TransformPattern.Rotate(Double) 方法

定义

命名空间:

System.Windows.Automation

程序集:

UIAutomationClient.dll

旋转控件。

public:
 void Rotate(double degrees);

public void Rotate (double degrees);

member this.Rotate : double -> unit

Public Sub Rotate (degrees As Double)

参数

degrees

Double

将元素旋转的度数。 正数会顺时针旋转；负数会逆时针旋转。

例外

InvalidOperationException

CanRotate 属性为 false。

示例

在下面的示例中，从一个TransformPatternAutomationElement控件模式获取，随后用于旋转该AutomationElement模式。

///--------------------------------------------------------------------
/// <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

注解

无法移动、调整对象大小或旋转对象，以便其生成的屏幕位置完全超出其容器的坐标，并且无法访问键盘或鼠标。 例如，当顶级窗口完全移出屏幕外或子对象在容器视区边界之外移动时。 在这些情况下，对象尽可能接近所请求的屏幕坐标，并覆盖顶部或左侧坐标，以位于容器边界内。