InkOverlay.HitTestSelection 方法

傳回值，這個值表示在點擊測試期間有被點擊的選取範圍部分。

命名空間：  Microsoft.Ink
組件：  Microsoft.Ink (在 Microsoft.Ink.dll 中)

語法

'宣告
Public Function HitTestSelection ( _
    X As Integer, _
    Y As Integer _
) As SelectionHitResult
'用途
Dim instance As InkOverlay
Dim X As Integer
Dim Y As Integer
Dim returnValue As SelectionHitResult

returnValue = instance.HitTestSelection(X, _
    Y)

public SelectionHitResult HitTestSelection(
    int X,
    int Y
)

public:
SelectionHitResult HitTestSelection(
    int X, 
    int Y
)

public SelectionHitResult HitTestSelection(
    int X,
    int Y
)

public function HitTestSelection(
    X : int, 
    Y : int
) : SelectionHitResult

參數

• X
  型別：System.Int32
  點擊測試的 X 位置 (以像素為單位)。

• Y
  型別：System.Int32
  點擊測試的 Y 位置 (以像素為單位)。

傳回值

型別：Microsoft.Ink.SelectionHitResult
SelectionHitResult 列舉型別的成員，會指定在點擊測試期間選取範圍 (如果有的話) 的哪個部分已被點擊。

備註

這個方法只有在 InkOverlay.EditingMode 屬性是設定為 Select 時才會有用。

注意事項：
如果是在 Windows XP 桌上型電腦 (設定值為 120dpi) 上執行筆墨應用程式，則當提供的點從筆墨空間轉換為像素空間時，縮放比例就會關閉 HitTestSelection 方法。

範例

在這個範例中，當 MouseDown 事件引發時，會檢查 EditingMode 是否設定為 Select。如果是，則會呼叫 HitTestSelection 方法，以判斷選取範圍 (如果有的話) 的哪個部分已被點擊。如果點擊發生於指南針四個主要方向的其中一個，如 SelectionHitResult 列舉型別所指定，已選取的筆劃物件會變更為不同色彩。

Private Sub mInkObject_MouseDown(ByVal sender As Object, ByVal e As CancelMouseEventArgs)

    If InkOverlayEditingMode.Select = mInkObject.EditingMode Then
        Select Case mInkObject.HitTestSelection(e.X, e.Y)
            Case SelectionHitResult.North
                ChangeSelectionColor(Color.Green)
            Case SelectionHitResult.East
                ChangeSelectionColor(Color.Red)
            Case SelectionHitResult.South
                ChangeSelectionColor(Color.Purple)
            Case SelectionHitResult.West
                ChangeSelectionColor(Color.Blue)
        End Select
    End If
End Sub

Private Sub ChangeSelectionColor(ByVal color As Color)
    Dim DA As DrawingAttributes = mInkObject.DefaultDrawingAttributes.Clone()
    DA.Color = color
    mInkObject.Selection.ModifyDrawingAttributes(DA)
    Using G As Graphics = CreateGraphics()
        ' Get the bounding box of the selection. The default is
        ' to include the width of the strokes in the calculation.
        ' The returned rectangle is measured in ink units.
        Dim rInkUnits As Rectangle = mInkObject.Selection.GetBoundingBox()

        ' In selection mode, the selected strokes are drawn inflated
        ' GetBoundingBox() does not take this into account
        ' Rectangle rInkUnits is inflated to compensate
        rInkUnits.Inflate(53, 53)

        Dim topLeft As Point = rInkUnits.Location
        Dim bottomRight As Point = rInkUnits.Location + rInkUnits.Size

        ' get a Renderer object to make the conversion
        Dim R As Renderer = New Renderer()

        ' convert the points to pixels
        R.InkSpaceToPixel(G, topLeft)
        R.InkSpaceToPixel(G, bottomRight)

        ' create a rectangle that is in pixels
        Dim rPixelUnits As Rectangle = _
            New Rectangle(topLeft, New Size(bottomRight.X - topLeft.X, bottomRight.Y - topLeft.Y))

        ' Redraw the strokes
        mInkObject.Draw(rPixelUnits)

    End Using
End Sub

private void mInkObject_MouseDown(object sender, CancelMouseEventArgs e)
{
    if (InkOverlayEditingMode.Select == mInkObject.EditingMode)
    {
        switch (mInkObject.HitTestSelection(e.X, e.Y))
        {
            case SelectionHitResult.North:
                ChangeSelectionColor(Color.Green);
                break;
            case SelectionHitResult.East:
                ChangeSelectionColor(Color.Red);
                break;
            case SelectionHitResult.South:
                ChangeSelectionColor(Color.Purple);
                break;
            case SelectionHitResult.West:
                ChangeSelectionColor(Color.Blue);
                break;
        }
    }
}

private void ChangeSelectionColor(Color color)
{
    DrawingAttributes DA = mInkObject.DefaultDrawingAttributes.Clone();
    DA.Color = color;
    mInkObject.Selection.ModifyDrawingAttributes(DA);
    using (Graphics G = CreateGraphics())
    {
        // Get the bounding box of the selection. The default is
        // to include the width of the strokes in the calculation.
        // The returned rectangle is measured in ink units.
        Rectangle rInkUnits = mInkObject.Selection.GetBoundingBox();

        // In selection mode, the selected strokes are drawn inflated
        // GetBoundingBox() does not take this into account
        // Rectangle rInkUnits is inflated to compensate
        rInkUnits.Inflate(53, 53);

        Point topLeft = rInkUnits.Location;
        Point bottomRight = rInkUnits.Location + rInkUnits.Size;

        // get a Renderer object to make the conversion
        Renderer R = new Renderer();

        // convert the points to pixels
        R.InkSpaceToPixel(G, ref topLeft);
        R.InkSpaceToPixel(G, ref bottomRight);

        // create a rectangle that is in pixels
        Rectangle rPixelUnits =
            new Rectangle(topLeft, new Size(bottomRight.X - topLeft.X, bottomRight.Y - topLeft.Y));

        // Redraw the strokes
        mInkObject.Draw(rPixelUnits);

    } 
}

平台

Windows Vista

.NET Framework 和 .NET Compact Framework 並不支援各種平台的所有版本。如需支援平台版本的相關資訊，請參閱 .NET Framework 系統需求。

版本資訊

.NET Framework

支援版本：3.0

請參閱

參考

InkOverlay 類別

InkOverlay 成員

Microsoft.Ink 命名空間

SelectionHitResult