/// <summary>
/// Puts gn sibling in parent split of this, in place of this.
/// Makes this invalid and removes from _aSplit.
/// Does not update layout.
/// </summary>
/// <param name="gn">One of children. The caller is removing it from this.</param>
internal void OnChildRemoved(_Node gn)
{
_AssertIsChild(gn);
Debug.Assert(!gn.IsDocked);
var gnOther = gn == Child1 ? Child2 : Child1;
if (this == _manager._firstSplit)
{
var gs = gnOther as _Split;
if (gs == null)
{
//gnOther is _Tab, because the user moved all panels to a single _Tab. We cannot delete this (root) _Split.
var gd = new _DummyNode(_manager, this);
if (gn == Child1)
{
Child1 = gd;
}
else
{
Child2 = gd;
}
//never mind: when saving layout to XML, should remove this dummy node if can. Not necessary, because impossible to create multiple dummy nodes.
return;
}
gs.ParentSplit = null;
_manager._firstSplit = gs;
}
else
{
this.ParentSplit.ReplaceChild(this, gnOther);
}
#if DEBUG
this.Child1 = this.Child2 = null; //to catch invalid usage of this after calling this function
#endif
_manager._aSplit.Remove(this);
}
int _width; //used if !_isFraction; if _isWidth1, it is Child1 width, else Child2 with
/// <summary>
/// This ctor is used at startup, when adding from XML.
/// </summary>
internal _Split(AuDockPanel manager, _Split parentSplit, XElement x) : base(manager, parentSplit)
{
manager._aSplit.Add(this);
if (!x.HasAttr("hor"))
{
IsVerticalSplit = true;
}
int k = x.Attr("splitter", -1); if (k < 0 || k > 20)
{
k = _splitterWidth;
}
this.SplitterWidth = k;
//SHOULDDO: use DPI-dependent units, not pixels. Especially if form size depends on DPI.
if (!(_isFraction = x.Attr(out _fraction, "f")) && !(_isWidth1 = x.Attr(out _width, "w1")))
{
_width = x.Attr("w2", 1);
}
foreach (var xe in x.Elements())
{
_Node gn = null;
switch (xe.Name.LocalName)
{
case "panel":
gn = new _Panel(manager, this, xe);
break;
case "split":
gn = new _Split(manager, this, xe);
break;
case "tab":
gn = new _Tab(manager, this, xe);
break;
case "dummy":
gn = new _DummyNode(_manager, this);
break;
default: continue;
}
if (gn.IsDocked)
{
_dockedChildCount++;
}
if (Child1 == null)
{
Child1 = gn;
}
else
{
Child2 = gn; break;
}
}
if (Child2 == null)
{
throw new Exception();
}
if (_dockedChildCount == 0)
{
this.DockState = _DockState.Hidden;
}
}
