prs/prs.desktop/Panels/DataEntry/DocumentPage.xaml.cs

using netDxf.Units;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace PRSDesktop.Panels.DataEntry
{
    /// <summary>
    /// Interaction logic for DocumentPage.xaml
    /// </summary>
    public partial class DocumentPage : UserControl, INotifyPropertyChanged
    {
        public DocumentManipulationWindow.Page Page { get; set; }

        private static readonly Brush SelectedBorderBrush = new SolidColorBrush(Colors.LightBlue);
        private static readonly Brush SelectedBackgroundBrush = new SolidColorBrush(new Color
        {
            A = 128,
            R = Colors.LightBlue.R,
            G = Colors.LightBlue.G,
            B = Colors.LightBlue.B,
        });

        private static readonly Brush TransparentBrush = new SolidColorBrush(Colors.Transparent);

        public Brush SelectionBorder => Selected ? SelectedBorderBrush : TransparentBrush;
        public Brush SelectionBackground => Selected ? SelectedBackgroundBrush : TransparentBrush;

        private bool selected;
        public bool Selected
        {
            get => selected;
            set
            {
                selected = value;
                OnPropertyChanged(nameof(SelectionBorder));
                OnPropertyChanged(nameof(SelectionBackground));
                OnSelected?.Invoke(this, Selected);
            }
        }

        public delegate void OnSelectedHandler(DocumentPage page, bool selected);
        public event OnSelectedHandler? OnSelected;

        public DocumentPage(DocumentManipulationWindow.Page page)
        {
            Page = page;

            InitializeComponent();
        }

        public event PropertyChangedEventHandler? PropertyChanged;

        public void OnPropertyChanged([CallerMemberName] string name = "")
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(name));
        }

        private void Border_MouseDown(object sender, MouseButtonEventArgs e)
        {
            Selected = !Selected;
        }
    }
}