LunarMind/Adorners/PageAdorner.cs

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

namespace SHomeWorkshop.LunarMind.Adorners
{
    public class PageAdorner : Adorner
    {
        /// <summary>
        /// 用在整页指示标尺的装饰器。
        /// </summary>
        /// <param name="adornedElement">应传入主窗口的mainCanvas。</param>
        public PageAdorner(UIElement adornedElement)
            : base(adornedElement)
        {
            mainCanvas = adornedElement as Canvas;
            this.Opacity = 0.5;

            //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.MouseLeftButtonDown += new System.Windows.Input.MouseButtonEventHandler(PageAdorner_MouseLeftButtonDown);
        }

        void PageAdorner_MouseLeftButtonDown(object sender, System.Windows.Input.MouseButtonEventArgs e)
        {
            if (e.ClickCount == 2)
            {
                Globals.MainWindow.isPageRulerVisible = false;
                Globals.MainWindow.RefreshPageAdorner();
            }
        }

        private Canvas mainCanvas;

        protected override void OnRender(DrawingContext drawingContext)
        {
            if (Globals.MainWindow.isPageRulerVisible == false) return;

            ToolTip = "页面标尺：" + Globals.MainWindow.PageSetting.PaperTypeName + " <双击关闭>";

            #region 原页面标尺
            //Rect srcRectOfCanvas = new Rect(this.AdornedElement.RenderSize);

            //Rect pageRect;

            //if (Globals.MainWindow.PageDirection == Orientation.Horizontal)
            //{
            //    pageRect = new Rect(
            //        (srcRectOfCanvas.Width - Globals.MainWindow.PageSetting.LongSideWPFUnit) / 2,
            //        (srcRectOfCanvas.Height - Globals.MainWindow.PageSetting.ShortSideWPFUnit) / 2,
            //        Globals.MainWindow.PageSetting.LongSideWPFUnit,
            //        Globals.MainWindow.PageSetting.ShortSideWPFUnit);
            //}
            //else
            //{
            //    pageRect = new Rect(
            //        (srcRectOfCanvas.Width - Globals.MainWindow.PageSetting.ShortSideWPFUnit) / 2,