deserialize method

Implementation

@override
void deserialize(XmlElement xml)
{
  // deserialize
  super.deserialize(xml);

  // set constraints
  width     = Xml.get(node: xml, tag: 'width');
  height    = Xml.get(node: xml, tag: 'height');
  minWidth  = Xml.get(node: xml, tag: 'minwidth');
  maxWidth  = Xml.get(node: xml, tag: 'maxwidth');
  minHeight = Xml.get(node: xml, tag: 'minheight');
  maxHeight = Xml.get(node: xml, tag: 'maxheight');

  // properties
  visible   = Xml.get(node: xml, tag: 'visible');
  enabled   = Xml.get(node: xml, tag: 'enabled');
  halign    = Xml.get(node: xml, tag: 'halign');
  valign    = Xml.get(node: xml, tag: 'valign');
  flex      = Xml.get(node: xml, tag: 'flex');
  flexfit   = Xml.get(node: xml, tag: 'flexfit');
  onscreen  = Xml.get(node: xml, tag: 'onscreen');
  offscreen = Xml.get(node: xml, tag: 'offscreen');

  // view sizing and position
  // these are treated differently for efficiency reasons
  // we only create the observable if its bound to in the template
  // otherwise we just store the value in a simple double variable
  String? key;
  if (WidgetModel.isBound(this, key = Binding.toKey(id, 'viewwidth')))  _viewWidthObservable  = DoubleObservable(key, null, scope: scope);
  if (WidgetModel.isBound(this, key = Binding.toKey(id, 'viewheight'))) _viewHeightObservable = DoubleObservable(key, null, scope: scope);
  if (WidgetModel.isBound(this, key = Binding.toKey(id, 'viewx')))      _viewXObservable      = DoubleObservable(key, null, scope: scope);
  if (WidgetModel.isBound(this, key = Binding.toKey(id, 'viewy')))      _viewYObservable      = DoubleObservable(key, null, scope: scope);

  // view requires a VisibilityDetector if either onstage or offstage is set or
  // someone is bound to my visibility
  _addVisibilityDetector = visible && (!S.isNullOrEmpty(onscreen) || !S.isNullOrEmpty(offscreen) || WidgetModel.isBound(this, Binding.toKey(id, 'visiblearea')) || WidgetModel.isBound(this, Binding.toKey(id, 'visibleheight')) || WidgetModel.isBound(this, Binding.toKey(id, 'visiblewidth')));

  // set margins. Can be comma separated top,left,bottom,right
  // space around the widget
  var margins = Xml.attribute(node: xml, tag: 'margin') ?? Xml.attribute(node: xml, tag: 'margins');
  this.margins = margins;

  // set padding. Can be comma separated top,left,bottom,right
  // space around the widget's children
  var padding = Xml.attribute(node: xml, tag: 'pad') ?? Xml.attribute(node: xml, tag: 'padding') ?? Xml.attribute(node: xml, tag: 'padd');
  this.padding = padding;

  // tip
  List<TooltipModel> tips = findChildrenOfExactType(TooltipModel).cast<TooltipModel>();
  if (tips.isNotEmpty)
  {
    tipModel = tips.first;
    removeChildrenOfExactType(TooltipModel);
  }

  // add animations
  children?.forEach((child)
  {
    if (child is AnimationModel)
    {
      animations ??= [];
      animations!.add(child);
    }
  });

  // remove animations from child list
  if (animations != null) children?.removeWhere((element) => animations!.contains(element));
}