ScrollPattern.Scroll(ScrollAmount, ScrollAmount) 메서드

정의

네임스페이스:
System.Windows.Automation
어셈블리:
UIAutomationClient.dll

콘텐츠 영역의 표시되는 영역을 가로 및 세로로 스크롤합니다.

public:
 void Scroll(System::Windows::Automation::ScrollAmount horizontalAmount, System::Windows::Automation::ScrollAmount verticalAmount);
public void Scroll(System.Windows.Automation.ScrollAmount horizontalAmount, System.Windows.Automation.ScrollAmount verticalAmount);
member this.Scroll : System.Windows.Automation.ScrollAmount * System.Windows.Automation.ScrollAmount -> unit
Public Sub Scroll (horizontalAmount As ScrollAmount, verticalAmount As ScrollAmount)

매개 변수

horizontalAmount
ScrollAmount

컨트롤과 관련된 가로 증분입니다. NoScroll 컨트롤을 이 방향으로 스크롤할 수 없는 경우 전달되어야 합니다.

verticalAmount
ScrollAmount

컨트롤과 관련된 세로 증분입니다. NoScroll 컨트롤을 이 방향으로 스크롤할 수 없는 경우 전달되어야 합니다.

예외

ArgumentException

컨트롤은 SmallIncrement 가로 또는 세로 스크롤에만 값을 지원하지만 LargeIncrement 값은 전달됩니다.

InvalidOperationException

지원되지 않는 방향으로 스크롤하려고 합니다.

예제

다음 예제 ScrollPattern 에서는 컨트롤 패턴을 가져온 다음 요청된 AutomationElement 양을 가로 또는 세로로 스크롤하는 데 사용됩니다.

///--------------------------------------------------------------------
/// <summary>
/// Obtains a ScrollPattern control pattern from an 
/// automation element.
/// </summary>
/// <param name="targetControl">
/// The automation element of interest.
/// </param>
/// <returns>
/// A ScrollPattern object.
/// </returns>
///--------------------------------------------------------------------
private ScrollPattern GetScrollPattern(
    AutomationElement targetControl)
{
    ScrollPattern scrollPattern = null;

    try
    {
        scrollPattern =
            targetControl.GetCurrentPattern(
            ScrollPattern.Pattern)
            as ScrollPattern;
    }
    // Object doesn't support the ScrollPattern control pattern
    catch (InvalidOperationException)
    {
        return null;
    }

    return scrollPattern;
}

'''--------------------------------------------------------------------
''' <summary>
''' Obtains a ScrollPattern control pattern from an 
''' automation element.
''' </summary>
''' <param name="targetControl">
''' The automation element of interest.
''' </param>
''' <returns>
''' A ScrollPattern object.
''' </returns>
'''--------------------------------------------------------------------
Private Function GetScrollPattern( _
ByVal targetControl As AutomationElement) As ScrollPattern
    Dim scrollPattern As ScrollPattern = Nothing

    Try
        scrollPattern = DirectCast( _
        targetControl.GetCurrentPattern(scrollPattern.Pattern), _
        ScrollPattern)
    Catch
        ' Object doesn't support the ScrollPattern control pattern
        Return Nothing
    End Try

    Return scrollPattern

End Function 'GetScrollPattern

///--------------------------------------------------------------------
/// <summary>
/// Obtains a ScrollPattern control pattern from an automation 
/// element and attempts to scroll the requested amounts.
/// </summary>
/// <param name="targetControl">
/// The automation element of interest.
/// </param>
/// <param name="hScrollAmount">
/// The requested horizontal scroll amount.
/// </param>
/// <param name="vScrollAmount">
/// The requested vertical scroll amount.
/// </param>
///--------------------------------------------------------------------
private void ScrollElement(
    AutomationElement targetControl,
    ScrollAmount hScrollAmount,
    ScrollAmount vScrollAmount)
{
    if (targetControl == null)
    {
        throw new ArgumentNullException(
            "AutomationElement argument cannot be null.");
    }

    ScrollPattern scrollPattern = GetScrollPattern(targetControl);

    if (scrollPattern == null)
    {
        return;
    }

    try
    {
        scrollPattern.Scroll(hScrollAmount, vScrollAmount);
    }
    catch (InvalidOperationException)
    {
        // Control not able to scroll in the direction requested;
        // when scrollable property of that direction is False
        // TO DO: error handling.
    }
    catch (ArgumentException)
    {
        // If a control supports SmallIncrement values exclusively 
        // for horizontal or vertical scrolling but a LargeIncrement 
        // value (NaN if not supported) is passed in.
        // TO DO: error handling.
    }
}

'''--------------------------------------------------------------------
''' <summary>
''' Obtains a ScrollPattern control pattern from an automation 
''' element and attempts to scroll the requested amounts.
''' </summary>
''' <param name="targetControl">
''' The automation element of interest.
''' </param>
''' <param name="hScrollAmount">
''' The requested horizontal scroll amount.
''' </param>
''' <param name="vScrollAmount">
''' The requested vertical scroll amount.
''' </param>
'''--------------------------------------------------------------------
Private Sub ScrollElement( _
ByVal targetControl As AutomationElement, _
ByVal hScrollAmount As ScrollAmount, _
ByVal vScrollAmount As ScrollAmount)
    If targetControl Is Nothing Then
        Throw New ArgumentNullException( _
        "AutomationElement argument cannot be null.")
    End If

    Dim scrollPattern As ScrollPattern = GetScrollPattern(targetControl)

    If scrollPattern Is Nothing Then
        Return
    End If

    Try
        scrollPattern.Scroll(hScrollAmount, vScrollAmount)
    Catch exc As InvalidOperationException
        ' Control not able to scroll in the direction requested;
        ' when scrollable property of that direction is False
        ' TO DO: error handling.
    Catch exc As ArgumentException
        ' If a control supports SmallIncrement values exclusively 
        ' for horizontal or vertical scrolling but a LargeIncrement 
        ' value (NaN if not supported) is passed in.
        ' TO DO: error handling.
    End Try

End Sub

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