def _adjustCheciItem(self, textItem: QtWidgets.QGraphicsSimpleTextItem,
startPoint: QtCore.QPointF, endPoint: QtCore.QPointF):
"""
沿着斜线向endPoint方向调整车次标签的位置。必须保证垂直方向不越界。
"""
minY = min((startPoint.y(), endPoint.y()))
maxY = max((startPoint.y(), endPoint.y()))
w, h = textItem.boundingRect().width(), textItem.boundingRect().height(
)
if endPoint.x() == startPoint.x():
# 斜率不存在的特殊情况
dx = 0
dy = h
elif endPoint.y() == startPoint.y():
# k=0的特殊情况
dy = h
dx = w
else:
k = (endPoint.y() - startPoint.y()) / (endPoint.x() -
startPoint.x())
dy = h
dx = dy / k
if endPoint.y() < startPoint.y():
dy = -dy
dx = -dx
x, y = textItem.x(), textItem.y()
while minY <= y <= maxY:
for item in textItem.collidingItems():
if isinstance(item, QtWidgets.QGraphicsSimpleTextItem):
x += dx
y += dy
textItem.setPos(x, y)
break
else:
break
def _adjustTimeItem(self, textItem: QtWidgets.QGraphicsSimpleTextItem,
scale: int):
"""
向远离运行线的方向调整冲突的始发终到时刻标签的位置。scale为正负1，表示移动方向。
"""
w, h = textItem.boundingRect().width(), textItem.boundingRect().height(
)
y = textItem.y()
dy = h * scale
while 0 <= y <= self.sizes["height"] - h:
for item in textItem.collidingItems():
if isinstance(item, QtWidgets.QGraphicsSimpleTextItem):
y += dy
textItem.setY(y)
break
else:
break
