LunarPresentation/Adorners/CollapsedAdorner.cs

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using System.Collections.Generic;
using System.Windows;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;

namespace SHomeWorkshop.LunarPresentation.Adorners
{
    /// <summary>
    /// 文本块的折叠标记。
    /// </summary>
    public class CollapsedAdorner : Adorner
    {
        /// <summary>
        /// 文本块的折叠标记。
        /// </summary>
        /// <param name="adornedElement">应传入文本块。</param>
        public CollapsedAdorner(Expressions.BaseText adornedElement)
            : base(adornedElement)
        {
            //终于解决了选取装饰器中线条宽度为2而不是1像素的问题！！！
            this.SnapsToDevicePixels = true;
            this.SetValue(RenderOptions.EdgeModeProperty, EdgeMode.Aliased);

            this.masterBt = adornedElement;

            this.Cursor = Cursors.Hand;
            this.ToolTip = CollapsedAdorner.CustomToolTip;

            this.MouseLeftButtonDown += new MouseButtonEventHandler(CollapsedAdorner_MouseLeftButtonDown);
            this.MouseLeftButtonUp += new MouseButtonEventHandler(CollapsedAdorner_MouseLeftButtonUp);
            this.MouseRightButtonDown += new MouseButtonEventHandler(CollapsedAdorner_MouseRightButtonDown);

            this.MouseEnter += new MouseEventHandler(CollapsedAdorner_MouseEnter);
            this.MouseLeave += new MouseEventHandler(CollapsedAdorner_MouseLeave);
        }

        public static readonly string CustomToolTip = "折叠/展开";

        void CollapsedAdorner_MouseRightButtonDown(object sender, MouseButtonEventArgs e)
        {
            if (masterBt != null && masterBt.Editor != null)
            {
                if (masterBt.Editor.SelectedExpression != masterBt)
                {
                    masterBt.Editor.SelectedExpression = masterBt;
                }
            }

            e.Handled = true;
        }

        void CollapsedAdorner_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
        {
            //完成拖动。
            Globals.DropExpression(this.masterBt);
        }

        void CollapsedAdorner_MouseLeave(object sender, MouseEventArgs e)
        {