public void Show(OverlayContent overlayContent)
{
if (OverlayContent != null)
{
throw new InvalidOperationException($"Show {overlayContent.ComponentTypeName} while {OverlayContent.ComponentTypeName} not yet closed.");
}
OverlayContent = overlayContent;
IsVisible = true;
StateHasChanged();
}
public void AddOverlay(VisualElement ve, OverlayContent content = OverlayContent.All)
{
OverlayData overlayData = null;
if (!m_OverlayData.TryGetValue(ve, out overlayData))
{
overlayData = new OverlayData(ve, kDefaultHighlightAlpha);
m_OverlayData[ve] = overlayData;
}
overlayData.content = content;
}
public void Close(OverlayContent overlayContent)
{
// Check for already closed:
if (overlayContent != OverlayContent)
{
return;
}
OverlayContent = null;
IsVisible = false;
StateHasChanged();
}
protected OverlayContentView(bool isChildOfNavigationPage)
{
_backgroundOverlayBoxView = new BoxView
{
BackgroundColor = ColorConstants.WhiteWith75Opacity
};
_backgroundOverlayBoxView.Opacity = 0;
_overlayFrame = new Frame
{
HasShadow = true,
BackgroundColor = Color.White
};
_overlayFrame.Scale = 0;
_relativeLayout = new RelativeLayout();
_relativeLayout.Children.Add(_backgroundOverlayBoxView,
Constraint.Constant(-10),
Constraint.Constant(0),
Constraint.RelativeToParent(parent => parent.Width + 20),
Constraint.RelativeToParent(parent => parent.Height));
_relativeLayout.Children.Add(_overlayFrame,
Constraint.RelativeToParent(parent =>
{
var preferredX = parent.Width / 2 - getOverlayContentWidth(parent) / 2 - 25;
return(preferredX < 10 ? 10 : preferredX);
}),
Constraint.RelativeToParent(parent =>
{
if (isChildOfNavigationPage)
{
return(parent.Height / 4 - getOverlayContentHeight(parent) / 2);
}
return(parent.Height / 2 - getOverlayContentHeight(parent) / 2 - 10);
}),
Constraint.RelativeToParent(parent =>
{
var preferedWidth = getOverlayContentWidth(parent) + 50;
return(preferedWidth > parent.Width ? parent.Width - 20 : preferedWidth);
}),
Constraint.RelativeToParent(parent => getOverlayContentHeight(parent) + 40));
double getOverlayContentHeight(RelativeLayout p) => OverlayContent?.Measure(p.Width, p.Height).Request.Height ?? default;
double getOverlayContentWidth(RelativeLayout p) => OverlayContent?.Measure(p.Width, p.Height).Request.Width ?? default;
}
protected OverlayContentView(bool isChildOfNavigationPage)
{
_backgroundOverlayBoxView = new BoxView
{
BackgroundColor = ColorConstants.WhiteWith75Opacity
};
_backgroundOverlayBoxView.Opacity = 0;
_overlayFrame = new Frame
{
HasShadow = true,
BackgroundColor = Color.White
};
_overlayFrame.Scale = 0;
_relativeLayout = new RelativeLayout();
Func <RelativeLayout, double> getOverlayContentHeight = (p) => OverlayContent.Measure(_relativeLayout.Width, _relativeLayout.Height).Request.Height;
Func <RelativeLayout, double> getOverlayContentWidth = (p) => OverlayContent.Measure(_relativeLayout.Width, _relativeLayout.Height).Request.Width;
_relativeLayout.Children.Add(_backgroundOverlayBoxView,
Constraint.Constant(-10),
Constraint.Constant(0),
Constraint.RelativeToParent(parent => parent.Width + 20),
Constraint.RelativeToParent(parent => parent.Height)
);
_relativeLayout.Children.Add(_overlayFrame,
Constraint.RelativeToParent(parent => parent.Width / 2 - getOverlayContentWidth(parent) / 2 - 25),
Constraint.RelativeToParent(parent =>
{
switch (isChildOfNavigationPage)
{
case true:
return(parent.Height / 4 - getOverlayContentHeight(parent) / 2);
default:
return(parent.Height / 2 - getOverlayContentHeight(parent) / 2 - 10);
}
}),
Constraint.RelativeToParent(parent => getOverlayContentWidth(parent) + 50),
Constraint.RelativeToParent(parent => getOverlayContentHeight(parent) + 40)
);
}
public void Close() => OverlayContent?.Close();
