def relationship_pixmap(self, str_object_class_name_list):
"""A pixmap for the given object_class name list,
created by rendering several object pixmaps next to each other."""
if not str_object_class_name_list:
engine = CharIconEngine("\uf1b3", 0)
return engine.pixmap(self.ICON_SIZE)
object_class_name_list = tuple(str_object_class_name_list.split(","))
if object_class_name_list in self.rel_cls_pixmap_cache:
return self.rel_cls_pixmap_cache[object_class_name_list]
scene = QGraphicsScene()
x = 0
for j, object_class_name in enumerate(object_class_name_list):
pixmap = self.object_pixmap(object_class_name)
pixmap_item = scene.addPixmap(pixmap)
if j % 2 == 0:
y = 0
else:
y = -0.875 * 0.75 * pixmap_item.boundingRect().height()
pixmap_item.setZValue(-1)
pixmap_item.setPos(x, y)
x += 0.875 * 0.5 * pixmap_item.boundingRect().width()
pixmap = QPixmap(scene.itemsBoundingRect().toRect().size())
pixmap.fill(Qt.transparent)
painter = QPainter(pixmap)
painter.setRenderHint(QPainter.Antialiasing, True)
scene.render(painter)
painter.end()
self.rel_cls_pixmap_cache[object_class_name_list] = pixmap
return pixmap
def draw_text(expected: QPainter, x: int, y: int, text: str):
window = expected.window()
scene = QGraphicsScene(0, 0, window.width(), window.height())
text_item = scene.addSimpleText(text)
font = expected.font()
text_item.setFont(font)
center_text_item(text_item, x, y)
scene.render(expected)
