用Wpf做一个思维导图(续3-Diagram画板)

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先上一张简易效果图,本次更新主要仿照百度脑图。

同样老规矩,先上源码地址:https://gitee.com/akwkevin/aistudio.-wpf.-diagram

本次扩展主要内容:

1.思维导图、目录组织图、鱼骨头图、逻辑结构图、组织结构图,入口在文件新建下。

2.思维导图工具栏(只有思维导图模式下可见)

2.1插入链接

2.2插入图片

2.3插入备注

2.4插入优先级

2.5插入进度

2.6切换类型

2.7切换主题

2.8还要展开节点,全选,居中,适应窗体大小等功能,不在介绍。

3 添加搜索功能(不仅仅思维导图可以使用)

4接下来介绍下核心源代码(布局设置)

思维导图、目录组织图、鱼骨头图、逻辑结构图、组织结构图的布局都继承了以下接口:

  public interface IMindLayout
    
        /// <summary>
        ///  默认节点样式设置
        /// </summary>
        /// <param name="mindNode"></param>
        void Appearance(MindNode mindNode);

        /// <summary>
        ///  节点样式设置
        /// </summary>
        /// <param name="mindNode"></param>
        /// <param name="mindTheme"></param>
        /// <param name="initAppearance"></param>
        void Appearance(MindNode mindNode, MindTheme mindTheme, bool initAppearance);

        /// <summary>
        /// 连线类型设置
        /// </summary>
        /// <param name="source"></param>
        /// <param name="sink"></param>
        /// <param name="connector"></param>
        /// <returns></returns>
        ConnectionViewModel GetOrSetConnectionViewModel(MindNode source, MindNode sink, ConnectionViewModel connector = null);

        /// <summary>
        /// 更新布局
        /// </summary>
        /// <param name="mindNode"></param>
        void UpdatedLayout(MindNode mindNode);        
    

其中:UpdatedLayout包括布局丈量MeasureOverride和摆放元素ArrangeOverride,是不是感觉和重新Panel差不多,先计算每个节点占的大小,然后开始布局。下面为思维导图的源代码,其它导图的,如有兴趣请下载源代码查看。

     public SizeBase MeasureOverride(MindNode mindNode, bool isExpanded = true)
        
            var sizewithSpacing = mindNode.SizeWithSpacing;
            if (mindNode.Children?.Count > 0)
            
                if (mindNode.NodeLevel == 0)
                
                    var rights = mindNode.Children.Where((p, index) => index % 2 == 0).ToList();
                    rights.ForEach(p => p.ConnectorOrientation = ConnectorOrientation.Left);
                    var rightsizes = rights.Select(p => MeasureOverride(p, mindNode.IsExpanded && isExpanded)).ToArray();
                    var lefts = mindNode.Children.Where((p, index) => index % 2 == 1).ToList();
                    lefts.ForEach(p => p.ConnectorOrientation = ConnectorOrientation.Right);
                    var leftsizes = lefts.Select(p => MeasureOverride(p, mindNode.IsExpanded && isExpanded)).ToArray();
                    sizewithSpacing = new SizeBase(sizewithSpacing.Width + rightsizes.MaxOrDefault(p => p.Width) + +leftsizes.MaxOrDefault(p => p.Width), Math.Max(sizewithSpacing.Height, Math.Max(rightsizes.SumOrDefault(p => p.Height), leftsizes.SumOrDefault(p => p.Height))));
                
                else
                
                    var childrensizes = mindNode.Children.Select(p => MeasureOverride(p, mindNode.IsExpanded && isExpanded)).ToArray();
                    sizewithSpacing = new SizeBase(sizewithSpacing.Width + childrensizes.MaxOrDefault(p => p.Width), Math.Max(sizewithSpacing.Height, childrensizes.SumOrDefault(p => p.Height)));
                
            
            mindNode.DesiredSize = isExpanded ? sizewithSpacing : new SizeBase(0, 0);
            mindNode.Visible = isExpanded;

            return mindNode.DesiredSize;
        

        public void ArrangeOverride(MindNode mindNode)
        
            if (mindNode.NodeLevel == 0)
            
                mindNode.DesiredPosition = mindNode.Position;

                if (mindNode.Children?.Count > 0)
                
                    var rights = mindNode.Children.Where(p => p.ConnectorOrientation == ConnectorOrientation.Left).ToList();
                    double left = mindNode.DesiredPosition.X + mindNode.ItemWidth  + mindNode.Spacing.Width;
                    double lefttop = mindNode.DesiredPosition.Y + mindNode.ItemHeight / 2 - Math.Min(mindNode.DesiredSize.Height, rights.SumOrDefault(p => p.DesiredSize.Height)) / 2;
                    foreach (var child in rights)
                    
                        child.Offset = new PointBase(child.Offset.X - child.RootNode.Offset.X, child.Offset.Y - child.RootNode.Offset.Y);
                        
                        child.DesiredPosition = new PointBase(left + child.Spacing.Width, lefttop + child.DesiredSize.Height / 2 - child.ItemHeight / 2);
                        child.Left = child.DesiredPosition.X + child.Offset.X;
                        child.Top = child.DesiredPosition.Y + child.Offset.Y;
                        lefttop += child.DesiredSize.Height;

                        ArrangeOverride(child);

                        var connector = mindNode.Root?.Items.OfType<ConnectionViewModel>().FirstOrDefault(p => p.SourceConnectorInfo?.DataItem == mindNode && p.SinkConnectorInfoFully?.DataItem == child);
                        connector?.SetSourcePort(mindNode.FirstConnector);
                        connector?.SetSinkPort(child.LeftConnector);
                        connector?.SetVisible(child.Visible);
                    

                    var lefts = mindNode.Children.Where(p => p.ConnectorOrientation == ConnectorOrientation.Right).ToList();
                    double right = mindNode.DesiredPosition.X - mindNode.Spacing.Width;
                    double righttop = mindNode.DesiredPosition.Y + mindNode.ItemHeight / 2 - Math.Min(mindNode.DesiredSize.Height, lefts.SumOrDefault(p => p.DesiredSize.Height)) / 2;
                    foreach (var child in lefts)
                    
                        child.Offset = new PointBase(child.Offset.X - child.RootNode.Offset.X, child.Offset.Y - child.RootNode.Offset.Y);
                        child.DesiredPosition = new PointBase(right - child.Spacing.Width - child.ItemWidth, righttop + child.DesiredSize.Height / 2 - child.ItemHeight / 2);
                        child.Left = child.DesiredPosition.X + child.Offset.X;
                        child.Top = child.DesiredPosition.Y + child.Offset.Y;
                        righttop += child.DesiredSize.Height;

                        ArrangeOverride(child);

                        var connector = mindNode.Root?.Items.OfType<ConnectionViewModel>().FirstOrDefault(p => p.SourceConnectorInfo?.DataItem == mindNode && p.SinkConnectorInfoFully?.DataItem == child);
                        connector?.SetSourcePort(mindNode.FirstConnector);
                        connector?.SetSinkPort(child.RightConnector);
                        connector?.SetVisible(child.Visible);
                    
                
                
                mindNode.Offset = new PointBase();//修正后归0
            
            else
            
                if (mindNode.GetLevel1Node().ConnectorOrientation == ConnectorOrientation.Left)
                
                    double left = mindNode.DesiredPosition.X + mindNode.ItemWidth + mindNode.Spacing.Width;
                    double top = mindNode.DesiredPosition.Y + mindNode.ItemHeight / 2 - Math.Min(mindNode.DesiredSize.Height, mindNode.Children.SumOrDefault(p => p.DesiredSize.Height)) / 2;
                    if (mindNode.Children?.Count > 0)
                    
                        foreach (var child in mindNode.Children)
                        
                            child.Offset = new PointBase(child.Offset.X - child.RootNode.Offset.X, child.Offset.Y - child.RootNode.Offset.Y);
                            child.DesiredPosition = new PointBase(left + child.Spacing.Width, top + child.DesiredSize.Height / 2 - child.ItemHeight / 2);
                            child.Left = child.DesiredPosition.X + child.Offset.X;
                            child.Top = child.DesiredPosition.Y + child.Offset.Y;
                            top += child.DesiredSize.Height;

                            ArrangeOverride(child);

                            var connector = mindNode.Root?.Items.OfType<ConnectionViewModel>().FirstOrDefault(p => p.SourceConnectorInfo?.DataItem == mindNode && p.SinkConnectorInfoFully?.DataItem == child);
                            connector?.SetSourcePort(mindNode.RightConnector);
                            connector?.SetSinkPort(child.LeftConnector);
                            connector?.SetVisible(child.Visible);
                        
                    
                
                else
                
                    double right = mindNode.DesiredPosition.X  - mindNode.Spacing.Width;
                    double top = mindNode.DesiredPosition.Y + mindNode.ItemHeight / 2 - Math.Min(mindNode.DesiredSize.Height, mindNode.Children.SumOrDefault(p => p.DesiredSize.Height)) / 2;
                    if (mindNode.Children?.Count > 0)
                    
                        foreach (var child in mindNode.Children)
                        
                            child.Offset = new PointBase(child.Offset.X - child.RootNode.Offset.X, child.Offset.Y - child.RootNode.Offset.Y);
                            child.DesiredPosition = new PointBase(right - child.Spacing.Width - child.ItemWidth, top + child.DesiredSize.Height / 2 - child.ItemHeight / 2);
                            child.Left = child.DesiredPosition.X + child.Offset.X;
                            child.Top = child.DesiredPosition.Y + child.Offset.Y;
                            top += child.DesiredSize.Height;

                            ArrangeOverride(child);

                            var connector = mindNode.Root?.Items.OfType<ConnectionViewModel>().FirstOrDefault(p => p.SourceConnectorInfo?.DataItem == mindNode && p.SinkConnectorInfoFully?.DataItem == child);
                            connector?.SetSourcePort(mindNode.LeftConnector);
                            connector?.SetSinkPort(child.RightConnector);
                            connector?.SetVisible(child.Visible);
                        
                    
                
            


        

5 最后为了方便大家使用,我封装了一个思维脑图的控件MindEditor,可以直接绑定json格式的数据,数据改变,可以直接加载应用。(见AIStudio.Wpf.DiagramDesigner.Demo)

 

近期会持续更新,欢迎大家光临艾竹 (akwkevin) - Gitee.com,支持的朋友们,点个小星星,你们的支持能燃烧我开源的力量。

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