scroll wheel zoom Qt5

[tjtr33]

hello, the mouse wheel crashes the app.
So, in nodz_main.py,
i changed 'event.delta() > 0' to 'event.angleDelta() > 0' ,

    # tjp 02nov  qt5 has angleDelta and pixel Delta if event.delta() > 0:
#  angleDelta always increased despite wheel dir
#  same for pixelDelta
if event.angleDelta() > 0:
        zoomFactor = inFactor
    else:
        zoomFactor = outFactor

I never gto scrollwheel zoom to work
but added KEY_PLUS and KEY_MINUS to do same

    if event.key() == QtCore.Qt.Key_Plus:
    zoomFactor = inFactor
        self.scale(zoomFactor, zoomFactor)
        self.currentState = 'DEFAULT'

    if event.key() == QtCore.Qt.Key_Minus:
    zoomFactor = outFactor
        self.scale(zoomFactor, zoomFactor)
        self.currentState = 'DEFAULT'

Also enabled the scroll bars to all paning hopriz & vert

    #self.setHorizontalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
self.setHorizontalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOn)
    #self.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
self.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOn)

Then changed the transparency to allow nets to show through nodes
( circumventing coding to avoid other nodes )

// Custom colors > Add and remove as you want.
// Don't forget to edit the end of the dictionary if editing the
// following part.
// 03nov2021 was  "bg": [80, 80, 80, 255],
"node_preset_1": {
    "bg": [80, 80, 80, 127],
    "border": [50, 50, 50, 255],
    "border_sel": [170, 80, 80, 255],
    "text": [230, 230, 230, 255]
},
// 03nov2021 was "bg": [60, 60, 60, 255],
"attr_preset_1": {
    "bg": [60, 60, 60, 127],
    "text": [220, 220, 220, 255],
    "plug": [255, 155, 0, 255],
    "socket": [255, 155, 0, 255]
},

and added arrays of nodes

as in:

------------------mult2------------------------------

mult2 = []
mult2.append( nodz.createNode(name='mult2[0]', preset='node_preset_1', position=None) )
nodz.createAttribute(node=mult2[0], name='in0', index=-1, preset='attr_preset_1', plug=False, socket=True, dataType=float)
nodz.createAttribute(node=mult2[0], name='out', index=-1, preset='attr_preset_1', plug=True, socket=False, dataType=float)
nodz.createAttribute(node=mult2[0], name='in1', index=-1, preset='attr_preset_1', plug=False, socket=True, dataType=float)

------------------end mult2[0]------------------------------

------------------mult2[1]-----------------------------

mult2.append( nodz.createNode(name='mult2[1]', preset='node_preset_1', position=None) )
....

thanks for a nice tool!
I need to make a library of widgets
and drag/drop from a palette
and make visible names for the nets/signals/wires
and allow custome widths

My application is to visulaize the Hal component files of the LinuxCNC project.
thanks TomP 21:06 03nov2021 Thailand