How to display X, Y position on mouse hover?

[Ankit Kakkar]

Hi,

How can we get the real-time X, Y position on mouse hover on m PlotWidget?

I have attached a screenshot of the functionality (anything similar) i want. 

[Luke Campagnola]

Hi Ankit,

Have a look at examples/crosshair.py; that should help.

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[Ankit Kakkar]

Hi Luke,

Thanks for the suggestion. This seems good.

However, on line 65 of the crosshair example, it says:

vb = p1.vb

This line doesn't seems to work for me. As in my case, p1 refers to PlotWidget, which does not have any attribute as vb. Could you please elaborate on what does it mean?

If it refers to ViewBox(), then do I need to add another viewbox inside my plotwidget ?

On Wednesday, May 2, 2018 at 7:30:17 PM UTC+5:30, Luke Campagnola wrote:

Hi Ankit,

Have a look at examples/crosshair.py; that should help.

On Tue, May 1, 2018 at 10:20 PM, Ankit Kakkar <ankit....@gmail.com> wrote:

Hi,

How can we get the real-time X, Y position on mouse hover on m PlotWidget?

I have attached a screenshot of the functionality (anything similar) i want. 

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[Ankit Kakkar]

Error message for your reference:

Traceback (most recent call last):


  File "R:/New Structure/West 70/Single Stock Analyzer/Drafts/Ankit/Scanner V3 - 3 May/Scanner V3.5.py", line 1234, in plot
    vb = w2.vb


  File "C:\ProgramData\Anaconda2\lib\site-packages\pyqtgraph\widgets\PlotWidget.py", line 79, in __getattr__
    raise NameError(attr)


NameError: vb

[Luke Campagnola]

There are three containers here: PlotWidget (the Qt widget) contains a PlotItem (the Qt graphics item), which contains two AxisItems and a ViewBox.
So to get the ViewBox from the PlotWidget, it's `plotwidget.plotItem.vb`.

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[Ankit Kakkar]

Got it, thanks. I actually got it from your post on Stack overflow. Thanks Luke.