def closestPoint(self, pos):
"""
Find the closest curve point for a specific position
:param QPoint pos: Position, where to look for the closest curve point
:return: tuple `(index, dist)`
`dist` is the distance between the position and the closest curve
point. `index` is the index of the closest curve point, or -1 if
none can be found ( f.e when the curve has no points ).
.. note::
`closestPoint()` implements a dumb algorithm, that iterates
over all points
"""
numSamples = self.dataSize()
if self.plot() is None or numSamples <= 0:
return -1
series = self.data()
xMap = self.plot().canvasMap(self.xAxis())
yMap = self.plot().canvasMap(self.yAxis())
index = -1
dmin = 1.0e10
for i in range(numSamples):
sample = series.sample(i)
cx = xMap.transform(sample.x()) - pos.x()
cy = yMap.transform(sample.y()) - pos.y()
f = qwtSqr(cx) + qwtSqr(cy)
if f < dmin:
index = i
dmin = f
dist = np.sqrt(dmin)
return index, dist
def closestPoint(self, pos):
"""
Find the closest curve point for a specific position
:param QPoint pos: Position, where to look for the closest curve point
:return: tuple `(index, dist)`
`dist` is the distance between the position and the closest curve
point. `index` is the index of the closest curve point, or -1 if
none can be found ( f.e when the curve has no points ).
.. note::
`closestPoint()` implements a dumb algorithm, that iterates
over all points
"""
numSamples = self.dataSize()
if self.plot() is None or numSamples <= 0:
return -1
series = self.data()
xMap = self.plot().canvasMap(self.xAxis())
yMap = self.plot().canvasMap(self.yAxis())
index = -1
dmin = 1.0e10
for i in range(numSamples):
sample = series.sample(i)
cx = xMap.transform(sample.x())-pos.x()
cy = yMap.transform(sample.y())-pos.y()
f = qwtSqr(cx)+qwtSqr(cy)
if f < dmin:
index = i
dmin = f
dist = np.sqrt(dmin)
return index, dist
def closestPoint(self, pos):
numSamples = self.dataSize()
if self.plot() is None or numSamples <= 0:
return -1
series = self.data()
xMap = self.plot().canvasMap(self.xAxis())
yMap = self.plot().canvasMap(self.yAxis())
index = -1
dmin = 1.0e10
for i in range(numSamples):
sample = series.sample(i)
cx = xMap.transform(sample.x())-pos.x()
cy = yMap.transform(sample.y())-pos.y()
f = qwtSqr(cx)+qwtSqr(cy)
if f < dmin:
index = i
dmin = f
dist = np.sqrt(dmin)
return index, dist
def closestPoint(self, pos):
numSamples = self.dataSize()
if self.plot() is None or numSamples <= 0:
return -1
series = self.data()
xMap = self.plot().canvasMap(self.xAxis())
yMap = self.plot().canvasMap(self.yAxis())
index = -1
dmin = 1.0e10
for i in range(numSamples):
sample = series.sample(i)
cx = xMap.transform(sample.x()) - pos.x()
cy = yMap.transform(sample.y()) - pos.y()
f = qwtSqr(cx) + qwtSqr(cy)
if f < dmin:
index = i
dmin = f
dist = np.sqrt(dmin)
return index, dist
