InkCanvas.SelectionChanging Событие

Определение

Пространство имен:
System.Windows.Controls
Сборка:
PresentationFramework.dll

Происходит при выборе нового набора рукописных штрихов и элементов.Occurs when a new set of ink strokes and/or elements is being selected.

public:
 event System::Windows::Controls::InkCanvasSelectionChangingEventHandler ^ SelectionChanging;
public event System.Windows.Controls.InkCanvasSelectionChangingEventHandler SelectionChanging;
member this.SelectionChanging : System.Windows.Controls.InkCanvasSelectionChangingEventHandler 
Public Event SelectionChanging As InkCanvasSelectionChangingEventHandler

Примеры

В следующем примере выбранные штрихи Royal синим цветом.The following example makes selected strokes royal blue.

void inkCanvas1_SelectionChanging(object sender, InkCanvasSelectionChangingEventArgs e)
{
    StrokeCollection selectedStrokes = e.GetSelectedStrokes();
    
    foreach (Stroke aStroke in inkCanvas1.Strokes)
    {
        if (selectedStrokes.Contains(aStroke))
        {
            aStroke.DrawingAttributes.Color = Colors.RoyalBlue;
        }
        else
        {
            aStroke.DrawingAttributes.Color = inkCanvas1.DefaultDrawingAttributes.Color;
        }

    }
}

Private Sub inkCanvas1_SelectionChanging(ByVal sender As Object, _
                                 ByVal e As InkCanvasSelectionChangingEventArgs)

    Dim selectedStrokes As StrokeCollection = e.GetSelectedStrokes()

    Dim aStroke As Stroke
    For Each aStroke In inkCanvas1.Strokes
        If selectedStrokes.Contains(aStroke) Then
            aStroke.DrawingAttributes.Color = Colors.RoyalBlue
        Else
            aStroke.DrawingAttributes.Color = inkCanvas1.DefaultDrawingAttributes.Color
        End If
    Next aStroke

End Sub

Комментарии

SelectionChanging Событие возникает, когда пользователь выбирает штрихи и (или) элементы, но до применения изменения.The SelectionChanging event is raised when strokes and/or elements are selected by the user - but before the change is applied.

Событие обрабатывается, InkCanvasSelectionChangingEventHandler когда получает InkCanvasSelectionChangingEventArgs объект. SelectionChangingThe SelectionChanging event is processed when the InkCanvasSelectionChangingEventHandler receives an InkCanvasSelectionChangingEventArgs object. InkCanvasSelectionChangingEventArgsпредоставляет методы для доступа FrameworkElement к StrokeCollection объектам и после их выбора пользователем.InkCanvasSelectionChangingEventArgs provides methods for accessing FrameworkElement and StrokeCollection objects after they are selected by the user.

После применения SelectionChanged изменения возникает событие.After the change is applied, the SelectionChanged event is raised.

Примечание

Событие не происходит при удалении выбранных штрихов или ActiveEditingMode при изменении свойства. SelectionChangingThe SelectionChanging event does not occur when the selected strokes are deleted or when the ActiveEditingMode property changes.

Применяется к

Дополнительно