Fixed Scale Button

[mk77ch]

Dear NinjaTrader Support Team,

i am working on an indicator which should be able to switch between Fixed and Automatic ChartScale.
This works fine by setting the following ChartScale Properties:

ChartScale.Properties.YAxisRangeType = YAxisRangeType.Fixed || YAxisRangeType.Automatic
ChartScale.Properties.FixedScaleMax = <double>
ChartScale.Properties.FixedScaleMin = <double>

The only problem i have, is that the Fixed Scale "F" Button does not respond to programmatically changes to these ChartScale Properties.
I've used Inspect to see if this button has an automationId, but the first parent element with an automationId is the actual TabControl (ChartWindowTabControl).
From there i would need to find my way down to the actual "F" button and try to set the visibility.

I know that this is pretty much outside of any supported Scope but could you please give me a hint what i would need to do to toggle the "F" button?
The only thing that worked until now is to use SendKeys.SendWait("{F5}") which reloads the whole chart and isn't an actual option for me.

Is there anything else i could try to trigger the method which toggles the button?
I wouldn't ask if this wasn't a pretty important feature in order for the indicator to be useful.

Thank you very much and Best Regards,
Mike

[NinjaTrader_ChelseaB]

Hello Mike,

This would not be supported by NinjaTrader. The FixedScale is read-only.

"Warning: These are UI properties which are designed to be set by a user. Attempting to modify these values through a custom script is NOT guaranteed to take effect. "

https://ninjatrader.com/support/helpGuides/nt8/chartscale_properties.htm

A workaround is to remove all chart objects from the auto scaling, and allow one indicator to set the min/max in OnCalculateMinMax().

https://ninjatrader.com/support/forum/forum/ninjatrader-8/indicator-development/1157155-fix-y-axis?p=1157233#post1157233

I am not aware of any way to toggle the "F" button in code.

[mk77ch]

Hey NinjaTrader_ChelseaB,

thank you for the clarification.
As for the workaround, are you talking about these ChartObjects?

https://ninjatrader.com/ru/support/helpGuides/nt8/?chartobjects.htm

So i had to loop over all of them and set the AutoScale to false in order to make this work or what would be the actual effect of the workaround?

Thank you,
Mike

[NinjaTrader_ChelseaB]

Hello Mike,

By all chart objects, I am referring to manually disabling the Auto Scale for all data series in the Data Series window, all Indicators in the Indicators window (except for the one indicator that will be controlling the max/min), all drawing objects in the Drawing Objects window.

By leaving one indicator with Auto Scale on, this indicator will have control of the scale by setting the max/min.

[mk77ch]

Hello NinjaTrader_ChelseaB,

thank you for your answer.
As this is an indicator which is used by many people, i guess it would kind of be a problem to just change all these chart object properties.
I thought that there is an event or method which toggles the "Fixed Scale" button, as its visibility is set when a user fires the mouse drag event on the chart scale and also when a user changes the YAxisRangeType in the properties window. I had some hope that i could somehow trigger this visibility check with a propertiesChanged event or use a hook by changing some properties who would then trigger the visibility check.

The functionality of the indicator works as expected but it currently breaks the UI because of the Fixed Scale button.

Thank you,
Mike

[mk77ch]

NTWindow ntWindow = (NTWindow)Window.GetWindow(ChartControl.Parent);
System.Windows.Controls.TabControl tabControl = ntWindow.FindFirst("ChartWindowTabControl") as System.Windows.Controls.TabControl;

foreach(System.Windows.Controls.TabItem tabItem in tabControl.Items)
{
    ChartControl tabChartControl = (tabItem.Content as ChartTab).ChartControl;

    if(tabItem.IsSelected)
    {
        if(ScaleJustification == ScaleJustification.Left)
        {
            try
            {
                System.Windows.Controls.Button fixedScaleButton = tabChartControl.Children.OfType<System.Windows.Controls.Button>().Where(b => b.Content.ToString() == "F").First();

                fixedScaleButton.Visibility = (ChartScale.Properties.YAxisRangeType == YAxisRangeType.Fixed) ? Visibility.Visible : Visibility.Hidden;
            }
            catch(Exception e) {}
        }
        if(ScaleJustification == ScaleJustification.Right)
        {
            try
            {
                System.Windows.Controls.Button fixedScaleButton = tabChartControl.Children.OfType<System.Windows.Controls.Button>().Where(b => b.Content.ToString() == "F").Last();

                fixedScaleButton.Visibility = (ChartScale.Properties.YAxisRangeType == YAxisRangeType.Fixed) ? Visibility.Visible : Visibility.Hidden;
            }
            catch(Exception e) {}
        }
    }
}​