protected override void forgetChild(Element child)
{
D.assert(this.slotToChild.Values.Contains(child));
D.assert(this.childToSlot.Keys.Contains(child));
_ListTileSlot slot = this.childToSlot[child];
this.childToSlot.Remove(child);
this.slotToChild.Remove(slot);
}
protected override void removeChildRenderObject(RenderObject child)
{
D.assert(child is RenderBox);
D.assert(this.renderObject.childToSlot.Keys.Contains(child));
_ListTileSlot slot = this.renderObject.childToSlot[(RenderBox)child];
this._updateRenderObject(null, slot);
D.assert(!this.renderObject.childToSlot.Keys.Contains(child));
D.assert(!this.renderObject.slotToChild.Keys.Contains(slot));
}
protected override void insertChildRenderObject(RenderObject child, object slotValue)
{
D.assert(child is RenderBox);
D.assert(slotValue is _ListTileSlot);
_ListTileSlot slot = (_ListTileSlot)slotValue;
this._updateRenderObject(child, slot);
D.assert(this.renderObject.childToSlot.Keys.Contains(child));
D.assert(this.renderObject.slotToChild.Keys.Contains(slot));
}
public override void forgetChild(Element child)
{
D.assert(slotToChild.Values.Contains(child));
D.assert(childToSlot.Keys.Contains(child));
_ListTileSlot slot = childToSlot[child];
childToSlot.Remove(child);
slotToChild.Remove(slot);
base.forgetChild(child);
}
void _updateChild(Widget widget, _ListTileSlot slot)
{
Element oldChild = this.slotToChild.getOrDefault(slot);
Element newChild = this.updateChild(oldChild, widget, slot);
if (oldChild != null)
{
this.childToSlot.Remove(oldChild);
this.slotToChild.Remove(slot);
}
if (newChild != null)
{
this.slotToChild[slot] = newChild;
this.childToSlot[newChild] = slot;
}
}
RenderBox _updateChild(RenderBox oldChild, RenderBox newChild, _ListTileSlot slot)
{
if (oldChild != null)
{
this.dropChild(oldChild);
this.childToSlot.Remove(oldChild);
this.slotToChild.Remove(slot);
}
if (newChild != null)
{
this.childToSlot[newChild] = slot;
this.slotToChild[slot] = newChild;
this.adoptChild(newChild);
}
return(newChild);
}
void _updateRenderObject(RenderObject child, _ListTileSlot slot)
{
switch (slot)
{
case _ListTileSlot.leading:
this.renderObject.leading = (RenderBox)child;
break;
case _ListTileSlot.title:
this.renderObject.title = (RenderBox)child;
break;
case _ListTileSlot.subtitle:
this.renderObject.subtitle = (RenderBox)child;
break;
case _ListTileSlot.trailing:
this.renderObject.trailing = (RenderBox)child;
break;
}
}
