/// <summary>
/// Determine the size of the panel.
/// </summary>
/// <param name="availableSize">The available size, in logical pixels.</param>
/// <returns>The size of the panel, in logical pixel.</returns>
public Size Measure(Size availableSize)
{
IDisposable traceActivity = null;
if (_trace.IsEnabled)
{
traceActivity = _trace.WriteEventActivity(
FrameworkElement.TraceProvider.FrameworkElement_MeasureStart,
FrameworkElement.TraceProvider.FrameworkElement_MeasureStop,
new object[] { LoggingOwnerTypeName, Panel.GetDependencyObjectId() }
);
}
using (traceActivity)
{
//Constrain the size of the slot to the child's own constraints (it will not do it by itself)
var constrainedSize = GetConstrainedSize(availableSize);
var measuredSize = MeasureOverride(constrainedSize);
//Constrain the output of the child's measure, as will not have applied its own
//MaxWidth/MaxHeight/MinWidth/MinHeight/Width/Height
var size = GetConstrainedSize(measuredSize);
SetDesiredChildSize(this.Panel as View, size);
return(size);
}
}
/// <summary>
/// Determine the size of the panel.
/// </summary>
/// <param name="availableSize">The available size, in logical pixels.</param>
/// <returns>The size of the panel, in logical pixel.</returns>
public Size Measure(Size availableSize)
{
IDisposable traceActivity = null;
if (_trace.IsEnabled)
{
traceActivity = _trace.WriteEventActivity(
FrameworkElement.TraceProvider.FrameworkElement_MeasureStart,
FrameworkElement.TraceProvider.FrameworkElement_MeasureStop,
new object[] { LoggingOwnerTypeName, Panel.GetDependencyObjectId() }
);
}
using (traceActivity)
{
//Constrain the size of the slot to the child's own constraints (it will not do it by itself)
var constrainedSize = GetConstrainedSize(availableSize);
var measuredSize = MeasureOverride(constrainedSize);
//Constrain the output of the child's measure, as will not have applied its own
//MaxWidth/MaxHeight/MinWidth/MinHeight/Width/Height
var size = GetConstrainedSize(measuredSize);
var desiredSize = size;
if (this.Panel is FrameworkElement frameworkElement && frameworkElement.Visibility == Visibility.Visible)
{
// DesiredSize must include margins
// However, we report the size to the parent without the margins
var margin = frameworkElement.Margin;
// This condition is required because of the measure caching that
// some systems apply (Like android UI).
if (margin != Thickness.Empty)
{
desiredSize = new Size(
desiredSize.Width + margin.Left + margin.Right,
desiredSize.Height + margin.Top + margin.Bottom
);
}
}
SetDesiredChildSize(this.Panel as View, desiredSize);
return(size);
}
}
