I am very sorry for the noise!!! I fix it myself!
The important part was:
plot_wg.proxy = proxy
Very simple...
Below is the function, which should work for any PlotWidget:
def cross_hair(self, plot_wg, log=False ):
global fit
################### TETS cross hair ############3
vLine = pg.InfiniteLine(angle=90, movable=False)#, pos=0)
hLine = pg.InfiniteLine(angle=0, movable=False)#, pos=2450000)
plot_wg.addItem(vLine, ignoreBounds=True)
plot_wg.addItem(hLine, ignoreBounds=True)
vb = plot_wg.getViewBox()
label = pg.TextItem()
plot_wg.addItem(label)
def mouseMoved(evt):
pos = evt[0] ## using signal proxy turns original arguments into a tuple
if plot_wg.sceneBoundingRect().contains(pos):
mousePoint = vb.mapSceneToView(pos)
if log == True:
label.setText("x=%0.3f, y1=%0.3f"%(10**mousePoint.x(), mousePoint.y()))
else:
label.setText("x=%0.3f, y1=%0.3f"%(mousePoint.x(), mousePoint.y()))
vLine.setPos(mousePoint.x())
hLine.setPos(mousePoint.y())
#print(mousePoint.x(),mousePoint.y())
plot_wg.getViewBox().setAutoVisible(y=True)
proxy = pg.SignalProxy(plot_wg.scene().sigMouseMoved, rateLimit=60, slot=
mouseMoved)
plot_wg.proxy = proxy
################### TETS cross hair ############3
On Thursday, May 9, 2019 at 11:35:50 AM UTC+2, Trifon Trifonov wrote:
>
> I am trying to make a cross hair on my pyqtgraph interactive plots, which
> are embedded in a PyQt5 GUI thanks to the designer-qt5. I found a working
> code in the pyqtgraph "examples". A simplified WORKING example is posted
> below. Now I want the same, but the problem seems to be that I promoted a
> QGraphicsView() to a pg.PlotWidget in the designer, instead of
> pg.GraphicsWindow()? The Code does not work for me because my p1 is
> "pyqtgraph.widgets.PlotWidget.PlotWidget object" while in the example p1 is
> "pyqtgraph.graphicsItems.PlotItem.PlotItem.PlotItem object".
>
>
> So what should I do to make this example work for me?
>
>
>
>> import numpy as np
>> import pyqtgraph as pg
>> from pyqtgraph.Qt import QtGui, QtCore
>> from pyqtgraph.Point import Point
>>
>> pg.setConfigOption('background', '#ffffff')
>> pg.setConfigOption('foreground', 'k')
>> pg.setConfigOptions(antialias=True)
>>
>> app = QtGui.QApplication([])
>> win = pg.GraphicsWindow()
>> win.setWindowTitle('pyqtgraph example: crosshair')
>> label = pg.LabelItem(justify='right')
>> win.addItem(label)
>> p1 = win.addPlot(row=1, col=0)
>>
>> p1.setAutoVisible(y=True)
>>
>> #create numpy arrays
>> #make the numbers large to show that the xrange shows data from 10000 to all
>> the way 0
>> data1 = 10000 + 15000 * pg.gaussianFilter(np.random.random(size=10000), 10)
>> + 3000 * np.random.random(size=10000)
>>
>> p1.plot(data1, pen="r")
>>
>> #cross hair
>> vLine = pg.InfiniteLine(angle=90, movable=False)
>> hLine = pg.InfiniteLine(angle=0, movable=False)
>> p1.addItem(vLine, ignoreBounds=True)
>> p1.addItem(hLine, ignoreBounds=True)
>>
>> vb = p1.vb
>>
>> print(p1)
>> print(vb)
>>
>> def mouseMoved(evt):
>> pos = evt[0] ## using signal proxy turns original arguments into a tuple
>> if p1.sceneBoundingRect().contains(pos):
>> mousePoint = vb.mapSceneToView(pos)
>> index = int(mousePoint.x())
>> if index > 0 and index < len(data1):
>> label.setText("<span style='font-size: 12pt'>x=%0.1f, <span
>> style='color: green'>y2=%0.1f</span>" % (mousePoint.x(), data1[index]))
>> vLine.setPos(mousePoint.x())
>> hLine.setPos(mousePoint.y())
>>
>> proxy = pg.SignalProxy(p1.scene().sigMouseMoved, rateLimit=60,
>> slot=mouseMoved)
>> #p1.scene().sigMouseMoved.connect(mouseMoved)
>>
>> ## Start Qt event loop unless running in interactive mode or using pyside.
>> if __name__ == '__main__':
>> import sys
>> if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_VERSION'):
>> QtGui.QApplication.instance().exec_()
>>
>>
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