hiding text by button

[md236]

Hi,
is it possible to hide any text element in the chart via button? I need it to toggle between the pure chart without my comments and with it. I think it's possible to change the color but this isn't professional and hide any other elements...

Thanks
Mario

[NinjaTrader_Jim]

Hello Mario,

Thanks for opening the thread.

NinjaScripts can only modify a chart's drawing objects that have been made from that NinjaScript. So this would be possible to do if you have the indicator that writes your notes create a button that would change the text brush of your Text DrawingTool objects. There is not a simple method to call that would hide and show text, changing the color would be the most direct way of doing this.

myText.TextBrush = Brushes.Transparent;

Here is a link to some samples written by our colleague Chelsea that demonstrate how to create your own buttons on a chart: http://ninjatrader.com/support/forum...327#post499327

Please let me know if I may be of further assistance.

[md236]

Hi Jim,

thanks for the information but the link you provided is for NT8 only.
My code, so far, react to an button and I can isolate the Text objects, but sometimes it works and then not, don't know why. The text object seems to be a copy of the original because if I use a different color as transparent, then it results in two text objects.
I tried to implement a try-catch but I got the error that "a local variable e can't declared here". What's wrong here?

	
		private void ButtonClick(object s, EventArgs e) {
			int i =0;
			try{
				if(isVisible){
					foreach (IDrawObject draw in ChartControl.ChartObjects)
					{
						if(draw.DrawType == DrawType.Text){
							i++;						
							IText txt = (IText)draw;  
							Print("Tag: " +draw.Tag+" Text: "+ txt.Text); 
							DrawText(draw.Tag,txt.Text,txt.BarsAgo,txt.Y,Color.Transparent);
                                                        // change Color of the button
							flagGraphics.FillRectangle(Brushes.LightBlue, 0, 0, 30, 30);
						}
					}				
				}else{
					foreach (IDrawObject draw in ChartControl.ChartObjects)
					{
						if(draw.DrawType == DrawType.Text){
							IText txt = (IText)draw;  
							DrawText(draw.Tag,txt.Text,txt.BarsAgo,txt.Y,Color.White);
							flagGraphics.FillRectangle(Brushes.Red, 0, 0, 30, 30);
						}
					}				
				}
			}
			catch(Exception e){
				Print("error: " +e.ToString());
			}
			finally{
				Print("text objects found: " + i);
				isVisible= !isVisible;
				ChartControl.Refresh();
			}
		}

Mario

[NinjaTrader_Jim]

Hello Mario,

Thanks for pointing that out. It looks like I misread the forum name. Oops!

The text object seems to be a copy of the original because if I use a different color as transparent, then it results in two text objects.

I see that you are looping through each drawing object in the chart. Each of these drawing objects will have to be made by the NinjaScript where you have the button to change the text color if you would like that NinjaScript to change them. NinjaScripts cannot modify drawing objects that they do not own.

I would recommend to use IText objects to organize each of your DrawText()'s in this indicator and to change the IText.TextColor instead of looping through all of the chart's draw objects and recalling DrawText(). This way the expected behavior would be clear and observable, and you wouldn't risk creating a new draw object for one created outside this NinjaScript.

I tried to implement a try-catch but I got the error that "a local variable e can't declared here". What's wrong here?

It looks like you are already using the variable 'e' for the ButtonClick() method. You would need to use a different variable for the try/catch Exception.

Here are some NinjaTrader 7 relevant resources for the thread's reference.

IText - https://ninjatrader.com/support/help.../nt7/itext.htm

DrawText() - https://ninjatrader.com/support/help...m?drawtext.htm

NinjaTrader 7 button sample - http://ninjatrader.com/support/forum...php?linkid=490

Please let me know if I may be of further assistance.

[md236]

Hi Jim,

good observation with the double "e" variable
I just removed the DrawText... and used the way you showed via IText to change Color and it works now

Thank you
Mario