WPF实现WORD 2013墨迹批注功能

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WPF实现WORD 2013墨迹批注功能

馨语随风飞 2018-07-09 14:34:00 浏览644
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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。

        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。

 

        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。

        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=ribbonControl1Mode=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>

        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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        /// <summary>
        /// 开始批注
        /// </summary>
        /// <param name="start"></param>
        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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/// <summary>
        /// 绘制痕迹
        /// </summary>
        /// <param name="stroke"></param>
        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。

 

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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