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InkCanvas.SelectionResizing Evento

  • Riferimento

Definizione

Spazio dei nomi:
System.Windows.Controls
Assembly:
PresentationFramework.dll

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 inferiore alla dimensione originale.

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 venga ridimensionata una selezione di tratti e/o elementi, ma prima che venga applicata la modifica.

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

Dopo l'aggiornamento dei tratti e/o degli elementi con le nuove dimensioni, viene generato l'evento SelectionResized .

Si applica a

Vedi anche