IXRRotateTransform::GetCenterX (Compact 2013)
3/28/2014
This method retrieves the x-coordinate of the rotation center point.
Syntax
virtual HRESULT STDMETHODCALLTYPE GetCenterX(
float* pCenterX
) = 0;
Parameters
- pCenterX
[out] Pointer to a value that indicates the x-coordinate of the center of rotation.
Return Value
Returns an HRESULT that indicates success or failure.
Remarks
When you use an IXRRotateTransform object, the transformation rotates the coordinate system for a particular object around the point (0,0). The object itself is not necessarily rotated around its center. For example, if an object is positioned 200 units from the x-axis, a rotation of 30 degrees will swing the object 30 degrees along a circle that has a radius of 200 centered at the origin. To rotate an object in place, pass the x-coordinate and y-coordinate of the center of the object in IXRRotateTransform::SetCenterX and IXRRotateTransform::SetCenterY.
The local origin point for an object can be offset on an IXRCanvas container object by setting the Canvas.Left and Canvas.Top attached properties through IXRDependencyObject::SetAttachedProperty. However, this does not count as a transform. The object keeps its own local origin point for transformation purposes.
.NET Framework Equivalent
System.Windows.Media.RotateTransform.CenterX
Requirements
Header |
XamlRuntime.h |
sysgen |
SYSGEN_XAML_RUNTIME |