type Legend = class(OpenXmlElement)
public
    function Create();overload;
    function Create(_node: XmlNode);overload;
    function Create(_parent: tslobj; _prefix: string; _local_name: string);overload;
    function Init();override;
    function InitAttributes();override;
    function InitChildren();override;
    function InitNode(_node: XmlNode);override;
    function Copy(_obj: Legend);override;

    property Layout read ReadXmlChildLayout write WriteXmlChildLayout;
    function ReadXmlChildLayout();
    function WriteXmlChildLayout(_value);

public
    //  Attributes

    // Children
    LegendPos: PureVal;
    XmlChildLayout: OpenXmlEmpty;
    Overlay: PureVal;
    TxPr: TxPr;

end;

function Legend.Create();overload;
begin
    self.Create(nil, "c", "legend");
end;

function Legend.Create(_node: XmlNode);overload;
begin
    class(OpenXmlElement).Create(_node: XmlNode);
end;

function Legend.Create(_parent: tslobj; _prefix: string; _local_name: string);overload;
begin
    class(OpenXmlElement).Create(_parent, _prefix, _local_name);
end;

function Legend.Init();override;
begin
    self.LegendPos := new PureVal(self, self.Prefix, "legendPos");
    self.XmlChildLayout := new OpenXmlEmpty(self, self.Prefix, "layout");
    self.Overlay := new PureVal(self, self.Prefix, "overlay");
    self.TxPr := new TxPr(self, self.Prefix, "txPr");
end;

function Legend.InitAttributes();override;
begin
    attributes_ := array(
    );
end;

function Legend.InitChildren();override;
begin
    child_elements_ := array(
        0: self.LegendPos,
        1: self.XmlChildLayout,
        2: self.Overlay,
        3: self.TxPr,
    );
    sorted_child_ := array(
        "": -1,
        self.LegendPos.ElementName: 0,
        self.XmlChildLayout.ElementName: 1,
        self.Overlay.ElementName: 2,
        self.TxPr.ElementName: 3,
    );
end;

function Legend.InitNode(_node: XmlNode);override;
begin
    if ifObj(self.XmlNode) then
        for k,v in child_elements_ do v.InitNode(nil);
    self.XmlNode := ifObj(_node) ? _node : nil;
    node := ifObj(_node) ? _node.FirstChild() : nil;
    flag := false;
    if ifnil(child_elements_[0]) and length(child_elements_) > 0 then
    begin
        flag := true;
        arr := child_elements_;
        child_elements_ := array();
    end
    pre := ifString(self.Prefix) ? self.Prefix + ":" : "";
    while ifObj(node) do
    begin
        node_name := node.GetName();
        pos := sorted_child_[node_name];
        if ifnil(pos) or pos = -1 then
        begin
            obj := nil;
            case node_name of
            end;
            if ifObj(obj) then obj.InitNode(node);
        end
        else if flag then
        begin
            obj := arr[pos];
            obj.InitNode(node);
            child_elements_[length(child_elements_)] := obj;
        end
        else begin
            child_elements_[pos].InitNode(node);
        end
        node := node.NextElement();
    end
end;

function Legend.Copy(_obj: Legend);override;
begin
    self.LegendPos.Copy(_obj.LegendPos);
    self.XmlChildLayout.Copy(_obj.XmlChildLayout);
    self.Overlay.Copy(_obj.Overlay);
    self.TxPr.Copy(_obj.TxPr);
end;

function Legend.ReadXmlChildLayout();
begin
    return ifnil(self.XmlChildLayout.Value) ? false : true;
end;

function Legend.WriteXmlChildLayout(_value);
begin
    self.XmlChildLayout.Value := _value;
end;