def to_svg(self, path, scale=10, dpi=100, title='', description=''):
"""Render the scene to SVG"""
from QtShim.QtSvg import QSvgGenerator
generator = QSvgGenerator()
generator.setFileName(str(path))
generator.setTitle(str(title))
generator.setDescription(str(description))
generator.setResolution(dpi)
# Fixme: scale
# Scale applied to (x,y) and radius but not line with
self._scale = scale
bounding_box = self._scene.bounding_box
size = QSize(*[x * self._scale for x in bounding_box.size])
view_box = QRectF(*[x * self._scale for x in bounding_box.rect])
generator.setSize(size)
generator.setViewBox(view_box)
painter = QPainter()
painter.begin(generator)
self.paint(painter)
painter.end()
self._scale = None
def paint_ImageItem(self, item):
vertices = self.cast_item_positions(item)
rec = QRectF(vertices[0], vertices[1])
image = item.image
height, width, bytes_per_line = image.shape
bytes_per_line *= width
qimage = QImage(image, width, height, bytes_per_line,
QImage.Format_RGB888)
self._painter.drawImage(rec, qimage)
def _paint_arc(self, item, center, radius_x, radius_y):
if item.is_closed:
self._painter.drawEllipse(center, radius_x, radius_y)
else:
# drawArc cannot be filled !
rectangle = QRectF(
center + QPointF(-radius_x, radius_y),
center + QPointF(radius_x, -radius_y),
)
start_angle, stop_angle = [
int(angle * 16)
for angle in (item.start_angle, item.stop_angle)
]
span_angle = stop_angle - start_angle
if span_angle < 0:
span_angle = 5760 + span_angle
self._painter.drawArc(rectangle, start_angle, span_angle)