Sample code to drag and drop a line on a chart after a bot draws it?

PanagiotisCharalampous
01 Feb 2021, 14:25

Hi firemyst,

Just set the IsInteractive property of the object to true.

Best Regards,

Panagiotis 

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firemyst
01 Feb 2021, 16:08

RE:

PanagiotisCharalampous said:

Hi firemyst,

Just set the IsInteractive property of the object to true.

Best Regards,

Panagiotis 

Join us on Telegram

 

Thank you @Panagiotis!

And how do I capture the events when dragging and dropping the line? I didn't see any examples in the API Guides nor the API documentation itself:

or here:

Thank you.

PanagiotisCharalampous
02 Feb 2021, 08:43

Hi firemyst,

Check Chart.Drag and Chart.ObjectsUpdated events.

Best Regards,

Panagiotis 

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firemyst
24 May 2021, 16:58

RE:

PanagiotisCharalampous said:

Hi firemyst,

Check Chart.Drag and Chart.ObjectsUpdated events.

Best Regards,

Panagiotis 

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Thanks for that.

Another question. I have the following sample code -- see my question in the commented code:

using System;
using System.Collections.Generic;
using cAlgo.API;
using cAlgo.API.Indicators;

namespace cAlgo.Indicators
{
    [Indicator(IsOverlay = true, AccessRights = AccessRights.None)]
    public class Test : Indicator
    {
        private ChartHorizontalLine _chl;
        private double _value;

        protected override void Initialize()
        {
            _value = MarketData.GetBars(Chart.TimeFrame, Symbol.Name).ClosePrices.LastValue;
            _chl = Chart.DrawHorizontalLine("test line", _value, Color.Goldenrod, 2, LineStyle.Solid);
            _chl.IsInteractive = true;

            Chart.ObjectsUpdated += LineUpdated;
        }

        public override void Calculate(int index)
        {
        }

        //When I drag the horizontal line created on the chart, why does this method get called numerous times?
        //Every time I drag the line, if I set a breakpoint on the opening curly brace, this method gets hit for each
        //object on the chart.
        //Is there a way to to reduce this so it only gets called for horizontal line objects?
        private void LineUpdated(ChartObjectsUpdatedEventArgs args)
        {   
            ChartHorizontalLine obj = (ChartHorizontalLine)args.Chart.FindObject("test line");
            if (obj != null && obj.Y != _value)
            {
                _value = obj.Y;
                Chart.DrawStaticText("value", _value.ToString(), VerticalAlignment.Top, HorizontalAlignment.Right, Color.Goldenrod);
            }
        }

    }
}

PanagiotisCharalampous
25 May 2021, 07:57

Hi firemyst,

This method is triggered every time any object is updated. You cannot change this behavior. You need to check for the object type inside the event handler before operating on the relevant object.

Best Regards,

Panagiotis 

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