InkCanvasSelectionHitResult 列舉
重要
部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。
識別 InkCanvas 上的選取裝飾項的各部分。
public enum class InkCanvasSelectionHitResultC#
public enum InkCanvasSelectionHitResulttype InkCanvasSelectionHitResult = Public Enum InkCanvasSelectionHitResult- 繼承
| Bottom | 6 | 選取裝飾項的正下方控點。 |
| BottomLeft | 7 | 選取裝飾項的左下方控點。 |
| BottomRight | 5 | 選取裝飾項的右下方控點。 |
| Left | 8 | 選取裝飾項左邊緣的中間控點。 |
| None | 0 | 沒有任何選取裝飾項部分。 |
| Right | 4 | 選取裝飾項右邊緣的中間控點。 |
| Selection | 9 | 選取裝飾項邊界內的區域。 |
| Top | 2 | 選取裝飾項的正上方控點。 |
| TopLeft | 1 | 選取裝飾項的左上方控點。 |
| TopRight | 3 | 選取裝飾項的右上方控點。 |
下列範例示範如何使用 HitTestSelection 來判斷是否要建立 DataObject 來起始拖放。 若要在兩個 InkCanvas 物件之間實作拖放，請參閱 如何：拖放筆跡。
C#
void InkCanvas_PreviewMouseDown(object sender, MouseEventArgs e)
{
InkCanvas ic = (InkCanvas)sender;
Point pt = e.GetPosition(ic);
// If the user is moving selected strokes, prepare the strokes to be
// moved to another InkCanvas.
if (ic.HitTestSelection(pt) ==
InkCanvasSelectionHitResult.Selection)
{
StrokeCollection selectedStrokes = ic.GetSelectedStrokes();
StrokeCollection strokesToMove = selectedStrokes.Clone();
// Remove the offset of the selected strokes so they
// are positioned when the strokes are dropped.
Rect inkBounds = strokesToMove.GetBounds();
TranslateStrokes(strokesToMove, -inkBounds.X, -inkBounds.Y);
// Perform drag and drop.
MemoryStream ms = new MemoryStream();
strokesToMove.Save(ms);
DataObject dataObject = new DataObject(
StrokeCollection.InkSerializedFormat, ms);
DragDropEffects effects =
DragDrop.DoDragDrop(ic, dataObject,
DragDropEffects.Move);
if ((effects & DragDropEffects.Move) ==
DragDropEffects.Move)
{
// Remove the selected strokes
// from the current InkCanvas.
ic.Strokes.Remove(selectedStrokes);
}
}
}
Private Sub InkCanvas_PreviewMouseDown(ByVal sender As Object, _
ByVal e As MouseButtonEventArgs)
Dim ic As InkCanvas = CType(sender, InkCanvas)
Dim pt As Point = e.GetPosition(ic)
' If the user is moving selected strokes, prepare the strokes to be
' moved to another InkCanvas.
If ic.HitTestSelection(pt) = InkCanvasSelectionHitResult.Selection Then
Dim selectedStrokes As StrokeCollection = _
ic.GetSelectedStrokes()
Dim strokesToMove As StrokeCollection = _
selectedStrokes.Clone()
' Remove the offset of the selected strokes so they
' are positioned when the strokes are dropped.
Dim inkBounds As Rect = strokesToMove.GetBounds()
TranslateStrokes(strokesToMove, -inkBounds.X, -inkBounds.Y)
' Perform drag and drop.
Dim ms As New MemoryStream()
strokesToMove.Save(ms)
Dim dataObject As New DataObject _
(StrokeCollection.InkSerializedFormat, ms)
Dim effects As DragDropEffects = _
DragDrop.DoDragDrop(ic, dataObject, DragDropEffects.Move)
If (effects And DragDropEffects.Move) = DragDropEffects.Move Then
' Remove the selected strokes from the current InkCanvas.
ic.Strokes.Remove(selectedStrokes)
End If
End If
End Sub
方法會 HitTestSelection 傳 InkCanvasSelectionHitResult 回 ，指出選取裝飾項的哪個部分與 交集或圍繞 。 Point 執行拖放作業時，這非常有用。
這個類別通常不會用於 XAML。
| 產品 | 版本 |
|---|---|
| .NET Framework | 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 |
| Windows Desktop | 3.0, 3.1, 5, 6, 7 |