using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
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 RichCreator.Editor.Tools.CV
{
    /// <summary>
    /// DialogReplica.xaml 的交互逻辑
    /// </summary>
    public partial class SplitArea : UserControl
    {
        private Cursor _cursor;

        public SplitArea()
        {
            InitializeComponent();
        }

        private void OnResizeThumbDragStarted(object sender, DragStartedEventArgs e)
        {
            _cursor = Cursor;
            Cursor = Cursors.SizeNWSE;
        }

        private void OnResizeThumbDragCompleted(object sender, DragCompletedEventArgs e)
        {
            Cursor = _cursor;
        }

        private void OnResizeThumbDragDelta(object sender, DragDeltaEventArgs e)
        {
            double width = double.IsNaN(sizableContent.Width)?0:sizableContent.Width;
            double height =double.IsNaN(sizableContent.Height)?0:sizableContent.Height;

            double xAdjust = width + e.HorizontalChange;
            double yAdjust = height + e.VerticalChange;

            //make sure not to resize to negative width or heigth            
            xAdjust = xAdjust < sizableContent.MinWidth ? sizableContent.MinWidth: xAdjust ;
            yAdjust =  yAdjust < sizableContent.MinHeight ? sizableContent.MinHeight:yAdjust ;

            sizableContent.Width = xAdjust;
            sizableContent.Height = yAdjust;
        }

        private void Thumb_DragStarted(object sender, DragStartedEventArgs e)
        {
            _cursor = Cursor;
            Cursor = Cursors.Arrow;
        }

        private void Thumb_DragCompleted(object sender, DragCompletedEventArgs e)
        {
            Cursor = _cursor;
        }

        private void Thumb_DragDelta(object sender, DragDeltaEventArgs e)
        {
            double left = Canvas.GetLeft(this);
            double top = Canvas.GetTop(this);

            double xAdjust =(double.IsNaN(left)?0:left) + e.HorizontalChange;
            double yAdjust = (double.IsNaN(top)?0:top)+ e.VerticalChange;
            
            

            Canvas.SetLeft(this, xAdjust);
            Canvas.SetTop(this, yAdjust);
        }

        /// <summary>
        /// 得到控件的Rect
        /// </summary>
        /// <returns></returns>
        public Rect GetRect()
        {
            return new Rect(Canvas.GetLeft(this), Canvas.GetTop(this), this.ActualWidth, this.ActualHeight);
        }

        public event Action<SplitArea> OnClose;
        private void raiseOnClose()
        {
            if (OnClose != null)
            {
                OnClose(this);
            }
        }


        /// <summary>
        /// 关闭点击
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void Button_Click(object sender, RoutedEventArgs e)
        {
            raiseOnClose();
        }
    }
}