Is there a way to read the y-axis value when the mouse is hovered over finplot?

[big100]

Thank you for making such a great program.

Is there a way to read the y-axis value when the mouse is hovered over finplot? (ex : 540)
I'm trying to get the value and proceed with a buy/sell with a hotkey.

[highfestiva]

Sure.

def on_hover(x, y):
    print('hovering', x, y)

fplt.set_time_inspector(on_hover, ax=ax, when='hover')

[big100]

Thanks for the reply.
But there is a problem.

finplot_init_.py", line 1747, in set_time_inspector
win.proxy_hover = pg.SignalProxy(win.scene().sigMouseMoved, rateLimit=15, slot=partial(_inspect_pos, ax, inspector))
AttributeError: 'NoneType' object has no attribute 'sigMouseMoved'

I have a problem when I try to use it by putting it in qt.
Is it possible to solve it?

Below is an example.

import sys 
from PyQt5.QtWidgets import *
import finplot as fplt
import pyupbit


def on_hover(x, y):
    print('hovering', x, y)

class MyWindow(QMainWindow):
    def __init__(self):
        super().__init__()

        widget= QGraphicsView()
        layout = QGridLayout(widget)
        self.setCentralWidget(widget)
        self.resize(800, 300)

        ax = fplt.create_plot_widget(widget, init_zoom_periods=100)           
        axo = ax.overlay()                                      
        widget.axs = [ax]                                       
        layout.addWidget(ax.ax_widget, 0, 0)                    

        df = pyupbit.get_ohlcv("KRW-BTC")
        df.rename(columns={'open': "Open", "high": "High", "low": "Low", "close":"Close"}, inplace=True)
        
        fplt.candlestick_ochl(df[['Open', 'Close', 'High', 'Low']])
        fplt.set_time_inspector(on_hover, ax=ax, when='hover')
        fplt.show(qt_exec=False)
if __name__ == "__main__":
    app = QApplication(sys.argv)
    window = MyWindow()
    window.show()
    app.exec_()
    

[highfestiva]

Since you're using your own window, you'll have to implement your own hover functionality.

[big100]

Thanks, this solved it.

def set_time_inspector(inspector, ax=None, when='click'):
     '''Callback when clicked like so: inspector(x, y).'''
     ax = ax if ax else last_ax
     win = ax.ax_widget
     # win = ax.vb.win
     if when == 'hover':
         win.proxy_hover = pg.SignalProxy(win.scene().sigMouseMoved, rateLimit=15, slot=partial(_inspect_pos, ax, inspector))
     elif when in ('dclick', 'double-click'):
         win.proxy_dclick = pg.SignalProxy(win.scene().sigMouseClicked, slot=partial(_inspect_clicked, ax, inspector, True))
     else:
         win.proxy_click = pg.SignalProxy(win.scene().sigMouseClicked, slot=partial(_inspect_clicked, ax, inspector, False))

win = ax.vb.win => win = ax.ax_widget

Just changing it like this solved it.

[highfestiva]

Interesting! I had no idea it was possible to get ahold of a "scene"! I'll incorporate it in finplot asap. Thanks!