Primary Series Color Transparency

[habibalex]

In NT7 I am able to change color transparency of the main data series by changing

'Color for down lines' to 96, 255,192,192
'Color for up lines' to 96, 255,192,192

The first number 96 controls the transparency. How do I perform this same operation in NT8?

[alexr]

I do like this

Brush brushCopy = brush.Clone();
brushCopy.Opacity = opacity / 100.0;
brush = brushCopy;

where the "brush" has a desired color

[habibalex]

Where do you put that code?

[alexr]

NT8 does not use the Color Class but using a Brush Class. Accordingly, transparency is defined in another way.
For example

        private void DrawShape(double price, long sizeIce, long size, float x, MarkerShape marker, float markerSize, float height, int opacity, [B]Brush brush[/B], bool showSummary, SimpleFont font)
        {
            [B]Brush brushCopy = brush.Clone();
            brushCopy.Opacity = opacity / 100.0;
            brush = brushCopy;[/B]
            int yByPrice = chartScale.GetYByValue(price);
            this.PlotShape(false, x, yByPrice, markerSize, height, [B]brush[/B], marker);
            if (showSummary)
            {
                string text = sizeIce.ToString();
                if (font.Equals(this.labelFontSqueeze))
                    text = sizeIce.ToString();
                else
                    text += " " + size.ToString();
                Size sizetext = GetTextSize(text, font, brush);
                float xstr = (float)(x - sizetext.Width - markerSize / 2 - 2);
                RenderTarget.DrawText(text, GetTextFormat(font), new RectangleF(xstr, (float)(yByPrice - sizetext.Height / 2), (float)sizetext.Width, (float)sizetext.Height), [B]brush.ToDxBrush(RenderTarget)[/B], DrawTextOptions.None);
            }
        }

or you have something else in mind?

[habibalex]

I am talking about the primary dataseries of the chart. Like the price candlesticks or line on the chart.

[alexr]

I don't get a picture like you in NT7. I don't know how to use the window settings specify the transparency Programmatically this can be done.

[NinjaTrader_PaulH]

Hello habibalex,

Thanks for your posts.

To extend member alexrs' example and applying it to changing a candle.

if (Close[0] > Open[0])    
{
    Brush mybrush = Brushes.Blue;             // init a new Brush as name = mybrush
    Brush abrushCopy = mybrush.Clone();  // Clone mybrush into abrushCopy
    abrushCopy.Opacity = 30 / 100.0;          // change the opacity of the copy
    mybrush = abrushCopy;                        // copy the clone back the brush
    BarBrush = mybrush;                            // set the color of the Bar
}

You can change the ratio 30/100 to adjust the opacity of the brush.

[habibalex]

Where does this code go? Is it in an a new indicator? This function doesn't appear to be an override of the OnRender. What is DrawShape?

[NinjaTrader_PaulH]

Hello habibalex,

Thanks for your reply.

I'm not sure if you are replying to me or member alexr, but to be clear, the example I provided would be in the OnBarUpdate section and it is an example of changing a candle color when it is an up candle.

[alexr]

What is DrawShape?

I just gave an example of how to implement advanced features change transparency.

[habibalex]

Paul the code you specified below doesn't work properly, it leaves the last bar painted the original color. Only after the bar closes does it revert back to the color I want, the rest of the indicator needs to run at the Bar close. How do I change the color for all the bars without doing it bar by bar?

http://ninjatrader.com/support/forum/showthread.php?t=79554

I want to do something similar to that, but instead set the Opacity to .3. Where do I put the code:

ChartBars.Properties.ChartStyle.DownBrush = Brushes.Transparent;

Hello habibalex,

Thanks for your posts.

To extend member alexrs' example and applying it to changing a candle.

if (Close[0] > Open[0])    
{
    Brush mybrush = Brushes.Blue;             // init a new Brush as name = mybrush
    Brush abrushCopy = mybrush.Clone();  // Clone mybrush into abrushCopy
    abrushCopy.Opacity = 30 / 100.0;          // change the opacity of the copy
    mybrush = abrushCopy;                        // copy the clone back the brush
    BarBrush = mybrush;                            // set the color of the Bar
}

You can change the ratio 30/100 to adjust the opacity of the brush.

[NinjaTrader_PaulH]

Hello habibalex,

Thanks for your reply.

In the OnStateChange():

if (State == State.Configure)
			{
				Brush abrushCopy = ChartBars.Properties.ChartStyle.DownBrush.Clone();
				abrushCopy.Opacity = 30 / 100.0;
				ChartBars.Properties.ChartStyle.DownBrush = abrushCopy;
                                [COLOR="Green"]ChartBars.Properties.ChartStyle.DownBrush.Freeze()[/COLOR]
			}

EDIT: 11/11/15 9:09 mst, Per member Kogman's reminder, added the freeze() method as changing the opacity is creating a custom brush color, please see: http://ninjatrader.com/support/helpGuides/nt8/en-us/?brushes.htm

[koganam]

Hello habibalex,

Thanks for your reply.

In the OnStateChange():

if (State == State.Configure)
			{
				Brush abrushCopy = ChartBars.Properties.ChartStyle.DownBrush.Clone();
				abrushCopy.Opacity = 30 / 100.0;
				ChartBars.Properties.ChartStyle.DownBrush = abrushCopy;
			}

Remember to Freeze() the brush.

ref: http://ninjatrader.com/support/forum...ad.php?t=77304