<https://lh3.googleusercontent.com/-gAP0_Jp0-aw/V-tAqE3YBhI/AAAAAAAAABY/kQ6_856NotESHEO2mIDDGfbKt7qM9RIbACLcB/s1600/mplot.png>
I am new to pyqtgraph. I modified a multiaxis example that I found on the
Internet and placed into a PyQt4 GraphicsView widget. The example shows the
third axis before I embedded into the GUI, however when I embed, the third
axis doesn't show up. I have read everything that I can find with no luck.
Can someone please help? Ideally, I would like for the third axis to appear
just to the right of the second axis.The graph is pictured above. Here is
the code:
#imports
from PyQt4 import QtGui
from PyQt4 import QtCore
import ui_test #Gui File
import sys
import pyqtgraph as pg
class Gui(QtGui.QMainWindow, ui_test.Ui_MainWindow):
def __init__(self):
super(self.__class__, self).__init__()
self.setupUi(self)
self.pg_plot()
self.updateViews()
self.plotdata()
self.pushButton_movecursor.clicked.connect(self.movecursor)
def pg_plot(self):
## Switch to using white background and black foreground
self.bepx = 30
self.bepy = 800
pg.setConfigOption('background', 'w')
pg.setConfigOption('foreground', 'k')
lr = pg.LinearRegionItem([20,40], movable = False, brush =
'#ffcccc33') #Set linear region
self.p1 = pg.PlotItem()
self.p1.addItem(lr)
self.graphicsView.setCentralWidget(self.p1)
self.p1.showGrid(x = True, y = True ,alpha = 0.3)
## create a new ViewBox, link the right axis to its coordinate
system
self.p2 = pg.ViewBox()
self.p1.showAxis('right')
self.p1.scene().addItem(self.p2)
self.p1.getAxis('right').linkToView(self.p2)
self.p2.setXLink(self.p1)
self.p1.getAxis('right').setLabel('eff', color='g')
pg.LinearRegionItem([20,40])
## create third ViewBox.
## this time we need to create a new axis as well.
self.p3 = pg.ViewBox()
ax3 = pg.AxisItem('right')
self.p1.layout.addItem(ax3,2,3)
self.p1.scene().addItem(self.p3)
ax3.linkToView(self.p3)
self.p3.setXLink(self.p1)
ax3.setZValue(-10000)
ax3.setLabel('Power', color='r')
self.arrow = pg.ArrowItem(angle=90)
self.text = pg.TextItem(html='<div style="text-align: center"><span
style="color: 'b' ;">^</span><br><span style="color: #000; font-size:
16pt;">BEP</span></div>', anchor=(-0.3,1.3), border='w', fill=(255, 255,
255, 100))
self.p3.addItem(self.text)
self.p3.addItem(self.arrow)
self.text.setPos(self.bepx - 1.2, self.bepy - 530)
ax3.setStyle(showValues=False) #Not needed workig on gridlines
## Handle view resizing
def updateViews(self):
## view has resized; update auxiliary views to match
self.p2.setGeometry(self.p1.vb.sceneBoundingRect())
self.p3.setGeometry(self.p1.vb.sceneBoundingRect())
## need to re-update linked axes since this was called
## incorrectly while views had different shapes.
## (probably this should be handled in ViewBox.resizeEvent)
self.p2.linkedViewChanged(self.p1.vb, self.p2.XAxis)
self.p3.linkedViewChanged(self.p1.vb, self.p3.XAxis)
def plotdata(self):
#Plot Datapoints
self.p1.plot([0,10,20,30,40,50], [1,2,4,8,16,32], pen = 'g')
self.p2.addItem(pg.PlotCurveItem([0,10,20,30,40,50],
[10,20,40,80,40,20], pen='b'))
self.p3.addItem(pg.PlotCurveItem([0,10,20,30,40,50],
[3200,1600,800,2500,200,100], pen='r'))
self.bepx = 50
self.bepy = 1000
x = 1
y = 1
def movecursor(self):
try:
self.cursor.clear()
except:
pass
self.x += 1
if self.x > 50:
self.x = 1
self.y += 1
if self.y > 30:
self.y = 1
self.cursor = self.p1.plot([self.x], [self.y], pen=None,
symbol='+', color = 'b')
def main():
app = QtGui.QApplication(sys.argv)
form = Gui()
form.show()
app.exec_()
if __name__ == '__main__': # if we're running file directly and not
importing it
main() # run the main function
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