WPF实现WORD 2013墨迹批注功能

原文: WPF实现WORD 2013墨迹批注功能

1 前言

        WORD 2013可以使用墨迹在文档上面标注,本文讲述通过WPF第三方控件实现类似主要功能如下:

        

名称 描述
墨迹标注 不论是否触摸屏环境下可以开始墨迹功能,并实现鼠标/触摸在文档任意位置绘制痕迹
墨迹痕迹保存 绘制的墨迹能够完整在word中保存
墨迹参数设置 设置墨迹的颜色和线条粗细
墨迹擦除 提供擦除工具,可以擦除已经绘制的墨迹

 

2 环境及三方组件

名称 描述
DevExpress V16.2 使用其RichEditor控件作为word文档查看和编辑控件
Aspose.Word 在保存word文档时,调整墨迹痕迹的一些属性
.NetFrameWork 4.5 .net运行库环境

 

3 实现思路

        首先来看一下word中如何开启墨迹。这个就要说微软不地道了,微软规定了只有在触摸屏的windows环境下才会默认显示墨迹按钮,使用鼠标的就默认不显示,当然我们也可以在选项中强制加上,然后没有啥用,因为使用鼠标的用户会发现“开始墨迹书写”按钮是灰色的,而触屏下是可用的,如下图。

WPF实现WORD 2013墨迹批注功能_第1张图片

        我们先摒弃这个梗不说,为什么要自己开发一个墨迹功能呢,可能是因为office太贵了,一般客户买不起或者不想买,于是就要开发一个包含word基本功能的替代品,也有可能是我们开发软性时候需要集成word类似的功能,或者其他种种原因,所以还是决定自己开发(模仿)一个word的墨迹功能。废话少说,下面来一步一步的分析和设计墨迹功能实现思路。

        首先,我找到一个在触摸屏上面写好一些文字的文档,在非触摸屏电脑上打开,选中墨迹,这时候工具栏中“图片”选项卡被激活了,可见所谓的“墨迹”实际上只是将手写痕迹保存为类似图片存储起来了,如下图。

 

WPF实现WORD 2013墨迹批注功能_第2张图片

WPF实现WORD 2013墨迹批注功能_第3张图片

        总结一下,墨迹保存为图片的主要属性有这样:

        1.允许重叠(好像默认插入图片是不允许重叠的)

        2.绝对位置(应该是左上角的坐标位置吧)

        3.浮于文字上方(这个肯定的,避免扰乱文字布局)

 

        有了这些属性,我大胆设想如果我使用电子手写板插件,将手写痕迹保存下来,然后赋予这些属性,应该也可以达到墨迹的效果。

        现在到了框架选型的阶段,首先我需要一个能够打开和编辑word的UI组件,然后我还需要一个电子手写板插件,最后将他们组合起来。这里我选择了DEV V1.6.2 的WPF版本和WPF的InkCanvas组件,这俩我都在实际中用过,比较熟悉。

        打开DEV自带的Demo,很容易就看到了word的演示,代码也很简单,如下图。

WPF实现WORD 2013墨迹批注功能_第4张图片

        下一步要做的就是将这个组件和InkCanvas结合起来,通过点击某个按钮触发InkCanvas覆盖到文档上面,然后再使用某个按钮事件触发将InkCanvas关闭或者隐藏掉,同时获取InkCanvas的痕迹保存为图片,再插入到文档指定位置就好了。详细实现代码参考第4部分。

4 主要代码

        先看看UI部分的布局,将InkCanvas嵌入到Dev的word文档组件中。

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                 < Grid  x:Name = "mainGrid" >
                     < dxre:RichEditControl  x:Name = "richEditControl1"  BarManager = "{Binding ElementName=barManager1, Mode=OneTime}"  Ribbon="{Binding 
                     ElementName = ribbonControl1 Mode = OneTime }"   MouseMove = "richEditControl1_MouseMove"   MouseLeave = "RichEditControl1_OnMouseLeave" 
                     MouseUp = "richEditControl1_MouseUp"  />
                     < InkCanvas  x:Name = "mainCanvas"  Visibility = "Hidden" >
                         < InkCanvas.DefaultDrawingAttributes >
                             < DrawingAttributes  Color = "Red"  FitToCurve = "True"  Height = "4"  IgnorePressure = "False"  IsHighlighter = "False" 
                             StylusTip = "Ellipse"  StylusTipTransform = "Identity"  Width = "4" />
                         InkCanvas.DefaultDrawingAttributes >
                         < InkCanvas.Background >
                             < SolidColorBrush  Color = "White"  Opacity = "0.01" />
                         InkCanvas.Background >
                     InkCanvas >
                 Grid >

WPF实现WORD 2013墨迹批注功能_第5张图片

        这一部分除了红框中的,其他的都是直接copy的DEV官方demo中的,红框的目的也是将手写板控件放置在文档内容页上面,默认是隐藏的,需要的时候再代码控制显示就好。

        现在先弄俩按钮,“开始批注”和“停止批注”,来触发和停止墨迹功能。

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     < dxr:RibbonPage  x:Name = "penPage"  Caption = "批注" >
                             < dxr:RibbonPageGroup  x:Name = "penEvent"  Caption = "画笔"  ShowCaptionButton = "False" >
                                 < dxb:BarButtonItem  x:Name = "startPenItem"  LargeGlyph = "pack://application:,,,/Resources/pen.png"   GlyphSize="L
                                 arge"  Content = "开始批注" />
                                 < dxb:BarButtonItem   x:Name = "endPenItem"  LargeGlyph = "pack://application:,,,/Resources/pen_red.png"  GlyphSize="
                                 Large"  Content = "停止批注"  IsEnabled = "False" />
                                 < dxb:BarButtonItem   x:Name = "eraserItem"  LargeGlyph = "pack://application:,,,/Resources/eraser.png"  GlyphSize="
                                 Large"  Content = "擦除"  IsEnabled = "True" />
                             dxr:RibbonPageGroup >
                             < dxr:RibbonPageGroup  x:Name = "penSetting"  Caption = "画笔设置"  ShowCaptionButton = "False" >
 
                                 < dxre:BarSplitButtonColorEditItem  x:Name = "penColor"  Content = "画笔颜色"  LargeGlyph="pack://application:,,,
                                 /Resources/pallet.png"  RibbonStyle = "Large"  IsEnabled = "False" >
                                     < dxb:PopupControlContainerInfo >
                                         < dxe:ColorEdit  ChipSize = "Large"  Name = "penColorEdit"  ChipMargin = "5"  ColumnCount = "5"  
                                         ShowMoreColorsButton = "False"  ShowDefaultColorButton = "False"  ShowNoColorButton = "True" 
                                         ShowBorder = "False" >
                                             < dxe:ColorEdit.Palettes >
                                                 < dxre:CharactersBackgroundColorPaletteCollection />
                                             dxe:ColorEdit.Palettes >
                                         dxe:ColorEdit >
                                     dxb:PopupControlContainerInfo >
                                 dxre:BarSplitButtonColorEditItem >
 
                                 < dxre:BarSplitButtonEditItem  x:Name = "penLine"  Content = "画笔线宽"  LargeGlyph = "Resources/penline.png"  IsEnab
                                 led = "False" >
                                     < dxb:PopupControlContainerInfo  x:Name = "cccc" >
                                         < dxe:ListBoxEdit  Name = "penLineEdit"  ShowBorder = "False"  ShowCustomItems = "False" >
                                             < dxe:ListBoxEditItem  Content = "1" />
                                             < dxe:ListBoxEditItem  Content = "2" />
                                             < dxe:ListBoxEditItem  Content = "3" />
                                             < dxe:ListBoxEditItem  Content = "4" />
                                             < dxe:ListBoxEditItem  Content = "5" />
                                             < dxe:ListBoxEditItem  Content = "6" />
                                             < dxe:ListBoxEditItem  Content = "7" />
                                             < dxe:ListBoxEditItem  Content = "8" />
                                             < dxe:ListBoxEditItem  Content = "9" />
                                             < dxe:ListBoxEditItem  Content = "10" />
                                             < dxe:ListBoxEditItem  Content = "12" />
                                             < dxe:ListBoxEditItem  Content = "14" />
                                         dxe:ListBoxEdit >
                                     dxb:PopupControlContainerInfo >
                                 dxre:BarSplitButtonEditItem >
                             dxr:RibbonPageGroup >
                         dxr:RibbonPage >

        这个直接在界面上面增加一个“dxr:RibbonPage ”就可以了,里面增加对应的按钮和一些设置项目。

        下面是开始批注代码。

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         public  class  StartPenCommand : System.Windows.Input.ICommand
     {
         public  event  EventHandler CanExecuteChanged;
 
         public  bool  CanExecute( object  parameter)
         {
             return  true ;
         }
 
         public  void  Execute( object  parameter)
         {
             MainWindow window = parameter  as  MainWindow;
             window.StartPen( true );
         }
     }
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         /// 
         /// 开始批注
         /// 
         /// 
         public  void  StartPen( bool  start)
         {
             this .richEditControl1.ActiveView.ZoomFactor = 1;
 
             startPenItem.IsEnabled = !start;
             endPenItem.IsEnabled = start;
             eraserItem.IsEnabled = !start;
             penColor.IsEnabled = start;
             penLine.IsEnabled = start;
             var  cursor=  new  Cursor( new  MemoryStream(Resource.MetroBusy));
             if  (!start)
                 this .mainCanvas.Cursor = cursor;
 
             this .mainCanvas.Visibility = start ? Visibility.Visible : Visibility.Hidden;
         }

        停止批注代码。

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         public  class  EndPenCommand : System.Windows.Input.ICommand
     {
         public  event  EventHandler CanExecuteChanged;
 
         public  bool  CanExecute( object  parameter)
         {
             return  true ;
         }
 
         public  void  Execute( object  parameter)
         {
             MainWindow window = parameter  as  MainWindow;
             window.StartPen( false );
         }
     }

        然后是一个监听,在InkCanvas痕迹绘制就在对应文档增加一笔痕迹。

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                         //画笔绘制事件
             this .mainCanvas.StrokeCollected += (s, o) =>
             {
                 Stroke item =  new  Stroke()
                 {
                     Color = lineColor,
                     LineWidth = lineWidth,
                     Points =  new  List< float []>()
                 };
 
                 System.Windows.Ink.Stroke stroke = mainCanvas.Strokes[0];
 
                 for  ( int  i = 0; i < stroke.Clone().StylusPoints.Count; i++)
                 {
                     var  pt = stroke.StylusPoints[i];
                     item.Points.Add( new  float [2] { ( float )pt.X, ( float )pt.Y });
                 }
                 mainCanvas.Strokes.Clear();
 
                 DrawStroke(item);
             };
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/// 
         /// 绘制痕迹
         /// 
         /// 
         private  void  DrawStroke(Stroke stroke)
         {
             if  (stroke.Points.Count < 3)
                 return ;
 
             float  minX =  float .MaxValue;
             float  maxX = 0;
             float  minY =  float .MaxValue;
             float  maxY = 0;
 
             float  width = 0;
             float  height = 0;
 
             for  ( int  i = 0; i < stroke.Points.Count; i++)
             {
                 var  pt = stroke.Points[i];
                 if  (pt[0] < minX)
                     minX = pt[0];
                 if  (pt[0] > maxX)
                     maxX = pt[0];
                 if  (pt[1] < minY)
                     minY = pt[1];
                 if  (pt[1] > maxY)
                     maxY = pt[1];
             }
 
             width = maxX - minX;
             height = maxY - minY;
 
             Bitmap bmp =  new  Bitmap(( int )width + stroke.LineWidth+10, ( int )height + stroke.LineWidth+10);
             Graphics g = Graphics.FromImage(bmp);
             g.SmoothingMode = SmoothingMode.HighQuality;
 
             Pen pen =  new  Pen(System.Drawing.Color.FromArgb(255, stroke.Color.R, stroke.Color.G, stroke.Color.B),
                 stroke.LineWidth);
 
             System.Drawing.PointF[] points =  new  System.Drawing.PointF[stroke.Points.Count];
             for  ( int  i = 0; i < stroke.Points.Count; i++)
             {
                 var  pt = stroke.Points[i];
                 //var pt2 = stroke.Points[i + 1];
 
                 var  x1 = ( float )(pt[0] - minX + stroke.LineWidth);
                 var  y1 = ( float )(pt[1] - minY + stroke.LineWidth);
                 //var x2 = (float)(pt2[0] - minX);
                 //var y2 = (float)(pt2[1] - minY);
 
                 //g.DrawLine(pen, x1, y1, x2, y2);
 
                 points[i] = ( new  PointF(x1, y1));
             }
 
             g.DrawCurve(pen, points);
 
             //标注起点坐标
             var  startPoint =  this .mainCanvas.PointToScreen( new  System.Windows.Point(minX, minY));
             //标注起点坐标相对于文本控件的位置
             var  editPoint =  this .richEditControl1.PointFromScreen(startPoint);
 
             //总页码
             int  pageCount = ((DevExpress.XtraRichEdit.PageBasedRichEditView)richEditControl1.ActiveView).PageCount;
 
             是否有分页符
             //bool hasPageBlock = false;
             //for (int i = 0; i < pageCount; i++)
             //{
             //    LayoutPage layoutPage = this.richEditControl1.DocumentLayout.GetPage(i);
             //    if (!hasPageBlock)
             //    {
             //        hasPageBlock = layoutPage.PageAreas.FirstOrDefault().Columns.Any(x => x.Rows.Any(y => y.Boxes.Any(z => z.Type == LayoutType.PageBreakBox)));
             //        break;
             //    }
             //}
 
             //获取当前可见页
             var  pageInfos = richEditControl1.ActiveView.GetVisiblePageLayoutInfos();
             foreach  (PageLayoutInfo pageInfo  in  pageInfos)
             {
                 if  (pageInfo.Bounds.Y > (-1) * pageInfo.Bounds.Height)
                 {
 
                     //画笔起点是否在当前可见页
                     if  (editPoint.X >= pageInfo.Bounds.X && editPoint.X <= pageInfo.Bounds.X + pageInfo.Bounds.Width &&
                         editPoint.Y >= pageInfo.Bounds.Y && editPoint.Y <= pageInfo.Bounds.Y + pageInfo.Bounds.Height)
                     {
 
                         //当前可见页
                         int  pageIndex = pageInfo.PageIndex;
                         LayoutPage layoutPage =  this .richEditControl1.DocumentLayout.GetPage(pageIndex);
 
                         DocumentPosition documentPosition;
                         if  (layoutPage.MainContentRange.Length == 1 && pageIndex == pageCount - 1)
                         {
                             //最后一页,且是分页符空白页
                             documentPosition =
                                   this .richEditControl1.Document.CreatePosition(
                                       layoutPage.MainContentRange.Start + 1);
                             DocumentRange documentRange =
                                 this .richEditControl1.Document.CreateRange(documentPosition, 1);
                             this .richEditControl1.Document.InsertDocumentContent(documentPosition, documentRange);
                             documentPosition = documentRange.End;
 
                             this .richEditControl1.Document.Delete(documentRange);
                         }
                         else
                         {
                             documentPosition =
                                 this .richEditControl1.Document.CreatePosition(layoutPage.MainContentRange.Start +
                                                                               layoutPage.MainContentRange.Length / 2);
                         }
 
                         //if (layoutPage.PageAreas.FirstOrDefault().Columns.Any(x => x.Rows.Any(y => y.Boxes.Any(z => z.Type == LayoutType.PageBreakBox))))
                         //if (this.richEditControl1.Document.HtmlText.Contains("cs1B16EEB5"))
 
                         /*if (hasPageBlock)
                         {
                             //有分页符
                             
 
                             if (pageIndex >0)
                             {
                                 LayoutPage preLayoutPage = this.richEditControl1.DocumentLayout.GetPage(pageIndex - 1);
                                 if (
                                     !preLayoutPage.PageAreas.FirstOrDefault().Columns.Any(x =>x.Rows.Any(y => y.Boxes.Any(z => z.Type == LayoutType.PageBreakBox))))
                                 {
                                     //前一页没有分页符
                                     documentPosition =
                                          this.richEditControl1.Document.CreatePosition(layoutPage.MainContentRange.Start);
                                 }
                                 else
                                 {
                                     //前一页有分页符
                                     documentPosition =
                                    this.richEditControl1.Document.CreatePosition(
                                        layoutPage.MainContentRange.Start);
                                     DocumentRange documentRange =
                                         this.richEditControl1.Document.CreateRange(documentPosition, 1);
                                     this.richEditControl1.Document.InsertDocumentContent(documentPosition, documentRange);
                                     documentPosition = documentRange.End;
 
                                     this.richEditControl1.Document.Delete(documentRange); 
                                 }
                             }
                             else
                             {
                                 documentPosition =
                                     this.richEditControl1.Document.CreatePosition(layoutPage.MainContentRange.Start);
                             }
 
                             //if (pageIndex == pageCount - 1)
                             //{
                             //    //if (!layoutPage.PageAreas.FirstOrDefault().Columns.Any(x => x.Rows.Any(y => y.Boxes.Any(z=>z.Type == 
                             LayoutType.ParagraphMarkBox))))
                             //    //{
                             //    //    DocumentRange documentRange = this.richEditControl1.Document.CreateRange(documentPosition, 1);
                             //    //    this.richEditControl1.Document.InsertDocumentContent(documentPosition, documentRange);
                             //    //    documentPosition = documentRange.End;
 
                             //    //    this.richEditControl1.Document.Delete(documentRange);
                             //    //}
                             //    documentPosition =
                             //        this.richEditControl1.Document.CreatePosition(layoutPage.MainContentRange.Start +
                             //                                                      
                             layoutPage.MainContentRange.Length);
                             //    DocumentRange documentRange =
                             //        this.richEditControl1.Document.CreateRange(documentPosition, 1);
                             //    this.richEditControl1.Document.InsertDocumentContent(documentPosition, documentRange);
                             //    documentPosition = documentRange.End;
 
                             //    this.richEditControl1.Document.Delete(documentRange);
                             //}
                             //else
                             //{
                             //    documentPosition = this.richEditControl1.Document.CreatePosition(layoutPage.MainContentRange.Start);
                             //}
                         }
                         else
                         {
                             //无分页符
                             documentPosition = this.richEditControl1.Document.CreatePosition(layoutPage.MainContentRange.Start);
 
                             
                         }*/
 
                         var  focusControl = richEditControl1.FocusElement;
                         var  controls = GetCanvasControls(focusControl);
 
                         //根据相对位置坐标绘制图片
                         foreach  (FrameworkElement box  in  controls)
                         {
                             Console.WriteLine(box.Name);
                             if  (box.Name ==  "SuperRoot" )
                             {
                                 if  (box.ActualHeight == 0)
                                 {
 
                                 }
                                 else
                                 {
                                     Canvas canva = box  as  Canvas;
                                     var  point = box.GetPosition( this .richEditControl1);
                                     if  (point.Y > (-1) * canva.ActualHeight && point.Y < canva.ActualHeight)
                                     {
                                         try
                                         {
                                             System.Windows.Point gridPoint = canva.PointFromScreen(startPoint);
 
                                             if  (gridPoint.Y < canva.ActualHeight && gridPoint.Y > 0 &&
                                                 gridPoint.X < canva.ActualWidth && gridPoint.X > 0)
                                             {
                                                 Shape shape =
                                                     this .richEditControl1.Document.InsertPicture(documentPosition, bmp);
                                                 shape.TextWrapping = TextWrappingType.InFrontOfText;
                                                 shape.HorizontalAlignment = ShapeHorizontalAlignment.None;
 
                                                 //shape.RelativeHorizontalPosition = ShapeRelativeHorizontalPosition.Column;
                                                 //shape.RelativeVerticalPosition = ShapeRelativeVerticalPosition.Paragraph;
                                                 shape.ZOrder = zIndex;
                                                 zIndex++;
 
                                                 shape.Name =  "penLink" ;
 
                                                 shape.Offset =  new  PointF(( float )((gridPoint.X - stroke.LineWidth) * 3.12),
                                                     ( float )((gridPoint.Y - stroke.LineWidth) * 3.12));
 
 
 
                                                 break ;
                                             }
                                         }
                                         catch  (Exception ex)
                                         {
 
                                         }
                                     }
 
 
                                 }
                             }
                         }
                         break ;
                     }
                 }
             }
         }

 

 

 

 

5 总结

        最终实现效果如下图。

WPF实现WORD 2013墨迹批注功能_第6张图片

 

源码和更多资源请访问:http://88gis.cn/web/pages/blog/blogInfo.html?id=95e5139d-5dcc-4600-bcca-355ae6ac8a8f

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