Accessing selected manually drawn chart drawing tag

September 26th, 2012, 08:01 AM

I haven't tried his, but it might be that drawing objects are in fact controls. If they are you could do

Code

this.ChartControl.ActiveControl.Tag

to get the active one.
and then sth like

Code

DrawObjects["someTag"].DrawType

to get the type (line or ray or whatever).
If the above works this would come in handy as a possible event handler

Code

this.ChartControl.ActiveControl.GotFocus += new EventHandler(myCoolEventHandler);

All just an idea and untested, but should be easy to find out with a few print statements.

vvhg

September 26th, 2012, 08:16 AM

vvhg

I haven't tried his, but it might be that drawing objects are in fact controls. If they are you could do

Code

this.ChartControl.ActiveControl.Tag

to get the active one.
and then sth like

Code

DrawObjects["someTag"].DrawType

to get the type (line or ray or whatever).
If the above works this would come in handy as a possible event handler

Code

this.ChartControl.ActiveControl.GotFocus += new EventHandler(myCoolEventHandler);

All just an idea and untested, but should be easy to find out with a few print statements.

vvhg

This is all new to me, so could you explain where I would put the code? I think I can figure out the mouse event, but could you post code to print the tag of the selected control, and if no control is selected return? Just so I can figure it out

September 26th, 2012, 09:02 AM

Xav1029

This is all new to me, so could you explain where I would put the code? I think I can figure out the mouse event, but could you post code to print the tag of the selected control, and if no control is selected return? Just so I can figure it out

Was a false alarm, sorry. They are not controls it seems.
I had a look again, but I haven't found a way yet to check an IDrawObjects activation/focuse state.

vvhg

October 6th, 2012, 11:30 PM

Xav1029

@vvhg

Someone sent me the solution to this a couple minutes ago, thought you might want to look at it.

Code

FieldInfo fi = typeof(ChartControl).GetField("selectedObject", BindingFlags.NonPublic | BindingFlags.Instance);
			if (fi != null)
			{
  				if (base.ChartControl != null)
    			        if (fi.GetValue(base.ChartControl) != null)
      			        Print(fi.GetValue(base.ChartControl).ToString());
			}

This will give you something like:
Name='Ray' Time='9/25/2012 4:32:28 PM', StartBar='2995' StartY='91.10' EndTime='9/25/2012 5:00:00 PM' EndBar='3034' EndY='90.99'

So now I just have to add it to a mouse event, and get to coding.

Thank you for posting this. Very helpful. Here's a bit I'm using to access a trendline object when clicked:

Code

using System.Reflection;

Type chartControlType = typeof(ChartControl);
FieldInfo fi = chartControlType.GetField("selectedObject", BindingFlags.NonPublic | BindingFlags.Instance);
if (fi != null)
{
	if (base.ChartControl != null && fi.GetValue(base.ChartControl) != null)
	{
				object clickedObject = fi.GetValue(base.ChartControl);
				if(clickedObject.GetType() == typeof(ChartRay))
				{
					IRay trendLine = (IRay)clickedObject;
	       		Print("Selected a trendline: " +trendLine.Tag);
				}
	}
}

IRay = ChartRay
ILine = ChartLine, etc...

BTW, my first post here. Thank you for running this awesome place.
Jaba

October 7th, 2012, 07:41 AM

Jaba

Thank you for posting this. Very helpful. Here's a bit I'm using to access a trendline object when clicked:

Code

using System.Reflection;

Type chartControlType = typeof(ChartControl);
FieldInfo fi = chartControlType.GetField("selectedObject", BindingFlags.NonPublic | BindingFlags.Instance);
if (fi != null)
{
	if (base.ChartControl != null && fi.GetValue(base.ChartControl) != null)
	{
				object clickedObject = fi.GetValue(base.ChartControl);
				if(clickedObject.GetType() == typeof(ChartRay))
				{
					IRay trendLine = (IRay)clickedObject;
	       		Print("Selected a trendline: " +trendLine.Tag);
				}
	}
}

IRay = ChartRay
ILine = ChartLine, etc...

BTW, my first post here. Thank you for running this awesome place.
Jaba

Thanks for posting that Jaba. I currently have all major code projects on hold while I concentrate on my trading, but this will be my next project. Next step would be adding entry conditions when price approaches the selected TL or S/R Line if you want to keep it going

Accessing selected manually drawn chart drawing tag

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Accessing selected manually drawn chart drawing tag