Freigeben über

CoreInputView.XYFocusTransferringFromPrimaryView Ereignis

  • Referenz

Definition

Namespace:
Windows.UI.ViewManagement.Core
Bearbeiten

Tritt auf, bevor der Eingabebereich den Fokus verliert und bevor ein UI-Element den Fokus erhält.

// Register
event_token XYFocusTransferringFromPrimaryView(TypedEventHandler<CoreInputView, CoreInputViewTransferringXYFocusEventArgs const&> const& handler) const;

// Revoke with event_token
void XYFocusTransferringFromPrimaryView(event_token const* cookie) const;

// Revoke with event_revoker
CoreInputView::XYFocusTransferringFromPrimaryView_revoker XYFocusTransferringFromPrimaryView(auto_revoke_t, TypedEventHandler<CoreInputView, CoreInputViewTransferringXYFocusEventArgs const&> const& handler) const;
public event TypedEventHandler<CoreInputView,CoreInputViewTransferringXYFocusEventArgs> XYFocusTransferringFromPrimaryView;
function onXYFocusTransferringFromPrimaryView(eventArgs) { /* Your code */ }
coreInputView.addEventListener("xyfocustransferringfromprimaryview", onXYFocusTransferringFromPrimaryView);
coreInputView.removeEventListener("xyfocustransferringfromprimaryview", onXYFocusTransferringFromPrimaryView);
- or -
coreInputView.onxyfocustransferringfromprimaryview = onXYFocusTransferringFromPrimaryView;
Public Custom Event XYFocusTransferringFromPrimaryView As TypedEventHandler(Of CoreInputView, CoreInputViewTransferringXYFocusEventArgs)

Ereignistyp

TypedEventHandler<CoreInputView,CoreInputViewTransferringXYFocusEventArgs>

Windows-Anforderungen

Gerätefamilie
Windows 10, version 1803 (eingeführt in 10.0.17134.0)
API contract
Windows.Foundation.UniversalApiContract (eingeführt in v6.0)

Beispiele

Hier zeigen wir, wie sie das XYFocusTransferringFromPrimaryView-Ereignis behandeln und ermitteln, welches UI-Element den Fokus in der Anwendung erhalten soll. Die Fokuskandidaten werden basierend auf der Position relativ zum umgebenden Rechteck des letzten untergeordneten Eingabebereichselements unterschieden.

private void OnXYFocusTransferringFromPrimaryView(CoreInputView sender,
CoreInputViewTransferringXYFocusEventArgs args)
{
    bool acceptXYFocusTransfer = false;

    switch (args.Direction)
    {
        case CoreInputViewXYFocusTransferDirection.Down:
            // If focus navigation is moving down,
            // set focus to the top element (usernameTextBox).
            this.usernameTextBox.Focus(FocusState.Programmatic);
            acceptXYFocusTransfer = true;
            break;

        case CoreInputViewXYFocusTransferDirection.Up:
            // If focus navigation is moving up,
            // there are two focus candidates.
            // Check the Origin rect to determine the more
            // suitable candidate.
            if ((args.Origin.X + (args.Origin.Width / 2.0)) <
            Window.Current.Bounds.Width / 2.0)
            {
            this.cancelButton.Focus(FocusState.Programmatic);
            }
            else
            {
            this.submitButton.Focus(FocusState.Programmatic);
            }
            acceptXYFocusTransfer = true;
            break;

        case CoreInputViewXYFocusTransferDirection.Left:
        case CoreInputViewXYFocusTransferDirection.Right:
            // If focus navigation is moving left or right,
            // maintain focus on the currently focused UI element.
            acceptXYFocusTransfer = true;
            break;

        default:
            // Don't accept XY focus movement.
            break;
    }

    if (acceptXYFocusTransfer)
    {
        args.TransferHandled = true;
        this.KeyDown += OnMainPageKeyDown;
    }
}

Hinweise

Die primäre Ansicht bezieht sich auf eine der Ansichten CoreInputViewKind.Keyboard oder CoreInputViewKind.Handwriting , während CoreInputView beliebige Werte aus CoreInputViewKind sein kann.

Legen Sie das Fokusziel fest, wenn Sie vom Eingabebereich zu einem Ui-Element in Ihrer Anwendung navigieren.

Gilt für:

Weitere Informationen