using System.ComponentModel;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media.Imaging;

namespace ScreenToGif.Controls
{
    /// <summary>
    /// Frame viewer that works with a WriteableBitmap.
    /// </summary>
    public class FrameViewer : Control
    {
        //UI
        //Image scale difference with screen scale.
        //Zoom.
        //Mouse and keyboard events.
        //Check if rendering works.
        
        #region Properties

        public static readonly DependencyProperty SourceProperty = DependencyProperty.Register(nameof(Source), typeof(WriteableBitmap), typeof(FrameViewer), 
            new FrameworkPropertyMetadata(null, FrameworkPropertyMetadataOptions.AffectsRender, Source_PropertyChanged));

        public static readonly DependencyProperty ZoomProperty = DependencyProperty.Register(nameof(Zoom), typeof(double), typeof(FrameViewer), 
            new FrameworkPropertyMetadata(1d, FrameworkPropertyMetadataOptions.AffectsRender, Zoom_PropertyChanged));


        /// <summary>
        /// The source image.
        /// </summary>
        [Description("The source image.")]
        public WriteableBitmap Source
        {
            get => (WriteableBitmap)GetValue(SourceProperty);
            set => SetValue(SourceProperty, value);
        }

        /// <summary>
        /// The zoom level of the image.
        /// </summary>
        [Description("The zoom level of the image.")]
        public double Zoom
        {
            get => (double)GetValue(ZoomProperty);
            set => SetCurrentValue(ZoomProperty, value);
        }



        #endregion

        static FrameViewer()
        {
            DefaultStyleKeyProperty.OverrideMetadata(typeof(FrameViewer), new FrameworkPropertyMetadata(typeof(FrameViewer)));
        }


        private static void Source_PropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            //When the image source changes, the UI needs to be adjusted somewhow.
        }

        private static void Zoom_PropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {

        }
    }
}