InkCanvas.SelectionResizing Evento

Definizione

Si verifica prima che i tratti e gli elementi selezionati vengano ridimensionati.

public:
 event System::Windows::Controls::InkCanvasSelectionEditingEventHandler ^ SelectionResizing;
public event System.Windows.Controls.InkCanvasSelectionEditingEventHandler SelectionResizing;
member this.SelectionResizing : System.Windows.Controls.InkCanvasSelectionEditingEventHandler 
Public Custom Event SelectionResizing As InkCanvasSelectionEditingEventHandler 
Public Event SelectionResizing As InkCanvasSelectionEditingEventHandler 

Tipo evento

InkCanvasSelectionEditingEventHandler

Esempio

L'esempio seguente impedisce all'utente di effettuare una selezione più piccola delle dimensioni originali.

Rect selectionBounds;

// Don't allow the user to make the selection smaller than its original size.
void inkCanvas1_SelectionResizing(object sender, InkCanvasSelectionEditingEventArgs e)
{
    if (selectionBounds == null || selectionBounds.IsEmpty)
    {
        return;
    }

    double resizeHeight;
    double resizeWidth;

    // If the user made the height of the selection smaller, 
    // use the selection's original height.
    if (e.NewRectangle.Height < selectionBounds.Height)
    {
        resizeHeight = selectionBounds.Height;
    }
    else
    {
        resizeHeight = e.NewRectangle.Height;
    }

    // If the user made the width of the selection smaller, 
    // use the selection's original width.
    if (e.NewRectangle.Width < selectionBounds.Width)
    {
        resizeWidth = selectionBounds.Width;
    }
    else
    {
        resizeWidth = e.NewRectangle.Width;
    }

    // Create a the new rectangle with the appropriate width and height.
    e.NewRectangle = new Rect(e.NewRectangle.X, e.NewRectangle.Y, resizeWidth, resizeHeight);
}

// Keep track of the selection bounds.
void inkCanvas1_SelectionChanged(object sender, EventArgs e)
{
    selectionBounds = inkCanvas1.GetSelectionBounds();
}
Private selectionBounds As Rect

' Don't allow the user to make the selection smaller than its original size.
Private Sub inkCanvas1_SelectionResizing(ByVal sender As Object, ByVal e As InkCanvasSelectionEditingEventArgs)

    If selectionBounds.IsEmpty Then
        Return
    End If

    Dim resizeHeight As Double
    Dim resizeWidth As Double

    ' If the user made the height of the selection smaller, 
    ' use the selection's original height.
    If e.NewRectangle.Height < selectionBounds.Height Then
        resizeHeight = selectionBounds.Height
    Else
        resizeHeight = e.NewRectangle.Height
    End If

    ' If the user made the width of the selection smaller, 
    ' use the selection's original width.
    If e.NewRectangle.Width < selectionBounds.Width Then
        resizeWidth = selectionBounds.Width
    Else
        resizeWidth = e.NewRectangle.Width
    End If

    ' Create a the new rectangle with the appropriate width and height.
    e.NewRectangle = New Rect(e.NewRectangle.X, e.NewRectangle.Y, resizeWidth, resizeHeight)

End Sub


' Keep track of the selection bounds.
Private Sub inkCanvas1_SelectionChanged(ByVal sender As Object, ByVal e As EventArgs)

    selectionBounds = inkCanvas1.GetSelectionBounds()

End Sub

Commenti

Questo evento si verifica dopo che l'utente richiede che una selezione di tratti e/o elementi venga ridimensionata, ma prima dell'applicazione della modifica.

Il gestore eventi riceve un argomento di tipo InkCanvasSelectionEditingEventArgs che contiene due proprietà: e OldRectangle NewRectangle . OldRectangle definisce i limiti della selezione prima dell'operazione di ridimensionamento e definisce i limiti della selezione dopo NewRectangle l'operazione di ridimensionamento.

Dopo che i tratti e/o gli elementi sono stati aggiornati con le nuove dimensioni, viene SelectionResized generato l'evento .

Si applica a

Vedi anche