Zoom stuck when using DockArea to display multiples chart with different timeframe

[laixuanthoi]

Hi.
I created 4 Dock to display 4 different timeframes: 1minute, 5minute, 1hour, 1day by following 'dockable.py' example.
Error occured when i couldn't zoom-in 1minute chart maybe 1d chart is reaching max zoom point.
Any idea to fix this.

Here is my code

asyncio.run(load_historical_ticks())
for timeframe in TimeFrames:
    bars = build_bars_from_ticks(TickDf, timeframe, price_column='bid')
    Bars[timeframe] = bars

def update():
    ax0.reset() # remove previous plots
    ax1.reset() # remove previous plots
    ax2.reset() # remove previous plots
    ax3.reset() # remove previous p

    ohlc0 = fplt.candlestick_ochl(Bars[TimeFrames[0]]["open close high low".split()], ax = ax0)
    ohlc1 = fplt.candlestick_ochl(Bars[TimeFrames[1]]["open close high low".split()], ax = ax1)
    ohlc2 = fplt.candlestick_ochl(Bars[TimeFrames[2]]["open close high low".split()], ax = ax2)
    ohlc3 = fplt.candlestick_ochl(Bars[TimeFrames[3]]["open close high low".split()], ax = ax3)

    ohlc0.resamp = None
    ohlc1.resamp = None
    ohlc2.resamp = None
    ohlc3.resamp = None

    fplt.refresh() # refresh autoscaling when all plots complete

# create app
app = QApplication([])
# app.setStyle('Windows')

win = QMainWindow()
area = DockArea()
win.setCentralWidget(area)
win.resize(1600,800)
win.setWindowTitle(f"{Symbol} Replay Chart")
win.setStyleSheet("QSplitter { width : 10px; height : 10px; }")

# Create docks
dock_0 = Dock(f"{TimeFrames[0]}", size = (1000, 100), closable = False)
dock_1 = Dock(f"{TimeFrames[1]}", size = (1000, 100), closable = False)
dock_2 = Dock(f"{TimeFrames[2]}", size = (1000, 100), closable = False)
dock_3 = Dock(f"{TimeFrames[3]}", size = (1000, 100), closable = False)

area.addDock(dock_0)
area.addDock(dock_1, 'right', dock_0)
area.addDock(dock_2)
area.addDock(dock_3, 'right', dock_2)

#creat axis
ax0,ax1,ax2,ax3 = fplt.create_plot_widget(master=area, rows=4, init_zoom_periods=100)
# ax0,ax1,ax2,ax3 = fplt.create_plot('', rows=4, init_zoom_periods=100)

area.axs = [ax0, ax1, ax2, ax3]
dock_0.addWidget(ax0.ax_widget, 1, 0, 1, 1)
dock_1.addWidget(ax1.ax_widget, 1, 0, 1, 1)
dock_2.addWidget(ax2.ax_widget, 1, 0, 1, 1)
dock_3.addWidget(ax3.ax_widget, 1, 0, 1, 1)

# Link x-axis
ax1.setXLink(ax0)
ax2.setXLink(ax0)
ax3.setXLink(ax0)
win.axs = [ax0,ax1,ax2,ax3]

update()

fplt.show(qt_exec = False)
win.show()
app.exec()

[highfestiva]

I guess you could try fplt.max_zoom_points = 1 (or possibly even 0, if that doesn't crash). That setting regulates how far you can zoom, default is 20 (so 20 days in your case). GL!