TransformPattern.Rotate Method (Double)

 

Rotates the control.

Namespace:   System.Windows.Automation
Assembly:  UIAutomationClient (in UIAutomationClient.dll)

public void Rotate(
	double degrees
)

Parameters

degrees
Type: System.Double

The number of degrees to rotate the element. A positive number rotates clockwise; a negative number rotates counterclockwise.

Exception Condition
InvalidOperationException

The CanRotate property is false.

An object cannot be moved, resized, or rotated such that its resulting screen location would be completely outside the coordinates of its container and inaccessible to keyboard or mouse. For example, when a top-level window is moved completely off-screen or a child object is moved outside the boundaries of the container's viewport. In these cases the object is placed as close to the requested screen coordinates as possible with the top or left coordinates overridden to be within the container boundaries.

In the following example, a TransformPattern control pattern is obtained from an AutomationElement and subsequently used to rotate the 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>
/// 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;
    }
}

.NET Framework
Available since 3.0
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