Export to PDF, Excel in TreeTable,
coding samples of export to PDF and Excel in TreeTable

var options = { 
  flatTree:{
    id:"value",
    columns:[
      { header:"Title" },
      { header:"Section" },
      { header:"Subsection" },
    ]
  }
};

var options2 = { 
  flatTree:{
    id:"value",
    fill:true,
    columns:[
      { header:"Title" },
      { header:"Section" },
      { header:"Subsection" },
    ]
  }
};

var grida = {
  view:"treetable",
  id:"grida",
  columns:[
    { id:"id", header:"", css:{"text-align":"right"}, width:50},
    { id:"value", header:"Film title", fillspace:true,
     template:"{common.treetable()} #value#", exportAsTree:true },
    { id:"chapter",	header:"Mode", width:200}
  ],
  select:"row",
  autoheight:true,
  scroll:false,

  data:[
    { "id":"1", "value":"The Shawshank Redemption", "open":true, "data":[
      { "id":"1.1", "value":"Part 1", "chapter":"alpha"},
      { "id":"1.2", "value":"Part 2", "chapter":"beta", "open":true, "data":[
        { "id":"1.2.1", "value":"Part 1", "chapter":"beta-twin"},
        { "id":"1.2.2", "value":"Part 1", "chapter":"beta-twin"}
      ]},
      { "id":"1.3", "value":"Part 3", "chapter":"gamma" }
    ]},
    { "id":"2", "value":"The Godfather", "data":[
      { "id":"2.1", "value":"Part 1", "chapter":"alpha" },
      { "id":"2.2", "value":"Part 2", "chapter":"beta" }
    ]}
  ]
};

var buttons = {
  margin:10, cols:[
    {
      margin:10, rows:[
        { view:"button", width:110, value:"Get PDF", click:function(){webix.toPDF($$("grida"));} },
        { view:"button", width:110, value:"Get Excel", click:function(){webix.toExcel($$("grida"));} },
        { view:"button", width:110, value:"Get CSV", click:function(){webix.toCSV($$("grida"));} }
      ]
    },
    {
      margin:10, rows:[
        { view:"button", width:110, value:"Get flat PDF", click:function(){webix.toPDF($$("grida"),options);} },
        { view:"button", width:115, value:"Get flat Excel", click:function(){webix.toExcel($$("grida"),options);} },
        { view:"button", width:110, value:"Get flat CSV", click:function(){webix.toCSV($$("grida"),options);} }
      ]
    },
    {
      margin:10, rows:[
        { view:"button", width:110, value:"Get fill PDF", click:function(){webix.toPDF($$("grida"),options2);} },
        { view:"button", width:110, value:"Get fill Excel", click:function(){webix.toExcel($$("grida"),options);} },
        { view:"button", width:110, value:"Get fill CSV", click:function(){webix.toCSV($$("grida"),options2);} }
      ]
    }
  ]
};

webix.ready(function(){
  webix.ui({
    view: "scrollview",
    scroll: "y",
    body: {
      rows:[
        buttons,
        grida,
        {}
      ]
    }
  });
});