrams/MapWidget/Branches/map_line_container.py

@@ -63,6 +63,16 @@ def __init__(self,
         self.enabled = True
         self.original = True
 
+    def setWidthScale(self, val: float):
+        """
+        Set the width scale of the line
+        :param val:
+        """
+        for segment in self.segments_list:
+            pen = segment.pen()  # get the current pen
+            pen.setWidthF(val)  # Set the fractional thickness of the line
+            segment.setPen(pen)  # Assign the pen to the line item
+
     def clean_segments(self) -> None:
         """
         Remove all segments from the scene

src/GridCal/Gui/Diagrams/MapWidget/grid_map_widget.py

@@ -22,7 +22,8 @@
 from collections.abc import Callable
 from PySide6.QtSvg import QSvgGenerator
 from PySide6.QtCore import (Qt, QSize, QRect, QMimeData, QIODevice, QByteArray, QDataStream, QModelIndex)
-from PySide6.QtGui import (QIcon, QPixmap, QImage, QPainter, QStandardItemModel, QStandardItem, QColor, QDropEvent)
+from PySide6.QtGui import (QIcon, QPixmap, QImage, QPainter, QStandardItemModel, QStandardItem, QColor, QDropEvent,
+                           QWheelEvent)
 
 from GridCalEngine.Devices.Diagrams.map_location import MapLocation
 from GridCalEngine.Devices.Substation import Bus
@@ -819,6 +820,26 @@ def dropEvent(self, event: QDropEvent):
                 self.circuit.add_substation(obj=api_object)
                 self.add_api_substation(api_object=api_object, lat=lat, lon=lon, r=0.01)
 
+    def wheelEvent(self, event: QWheelEvent):
+        """
+
+        :param event:
+        :return:
+        """
+        max_zoom = self.map.max_level
+        min_zoom = self.map.min_level
+        zoom = self.map.zoom_factor
+        scale = 0.1 + zoom / (max_zoom - min_zoom)
+
+        # rescale lines
+        for dev_tpe in [DeviceType.LineDevice,
+                        DeviceType.DCLineDevice,
+                        DeviceType.HVDCLineDevice,
+                        DeviceType.FluidPathDevice]:
+            graphics_dict = self.graphics_manager.get_device_type_dict(device_type=dev_tpe)
+            for key, lne in graphics_dict.items():
+                lne.setWidthScale(scale)
+
     def change_size_and_pen_width_all(self, new_radius, pen_width):
         """
         Change the size and pen width of all elements in Schema.

src/GridCal/Gui/Diagrams/MapWidget2/map_widget.py

@@ -755,6 +755,7 @@ def wheelEvent(self, event: QWheelEvent):
         """
         Handle a mouse wheel rotation.
         """
+        self.editor.wheelEvent(event)
 
     def resizeEvent(self, event: QResizeEvent = None, updateDiagram: bool = True):
         """