Trader Control - How to reset my code when user clicks on the Chart Tabs

[jmneto]

Hi,

I have added a WFP control to the Chart Trader grid using the code below as a start point

grChartTraderGrid = (Window.GetWindow(ChartControl.Parent).FindFirst(" ChartWindowChartTraderControl") as ChartTrader).Content as System.Windows.Controls.Grid;


technique is also partially demonstrated here: https://ninjatrader.com/support/help...tTraderControl

The Problem I am facing is when the user clicks on the Chart Tabs to change to a different instrument.

How do I subscribe to a event so when the User changes the chart using the tabs in the bottom of the chart window I can reset my code for the new selected Chart/Instrument?

[NinjaTrader_Jesse]

Hello jmneto,

Thank you for the question.

I have attached a modified version of the following sample that includes InvokeAsync: https://ninjatrader.com/support/foru...7&postcount=21

The event is the SelectionChanged event on the charts MainTabControl object.

Chart chartWindow = Window.GetWindow(ChartControl.Parent) as Chart;
chartWindow.MainTabControl.SelectionChanged += MySelectionChangedHandler;

I look forward to being of further assistance.

[jmneto]

Thank you this information allowed me to move forward.

[jmneto]

Hi,
In your sample, event handler MySelectionChangedHandler. What is the best way to figure which TAB we are moving from and which one we are going to? Like a tab index or similar?

[NinjaTrader_Jesse]

Hello jmneto,

That would likely depend on the intended use, what is the need to know the tab, to change the contents of the item or just to hide the item?

The sample simply shows hiding the button based on the selection. In the sample it specifically checks:

temp.ChartControl == ChartControl

Or the tab selected against the indicators ChartControl where it is applied. This would be checking one instance against another which should work to know if the tab is the indicators tab or not.

If you are trying to do something more complex, you can use the other objects from that temp variable to compare against the Indicator variables such as

 temp.Instrument

I look forward to being of further assistance.

[jmneto]

Hi Jesse,
Thx again, but I figure out using :

System.Windows.Controls.TabControl tc = sender as TabControl;
if (tc == null) return;

Print("Clicked on:" + tc.SelectedIndex)

[jmneto]

Hi Jesse, I ran into another need.

Let's say I have 5 Tabs with 5 same instruments loaded

for example in

else if (State == State.DataLoaded)
{

if I run the code below I can get the tabItem in Item opposition [0]

TabItem tabItem = chartWindow.MainTabControl.Items[0] as TabItem;
if (tabItem == null) return;

ChartTab temp = tabItem.Content as ChartTab;
if (temp == null) return;

How can I get the current tabItem

For the current chart tab


I would need something like this


TabItem tabItem = chartWindow.MainTabControl.Items[CurrentTabIndex] as TabItem;


I tried chartWindow.MainTabControl.SelectedIndex; but it does not work since at first time NT loads, for all loaded chart tabs it returns the value of the current selected tab and not the tab where the chart/instrument is loaded.

[NinjaTrader_Jesse]

Hello jmneto,

You can access the selected tab the same way you do in the event handler, the tabs content needs to be cast to a ChartControl which can then be compared. The TabManager has a SelectedItem property which will produce the TabItem:

TabItem t = chartWindow.MainTabControl.SelectedItem as TabItem;
ChartTab temp = t.Content as ChartTab;

The remainder of the check to see if ChartControl is equal would be the same as the event handler, you could do this check right after the button was created if necessary.

I look forward to being of further assistance.

[jmneto]

Thx, I am all set now.