MTP2.0_CSharp/Muchinfo.Common/Fx4.0/Muchinfo.ChartClient/MuchInfo.Chart/MuchInfo.Chart.WPF/Controls/Drawing/DrawingPointGrab.xaml.cs

using MuchInfo.Chart.Data.EnumTypes;
using MuchInfo.Chart.WPF.Primitives.Interfaces;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media;

namespace MuchInfo.Chart.WPF.Controls.Drawing
{
    /// <summary>
    /// DrawingPointGrab.xaml 的交互逻辑
    /// </summary>
    public partial class DrawingPointGrab : UserControl
    {
        #region Fields

        private Chart _chart;
        private IDrawingTool _drawingTool;
        private bool _flag;
        private bool _isMouseEnter;
        private int _pointIndex;

        #endregion Fields

        #region Constructors

        //private bool DrawingPointGrab_846;
        public DrawingPointGrab()
        {
            base.MouseEnter -= (new MouseEventHandler(this.theBorder_MouseEnter));
            base.MouseEnter += (new MouseEventHandler(this.theBorder_MouseEnter));
            base.LostMouseCapture -= (new MouseEventHandler(this.DrawingPointGrab_LostMouseCapture));
            base.LostMouseCapture += (new MouseEventHandler(this.DrawingPointGrab_LostMouseCapture));
            base.MouseLeave -= (new MouseEventHandler(this.theBorder_MouseLeave));
            base.MouseLeave += (new MouseEventHandler(this.theBorder_MouseLeave));
            base.MouseLeftButtonDown -= (new MouseButtonEventHandler(this.theBorder_MouseLeftButtonDown));
            base.MouseLeftButtonDown += (new MouseButtonEventHandler(this.theBorder_MouseLeftButtonDown));
            base.MouseLeftButtonUp -= (new MouseButtonEventHandler(this.theBorder_MouseLeftButtonUp));
            base.MouseLeftButtonUp += (new MouseButtonEventHandler(this.theBorder_MouseLeftButtonUp));
            base.MouseMove -= (new MouseEventHandler(this.theBorder_MouseMove));
            base.MouseMove += (new MouseEventHandler(this.theBorder_MouseMove));
            this._isMouseEnter = false;
            this._flag = false;
            this.InitializeComponent();
        }

        #endregion Constructors

        #region Methods

        #region Public Methods

        public void Setup(IDrawingTool tool, int pointIndex, Chart chart)
        {
            this.Cursor = Cursors.Hand;
            this._drawingTool = tool;
            this._pointIndex = pointIndex;
            this._chart = chart;
            this.Arrows.Visibility = Visibility.Collapsed;
            this.LayoutRoot.BorderBrush = (new SolidColorBrush(Colors.Transparent));
            bool isDarkBackground = this._chart.IsDarkBackground;
            if (isDarkBackground)
            {
                this.dot.Stroke = (new SolidColorBrush(Color.FromArgb(150, 255, 255, 255)));
            }
            else
            {
                this.dot.Stroke = (new SolidColorBrush(Color.FromArgb(150, 0, 0, 0)));
            }
        }

        #endregion Public Methods

        #region Internal Methods

        internal void ShowPointGrab()
        {
            Point point = this._drawingTool[this._pointIndex];
            this.ShowPointGrab(point.X, point.Y);
        }

        #endregion Internal Methods

        #region Private Methods

        private void UpdateStroke()
        {
            if (this._isMouseEnter || this._flag)
            {
                this.Arrows.Visibility = Visibility.Visible;
                if (this._chart.IsDarkBackground)
                {
                    this.dot.Stroke = (new SolidColorBrush(Color.FromArgb(255, 255, 255, 255)));
                    this.L1.Stroke = (new SolidColorBrush(Colors.Yellow));
                }
                else
                {
                    this.dot.Stroke = (new SolidColorBrush(Color.FromArgb(255, 0, 0, 0)));
                    this.L1.Stroke = (new SolidColorBrush(Colors.Blue));
                }
                this.L2.Stroke = this.L1.Stroke;
                this.L3.Stroke = this.L1.Stroke;
                this.L4.Stroke = this.L1.Stroke;
            }
            else
            {
                this.dot.Stroke = this._chart.IsDarkBackground ? new SolidColorBrush(Color.FromArgb(150, 255, 255, 255)) :
                    new SolidColorBrush(Color.FromArgb(150, 0, 0, 0));
                this.Arrows.Visibility = Visibility.Collapsed;
            }
        }

        private FrameworkElement GetPaintAreaCanvas()
        {
            var parent = this.Parent as FrameworkElement;
            if (parent == null) return null;
            var grandparent = parent.Parent as FrameworkElement;
            if (grandparent == null) return null;
            var paintArea = grandparent.Parent as FrameworkElement;
            return paintArea;
        }

        private void UpdatePosition(MouseEventArgs e)
        {
            var paintArea = GetPaintAreaCanvas();
            if (paintArea == null) return;

            var position = e.GetPosition(paintArea);

            var x = (float)paintArea.ActualWidth;
            x = x < 0 ? 0 : x;

            var y = (paintArea.ActualHeight - 6.0);
            y = y < 0 ? 0 : y;

            position.X = position.X < 0 ? 0 : position.X;
            position.Y = position.Y < 0 ? 0 : position.Y;

            position.X = position.X > x ? x : position.X;
            position.Y = position.Y > y ? y : position.Y;

            this.ShowPointGrab(position.X, position.Y);
            this._drawingTool[this._pointIndex] = position;


            //bool flag = this.GetPaintAreaCanvas() != null && this.GetPaintAreaCanvas() is FrameworkElement;
            //if (flag)
            //{
            //    Point position = e.GetPosition((UIElement)this.GetPaintAreaCanvas());
            //    FrameworkElement frameworkElement = (FrameworkElement)this.GetPaintAreaCanvas();
            //    float num = (float)(frameworkElement.ActualHeight - 6.0);
            //    flag = (num < 0f);
            //    if (flag)
            //    {
            //        num = 0f;
            //    }
            //    float num2 = (float)frameworkElement.ActualWidth;
            //    flag = (num2 < 0f);
            //    if (flag)
            //    {
            //        num2 = 0f;
            //    }
            //    flag = (position.X < 0.0);
            //    if (flag)
            //    {
            //        position.X = (0.0);
            //    }
            //    flag = (position.Y < 0.0);
            //    if (flag)
            //    {
            //        position.Y = (0.0);
            //    }
            //    flag = (position.X > (double)num2);
            //    if (flag)
            //    {
            //        position.X = ((double)num2);
            //    }
            //    flag = (position.Y > (double)num);
            //    if (flag)
            //    {
            //        position.Y = ((double)num);
            //    }
            //    this.ShowPointGrab(position.X, position.Y);
            //    this._drawingTool[this._pointIndex] = position;
            //}
        }

        private void DrawingPointGrab_LostMouseCapture(object sender, MouseEventArgs e)
        {
            if (this._flag)
            {
                this._flag = false;
                this._chart.LockPainting = false;
                this._chart.Refresh();
                this.UpdateStroke();
            }
        }

        private void theBorder_MouseEnter(object sender, MouseEventArgs e)
        {
            bool flag = this._chart.PointerType == PointerType.Drawing;
            if (!flag)
            {
                this._isMouseEnter = true;
                this.UpdateStroke();
            }
        }

        private void theBorder_MouseLeave(object sender, MouseEventArgs e)
        {
            this._isMouseEnter = false;
            this.UpdateStroke();
        }

        private void theBorder_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            if (this._chart.PointerType != PointerType.Drawing)
            {
                if (this._chart.PointerType == PointerType.Erase)
                {
                    this._drawingTool.Delete();
                }
                else
                {
                    this._chart.LockPainting = true;
                    this.CaptureMouse();
                    this.UpdatePosition(e);
                    this._flag = true;
                    this.UpdateStroke();
                }
            }
        }

        private void theBorder_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
        {
            bool flag = this._flag;
            if (flag)
            {
                this.ReleaseMouseCapture();
                this.UpdatePosition(e);
                flag = (this._drawingTool.OwnerSpec != null);
                if (flag)
                {
                    this._drawingTool.OwnerSpec.ToolChanged(this._drawingTool);
                }
                this._flag = false;
                this._chart.LockPainting = false;
                this._chart.Refresh();
                this.UpdateStroke();
            }
        }

        private void theBorder_MouseMove(object sender, MouseEventArgs e)
        {
            bool flag = this._chart != null && this._chart.PointerType == PointerType.Erase;
            if (flag)
            {
                this._chart.SetCursorImagePos(true, e);
            }
            flag = this._flag;
            if (flag)
            {
                this.UpdatePosition(e);
            }
        }

        private void ShowPointGrab(double aX, double aY)
        {
            this.SetValue(Canvas.LeftProperty, aX - 7.0);
            this.SetValue(Canvas.TopProperty, aY - 7.0);
            var paintArea = GetPaintAreaCanvas();
            if (paintArea == null) return;

            if (((aX - 10) > paintArea.ActualWidth) || ((aX + 10) < 0) ||
                ((aY - 10) > paintArea.ActualHeight) || ((aY + 10) < 0))
            {
                this.Visibility = Visibility.Collapsed;
                return;
            }

            this.Visibility = Visibility.Visible;
        }

        #endregion Private Methods

        #endregion Methods
    }
}