SendKeys("{LEFT}") don't work from button handler, while other keys work

[fx.practic]

Hello.

I want send keys {LEFT} and {RIGHT} using buttons.

I tried to send these keys from OnBarUpdate() and OnStateChange() - works perfect.

But, doesn't take any effect from buttons handlers (both grid and toollbar).

Other keys I tested - work normally: {PGUP}, {PGDOWN}, even {CAPSLOCK} works fine!


But, {LEFT}, {RIGHT}, {UP}, {DOWN} not work.

I tried ChartControl.Dispatcher.InvokeAsync(), ChartControl.Dispatcher.Invoke(), TriggerCustomEvent() - no effect for arrow keys, while other keys work.

Available keys on MSDN


How to let arrow right work to get scroll effect?

[NinjaTrader_ChelseaB]

Hello fx.practic,

Using SendKeys is not officially supported by NinjaScript Support.

However, this thread will remain open for any community members that would like to assist.

I would recommend taking a look at the RolloverIndications indicator which sends key commands from a button press on the toolbar.
https://ninjatraderecosystem.com/user-app-share-download/rolloverindications-2/

[fx.practic]

Thank You, Chelsea.


RolloverIndications inspired me on chaotic researches and, I get some working code accidentally

                C.Start_Stop_Button.Click += (sender, e) => 
                { 
                    System.Windows.Controls.Button button = sender as System.Windows.Controls.Button;
                    if (button == null) return;                            
                    
                    // its possible for multiple items to have focus each within their own scope
                    // https://stackoverflow.com/questions/2052389/wpf-reset-focus-on-button-click

                    // get the scope of the button
                    //DependencyObject scope = FocusManager.GetFocusScope(rolloverButton); 
                    var Chart_Window = Window.GetWindow(this.ChartControl.Parent) as Chart;
                    DependencyObject scope = FocusManager.GetFocusScope(Chart_Window.MainMenu.LastOrDefault() as System.Windows.DependencyObject ); 
                    
                    // explicitly remove the focus from the button
                    FocusManager.SetFocusedElement(scope, null);
                    // remove keyboard focus
                    Keyboard.ClearFocus();

                    // explicity give the chart focus
                    ChartControl.OwnerChart.Focus();
            
                    Print( "" );    
                    Print( "-------------------" );    
                    for( int i = 0; i <= 20; i++ ) 
                    {
                        Keyboard.FocusedElement.RaiseEvent(new System.Windows.Input.KeyEventArgs( Keyboard.PrimaryDevice, PresentationSource.FromVisual(ChartControl.OwnerChart), 0,  Key.Right)    { RoutedEvent = Keyboard.PreviewKeyDownEvent }  );
                        Print( i );    
                    }
                    Print( "-------------------" );    
                    Print( "" );    
                }; 

UPD: This code work from toolstrip button too.