ZoomPanelCalculateVisibleArea Method

public bool CalculateVisibleArea(
	out Rect relativeVisibleArea,
	out Rect absoluteVisibleArea
)

Parameters

relativeVisibleArea

Type: System.WindowsRect
out: relativeVisibleArea

absoluteVisibleArea

Type: System.WindowsRect
out: absoluteVisibleArea in the coordinates of the content

Return Value

This method calculates the visible area that is would be shown if ZoomPanel.Viewbox would be (0,0,1,1).

The relativeVisibleArea is different from the Viewbox because the Viewbox property does not reflect the different aspect ration of ZoomPanel and its content. The relativeVisibleArea reflects how much empty space is around the content when the whole content is shown (Viewbox=0,0,1,1).

ZoomPanel size: width = 200, height = 300
Content size: width = 2000, height = 1000

Results:
relativeVisibleArea = (0, -1, 1, 3) - the height is increased 3 times to show the whole content
absoluteVisibleArea = (0, -1000, 2000, 3000) - in content units the size of the whole shown area is 2000 x 3000

Reference