pySimBlocks.gui.graphics.connection_item¶

class pySimBlocks.gui.graphics.connection_item.OrthogonalRoute(points: list[QPointF])[source]¶

Bases: object

Store routed connection points and the segment being dragged.

points¶: Ordered route points in scene coordinates.

dragged_index¶: Index of the segment currently being dragged.

class pySimBlocks.gui.graphics.connection_item.ConnectionItem(src_port: PortItem | None, dst_port: PortItem | None, instance: ConnectionInstance, points: list[QPointF] | None = None)[source]¶

Bases: QGraphicsPathItem

Render and interact with a connection between two ports.

src_port¶: Source port item of the connection.

dst_port¶: Destination port item of the connection.

instance¶: Connection model represented by this item.

is_temporary¶: Whether the connection is currently incomplete.

is_manual¶: Whether the route was manually adjusted.

route¶: Current orthogonal route definition.

OFFSET = 8¶

MARGIN = 12¶

DETOUR = 8¶

PICK_TOL = 6¶

GRID = 5¶

update_position()[source]¶: Recompute the displayed route from the current port positions.

update_temp_position(scene_pos: QPointF)[source]¶

Update the temporary route endpoint while dragging.

Parameters:: scene_pos – Current mouse position in scene coordinates.

apply_manual_route(points: list[QPointF])[source]¶

Apply a persisted manual route to the connection.

Parameters:: points – Route points in scene coordinates.

invalidate_manual_route()[source]¶: Discard any manual route so the next update recomputes it.

segment_at(scene_pos: QPointF) → int | None[source]¶

Return the route segment index located near the given scene point.

Parameters:: scene_pos – Scene position to test.
Returns:: Index of the matching segment, or None if none is close enough.

shape()[source]¶

Return an enlarged hit shape so connections are easier to select.

Returns:: Stroke path used for hit testing.

mousePressEvent(event)[source]¶

Start manual segment dragging when pressing a routed segment.

Parameters:: event – Qt mouse-press event.

mouseMoveEvent(event)[source]¶

Move the selected orthogonal segment during manual route editing.

Parameters:: event – Qt mouse-move event.

mouseReleaseEvent(event)[source]¶

Finish manual segment dragging.

Parameters:: event – Qt mouse-release event.