How to use more than two brushes On Render

[Rosario]

Hello everyone

I would like to use more than two background colors depending on levels of delta.

No problem with just two

protected override void OnRender(ChartControl chartControl, ChartScale chartScale)
{........

if (ShowTotalDelta)
{
SharpDX.Direct2D1.Brush deltaColor;

if (totalDelta > 0)
deltaColor = TotalDelta1Color.ToDxBrush(RenderTarget);
else
deltaColor = TotalDelta2Color.ToDxBrush(RenderTarget);

RenderTarget.FillRectangle(new RectangleF(xBar, (float)(ChartPanel.H - 12), (float)(chartControl.BarWidth * 2), (float)rectangleOffset), deltaColor);

.......}


But if I want four different colors an error "Use of unassigned local variable"deltaColor"" appears


if (totalDelta > 0
&& totalDelta < 75)
{ deltaColor = TotalDelta1Color.ToDxBrush(RenderTarget); }
if (totalDelta >= 75
&& totalDelta < 150)
{ deltaColor = TotalDelta3Color.ToDxBrush(RenderTarget); }

if (totalDelta < 0
&& totalDelta > -75)
{ deltaColor = TotalDelta2Color.ToDxBrush(RenderTarget); }
if (totalDelta <= -75
&& totalDelta > -150)
{ deltaColor = TotalDelta4Color.ToDxBrush(RenderTarget); }

Any idea how can I do this?

Thanks

[NinjaTrader_PaulH]

Hello Rosario,

Thanks for your post.

When do you see the error message? When compiling?

Does the error message point to a specific line in your code?

[Rosario]

Hello Paul

Yes, error is compiling.

Line

RenderTarget.FillRectangle(new RectangleF(xBar, (float)(ChartPanel.H - 12), (float)(chartControl.BarWidth * 2), (float)rectangleOffset), deltaColor);

Sincerely,

Rosario

[NinjaTrader_PaulH]

Hello Rosario,

Thanks for your reply.

I would suggest adding a "default" assignment that will provide a brush color in case your if statements don't provide a brush color.

For example

deltaColor = TotalDelta1Color.ToDxBrush(RenderTarget); // default color

if (totalDelta > 0
&& totalDelta < 75)
{ deltaColor = TotalDelta1Color.ToDxBrush(RenderTarget); }
if (totalDelta >= 75
&& totalDelta < 150)
{ deltaColor = TotalDelta3Color.ToDxBrush(RenderTarget); }

if (totalDelta < 0
&& totalDelta > -75)
{ deltaColor = TotalDelta2Color.ToDxBrush(RenderTarget); }
if (totalDelta <= -75
&& totalDelta > -150)
{ deltaColor = TotalDelta4Color.ToDxBrush(RenderTarget); }

[Rosario]

Hello, Paul

Thanks a lot! It works!