TransformPattern.Rotate(Double) 方法
定義
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。
旋轉控制項。
public:
void Rotate(double degrees);
public void Rotate (double degrees);
member this.Rotate : double -> unit
Public Sub Rotate (degrees As Double)
參數
- degrees
- Double
項目的旋轉度數。 正數會順時針旋轉,負數會逆時針旋轉。
例外狀況
CanRotate 屬性為 false。
範例
在下列範例中, TransformPattern 會從 AutomationElement 取得控制項模式,並接著用來旋轉 AutomationElement 。
///--------------------------------------------------------------------
/// <summary>
/// Obtains a TransformPattern control pattern from
/// an automation element.
/// </summary>
/// <param name="targetControl">
/// The automation element of interest.
/// </param>
/// <returns>
/// A TransformPattern object.
/// </returns>
///--------------------------------------------------------------------
private TransformPattern GetTransformPattern(
AutomationElement targetControl)
{
TransformPattern transformPattern = null;
try
{
transformPattern =
targetControl.GetCurrentPattern(TransformPattern.Pattern)
as TransformPattern;
}
catch (InvalidOperationException)
{
// object doesn't support the TransformPattern control pattern
return null;
}
return transformPattern;
}
'''--------------------------------------------------------------------
''' <summary>
''' Obtains a TransformPattern control pattern from
''' an automation element.
''' </summary>
''' <param name="targetControl">
''' The automation element of interest.
''' </param>
''' <returns>
''' A TransformPattern object.
''' </returns>
'''--------------------------------------------------------------------
Private Function GetTransformPattern( _
ByVal targetControl As AutomationElement) As TransformPattern
Dim transformPattern As TransformPattern = Nothing
Try
transformPattern = DirectCast( _
targetControl.GetCurrentPattern(transformPattern.Pattern), _
TransformPattern)
Catch exc As InvalidOperationException
' object doesn't support the TransformPattern control pattern
Return Nothing
End Try
Return transformPattern
End Function 'GetTransformPattern
///--------------------------------------------------------------------
/// <summary>
/// Calls the TransformPattern.Rotate() method for an associated
/// automation element.
/// </summary>
/// <param name="transformPattern">
/// The TransformPattern control pattern obtained from
/// an automation element.
/// </param>
/// <param name="degrees">
/// The amount of degrees to rotate the automation element.
/// </param>
///--------------------------------------------------------------------
private void RotateElement(
TransformPattern transformPattern, double degrees)
{
try
{
if (transformPattern.Current.CanRotate)
{
transformPattern.Rotate(degrees);
}
}
catch (InvalidOperationException)
{
// object is not able to perform the requested action
return;
}
}
'''--------------------------------------------------------------------
''' <summary>
''' Calls the TransformPattern.Rotate() method for an associated
''' automation element.
''' </summary>
''' <param name="transformPattern">
''' The TransformPattern control pattern obtained from
''' an automation element.
''' </param>
''' <param name="degrees">
''' The amount of degrees to rotate the automation element.
''' </param>
'''--------------------------------------------------------------------
Private Sub RotateElement( _
ByVal transformPattern As TransformPattern, ByVal degrees As Double)
Try
If transformPattern.Current.CanRotate Then
transformPattern.Rotate(degrees)
End If
Catch
' object is not able to perform the requested action
Return
End Try
End Sub
備註
物件無法移動、調整大小或旋轉,使其產生的螢幕位置完全超出容器的座標,而且無法存取鍵盤或滑鼠。 例如,當最上層視窗完全從螢幕外移動,或子物件移動超出容器檢視區的界限時。 在這些情況下,物件會盡可能接近要求的螢幕座標,並將上方或左座標覆寫為容器界限內。