def create_ellipse_path(data):
path = QPainterPath()
path.addEllipse(QPointF(data.get('cx'), data.get('cy')), data.get('rx'),
data.get('ry'))
if 'transform' in data:
m = re.match('^matrix\\((.+)\\)$', data.get('transform'))
if m:
args = map(lambda x: float(x), m.group(1).split())
if len(args) == 6:
transform = QTransform(*args)
path *= transform
return path
def shape(self):
path = QPainterPath()
path.addEllipse(self.boundingRect())
return path
def paintEvent(self, event: QPaintEvent) -> None:
p = QPainter(self)
self.m_normalMap.render(p, event.rect())
p.setPen(Qt.black)
p.drawText(
self.rect(),
Qt.AlignBottom | Qt.TextWordWrap,
"Map data CCBYSA 2009 OpenStreetMap.org contributors",
)
p.end()
if self.zoomed:
dim = min(self.width(), self.height())
magnifierSize = min(MAX_MAGNIFIER, dim * 2 / 3)
radius = magnifierSize / 2
ring = radius - 15
box = QSize(magnifierSize, magnifierSize)
if self.maskPixmap.size() != box:
self.maskPixmap = QPixmap(box)
self.maskPixmap.fill(Qt.transparent)
g = QRadialGradient()
g.setCenter(radius, radius)
g.setFocalPoint(radius, radius)
g.setRadius(radius)
g.setColorAt(1.0, QColor(255, 255, 255, 0))
g.setColorAt(0.5, QColor(128, 128, 128, 255))
mask = QPainter(self.maskPixmap)
mask.setRenderHint(QPainter.Antialiasing)
mask.setCompositionMode(QPainter.CompositionMode_Source)
mask.setBrush(g)
mask.setPen(Qt.NoPen)
mask.drawRect(self.maskPixmap.rect())
mask.setBrush(QColor(Qt.transparent))
mask.drawEllipse(g.center(), ring, ring)
mask.end()
center = self.dragPos - QPoint(0, radius)
center = center + QPoint(0, radius / 2)
corner = center - QPoint(radius, radius)
xy = center * 2 - QPoint(radius, radius)
# only set the dimension to the magnified portion
if self.zoomPixmap.size() != box:
zoomPixmap = QPixmap(box)
zoomPixmap.fill(Qt.lightGray)
if True:
p = QPainter(zoomPixmap)
p.translate(-xy)
self.m_largeMap.render(p, QRect(xy, box))
p.end()
clipPath = QPainterPath()
clipPath.addEllipse(center, ring, ring)
p = QPainter(self)
p.setRenderHint(QPainter.Antialiasing)
p.setClipPath(clipPath)
p.drawPixmap(corner, zoomPixmap)
p.setClipping(False)
p.drawPixmap(corner, self.maskPixmap)
p.setPen(Qt.gray)
p.drawPath(clipPath)
if self.invert:
p = QPainter(self)
p.setCompositionMode(QPainter.CompositionMode_Difference)
p.fillRect(event.rect(), Qt.white)
p.end()