StrokeCollection.HitTest Método

public:
 System::Windows::Ink::StrokeCollection ^ HitTest(System::Windows::Rect bounds, int percentageWithinBounds);

public System.Windows.Ink.StrokeCollection HitTest(System.Windows.Rect bounds, int percentageWithinBounds);

member this.HitTest : System.Windows.Rect * int -> System.Windows.Ink.StrokeCollection

Public Function HitTest (bounds As Rect, percentageWithinBounds As Integer) As StrokeCollection

Parâmetros

Devoluções

A StrokeCollection que tem traços com pelo menos a percentagem especificada dentro do Rect.

Exemplos

O exemplo seguinte apaga os traços que estejam pelo menos 50% dentro dos limites do Rect. Este exemplo assume que existe um InkPresenter chamado presenter.

Rect rect = new Rect(100, 100, 200, 200);
StrokeCollection strokes = presenter.Strokes.HitTest(rect, 50);

presenter.Strokes.Remove(strokes);

Dim rect As Rect = New Rect(100, 100, 200, 200)
Dim strokes As StrokeCollection = presenter.Strokes.HitTest(rect, 50)

presenter.Strokes.Remove(strokes)

public:
 System::Windows::Ink::StrokeCollection ^ HitTest(System::Windows::Point point, double diameter);

public System.Windows.Ink.StrokeCollection HitTest(System.Windows.Point point, double diameter);

member this.HitTest : System.Windows.Point * double -> System.Windows.Ink.StrokeCollection

Public Function HitTest (point As Point, diameter As Double) As StrokeCollection

Parâmetros

Devoluções

Uma coleção de Stroke objetos que intersectam o ponto especificado.

Exemplos

O exemplo seguinte demonstra como obter os traços que intersectam o especificado Point. Este exemplo assume que existe um InkPresenter chamado presenter.

// Change the color of all the strokes at the specified position.
public void SelectStrokes(Point position)
{
    StrokeCollection selected = presenter.Strokes.HitTest(position, 5);

    foreach (Stroke s in selected)
    {
        s.DrawingAttributes.Color = Colors.Purple;
    }
}

' Change the color of all the strokes at the specified position.
Public Sub SelectStrokes(ByVal position As Point)

    Dim selected As StrokeCollection = presenter.Strokes.HitTest(position, 5)

    Dim s As Stroke
    For Each s In selected
        s.DrawingAttributes.Color = Colors.Purple
    Next s

End Sub

public:
 System::Windows::Ink::StrokeCollection ^ HitTest(System::Collections::Generic::IEnumerable<System::Windows::Point> ^ path, System::Windows::Ink::StylusShape ^ stylusShape);

public System.Windows.Ink.StrokeCollection HitTest(System.Collections.Generic.IEnumerable<System.Windows.Point> path, System.Windows.Ink.StylusShape stylusShape);

member this.HitTest : seq<System.Windows.Point> * System.Windows.Ink.StylusShape -> System.Windows.Ink.StrokeCollection

Public Function HitTest (path As IEnumerable(Of Point), stylusShape As StylusShape) As StrokeCollection

Parâmetros

Devoluções

A StrokeCollection de traços que intersectam com path.

Exemplos

O exemplo seguinte altera a cor de todos os traços que intersectam o caminho criado pelo Point array. Este exemplo assume que existe um InkPresenter chamado presenter.

private void HitTestWithEraser(Point[] points)
{
    RectangleStylusShape eraser = new RectangleStylusShape(3, 3, 0);

    StrokeCollection strokes = presenter.Strokes.HitTest(points, eraser);

    foreach (Stroke s in strokes)
    {
        s.DrawingAttributes.Color = Colors.Purple;
    }
}

Private Sub HitTestWithEraser(ByVal points() As Point)
    Dim eraser As RectangleStylusShape = New RectangleStylusShape(3, 3, 0)

    Dim strokes As StrokeCollection = presenter.Strokes.HitTest(points, eraser)

    Dim s As Stroke
    For Each s In strokes
        s.DrawingAttributes.Color = Colors.Purple
    Next
End Sub

public:
 System::Windows::Ink::StrokeCollection ^ HitTest(System::Collections::Generic::IEnumerable<System::Windows::Point> ^ lassoPoints, int percentageWithinLasso);

public System.Windows.Ink.StrokeCollection HitTest(System.Collections.Generic.IEnumerable<System.Windows.Point> lassoPoints, int percentageWithinLasso);

member this.HitTest : seq<System.Windows.Point> * int -> System.Windows.Ink.StrokeCollection

Public Function HitTest (lassoPoints As IEnumerable(Of Point), percentageWithinLasso As Integer) As StrokeCollection

Parâmetros

Devoluções

A StrokeCollection que tem traços com pelo menos a percentagem especificada dentro do Point array.

Exceções

Exemplos

O exemplo seguinte demonstra como remover todos os traços que estejam pelo menos 80 por cento dentro do laço especificado de um StrokeCollection. Isto é útil quando um controlo personalizado permite ao utilizador selecionar tinta com um laço. Para criar um controlo que permita ao utilizador selecionar tinta com um laço, veja Como: Selecionar Tinta a partir de um Controlo Personalizado.

// Remove the strokes within the lasso from the InkPresenter
public void RemoveStrokes(Point[] lasso)
{
    StrokeCollection strokes = presenter.Strokes.HitTest(lasso, 80);

    presenter.Strokes.Remove(strokes);
}

' Remove the strokes within the lasso from the InkPresenter
Public Sub RemoveStrokes(ByVal lasso As Point())

    If lasso Is Nothing Then
        Return
    End If

    Dim strokes As StrokeCollection = _
        presenter.Strokes.HitTest(lasso, 80)

    presenter.Strokes.Remove(strokes)

End Sub

public:
 System::Windows::Ink::StrokeCollection ^ HitTest(System::Windows::Point point);

public System.Windows.Ink.StrokeCollection HitTest(System.Windows.Point point);

member this.HitTest : System.Windows.Point -> System.Windows.Ink.StrokeCollection

Public Function HitTest (point As Point) As StrokeCollection

Parâmetros

Devoluções

Uma coleção de Stroke objetos que intersectam o ponto especificado.

Exemplos

O exemplo seguinte demonstra como obter os traços que intersectam o especificado Point. Este exemplo assume que existe um InkPresenter chamado presenter.

// Change the color of all the strokes at the specified position.
public void SelectStrokes(Point position)
{
    StrokeCollection selected = presenter.Strokes.HitTest(position, 5);

    foreach (Stroke s in selected)
    {
        s.DrawingAttributes.Color = Colors.Purple;
    }
}

' Change the color of all the strokes at the specified position.
Public Sub SelectStrokes(ByVal position As Point)

    Dim selected As StrokeCollection = presenter.Strokes.HitTest(position, 5)

    Dim s As Stroke
    For Each s In selected
        s.DrawingAttributes.Color = Colors.Purple
    Next s

End Sub