using Autodesk.Revit.Attributes;
using Autodesk.Revit.DB;

using Nice3point.Revit.Toolkit.External;

using System;

using System.Linq;

namespace Szmedi.RvKits.DisplayTools
{
    /// <summary>
    /// 修改颜色
    /// </summary>
    [Transaction(TransactionMode.Manual)]

    public class OverrideElementsCmd : ExternalCommand
    {
        public override void Execute()
        {
            try
            {
                var elems = UiDocument.Selection.PickElementsByRectangle(new GenericFilter<Element>(), "请选择元素");
                var pat = new FilteredElementCollector(Document)
                    .OfClass(typeof(FillPatternElement))
                    .ToElements()
                    .Cast<FillPatternElement>()
                    .Where(pattern =>
                    {
                        var fill = pattern.GetFillPattern();
                        return fill.Target == FillPatternTarget.Drafting
                            && fill.HostOrientation == FillPatternHostOrientation.ToView
                            && fill.IsSolidFill;
                    })
                    .FirstOrDefault();
                Document.Invoke(
                    ts =>
                    {
                        foreach (var elem in elems)
                        {
                            var overrideGraphicSettings = Document.ActiveView.GetElementOverrides(elem.Id);
                            overrideGraphicSettings.SetSurfaceTransparency(20);
#if REVIT2018
                            overrideGraphicSettings.SetProjectionFillColor(new Color(24, 100, 24));
                            overrideGraphicSettings.SetProjectionFillPatternId(pat.Id); //实体填充
#elif REVIT2020 || REVIT2019
                            overrideGraphicSettings.SetSurfaceForegroundPatternColor(new Color(24, 100, 24));
                            overrideGraphicSettings.SetSurfaceForegroundPatternId(pat.Id); //实体填充
#endif
                            Document.ActiveView.SetElementOverrides(elem.Id, overrideGraphicSettings);
                        }
                        //var elemIds = elems.Select(e => e.Id).ToList();
                        //uidoc.doc.ActiveView.HideElements(elemIds);
                    },
                    "修改外观颜色"
                );
            }
            catch (Autodesk.Revit.Exceptions.OperationCanceledException) { }
            catch (Exception) { }
        }
    }
}