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);
}
Rect[] SplitViewPositions(View startView, View endView)
{
//TODO:
if (windowLayoutInfo == null || startView == null || endView == null)
{
return(null);
}
// Calculate the area for view's content with padding
var paddedWidth = Width - PaddingLeft - PaddingRight;
var paddedHeight = Height - PaddingTop - PaddingBottom;
var df = windowLayoutInfo.DisplayFeatures.FirstOrDefault();
if (IsValidFoldFeature(df))
{
var feature = df.JavaCast <IFoldingFeature>();
var it = SampleTools.GetFeaturePositionInViewRect(df, this);
if (feature.Bounds.Left == 0)
{ // Horizontal layout
var topRect = new Rect(
PaddingLeft, PaddingTop,
PaddingLeft + paddedWidth, it.Top
);
var bottomRect = new Rect(
PaddingLeft, it.Bottom,
PaddingLeft + paddedWidth, PaddingTop + paddedHeight
);
if (MeasureAndCheckMinSize(topRect, startView) &&
MeasureAndCheckMinSize(bottomRect, endView)
)
{
return(new Rect[] { topRect, bottomRect });
}
}
else if (feature.Bounds.Top == 0)
{ // Vertical layout
var leftRect = new Rect(
PaddingLeft, PaddingTop,
it.Left, PaddingTop + paddedHeight
);
var rightRect = new Rect(
it.Right, PaddingTop,
PaddingLeft + paddedWidth, PaddingTop + paddedHeight
);
if (MeasureAndCheckMinSize(leftRect, startView) &&
MeasureAndCheckMinSize(rightRect, endView)
)
{
return(new Rect[] { leftRect, rightRect });
}
}
}
// We have tried to fit the children and measured them previously. Since they didn't fit,
// we need to measure again to update the stored values.
Measure(lastWidthMeasureSpec, lastHeightMeasureSpec);
return(null);
}