Retrieve Data from Screen (or Drawing Objects box)

[jamestrades]

Hi,

I am creating a strategy that needs to access drawing objects I have manual drawn on a chart. We can assume those drawing objects are rectangles for this example. I would like to only to only print the name of the rectangle that starts before the current bar and ends after the current bar. I can't seem to figure out how to do this. So far I can loop through all of the objects something like below but I would like to ignore all the rectangles that came before.


if (DrawObjects.Count > 0) {

foreach (DrawingTool draw in DrawObjects.ToList())

{

if (draw is DrawingTools.Rectangle)

{

Print ("Tag name: "+draw.Tag);

Any help to get me going in the right direction would be appreciated.

Thanks!

[NinjaTrader_BrandonH]

Hello jamestrades,

Thanks for writing in.

Detecting information from manually drawn objects on a chart could be accomplished by looping through the DrawObjects collection and checking if draw.IsUserDrawn in the script.

Please see the third section of sample code on this help guide page demonstrating detecting manually drawn objects on a chart.

DrawObjects: https://ninjatrader.com/support/help...ub=drawobjects

And, see this help guide page about what values could be accessed from a draw object: https://ninjatrader.com/support/help...rawingtool.htm

[trendisyourfriend]

I suppose you mean how to access its coordinates to compare them to the current bar time, you might try this to read a rectangle coordinates:

foreach ( DrawingTool draw in DrawObjects.ToList() )
{
    if ( draw is DrawingTools.Rectangle )
    {
        if ( draw.IsUserDrawn )
        {
            // create a variable to hold a ref to the rectangle object beeing processed
            DrawingTools.Rectangle myRect = draw as DrawingTools.Rectangle;
            // apply a filter
            if ( myRect.Tag.Trim('@').StartsWith("abc") == true) {
                //---------------
                string aLine = "";

                aLine += myRect.StartAnchor.Time.ToString("yyyy-MM-dd HH:mm:ss") + "\t";
                aLine += myRect.StartAnchor.Price.ToString("G", CultureInfo.InvariantCulture) + "\t";
                aLine += myRect.EndAnchor.Time.ToString("yyyy-MM-dd HH:mm:ss") + "\t";
                aLine += myRect.EndAnchor.Price.ToString("G", CultureInfo.InvariantCulture);
                Print( aLine );
            }
        }
    } //end if ( draw is ...            
} //end foreach​