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if __name__ == '__main__':
import os, sys
path = os.path.abspath(os.path.dirname(__file__))
sys.path.insert(0, os.path.join(path, '..', '..'))
from pyqtgraph.Qt import QtGui, QtCore
import pyqtgraph.functions as fn
import weakref
from .UIGraphicsItem import UIGraphicsItem
__all__ = ['VTickGroup']
class VTickGroup(UIGraphicsItem):
"""
**Bases:** :class:`UIGraphicsItem <pyqtgraph.UIGraphicsItem>`
Draws a set of tick marks which always occupy the same vertical range of the view,
but have x coordinates relative to the data within the view.
"""
def __init__(self, xvals=None, yrange=None, pen=None):
"""
============= ===================================================================
**Arguments**
xvals A list of x values (in data coordinates) at which to draw ticks.
yrange A list of [low, high] limits for the tick. 0 is the bottom of
the view, 1 is the top. [0.8, 1] would draw ticks in the top
fifth of the view.
pen The pen to use for drawing ticks. Default is grey. Can be specified
as any argument valid for :func:`mkPen<pyqtgraph.mkPen>`
============= ===================================================================
"""
if yrange is None:
yrange = [0, 1]
if xvals is None:
xvals = []
UIGraphicsItem.__init__(self)
if pen is None:
pen = (200, 200, 200)
self.path = QtGui.QGraphicsPathItem()
self.ticks = []
self.xvals = []
self.yrange = [0,1]
self.setPen(pen)
self.setYRange(yrange)
self.setXVals(xvals)
def setPen(self, *args, **kwargs):
"""Set the pen to use for drawing ticks. Can be specified as any arguments valid
for :func:`mkPen<pyqtgraph.mkPen>`"""
self.pen = fn.mkPen(*args, **kwargs)
def setXVals(self, vals):
"""Set the x values for the ticks.
============= =====================================================================
**Arguments**
vals A list of x values (in data/plot coordinates) at which to draw ticks.
============= =====================================================================
"""
self.xvals = vals
self.rebuildTicks()
#self.valid = False
def setYRange(self, vals):
"""Set the y range [low, high] that the ticks are drawn on. 0 is the bottom of
the view, 1 is the top."""
self.yrange = vals
self.rebuildTicks()
def dataBounds(self, *args, **kargs):
return None ## item should never affect view autoscaling
def yRange(self):
return self.yrange
def rebuildTicks(self):
self.path = QtGui.QPainterPath()
yrange = self.yRange()
for x in self.xvals:
self.path.moveTo(x, 0.)
self.path.lineTo(x, 1.)
def paint(self, p, *args):
UIGraphicsItem.paint(self, p, *args)
br = self.boundingRect()
h = br.height()
br.setY(br.y() + self.yrange[0] * h)
br.setHeight(h - (1.0-self.yrange[1]) * h)
p.translate(0, br.y())
p.scale(1.0, br.height())
p.setPen(self.pen)
p.drawPath(self.path)
if __name__ == '__main__':
app = QtGui.QApplication([])
import pyqtgraph as pg
vt = VTickGroup([1,3,4,7,9], [0.8, 1.0])
p = pg.plot()
p.addItem(vt)
if sys.flags.interactive == 0:
app.exec_()
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