/**
* Gets the bounds of the display feature translated to the View's coordinate space and current
* position in the window. This will also include view padding in the calculations.
*/
public static Rect GetFeaturePositionInViewRect(IDisplayFeature displayFeature, View view, bool includePadding = true)
{
// The the location of the view in window to be in the same coordinate space as the feature.
var viewLocationInWindow = new int[2]; // IntArray(2);
view.GetLocationInWindow(viewLocationInWindow);
// Intersect the feature rectangle in window with view rectangle to clip the bounds.
var viewRect = new Rect(
viewLocationInWindow[0], viewLocationInWindow[1],
viewLocationInWindow[0] + view.Width, viewLocationInWindow[1] + view.Height
);
// Include padding if needed
if (includePadding)
{
viewRect.Left += view.PaddingLeft;
viewRect.Top += view.PaddingTop;
viewRect.Right -= view.PaddingRight;
viewRect.Bottom -= view.PaddingBottom;
}
var featureRectInView = new Rect(displayFeature.Bounds);
var intersects = featureRectInView.Intersect(viewRect);
if ((featureRectInView.Width() == 0 && featureRectInView.Height() == 0) || !intersects)
{
return(null);
}
// Offset the feature coordinates to view coordinate space start point
featureRectInView.Offset(-viewLocationInWindow[0], -viewLocationInWindow[1]);
return(featureRectInView);
}
bool IsValidFoldFeature(IDisplayFeature displayFeature)
{
var ff = displayFeature.JavaCast <IFoldingFeature>();
if (ff != null)
{
if (ff.IsSeparating)
{
return(SampleTools.GetFeaturePositionInViewRect(ff, this) != null);
}
else
{
return(false); // if not separating, ignore it as a fold
}
}
return(false);
}
/**
* Gets the layout params for placing a rectangle indicating a display feature inside a
* [FrameLayout].
*/
public static FrameLayout.LayoutParams GetLayoutParamsForFeatureInFrameLayout(IDisplayFeature displayFeature, FrameLayout view)
{
var featureRectInView = GetFeaturePositionInViewRect(displayFeature, view);
if (featureRectInView is null)
{
return(null);
}
var lp = new FrameLayout.LayoutParams(featureRectInView.Width(), featureRectInView.Height());
lp.LeftMargin = featureRectInView.Left;
lp.TopMargin = featureRectInView.Top;
return(lp);
}
