feat: finally a working super simple pattern

grid/ui/items.py

@@ -9,17 +9,29 @@ from PySide6.QtWidgets import (
 
 
 class SphereGraphicsItem(QGraphicsEllipseItem):
+    """Single sphere of a static size."""
+
     SPHERE_WIDTH = 30
 
     def __init__(self, x_pos: int, y_pos: int) -> None:
+        """Create a sphere
+
+        Args:
+            x_pos (int): x coordinate of the center
+            y_pos (int): y coordinate of the center
+        """
         super().__init__(
-            self.SPHERE_WIDTH / 2,
-            self.SPHERE_WIDTH / 2,
+            x_pos - self.SPHERE_WIDTH / 2,
+            y_pos - self.SPHERE_WIDTH / 2,
             self.SPHERE_WIDTH,
             self.SPHERE_WIDTH,
         )
-        print(f"sphere at {x_pos}:{y_pos}")
-        self.setPos(x_pos, y_pos)
+        self.x_pos = x_pos - self.SPHERE_WIDTH / 2
+        self.y_pos = y_pos - self.SPHERE_WIDTH / 2
+        print(f"sphere at {self.x_pos}:{self.y_pos}")
+
+        # self.setPos(self.x_pos - self.SPHERE_WIDTH/2, self.y_pos - self.SPHERE_WIDTH/2)
+        # super().moveBy(x_pos - center.x(), y_pos - center.y())
         brush = QBrush(Qt.GlobalColor.darkBlue)
         self.setBrush(brush)
         pen = QPen(Qt.GlobalColor.blue)
@@ -27,8 +39,13 @@ class SphereGraphicsItem(QGraphicsEllipseItem):
         self.setPen(pen)
         self.show()
 
+    def boundingRect(self) -> QRectF:
+        return QRectF(self.x_pos, self.y_pos, self.SPHERE_WIDTH, self.SPHERE_WIDTH)
+
 
 class ArcGraphicsItem(QGraphicsItem):
+    """Circle arc."""
+
     def __init__(
         self,
         x_pos: int,
@@ -38,13 +55,25 @@ class ArcGraphicsItem(QGraphicsItem):
         angle_end: int,
         parent: QGraphicsItem | None = ...,
     ):
+        """Construct a circle arc.
+
+        Args:
+            x_pos (int): x center of the circle
+            y_pos (int): y center of the circle
+            width (int): width of the circle
+            angle_start (int): Angle start in human degree
+            angle_end (int): Angle end in human degree
+            parent (QGraphicsItem | None, optional): _description_. Defaults to ....
+        """
         super().__init__(parent)
         shift = int(width / 2)
         self.x_pos = x_pos - shift
         self.y_pos = y_pos - shift
-        self.width = width * 2
-        self.angle_start = angle_start * 16
-        self.angle_end = angle_end * 16
+        self.width = width
+        self.angle_start = angle_start
+        self.angle_end = angle_end
+        self.draw_angle_start = int(angle_start / 16)
+        self.draw_angle_end = int(angle_end * 16)
         print(
             f"arc from {self.x_pos}:{self.y_pos} of {self.width} {self.angle_start}° {self.angle_end}°"
         )
@@ -60,12 +89,12 @@ class ArcGraphicsItem(QGraphicsItem):
             self.y_pos,
             self.width,
             self.width,
-            self.angle_start,
-            self.angle_end,
+            self.draw_angle_start,
+            self.draw_angle_end,
         )
 
     def boundingRect(self) -> QRectF:
-        return QRectF(0, 0, self.x_pos, self.y_pos)
+        return QRectF(self.x_pos, self.y_pos, self.width, self.width)
 
 
 class LineGraphicsItem(QGraphicsItem):