How to open context menu for an object that is empty, but has a size? - pyqt5

Question

I am creating a GUI for a dependency graphing software... And am not able to figure out how to get a context menu to open for my lines.
What I want to do, right click on/near a MyLine widget and open a context menu... What is happening right clicks are not detected.
It is currently not detecting right clicks on the line widgets location to open a context menu (Purpose of this is to allow the user to delete/edit lines by right clicking on them).
What am I doing wrong here?
class MyLine(QWidget):
def __init__(self, destination: Node, source: Node, parent=None):
super().__init__(parent)
self.setContextMenuPolicy(Qt.CustomContextMenu)
self.customContextMenuRequested.connect(self.showMenu)
self.destination = destination
self.source = source
self.setAutoFillBackground(True)
p = self.palette()
p.setColor(self.backgroundRole(), Qt.red)
self.setPalette(p)
def update_line_size(self):
origin = self.source.get_line_draw_pos(self.destination.pos())
destination = self.destination.get_line_draw_pos(self.source.pos())
leftcornerX = origin.x() if origin.x() < destination.x() else destination.x()
leftcornerY = origin.y() if origin.y() < destination.y() else destination.y()
sizeX = abs(origin.x() - destination.x())
sizeY = abs(origin.y() - destination.y())
self.setGeometry(leftcornerX, leftcornerY, sizeX, sizeY)
def showMenu(self, _):
menu = QMenu()
menu.addAction("Delete", self.remove)
menu.exec_(self.cursor().pos())
def draw(self, painter: QPainter):
origin = self.source.get_line_draw_pos(self.destination.pos())
destination = self.destination.get_line_draw_pos(self.source.pos())
painter.drawLine(origin, destination)
# DRAW ARROW HEAD
ARROW_SIZE = 10 # Might change
line_angle = calculate_line_angle(destination, origin)
draw_arrow_head(destination, painter, line_angle, ARROW_SIZE)
def remove(self):
self.parent().delete_line(self)
self.deleteLater()
Edit:
required types for reproducibility
class Node(QLabel):
def __init__(self, text: str, parent=None):
super().__init__(text, parent)
self.setContextMenuPolicy(Qt.CustomContextMenu)
self.customContextMenuRequested.connect(self.showMenu)
def get_line_draw_pos(self, other_side: QPoint):
x = self.pos().x() if other_side.x() < self.pos().x() else (self.pos().x() + self.width())
y = self.pos().y() if other_side.y() < self.pos().y() else (self.pos().y() + self.height())
return QPoint(x, y)
def showMenu(self, _):
pass #purposefully left as a stub
def calculate_line_angle(destination: QPoint, origin: QPoint):
return math.atan2(destination.y() - origin.y(), destination.x() - origin.x())
def draw_arrow_head(destination: QPoint, painter: QPainter, line_angle: float, arrow_size: float = 10):
angle1 = math.radians(22.5) + line_angle
angle2 = math.radians(-22.5) + line_angle
arrow1 = QPoint( int(destination.x() - arrow_size * math.cos(angle1)), int(destination.y() - arrow_size * math.sin(angle1)))
arrow2 = QPoint( int(destination.x() - arrow_size * math.cos(angle2)), int(destination.y() - arrow_size * math.sin(angle2)))
painter.drawLine(destination, arrow1)
painter.drawLine(destination, arrow2)
class MainWindow(QWidget):
def __init__(self):
super().__init__()
self.setAcceptDrops(True) # add a drop rule
self.setMouseTracking(True)
self.track_origin = None
self.track_mouse = QPoint(0,0)
self.lines = []
def paintEvent(self, event):
painter = QPainter(self)
for line in self.lines:
line.draw(painter)
line.update_line_size()
def connectNodes(self, destination: Node, source: Node):
self.lines.append(MyLine(destination, source))
self.update()
def delete_line(self, line: MyLine):
self.lines.remove(line)
self.update()
app = QApplication([])
window = MainWindow()
window.setWindowTitle("Right Click to remove label")
window.setGeometry(100, 100, 400, 200)
window.move(60,15)
nodes = []
for index, node_name in enumerate(["hello.txt", "not_a_villain.txt", "nope.txt"]):
node = Node(node_name, window)
node.move(50 + index*100, 50 + (index%2) * 50)
nodes.append(node)
window.connectNodes(nodes[0], nodes[1])
window.connectNodes(nodes[0], nodes[2])
window.connectNodes(nodes[1], nodes[2])
window.show()
sys.exit(app.exec_())