TransformPattern.TransformPatternInformation.CanResize 属性

定义

命名空间:

System.Windows.Automation

程序集:

UIAutomationClient.dll

获取一个值，该值指定是否可以调整UI 自动化元素的大小。

public:
 property bool CanResize { bool get(); };

public bool CanResize { get; }

member this.CanResize : bool

Public ReadOnly Property CanResize As Boolean

属性值

Boolean

如果元素可以调整大小，则为 true；否则为 false。

示例

在下面的示例中，从一个TransformPatternAutomationElement控件模式获取，随后用于调整其AutomationElement大小。

///--------------------------------------------------------------------
/// <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.Resize() method for an associated 
/// automation element.
/// </summary>
/// <param name="transformPattern">
/// The TransformPattern control pattern obtained from
/// an automation element.
/// </param>
/// <param name="width">
/// The requested width of the automation element.
/// </param>
/// <param name="height">
/// The requested height of the automation element.
/// </param>
///--------------------------------------------------------------------
private void ResizeElement(
    TransformPattern transformPattern, double width, double height)
{
    try
    {
        if (transformPattern.Current.CanResize)
        {
            transformPattern.Resize(width, height);
        }
    }
    catch (InvalidOperationException)
    {
        // object is not able to perform the requested action
        return;
    }
}

'''--------------------------------------------------------------------
''' <summary>
''' Calls the TransformPattern.Resize() method for an associated 
''' automation element.
''' </summary>
''' <param name="transformPattern">
''' The TransformPattern control pattern obtained from
''' an automation element.
''' </param>
''' <param name="width">
''' The requested width of the automation element.
''' </param>
''' <param name="height">
''' The requested height of the automation element.
''' </param>
'''--------------------------------------------------------------------
Private Sub ResizeElement( _
ByVal transformPattern As TransformPattern, _
ByVal width As Double, ByVal height As Double)
    Try
        If transformPattern.Current.CanResize Then
            transformPattern.Resize(width, height)
        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，使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，当顶层窗口完全从屏幕外移动或子对象移动到容器视区边界之外时。 在这些情况下，对象尽可能靠近所请求的屏幕坐标，顶部或左侧坐标被覆盖在容器边界内。