PDFOffice_Windows_exe/PDF Office/ViewModels/EditTools/Watermark/WatermarkTemplateListFileContentViewModel.cs

using PDF_Office.Properties;
using PDFSettings;
using Prism.Commands;
using Prism.Mvvm;
using Prism.Regions;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Windows;

namespace PDF_Office.ViewModels.EditTools.Watermark
{
    public class WatermarkTemplateListFileContentViewModel : BindableBase, INavigationAware
    {
       
        public ObservableCollection<WatermarkItem> watermarkModFileCollection = new ObservableCollection<WatermarkItem>();
        public ObservableCollection<WatermarkItem> WatermarkModFileCollection
        {
            get { return watermarkModFileCollection; }
            set
            {
                watermarkModFileCollection = value;
                RaisePropertyChanged();
            }
        }

        private Visibility _createTemplateVisible;
        public Visibility CreateTemplateVisible
        {
            get { return _createTemplateVisible; }
            set { SetProperty(ref _createTemplateVisible, value); }
        }

        public DelegateCommand AddTemplateCommand { get; set; }
        public DelegateCommand<object> DeleteTemplateItemCommand { get; set; }

        public WatermarkTemplateListFileContentViewModel()
        {
            AddTemplateCommand = new DelegateCommand(AddTemplate);
            DeleteTemplateItemCommand = new DelegateCommand<object>(DeleteTemplateItem);
        }

        private void CheckTemplateListIsEmpty(List<WatermarkItem> watermarkTemplateList)
        {
            if (watermarkTemplateList.Count() == 0)
            {
                CreateTemplateVisible = Visibility.Visible;
            }
            else
            {
                CreateTemplateVisible = Visibility.Collapsed;
            }
        }

        private void GetWatermarkSource()
        {
            List<WatermarkItem> watermarkModTextTemplateList = new List<WatermarkItem>();
            for (int temp = 0; temp < Settings.Default.WatermarkTemplateList.Count; temp++)
            {
                if (Settings.Default.WatermarkTemplateList[temp].type == ComPDFKit.PDFWatermark.C_Watermark_Type.WATERMARK_TYPE_IMG)
                {


                    watermarkModTextTemplateList.Add(Settings.Default.WatermarkTemplateList[temp]);
                }
            }
            WatermarkModFileCollection = new ObservableCollection<WatermarkItem>(watermarkModTextTemplateList);
            CheckTemplateListIsEmpty(watermarkModTextTemplateList);
        }



        private void InitWatermarkTemplateList()
        {
            if (Settings.Default.WatermarkTemplateList == null)
            {
                Settings.Default.WatermarkTemplateList = new WatermarkTemplateList();
            }
            GetWatermarkSource();
        }

        private void UpdateWatermarkSources()
        {
            List<WatermarkItem> watermarkModTextTemplateList = new List<WatermarkItem>();
            for (int temp = 0; temp < Settings.Default.WatermarkTemplateList.Count; temp++)
            {
                if (Settings.Default.WatermarkTemplateList[temp].type == ComPDFKit.PDFWatermark.C_Watermark_Type.WATERMARK_TYPE_IMG)
                {
                    watermarkModTextTemplateList.Add(Settings.Default.WatermarkTemplateList[temp]);
                }
            }
            WatermarkModFileCollection = new ObservableCollection<WatermarkItem>(watermarkModTextTemplateList);
            CheckTemplateListIsEmpty(watermarkModTextTemplateList);
        }

        public void AddTemplate()
        {
            var watermarkItem = new WatermarkItem();
            watermarkItem.pageRange = "0";
            watermarkItem.type = ComPDFKit.PDFWatermark.C_Watermark_Type.WATERMARK_TYPE_IMG;
            watermarkItem.templateName += Settings.Default.WatermarkIndex.ToString();
            Settings.Default.WatermarkTemplateList.Add(watermarkItem);
            Settings.Default.Save();
            UpdateWatermarkSources();
        }

        public void DeleteTemplateItem(object e)
        {
            var btn = e as System.Windows.Controls.Button;
            if (btn == null)
            {
                return;
            }
            var template = btn.DataContext as WatermarkItem;
            if (template == null)
            {
                return;
            }
            Settings.Default.AppProperties.NeedToDeletePath.Add(template.previeImagePath);
            Settings.Default.AppProperties.NeedToDeletePath.Add(template.imagepath);

            Settings.Default.WatermarkTemplateList.Remove(template);
            Settings.Default.Save();

            WatermarkModFileCollection.Remove(template);
            UpdateWatermarkSources();

        }

        public bool IsNavigationTarget(NavigationContext navigationContext)
        {
            return true;
        }

        public void OnNavigatedFrom(NavigationContext navigationContext)
        {
        }

        public void OnNavigatedTo(NavigationContext navigationContext)
        {
        }
    }
}