Indicator will be deleted when manually deleting objects drawn by it

[oracle]

Hi,

I have an indicator which draws rectangles periodically on the chart. When a programmatically-drawn rectangle is selected to be deleted using the mouse, a dialog box pops up asking whether I wanted the indicator/strategy that draws the boxes to be deleted as well. I said no. However, this does not seem to have any effect, when I have actually expected the selected programmatically-drawn rectangle to have been deleted.

When I choose "yes", the indicator + all the rectangles drawn will be deleted.

In 6.5, I could choose to delete any items drawn by an indicator without having to delete the whole indicator and everything that goes with it.

Is there a way to configure in NT7 or is this a bug?

Thanks.

[NinjaTrader_Ray]

This is expected. I see that the message box text should be improved and will look at that.

In short

By default, there is a new property named "AllowRemovalOfDrawObjects" and this is set to false. When false, draw objects created by a script can be deleted but it will deleted the entire indicator. If you set "AllowRemovalOfDrawObjects" to true, you can then remove any objects created by a script without it removing the entire indicator.

[oracle]

Thanks!

[oracle]

Hi,

Though the "AllowRemovalOfDrawObjects" enable the deletion of the draw objects independently of the indicator that drew it, I faced another issue.

After my indicator has drawn some rectangles each with a unique tag, I closed down NT7 and saved the workspace. When I opened up NT7, the drawn rectangles are not there anymore.

This will also happen when I go to the "Indicators..." dialog box. When I exit from the box, the drawn rectangles are all deleted.

The indicator I created is very straight-forward. It is some kind of utility to help me with my trading rather than a real indicator, I might have "abused" the framework to create this utility.

Strip to its bare essentials:

 
protected override void OnBarUpdate()
{
  IRectangle meBox=null;
  if (somecondition) {
    meBox = DrawRectangle(mebox"+someid, true, someStartTime, someStartY, someEndTime, someEndY, Color.Azure, Color.Brown, 2);
    meBox.Locked=true;
  }
}

[NinjaTrader_Ray]

Is the condition still true for drawing when reloading etc..?

Can you reproduce with just one DrawRectangle() call in OnBarUpdate() ?

[oracle]

Is the condition still true for drawing when reloading etc..?

Can you reproduce with just one DrawRectangle() call in OnBarUpdate() ?

The following code draws a rectangle. After that, I change the tag to "mebox1000", recompile, and then perform a "reload ninjascript". The previous rectangle drawn with tag "mebox99" is erased when I would expect it not to be.

My NT7 is connected to IB.

 
protected override void OnBarUpdate()
{
  if (!drawn) {
     DrawRectangle("mebox99", true, new DateTime(2010,4,20),1.3290, new DateTime(2010,4,23), 1.3330, Color.Azure, Color.Brown, 2);
    drawn=true;
  }
}

[NinjaTrader_Ray]

The following code draws a rectangle. After that, I change the tag to "mebox1000", recompile, and then perform a "reload ninjascript". The previous rectangle drawn with tag "mebox99" is erased when I would expect it not to be.

My NT7 is connected to IB.

 
protected override void OnBarUpdate()
{
  if (!drawn) {
     DrawRectangle("mebox99", true, new DateTime(2010,4,20),1.3290, new DateTime(2010,4,23), 1.3330, Color.Azure, Color.Brown, 2);
    drawn=true;
  }
}

It would be expected that "mebox99" would be removed and "mebox100" is drawn.

[oracle]

Hi Ray,

Thanks!

Is there any way to "manually" force programmatically drawn rectangles (or other objects) like in my example, to become "user-drawn", so that they could remain on the chart, even on "reload ninjascript"? Thanks.

[NinjaTrader_Ray]

I don't believe so however, I will double check with development and report back if I am incorrect.