void Pack(Widget widget, bool?expand, WidgetPlacement align, PackOrigin ptype)
{
if (expand.HasValue)
{
if (direction == Orientation.Vertical)
{
widget.ExpandVertical = expand.Value;
}
else
{
widget.ExpandHorizontal = expand.Value;
}
}
if (align != default(WidgetPlacement))
{
if (direction == Orientation.Vertical)
{
widget.VerticalPlacement = align;
}
else
{
widget.HorizontalPlacement = align;
}
}
if (widget == null)
{
throw new ArgumentNullException("widget");
}
var p = new BoxPlacement((WidgetBackendHost)BackendHost, widget);
p.PackOrigin = ptype;
children.Add(p);
}
internal protected virtual void OnReplaceChild(BoxPlacement placement, Widget oldWidget, Widget newWidget)
{
if (oldWidget != null)
{
OnRemove(oldWidget);
}
OnAdd(newWidget, placement);
}
void Pack(Widget widget, BoxMode mode, int padding, PackOrigin ptype)
{
var p = new BoxPlacement((WidgetBackendHost)BackendHost, widget);
p.BoxMode = mode;
p.Padding = padding;
p.PackOrigin = ptype;
children.Add(p);
}
void Pack(Widget widget, BoxMode mode, int padding, PackOrigin ptype)
{
var p = new BoxPlacement((EventSink)WidgetEventSink, widget);
p.BoxMode = mode;
p.Padding = padding;
p.PackOrigin = ptype;
children.Add(p);
}
void Pack(Widget widget, BoxMode mode, double padding, PackOrigin ptype)
{
if (widget == null)
{
throw new ArgumentNullException("widget");
}
if (padding < 0)
{
throw new ArgumentException("padding can't be negative");
}
var p = new BoxPlacement((WidgetBackendHost)BackendHost, widget);
p.BoxMode = mode;
p.Padding = padding;
p.PackOrigin = ptype;
children.Add(p);
}
void OnChildChanged(BoxPlacement placement, object hint)
{
OnPreferredSizeChanged();
}
void OnAdd(Widget child, BoxPlacement placement)
{
RegisterChild(child);
Backend.Add((IWidgetBackend)GetBackend(child));
OnPreferredSizeChanged();
}