PDFOffice_Windows_exe/PDF Office/ViewModels/PropertyPanel/AnnotPanel/CustomCreateDialogViewModel.cs

using ComPDFKit.PDFAnnotation;
using ComPDFKitViewer.PdfViewer;
using PDF_Office.Model;
using Prism.Commands;
using Prism.Mvvm;
using Prism.Services.Dialogs;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;

namespace PDF_Office.ViewModels.PropertyPanel.AnnotPanel
{
    class CustomCreateDialogViewModel : BindableBase, IDialogAware
    {
        public string Title => ".";

        public event Action<IDialogResult> RequestClose;
        public DelegateCommand CancelCommand { get; set; }

        public DelegateCommand CreateCommnad { get; set; }

        public DelegateCommand UpDataDynamicCommnad { get; set; }

        public DelegateCommand<object> KeyDown { get; set; }

        private BitmapSource imageSource;
        public BitmapSource ImageSource
        {
            get { return imageSource; }
            set
            {
                SetProperty(ref imageSource, value);
            }
        }
        private string stampText = "Stamp Text";

        public string StampText
        {
            get { return stampText; }
            set
            {
                SetProperty(ref stampText, value);
            }
        }
        private bool isCheckedDate;

        public bool IsCheckedDate
        {
            get { return isCheckedDate; }
            set
            {
                SetProperty(ref isCheckedDate, value);
                UpDataStamp();
            }
        }
        private bool isCheckedTime;

        public bool IsCheckedTime
        {
            get { return isCheckedTime; }
            set
            {
                SetProperty(ref isCheckedTime, value);
                UpDataStamp();
            }
        }

        private C_TEXTSTAMP_SHAPE shape = C_TEXTSTAMP_SHAPE.TEXTSTAMP_RECT;

        public C_TEXTSTAMP_SHAPE Shape
        {
            get { return shape; }
            set { shape = value; }
        }

        private C_TEXTSTAMP_COLOR color = C_TEXTSTAMP_COLOR.TEXTSTAMP_RED;

        public C_TEXTSTAMP_COLOR Color
        {
            get { return color; }
            set { color = value; }
        }


        public void SetStampStyle(int index)
        {
            switch (index)
            {
                case 1:
                    Color = C_TEXTSTAMP_COLOR.TEXTSTAMP_WHITE;
                    Shape = C_TEXTSTAMP_SHAPE.TEXTSTAMP_NONE;
                    break;
                case 2:
                    Color = C_TEXTSTAMP_COLOR.TEXTSTAMP_WHITE;
                    Shape = C_TEXTSTAMP_SHAPE.TEXTSTAMP_RECT;
                    break;
                case 3:
                    Color = C_TEXTSTAMP_COLOR.TEXTSTAMP_GREEN;
                    Shape = C_TEXTSTAMP_SHAPE.TEXTSTAMP_RECT;
                    break;
                case 4:
                    Color = C_TEXTSTAMP_COLOR.TEXTSTAMP_RED;
                    Shape = C_TEXTSTAMP_SHAPE.TEXTSTAMP_RECT;
                    break;
                case 5:
                    Color = C_TEXTSTAMP_COLOR.TEXTSTAMP_BLUE;
                    Shape = C_TEXTSTAMP_SHAPE.TEXTSTAMP_RECT;
                    break;
                case 6:
                    Color = C_TEXTSTAMP_COLOR.TEXTSTAMP_GREEN;
                    Shape = C_TEXTSTAMP_SHAPE.TEXTSTAMP_LEFT_TRIANGLE;
                    break;
                case 7:
                    Color = C_TEXTSTAMP_COLOR.TEXTSTAMP_RED;
                    Shape = C_TEXTSTAMP_SHAPE.TEXTSTAMP_LEFT_TRIANGLE;
                    break;
                case 8:
                    Color = C_TEXTSTAMP_COLOR.TEXTSTAMP_BLUE;
                    Shape = C_TEXTSTAMP_SHAPE.TEXTSTAMP_LEFT_TRIANGLE;
                    break;
                case 9:
                    Color = C_TEXTSTAMP_COLOR.TEXTSTAMP_GREEN;
                    Shape = C_TEXTSTAMP_SHAPE.TEXTSTAMP_RIGHT_TRIANGLE;
                    break;
                case 10:
                    Color = C_TEXTSTAMP_COLOR.TEXTSTAMP_RED;
                    Shape = C_TEXTSTAMP_SHAPE.TEXTSTAMP_RIGHT_TRIANGLE;
                    break;
                case 11:
                    Color = C_TEXTSTAMP_COLOR.TEXTSTAMP_GREEN;
                    Shape = C_TEXTSTAMP_SHAPE.TEXTSTAMP_RIGHT_TRIANGLE;
                    break;
                default:
                    break;
            }
            UpDataStamp();
        }

        public CustomCreateDialogViewModel()
        {
            CancelCommand = new DelegateCommand(Cancel);
            CreateCommnad = new DelegateCommand(Create);
            UpDataDynamicCommnad = new DelegateCommand(UpDataStamp);
            KeyDown = new DelegateCommand<object>(PreviewKeyDown);
        }
        private void Cancel()
        {
            RequestClose.Invoke(new DialogResult(ButtonResult.Cancel));
        }

        private void Create()
        {

        }

        public bool CanCloseDialog()
        {
            return true; 
        }

        public void OnDialogClosed()
        {
            return;
        }
        private void PreviewKeyDown(object e)
        {
            var args = e as KeyEventArgs;
            if (args == null)
            {
                return;
            }
            if (args.Key == Key.Enter)
            {
                StampText = (args.OriginalSource as TextBox).Text;
                UpDataStamp();
            }
        }
        private void UpDataStamp()
        {
            string date = "";
            string dateType = "";
            if (IsCheckedDate)
            {
                dateType = "yyyy-MM-dd";
            }
            if (IsCheckedTime)
            {
                dateType= dateType+ " HH:mm:ss";
            }
            if (!String.IsNullOrEmpty(dateType))
            {
                date = DateTime.Now.ToString(dateType);
            }
            
            var bytes = CPDFStampAnnotation.GetTempTextStampImage(StampText, date,
            Shape, Color, out int stampWidth, out int stampHeight, out int width, out int height);
            if (bytes.Length > 0)
            {
                PixelFormat fmt = PixelFormats.Bgra32;
                BitmapSource bps = BitmapSource.Create(width, height, 96, 96, fmt, null, bytes, (width * fmt.BitsPerPixel + 7) / 8);
                ImageSource = bps;
            }
            else
            {
                ImageSource = null;
            }
        }
        public void OnDialogOpened(IDialogParameters parameters)
        {
            UpDataStamp();
            return;
        }
    }
}