96 lines
3.0 KiB
Python
96 lines
3.0 KiB
Python
# -*- coding: utf-8 -*-
|
|
"""
|
|
This example demonstrates the creation of a plot with
|
|
DateAxisItem and a customized ViewBox.
|
|
"""
|
|
|
|
|
|
import initExample ## Add path to library (just for examples; you do not need this)
|
|
|
|
import pyqtgraph as pg
|
|
from pyqtgraph.Qt import QtCore, QtGui
|
|
import numpy as np
|
|
import time
|
|
|
|
class CustomViewBox(pg.ViewBox):
|
|
def __init__(self, *args, **kwds):
|
|
kwds['enableMenu'] = False
|
|
pg.ViewBox.__init__(self, *args, **kwds)
|
|
self.setMouseMode(self.RectMode)
|
|
|
|
## reimplement right-click to zoom out
|
|
def mouseClickEvent(self, ev):
|
|
if ev.button() == QtCore.Qt.MouseButton.RightButton:
|
|
self.autoRange()
|
|
|
|
## reimplement mouseDragEvent to disable continuous axis zoom
|
|
def mouseDragEvent(self, ev, axis=None):
|
|
if axis is not None and ev.button() == QtCore.Qt.MouseButton.RightButton:
|
|
ev.ignore()
|
|
else:
|
|
pg.ViewBox.mouseDragEvent(self, ev, axis=axis)
|
|
|
|
class CustomTickSliderItem(pg.TickSliderItem):
|
|
def __init__(self, *args, **kwds):
|
|
pg.TickSliderItem.__init__(self, *args, **kwds)
|
|
|
|
self.all_ticks = {}
|
|
self._range = [0,1]
|
|
|
|
def setTicks(self, ticks):
|
|
for tick, pos in self.listTicks():
|
|
self.removeTick(tick)
|
|
|
|
for pos in ticks:
|
|
tickItem = self.addTick(pos, movable=False, color="#333333")
|
|
self.all_ticks[pos] = tickItem
|
|
|
|
self.updateRange(None, self._range)
|
|
|
|
def updateRange(self, vb, viewRange):
|
|
origin = self.tickSize/2.
|
|
length = self.length
|
|
|
|
lengthIncludingPadding = length + self.tickSize + 2
|
|
|
|
self._range = viewRange
|
|
|
|
for pos in self.all_ticks:
|
|
tickValueIncludingPadding = (pos - viewRange[0]) / (viewRange[1] - viewRange[0])
|
|
tickValue = (tickValueIncludingPadding*lengthIncludingPadding - origin) / length
|
|
|
|
# Convert from np.bool_ to bool for setVisible
|
|
visible = bool(tickValue >= 0 and tickValue <= 1)
|
|
|
|
tick = self.all_ticks[pos]
|
|
tick.setVisible(visible)
|
|
|
|
if visible:
|
|
self.setTickValue(tick, tickValue)
|
|
|
|
app = pg.mkQApp()
|
|
|
|
axis = pg.DateAxisItem(orientation='bottom')
|
|
vb = CustomViewBox()
|
|
|
|
pw = pg.PlotWidget(viewBox=vb, axisItems={'bottom': axis}, enableMenu=False, title="PlotItem with DateAxisItem, custom ViewBox and markers on x axis<br>Menu disabled, mouse behavior changed: left-drag to zoom, right-click to reset zoom")
|
|
|
|
dates = np.arange(8) * (3600*24*356)
|
|
pw.plot(x=dates, y=[1,6,2,4,3,5,6,8], symbol='o')
|
|
|
|
# Using allowAdd and allowRemove to limit user interaction
|
|
tickViewer = CustomTickSliderItem(allowAdd=False, allowRemove=False)
|
|
vb.sigXRangeChanged.connect(tickViewer.updateRange)
|
|
pw.plotItem.layout.addItem(tickViewer, 4, 1)
|
|
|
|
tickViewer.setTicks( [dates[0], dates[2], dates[-1]] )
|
|
|
|
pw.show()
|
|
pw.setWindowTitle('pyqtgraph example: customPlot')
|
|
|
|
r = pg.PolyLineROI([(0,0), (10, 10)])
|
|
pw.addItem(r)
|
|
|
|
if __name__ == '__main__':
|
|
pg.exec()
|