/// <summary>
/// Used when moving a node, to create new parent (this) stack or tab for it and target.
/// Also when moving a node, to create new parent (this) tab for it (target).
/// </summary>
_Node(_Node target, bool isTab, bool verticalStack = false)
{
_pm = target._pm;
bool targetIsRoot = !isTab && target.Parent == null;
if (targetIsRoot)
{
_pm._rootStack = this;
}
else
{
_index = target._index;
target.AddSibling(this, after: false);
target.Remove();
target._index = 0;
}
AddChild(target);
if (isTab)
{
_tab = new();
_elem = _tab.tc = new _TabControl();
}
else
{
_stack = new _StackFields {
isVertical = verticalStack
};
_elem = _stack.grid = new Grid();
}
_elem.Tag = this;
if (targetIsRoot)
{
//target._dockedSize = ...; //_AddToParentWhenMovingOrAddingLater will set it for target and this
_pm._setContainer(_stack.grid);
}
else
{
_ReplaceInStack(target);
if (isTab)
{
_captionAt = target._captionAt;
_InitTabControl();
}
}
}
/// <summary>
/// Used to create nodes when loading from XML.
/// </summary>
_Node(KPanels pm, XElement x, _Node parent, int index)
{
_pm = pm;
_index = index;
string tag = x.Name.LocalName;
if (parent == null) //the root XML element
{
if (tag != "stack")
{
throw new ArgumentException("XML root element must be 'stack'");
}
_pm._rootStack = this;
}
else
{
parent.AddChild(this);
}
switch (tag)
{
case "stack":
_stack = new _StackFields {
isVertical = x.Attr("o") == "v"
};
_elem = _stack.grid = new Grid();
break;
case "tab":
_tab = new();
_elem = _tab.tc = new _TabControl();
break;
case "panel":
case "toolbar":
case "document":
_leaf = new();
_elem = _leaf.panel = new();
_leafType = tag[0] switch { 'p' => LeafType.Panel, 't' => LeafType.Toolbar, _ => LeafType.Document };
_leaf.name = x.Attr("name") ?? throw new ArgumentException("XML element without 'name'");
_Dictionary.Add(_leaf.name, this);
break;
default: throw new ArgumentException("unknown XML tag");
}
_elem.UseLayoutRounding = true;
_elem.Tag = this;
if (parent != null)
{
if (!_IsDocument)
{
_savedDockState = (_DockState)(x.Attr("state", 0) & 3);
_floatSavedRect = x.Attr("floatRect");
}
if (!_IsStack)
{
x.Attr(out _captionAt, "captionAt");
}
if (_ParentIsStack)
{
_dockedSize = _GridLengthFromString(x.Attr("z")); //height in vertical stack or width in horizontal stack
_AddToStack(moving: false, _index == 0 ? 0 : x.Attr("s", c_defaultSplitterSize));
var flags = (_Flags)x.Attr("flags", 0);
if (flags.Has(_Flags.Splitter_ResizeNearest) && _splitter != null)
{
_splitter.ResizeNearest = true;
}
if (_IsTab)
{
_InitTabControl();
}
}
else
{
_AddToTab(moving: false);
}
}
if (!_IsLeaf) //stack or tab
{
if (_ParentIsTab)
{
throw new ArgumentException(tag + " in 'tab'");
}
int i = 0;
foreach (var e in x.Elements())
{
new _Node(_pm, e, this, i++);
}
Debug.Assert(i > 0);
if (_IsTab && i > 0)
{
_tab.tc.SelectedIndex = Math.Clamp(x.Attr("active", 0), 0, i - 1);
}
}
//print.it(new string('\t', parent?.Level ?? 0) + _ntype, _ptype, Name, _indexInParent);
if (parent == null) //the root XML element
{
int nVisible = 0; _Node firstHidden = null;
List <_Node> aFloat = null;
foreach (var v in Descendants())
{
if (!v._IsStack)
{
if (v._IsVisibleReally(true))
{
nVisible++;
}
else
{
firstHidden ??= v;
}
}
var ds = v._savedDockState;
if (ds == _DockState.Float)
{
(aFloat ??= new()).Add(v);
}
else if (ds != 0)
{
v._SetDockState(ds);
}
}
if (nVisible == 0 && firstHidden != null) //if all non-stack hidden, unhide one, else user cannot unhide any because there are no captions to show the context menu
{
firstHidden._SetDockState(0);
}
if (aFloat != null)
{
DependencyPropertyChangedEventHandler eh = null;
eh = (_, e) => {
if (e.NewValue is bool visible && visible)
{
_stack.grid.IsVisibleChanged -= eh;
_stack.grid.Dispatcher.InvokeAsync(() => { foreach (var v in aFloat)
{
v._SetDockState(_DockState.Float);
}
});
}
};
_stack.grid.IsVisibleChanged += eh;
}
//timer.after(1000, _ => _Test(5));
////timer.after(5000, _ => _Test(0));
//void _Test(int margin) {
// foreach (var v in Descendants(true)) {
// if (v._IsStack) v._stack.grid.Background = (v.Level & 3) switch { 0 => Brushes.CornflowerBlue, 1 => Brushes.Khaki, 2 => Brushes.YellowGreen, _ => Brushes.LightYellow };
// if(v!=this) v._elem.Margin = new Thickness(margin);
// if (v._splitter != null) v._splitter.Visibility = Visibility.Collapsed;
// }
//}
////_stack.grid.PreviewMouseMove += _RootGrid_PreviewMouseMove;
}
}
