/// <inheritdoc />
protected override global::Avalonia.Size MeasureOverride(global::Avalonia.Size availableSize)
{
// Retrieve bitmap size
global::Avalonia.Size?bitmapSize;
lock (_bitmapReplacementLock)
bitmapSize = _bitmap?.Size;
// Has any bitmap been rendered yet?
if (!bitmapSize.HasValue)
{
return(global::Avalonia.Size.Empty);
}
// Request the size of the current bitmap
return(bitmapSize.Value);
}
protected override global::Avalonia.Size ArrangeOverride(global::Avalonia.Size finalSize)
{
if (Element == null)
{
return(finalSize);
}
Element.IsInNativeLayout = true;
var stepX = 1;
var stepY = 1;
for (var i = 0; i < ElementController.LogicalChildren.Count; i++)
{
var child = ElementController.LogicalChildren[i] as VisualElement;
if (child == null)
{
continue;
}
IVisualElementRenderer renderer = Platform.GetRenderer(child);
if (renderer == null)
{
continue;
}
Rectangle bounds = child.Bounds;
var control = renderer.GetNativeElement();
var width = Math.Max(bounds.Width, control.DesiredSize.Width);
var height = Math.Max(bounds.Height, control.DesiredSize.Height);
if (stepX != 1 && stepY != 1 && stepX != 0 && stepY != 0)
{
control.Width = width = Math.Ceiling(width / stepX) * stepX;
control.Height = height = Math.Ceiling(height / stepY) * stepY;
}
var childRect = new global::Avalonia.Rect(bounds.X, bounds.Y, width, height);
control.Arrange(childRect);
}
Element.IsInNativeLayout = false;
return(finalSize);
}
public virtual SizeRequest GetDesiredSize(double widthConstraint, double heightConstraint)
{
if (Control == null)
{
return(new SizeRequest());
}
var constraint = new global::Avalonia.Size(widthConstraint, heightConstraint);
if (Element.HeightRequest == -1)
{
Control.Height = double.NaN;
}
if (Element.WidthRequest == -1)
{
Control.Width = double.NaN;
}
Control.Measure(constraint);
return(new SizeRequest(new Size(Math.Ceiling(Control.DesiredSize.Width), Math.Ceiling(Control.DesiredSize.Height))));
}
protected override global::Avalonia.Size MeasureOverride(global::Avalonia.Size availableSize)
{
var baseDesiredSize = base.MeasureOverride(availableSize);
bool hasVisibleChild = false;
if (Element == null || availableSize.Width * availableSize.Height == 0)
{
return(new global::Avalonia.Size(0, 0));
}
Element.IsInNativeLayout = true;
for (var i = 0; i < ElementController.LogicalChildren.Count; i++)
{
var child = ElementController.LogicalChildren[i] as VisualElement;
if (child == null)
{
continue;
}
IVisualElementRenderer renderer = Platform.GetRenderer(child);
if (renderer == null)
{
continue;
}
Control control = renderer.GetNativeElement();
bool isVisible = control.IsVisible;
if (isVisible && !hasVisibleChild)
{
hasVisibleChild = true;
}
var controlBounds = control.Bounds;
if (controlBounds.Width != child.Width || controlBounds.Height != child.Height)
{
double width = child.Width <= -1 ? availableSize.Width : child.Width;
double height = child.Height <= -1 ? availableSize.Height : child.Height;
control.Measure(new global::Avalonia.Size(width, height));
var childDesiredSize = control.DesiredSize;
}
}
global::Avalonia.Size result;
if (double.IsInfinity(availableSize.Width) || double.IsPositiveInfinity(availableSize.Height))
{
Size request = Element.Measure(availableSize.Width, availableSize.Height, MeasureFlags.IncludeMargins).Request;
result = new global::Avalonia.Size(request.Width, request.Height);
}
else
{
result = availableSize;
}
Element.IsInNativeLayout = false;
if (Double.IsPositiveInfinity(result.Height))
{
result = result.WithHeight(0.0);
}
if (Double.IsPositiveInfinity(result.Width))
{
result = result.WithWidth(0.0);
}
var finalDesiredSize = new global::Avalonia.Size(Math.Max(baseDesiredSize.Width, result.Width), Math.Max(baseDesiredSize.Height, result.Height));
return(result);
}
protected override global::Avalonia.Size MeasureOverride(global::Avalonia.Size availableSize) =>
Painter.Measure((float)availableSize.Width) is
{
