B11. Porting NT7 code using Color to NT8 code using Brushes

[rayko]

Hello Support

I am trying to convert an indicator from NT7 to NT8 and I'm having trouble resolving this piece of code so that it will work with NT8.

When I use "BarBrushes[0] = Color.FromArgb(alpha, BarBrushes[0]);" in NT8, I get Error: There is argument given that corresponds to the required formal parameter 'g' of 'Color.FromArgb(byte, byte, byte, byte)

In NT7 the syntax was public static Color FromArgb(int alpha, Color baseColor). I've been googling for over an hour and I can't find an equivalent method for Brushes.

I need to apply an alpha to the bar brush color to show its an Up bar with close > open.

Since NT8 uses Brushes and not Color, I don't know how to use Color.FromArgb with Brushes.

Can you please help me with converting this line of code below in BOLD to NT8 ?

Thank you


NT7 Code:
private Color downColor = Color.Salmon;

if(Close[0] > Open[0])
BarColor = Color.FromArgb(alpha, BarColor);
else
BarColor = downColor;


NT8 Code:
private Brush downColor = Brushes.Salmon;

if (Close[0] > Open[0])
BarColor = ?????
else
BarBrushes[0] = downColor;

[NinjaTrader_Jesse]

Hello,

Thank you for the question.

Because you know NT8 uses Brushes and not colors, that can help form your search on google. To locate items for WPF like how to make a brush from ARGB, you would need to search google for something like "How to make a brush from ARGB C#".

that would result in this page which the second reply is the answer: http://stackoverflow.com/questions/1...rom-a-rgb-code

var brush = new SolidColorBrush(Color.FromArgb(255, (byte)R, (byte)G, (byte)B));

You could just substitute the "var brush" for the variable in your script or if you are looking for the equivalent to BarColor it is now BarBrush.

BarBrush = new SolidColorBrush(Color.FromArgb(255, 125,30,56));

http://ninjatrader.com/support/helpGuides/nt8/en-us/barbrush.htm?zoom_highlightsub=barbrush

Basically most items that were "Color" would now be replaced with "Brush", BarColor is now BarBrush.

This change can be found on the code breaking changes page: http://ninjatrader.com/support/helpG...ng_changes.htm
If you search for "BarColor" it shows the new syntax for NT8 next to it.


I look forward to being of further assistance.

[rayko]

Hello Jesse,

Thanks for the help. I used a variant of SolidColorBrush

byte g = ((Color)BarBrushes[0].GetValue(SolidColorBrush.ColorProperty)).G;
byte r = ((Color)BarBrushes[0].GetValue(SolidColorBrush.ColorProperty)).R;
byte b = ((Color)BarBrushes[0].GetValue(SolidColorBrush.ColorProperty)).B;

BarBrushes[0] = new SolidColorBrush(Color.FromArgb((byte)alpha, r, g, b));