LunarMind/ConceptWidgets/Adorners/PresentationAreaAdorner.cs

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using System.Windows;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using SHomeWorkshop.LunarConcept.Enums;
using System;
using SHomeWorkshop.LunarConcept.Tools;

namespace SHomeWorkshop.LunarConcept.Adorners
{
    /// <summary>
    /// 创建时间：2016年1月
    /// 创建者：  杨震宇
    /// 
    /// 主要用途：RectangleWidget使用的标记装饰器。用于将一个矩形定义为一个演示区域。
    /// 
    /// </summary>
    public class PresentationAreaAdorner : Adorner
    {
        /// <summary>
        /// [构造方法]
        /// </summary>
        /// <param name="adornedElement">应传入RectangleWidget的Canvas。</param>
        public PresentationAreaAdorner(UIElement adornedElement, Widgets.RectangleWidget rectangleWidget)
            : base(adornedElement)
        {
            //终于解决了选定装饰器中线条宽度为2而不是1像素的问题！！！
            this.SnapsToDevicePixels = true;
            this.SetValue(TextOptions.TextFormattingModeProperty, TextFormattingMode.Display);

            this.masterRectangleWidget = rectangleWidget;

            this.Cursor = Cursors.Hand;
        }

        private Widgets.RectangleWidget masterRectangleWidget;

        public Widgets.RectangleWidget MasterRectangleWidget
        {
            get { return masterRectangleWidget; }
            set { masterRectangleWidget = value; }
        }

        public Rect MasterRect { get; internal set; }

        protected override void OnRender(DrawingContext drawingContext)
        {
            if (masterRectangleWidget == null) return;

            if (this.masterRectangleWidget.MasterEditor == null) return;

            double defFontSize = this.masterRectangleWidget.MasterEditor.DefaultFontSize;

            Typeface typeface;

            if (defFontSize > 15)
            {
                typeface = new Typeface(
                            font_YaHei,
                            FontStyles.Normal,