GraphicsPath vs. NT's Plot?

[sledge]

I'm dealing with some strange code, using GraphicsPath to draw a line on a chart.

http://www.c-sharpcorner.com/uploadfile/mahesh/understanding-and-using-graphics-paths-in-gdi/

It's basically drawing a line like an NT Plot based on data points in a series.

So I'm either dealing with super old legacy code ported to NT6.5/7, or someone who is .net/C# expert but has no idea about NT code, or an obfuscation expert.

Is there any background I should know about with NT2/3/4/5??

Is GraphicsPath more efficient than NT's Plot?

[koganam]

I'm dealing with some strange code, using GraphicsPath to draw a line on a chart.

http://www.c-sharpcorner.com/uploadfile/mahesh/understanding-and-using-graphics-paths-in-gdi/

It's basically drawing a line like an NT Plot based on data points in a series.

So I'm either dealing with super old legacy code ported to NT6.5/7, or someone who is .net/C# expert but has no idea about NT code, or an obfuscation expert.

Is there any background I should know about with NT2/3/4/5??

Is GraphicsPath more efficient than NT's Plot?

Depends. Sometimes when using a Custom Plot, the best way to draw is to use the base C# methods. Many times, as to use a GraphicsPath, all you need is a collection of points and one instruction, it can be the most efficient way to draw.

[sledge]

Depends. Sometimes when using a Custom Plot, the best way to draw is to use the base C# methods. Many times, as to use a GraphicsPath, all you need is a collection of points and one instruction, it can be the most efficient way to draw.

In order to hack this up and try the simplest solution that I know to get this work -
I've duplicated the original dataseries with a Plot class and set my Plot class with the values in order to try to make a NT Plot.


So the NT Plot is overriden and of course NT Plot code is called.

        public override void Plot(Graphics graphics, Rectangle bounds, double min, double max)

So I give it the ole:

			base.Plot(graphics,bounds,min,max);

Nothing happens.

The price markers are showing in the right hand column and in the databox.. I just don't have an NT plot.

I have added a factor of 10.00 to make sure the line isn't being affected by Z-order.

What am I missing besides years of experience in this .net world?

[sledge]

I would guess call to the base.Plot is working, just not producing the desired effect by making a plot, because I'm not stuck in an infinite loop calling the overriden plot

[koganam]

In order to hack this up and try the simplest solution that I know to get this work -
I've duplicated the original dataseries with a Plot class and set my Plot class with the values in order to try to make a NT Plot.


So the NT Plot is overriden and of course NT Plot code is called.

        public override void Plot(Graphics graphics, Rectangle bounds, double min, double max)

So I give it the ole:

            base.Plot(graphics,bounds,min,max);

Nothing happens.

The price markers are showing in the right hand column and in the databox.. I just don't have an NT plot.

I have added a factor of 10.00 to make sure the line isn't being affected by Z-order.

What am I missing besides years of experience in this .net world?

Hard to say without seeing some code, but base.Plot(...) should draw any Plot class objects. Do you have any errors in the log?

[Harry]

I do not think that it is necessary to replace the NinjaTrader plots, but I use GraphicsPath for calculating polygones and to fill the area between plots. For example the chart below has all areas filled via GraphicsPath, while the seven plots are just drawn via base.Plot(graphics, bounds, min, max).

I do not like to use DrawRegion() because it is too slow (complex indicators may take as much as 30-60 seconds to show on a chart with a longer lookback period). Furthermore some of the shaded regions disappear and reappear when you scroll back your chart hoirzontally.

[NinjaTrader_CalH]

Sledge,

Thank you for your post and to Harry and Koganam for responding.

This kind of programming is unsupported however, you may want to try looking at the Mountain Chart Style from the Miscellaneous Section -
http://www.ninjatrader.com/support/f...atid=6&lpage=1

The reason for this is because it does something very similar to what you are looking for.

Let me know if I can be of further assistance.