Convert Ray in Line

[Creamers]

Hi !!

I'm plotting RayLines but on a specific moment the lines should end. (I know the Tag at that moment)
How can I convert this rayline into a line and change it endtime / endbarsago ??

foreach (IDrawObject draw in DrawObjects)
{
if (draw.Tag.StartsWith("line5") && draw is ILine)
{
ILine globalLine = (ILine) draw;

First store the old start to use it later with the line:

globalLine.StartTime

Then convert it to a line and set another endtime:
globalLine.DrawType = DrawType.Line;
globalLine.EndTime;

OR
Remove the drawobject
DrawLine with new values

}
}

Or can I forget the FOREACH and change it directly because I know it's TAG ? Something like:
DrawObjects["someTag"].DrawType = DrawType.Line


Hope someone can help me out or give me tips/examples....

[koganam]

I am almost certain that you cannot do it that way.

Here is how I would suggest that you do it.

1. Find the tag of the ray you want to replace
2. Get its start parameter
3. Delete the Ray
4. Draw a Line with the correct parameters.

[Creamers]

steps

Any ideas how to replace the NOW ?? to a datetime value?
----------------------------
Step one two and three gives me good results, but can't seem to get the DrawLine correct...




foreach (IDrawObject draw in DrawObjects)
{
if (draw.Tag.StartsWith("line5") && draw is ILine)
{
ILine globalLine = (ILine) draw;
DrawLine(CurrentBar.ToString() + "line5", false, globalLine.StartTime , 1230, NOW ?? , 1230, vpcColor, DashStyle.Solid, vpcHeight);
}
}

RemoveDrawObject(vpclist[i].ToString()+"vpc");
vpclist.Remove(vpclist[i]);

Koganam, thx for replying!

[koganam]

Any ideas how to replace the NOW ?? to a datetime value?
----------------------------
Step one two and three gives me good results, but can't seem to get the DrawLine correct...




foreach (IDrawObject draw in DrawObjects)
{
if (draw.Tag.StartsWith("line5") && draw is ILine)
{
ILine globalLine = (ILine) draw;
DrawLine(CurrentBar.ToString() + "line5", false, globalLine.StartTime , 1230, NOW ?? , 1230, vpcColor, DashStyle.Solid, vpcHeight);
}
}

RemoveDrawObject(vpclist[i].ToString()+"vpc");
vpclist.Remove(vpclist[i]);

Koganam, thx for replying!

If you want the line to end on the CurrentBar, as at the time of the drawing, you want that to be Time[0].

To specify this exact time, you want DateTime.Now. That is not what you want in this case, because DateTime.Now does not depend on the chart bar time, it depends on the calendar time as at when you are viewing/refreshing the chart.

[Creamers]

from rayline to line with and end

koganam Thank you very much!!

Two things I did wrong, but don't know why:

DrawLine only worked outside the ForEach
I had to use variables to make Drawline work



One technical question:

Is it possible to simplify this:


foreach (IDrawObject draw in DrawObjects)
{
if (draw.Tag.StartsWith(vpclist[i].ToString()) && draw is ILine)
{
ILine globalLine = (ILine) draw;
begintijd = globalLine.StartTime;
}
}


into one sentence because I already know the Tag ? ( line.Tag("tag").startTime ??)

[koganam]

koganam Thank you very much!!

Two things I did wrong, but don't know why:

DrawLine only worked outside the ForEach
I had to use variables to make Drawline work



One technical question:

Is it possible to simplify this:


foreach (IDrawObject draw in DrawObjects)
{
if (draw.Tag.StartsWith(vpclist[i].ToString()) && draw is ILine)
{
ILine globalLine = (ILine) draw;
begintijd = globalLine.StartTime;
}
}


into one sentence because I already know the Tag ? ( line.Tag("tag").startTime ??)

It looks like you should just be able to write:

begintijd = draw.StartTime;

[Creamers]

shorter

Hi,

Than it would be:

foreach (IDrawObject draw in DrawObjects)
{
if (draw.Tag.StartsWith(vpclist[i].ToString()) && draw is ILine)
{
begintijd = draw.StartTime;
}
}

But do I really have to foreach everything to find a object with a specific tag when i know the tag? Or is it possible to get the StartTime from a specific draw("tag") ?

Anyhow, it works but maybe it's less overhead without foreach,

Thanks for you help

[koganam]

Hi,

Than it would be:

foreach (IDrawObject draw in DrawObjects)
{
if (draw.Tag.StartsWith(vpclist[i].ToString()) && draw is ILine)
{
begintijd = draw.StartTime;
}
}

But do I really have to foreach everything to find a object with a specific tag when i know the tag? Or is it possible to get the StartTime from a specific draw("tag") ?

Anyhow, it works but maybe it's less overhead without foreach,

Thanks for you help

I was kind of wondering why you were doing that search if you already know the tag. So , the answer is to just use the information if you already know it.

[Creamers]

simplify

Hi!

I know the Tag in advance, cause I gave a horizontal rayline in history the tag of a price. I used the price as tag, and as soon price hits this rayline I want to give a new line an ending.
What I don´t know is where this line started in history.!

How can I retreive (without a foreach) this rayline beginTime variable using the rayline Tag ?

So I know the information in advance, but the only thing I don't know in advance is the beginTime of the rayline that I drew in history ....

thanks again!

[koganam]

Hi!

I know the Tag in advance, cause I gave a horizontal rayline in history the tag of a price. I used the price as tag, and as soon price hits this rayline I want to give a new line an ending.
What I don´t know is where this line started in history.!

How can I retreive (without a foreach) this rayline beginTime variable using the rayline Tag ?

So I know the information in advance, but the only thing I don't know in advance is the beginTime of the rayline that I drew in history ....

thanks again!

To retrieve any other parameters, given only the tag would require so many preparatory steps, involving parsing to create unique names; creating structures to hold those matched parameters et.c., that, I think that a foreach search may actually be more efficient