Function _rb_keep_item

SLiCAP/schematic/canvas.py:2677–2710

Return True if item should stay selected given scene_rect and mode. contains=True → right-to-left drag: item must be fully inside scene_rect. contains=False → left-to-right drag: item must intersect scene_rect. Uses tight per-type rects so that label bounding boxes on components

(item, scene_rect: QRectF, contains: bool)

def _rb_keep_item(item, scene_rect: QRectF, contains: bool) -> bool:
    """
    Return True if item should stay selected given scene_rect and mode.

    contains=True  → right-to-left drag: item must be fully inside scene_rect.
    contains=False → left-to-right drag: item must intersect scene_rect.

    Uses tight per-type rects so that label bounding boxes on components and
    wires don't trigger selection when the rubber-band is far from the body.
    """
    from .component_item import ComponentItem, SYMBOL_TIGHT_RECT
    from .wire_item import WireItem
    if isinstance(item, WireItem):
        if contains:
            return all(scene_rect.contains(pt) for pt in item.points)
        # intersects: build a tight rect from the wire points, ignoring the label
        pts = item.points
        if not pts:
            return False
        xs = [p.x() for p in pts]
        ys = [p.y() for p in pts]
        tol = 3.0
        path_rect = QRectF(min(xs) - tol, min(ys) - tol,
                           max(xs) - min(xs) + 2 * tol,
                           max(ys) - min(ys) + 2 * tol)
        return scene_rect.intersects(path_rect)
    if isinstance(item, ComponentItem):
        tight = SYMBOL_TIGHT_RECT.get(item.symbol_name)
        local_rect = QRectF(*tight) if tight else QRectF(-30, -30, 60, 60)
        item_rect = item.mapRectToScene(local_rect)
        return scene_rect.contains(item_rect) if contains else scene_rect.intersects(item_rect)
    # JunctionItem, FreeTextItem, CommandItem, etc. — use actual bounding rect (no labels)
    item_rect = item.mapRectToScene(item.boundingRect())
    return scene_rect.contains(item_rect) if contains else scene_rect.intersects(item_rect)


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