mouseMoved event on win.addViewBox

[ncu...@seas.upenn.edu]

I am trying to recreate the mouse movement slot from the "Crosshair / Mouse Interaction" example using addViewBox instead of addPlot, but it doesn't seem to be mapping the position -> line correctly.  Has anyone tried this?

Here is the code

```

import numpy as np

import pyqtgraph as pg

from pyqtgraph.Qt import QtGui, QtCore

from pyqtgraph.Point import Point

app = QtGui.QApplication([])

win = pg.GraphicsWindow()

win.setWindowTitle('pyqtgraph example: crosshair')

label = pg.LabelItem('NICK', justify='center')

win.addItem(label)

p1 = win.addViewBox(row=1, col=0)

image = pg.ImageItem(np.random.randn(50,50))

p1.addItem(image)

vLine = pg.InfiniteLine(angle=90, movable=False)

hLine = pg.InfiniteLine(angle=0, movable=False)

p1.addItem(vLine, ignoreBounds=True)

p1.addItem(hLine, ignoreBounds=True)

def mouseMoved(evt):

pos = evt[0]

if p1.sceneBoundingRect().contains(pos):

mousePoint = p1.mapSceneToView(pos)

vLine.setPos(pos.x())

hLine.setPos(pos.y())

proxy = pg.SignalProxy(p1.scene().sigMouseMoved, rateLimit=60, slot=mouseMoved)

```

[ncu...@seas.upenn.edu]

Never mind.. Clearly there is a bug above in my code using 'pos' instead of 'mousePoint' but regardless I got it to work with the following for others to reference:

import numpy as np

import pyqtgraph as pg

from pyqtgraph.Qt import QtGui, QtCore

from pyqtgraph.Point import Point

#app = QtGui.QApplication([])

pg.mkQApp()

win = pg.GraphicsLayoutWidget()

win.show()

win.setWindowTitle('pyqtgraph example: crosshair')

p1 = win.addViewBox(row=1, col=0)

image = pg.ImageItem()

p1.addItem(image)

image.setImage(np.random.randn(100,100))

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

def mouseMoved(evt):

pos = evt[0]

if p1.sceneBoundingRect().contains(pos):

mousePoint = p1.mapSceneToView(pos)

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_()