private void AssignProportions()
{
double assignedProportion = 0;
int unassignedProportions = 0;
foreach (Control element in GetChildren())
{
if (!(element is ProportionalStackPanelSplitter))
{
var proportion = ProportionalStackPanelSplitter.GetProportion(element);
if (double.IsNaN(proportion))
{
unassignedProportions++;
}
else
{
assignedProportion += proportion;
}
}
}
if (unassignedProportions > 0)
{
var toAssign = assignedProportion;
foreach (Control element in GetChildren().Where(c => double.IsNaN(ProportionalStackPanelSplitter.GetProportion(c))))
{
if (!(element is ProportionalStackPanelSplitter))
{
ProportionalStackPanelSplitter.SetProportion(element, (1.0 - toAssign) / unassignedProportions);
assignedProportion += (1.0 - toAssign) / unassignedProportions;
}
}
}
if (assignedProportion < 1)
{
var numChildren = (double)GetChildren().Where(c => !(c is ProportionalStackPanelSplitter)).Count();
var toAdd = (1.0 - assignedProportion) / numChildren;
foreach (var child in GetChildren().Where(c => !(c is ProportionalStackPanelSplitter)))
{
ProportionalStackPanelSplitter.SetProportion(child, ProportionalStackPanelSplitter.GetProportion(child) + toAdd);
}
}
else if (assignedProportion > 1)
{
var numChildren = (double)GetChildren().Where(c => !(c is ProportionalStackPanelSplitter)).Count();
var toRemove = (assignedProportion - 1.0) / numChildren;
foreach (var child in GetChildren().Where(c => !(c is ProportionalStackPanelSplitter)))
{
ProportionalStackPanelSplitter.SetProportion(child, ProportionalStackPanelSplitter.GetProportion(child) - toRemove);
}
}
}
/// <inheritdoc/>
protected override void ChildrenChanged(object sender, NotifyCollectionChangedEventArgs e)
{
base.ChildrenChanged(sender, e);
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
foreach (var item in e.NewItems.OfType <IControl>())
{
ProportionalStackPanelSplitter.SetProportion(item as IControl, double.NaN);
}
break;
}
}