GoJS/samples/mindMap.html at master · xxxspy/GoJS · GitHub

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<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
  <title>Mind Map</title>
  <meta name="description" content="A mind map editor, showing how subtrees can be moved, copied, deleted, and laid out." />
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <!-- Copyright 1998-2020 by Northwoods Software Corporation. -->

  <script src="../release/go.js"></script>
  <script src="../assets/js/goSamples.js"></script>  <!-- this is only for the GoJS Samples framework -->
  <script id="code">
    function init() {
      if (window.goSamples) goSamples();  // init for these samples -- you don't need to call this
      var $ = go.GraphObject.make;

      myDiagram =
        $(go.Diagram, "myDiagramDiv",
          {
            // when the user drags a node, also move/copy/delete the whole subtree starting with that node
            "commandHandler.copiesTree": true,
            "commandHandler.copiesParentKey": true,
            "commandHandler.deletesTree": true,
            "draggingTool.dragsTree": true,
            "undoManager.isEnabled": true
          });

      // when the document is modified, add a "*" to the title and enable the "Save" button
      myDiagram.addDiagramListener("Modified", function(e) {
        var button = document.getElementById("SaveButton");
        if (button) button.disabled = !myDiagram.isModified;
        var idx = document.title.indexOf("*");
        if (myDiagram.isModified) {
          if (idx < 0) document.title += "*";
        } else {
          if (idx >= 0) document.title = document.title.substr(0, idx);
        }
      });

      // a node consists of some text with a line shape underneath
      myDiagram.nodeTemplate =
        $(go.Node, "Vertical",
          { selectionObjectName: "TEXT" },
          $(go.TextBlock,
            {
              name: "TEXT",
              minSize: new go.Size(30, 15),
              editable: true
            },
            // remember not only the text string but the scale and the font in the node data
            new go.Binding("text", "text").makeTwoWay(),
            new go.Binding("scale", "scale").makeTwoWay(),
            new go.Binding("font", "font").makeTwoWay()),
          $(go.Shape, "LineH",
            {
              stretch: go.GraphObject.Horizontal,
              strokeWidth: 3, height: 3,
              // this line shape is the port -- what links connect with
              portId: "", fromSpot: go.Spot.LeftRightSides, toSpot: go.Spot.LeftRightSides
            },
            new go.Binding("stroke", "brush"),
            // make sure links come in from the proper direction and go out appropriately
            new go.Binding("fromSpot", "dir", function(d) { return spotConverter(d, true); }),
            new go.Binding("toSpot", "dir", function(d) { return spotConverter(d, false); })),
          // remember the locations of each node in the node data
          new go.Binding("location", "loc", go.Point.parse).makeTwoWay(go.Point.stringify),
          // make sure text "grows" in the desired direction
          new go.Binding("locationSpot", "dir", function(d) { return spotConverter(d, false); })
        );

      // selected nodes show a button for adding children
      myDiagram.nodeTemplate.selectionAdornmentTemplate =
        $(go.Adornment, "Spot",
          $(go.Panel, "Auto",
            // this Adornment has a rectangular blue Shape around the selected node
            $(go.Shape, { fill: null, stroke: "dodgerblue", strokeWidth: 3 }),
            $(go.Placeholder, { margin: new go.Margin(4, 4, 0, 4) })
          ),
          // and this Adornment has a Button to the right of the selected node
          $("Button",
            {
              alignment: go.Spot.Right,
              alignmentFocus: go.Spot.Left,
              click: addNodeAndLink  // define click behavior for this Button in the Adornment
            },
            $(go.TextBlock, "+",  // the Button content
              { font: "bold 8pt sans-serif" })
          )
        );

      // the context menu allows users to change the font size and weight,
      // and to perform a limited tree layout starting at that node
      myDiagram.nodeTemplate.contextMenu =
        $("ContextMenu",
          $("ContextMenuButton",
            $(go.TextBlock, "Bigger"),
            { click: function(e, obj) { changeTextSize(obj, 1.1); } }),
          $("ContextMenuButton",
            $(go.TextBlock, "Smaller"),
            { click: function(e, obj) { changeTextSize(obj, 1 / 1.1); } }),
          $("ContextMenuButton",
            $(go.TextBlock, "Bold/Normal"),
            { click: function(e, obj) { toggleTextWeight(obj); } }),
          $("ContextMenuButton",
            $(go.TextBlock, "Copy"),
            { click: function(e, obj) { e.diagram.commandHandler.copySelection(); } }),
          $("ContextMenuButton",
            $(go.TextBlock, "Delete"),
            { click: function(e, obj) { e.diagram.commandHandler.deleteSelection(); } }),
          $("ContextMenuButton",
            $(go.TextBlock, "Undo"),
            { click: function(e, obj) { e.diagram.commandHandler.undo(); } }),
          $("ContextMenuButton",
            $(go.TextBlock, "Redo"),
            { click: function(e, obj) { e.diagram.commandHandler.redo(); } }),
          $("ContextMenuButton",
            $(go.TextBlock, "Layout"),
            {
              click: function(e, obj) {
                var adorn = obj.part;
                adorn.diagram.startTransaction("Subtree Layout");
                layoutTree(adorn.adornedPart);
                adorn.diagram.commitTransaction("Subtree Layout");
              }
            }
          )
        );

      // a link is just a Bezier-curved line of the same color as the node to which it is connected
      myDiagram.linkTemplate =
        $(go.Link,
          {
            curve: go.Link.Bezier,
            fromShortLength: -2,
            toShortLength: -2,
            selectable: false
          },
          $(go.Shape,
            { strokeWidth: 3 },
            new go.Binding("stroke", "toNode", function(n) {
              if (n.data.brush) return n.data.brush;
              return "black";
            }).ofObject())
        );

      // the Diagram's context menu just displays commands for general functionality
      myDiagram.contextMenu =
        $("ContextMenu",
          $("ContextMenuButton",
            $(go.TextBlock, "Paste"),
            { click: function (e, obj) { e.diagram.commandHandler.pasteSelection(e.diagram.toolManager.contextMenuTool.mouseDownPoint); } },
            new go.Binding("visible", "", function(o) { return o.diagram && o.diagram.commandHandler.canPasteSelection(o.diagram.toolManager.contextMenuTool.mouseDownPoint); }).ofObject()),
          $("ContextMenuButton",
            $(go.TextBlock, "Undo"),
            { click: function(e, obj) { e.diagram.commandHandler.undo(); } },
            new go.Binding("visible", "", function(o) { return o.diagram && o.diagram.commandHandler.canUndo(); }).ofObject()),
          $("ContextMenuButton",
            $(go.TextBlock, "Redo"),
            { click: function(e, obj) { e.diagram.commandHandler.redo(); } },
            new go.Binding("visible", "", function(o) { return o.diagram && o.diagram.commandHandler.canRedo(); }).ofObject()),
          $("ContextMenuButton",
            $(go.TextBlock, "Save"),
            { click: function(e, obj) { save(); } }),
          $("ContextMenuButton",
            $(go.TextBlock, "Load"),
            { click: function(e, obj) { load(); } })
        );

      myDiagram.addDiagramListener("SelectionMoved", function(e) {
        var rootX = myDiagram.findNodeForKey(0).location.x;
        myDiagram.selection.each(function(node) {
          if (node.data.parent !== 0) return; // Only consider nodes connected to the root
          var nodeX = node.location.x;
          if (rootX < nodeX && node.data.dir !== "right") {
            updateNodeDirection(node, "right");
          } else if (rootX > nodeX && node.data.dir !== "left") {
            updateNodeDirection(node, "left");
          }
          layoutTree(node);
        });
      });

      // read in the predefined graph using the JSON format data held in the "mySavedModel" textarea
      load();
    }

    function spotConverter(dir, from) {
      if (dir === "left") {
        return (from ? go.Spot.Left : go.Spot.Right);
      } else {
        return (from ? go.Spot.Right : go.Spot.Left);
      }
    }

    function changeTextSize(obj, factor) {
      var adorn = obj.part;
      adorn.diagram.startTransaction("Change Text Size");
      var node = adorn.adornedPart;
      var tb = node.findObject("TEXT");
      tb.scale *= factor;
      adorn.diagram.commitTransaction("Change Text Size");
    }

    function toggleTextWeight(obj) {
      var adorn = obj.part;
      adorn.diagram.startTransaction("Change Text Weight");
      var node = adorn.adornedPart;
      var tb = node.findObject("TEXT");
      // assume "bold" is at the start of the font specifier
      var idx = tb.font.indexOf("bold");
      if (idx < 0) {
        tb.font = "bold " + tb.font;
      } else {
        tb.font = tb.font.substr(idx + 5);
      }
      adorn.diagram.commitTransaction("Change Text Weight");
    }

    function updateNodeDirection(node, dir) {
      myDiagram.model.setDataProperty(node.data, "dir", dir);
      // recursively update the direction of the child nodes
      var chl = node.findTreeChildrenNodes(); // gives us an iterator of the child nodes related to this particular node
      while (chl.next()) {
        updateNodeDirection(chl.value, dir);
      }
    }

    function addNodeAndLink(e, obj) {
      var adorn = obj.part;
      var diagram = adorn.diagram;
      diagram.startTransaction("Add Node");
      var oldnode = adorn.adornedPart;
      var olddata = oldnode.data;
      // copy the brush and direction to the new node data
      var newdata = { text: "idea", brush: olddata.brush, dir: olddata.dir, parent: olddata.key };
      diagram.model.addNodeData(newdata);
      layoutTree(oldnode);
      diagram.commitTransaction("Add Node");

      // if the new node is off-screen, scroll the diagram to show the new node
      var newnode = diagram.findNodeForData(newdata);
      if (newnode !== null) diagram.scrollToRect(newnode.actualBounds);
    }

    function layoutTree(node) {
      if (node.data.key === 0) {  // adding to the root?
        layoutAll();  // lay out everything
      } else {  // otherwise lay out only the subtree starting at this parent node
        var parts = node.findTreeParts();
        layoutAngle(parts, node.data.dir === "left" ? 180 : 0);
      }
    }

    function layoutAngle(parts, angle) {
      var layout = go.GraphObject.make(go.TreeLayout,
        {
          angle: angle,
          arrangement: go.TreeLayout.ArrangementFixedRoots,
          nodeSpacing: 5,
          layerSpacing: 20,
          setsPortSpot: false, // don't set port spots since we're managing them with our spotConverter function
          setsChildPortSpot: false
        });
      layout.doLayout(parts);
    }

    function layoutAll() {
      var root = myDiagram.findNodeForKey(0);
      if (root === null) return;
      myDiagram.startTransaction("Layout");
      // split the nodes and links into two collections
      var rightward = new go.Set(/*go.Part*/);
      var leftward = new go.Set(/*go.Part*/);
      root.findLinksConnected().each(function(link) {
        var child = link.toNode;
        if (child.data.dir === "left") {
          leftward.add(root);  // the root node is in both collections
          leftward.add(link);
          leftward.addAll(child.findTreeParts());
        } else {
          rightward.add(root);  // the root node is in both collections
          rightward.add(link);
          rightward.addAll(child.findTreeParts());
        }
      });
      // do one layout and then the other without moving the shared root node
      layoutAngle(rightward, 0);
      layoutAngle(leftward, 180);
      myDiagram.commitTransaction("Layout");
    }

    // Show the diagram's model in JSON format
    function save() {
      document.getElementById("mySavedModel").value = myDiagram.model.toJson();
      myDiagram.isModified = false;
    }
    function load() {
      myDiagram.model = go.Model.fromJson(document.getElementById("mySavedModel").value);
    }
  </script>
</head>
<body onload="init()">
<div id="sample">
  <div id="myDiagramDiv" style="border: solid 1px black; width:100%; height:300px;"></div>
  <p>
    A mind map is a kind of spider diagram that organizes information around a central concept, with connecting branches.
  </p>
  <p>
    The layout is controlled by moving the nodes closest to the tree's root node.
    When one of these nodes is moved horizontally to the other side of the root,
    all of its children will be sent to <a>Layout.doLayout</a> with a new direction,
    causing text to always be moved outwards from the root. The <b>spotConverter</b> function is used to manage
    <a>GraphObject.fromSpot</a> and <a>GraphObject.toSpot</a> for nodes manually, so the <a>TreeLayout.setsPortSpot</a> and <a>TreeLayout.setsChildPortSpot</a>
    properties are set to false so that laying out the diagram will not overwrite the values.
  </p>
  <p>
    When a node is deleted the <a>CommandHandler.deletesTree</a> property ensures that
    all of its children are deleted with it. When a node is dragged the <a>DraggingTool.dragsTree</a>
    property ensures that all its children are dragged with it.
    Both of these are set during the the Diagram's initalization.
  </p>
  <p>
    Node templates also have a <a>Part.selectionAdornmentTemplate</a> defined to allow for new nodes to be created and a <a>GraphObject.contextMenu</a> with additional commands.
  </p>

  <button id="SaveButton" onclick="save()">Save</button>
  <button onclick="load()">Load</button>
  <button onclick="layoutAll()">Layout</button>
  Diagram Model saved in JSON format:
  <br />
  <textarea id="mySavedModel" style="width:100%;height:400px">
{ "class": "go.TreeModel",
  "nodeDataArray": [
{"key":0, "text":"Mind Map", "loc":"0 0"},
{"key":1, "parent":0, "text":"Getting more time", "brush":"skyblue", "dir":"right", "loc":"77 -22"},
{"key":11, "parent":1, "text":"Wake up early", "brush":"skyblue", "dir":"right", "loc":"200 -48"},
{"key":12, "parent":1, "text":"Delegate", "brush":"skyblue", "dir":"right", "loc":"200 -22"},
{"key":13, "parent":1, "text":"Simplify", "brush":"skyblue", "dir":"right", "loc":"200 4"},
{"key":2, "parent":0, "text":"More effective use", "brush":"darkseagreen", "dir":"right", "loc":"77 43"},
{"key":21, "parent":2, "text":"Planning", "brush":"darkseagreen", "dir":"right", "loc":"203 30"},
{"key":211, "parent":21, "text":"Priorities", "brush":"darkseagreen", "dir":"right", "loc":"274 17"},
{"key":212, "parent":21, "text":"Ways to focus", "brush":"darkseagreen", "dir":"right", "loc":"274 43"},
{"key":22, "parent":2, "text":"Goals", "brush":"darkseagreen", "dir":"right", "loc":"203 56"},
{"key":3, "parent":0, "text":"Time wasting", "brush":"palevioletred", "dir":"left", "loc":"-20 -31.75"},
{"key":31, "parent":3, "text":"Too many meetings", "brush":"palevioletred", "dir":"left", "loc":"-117 -64.25"},
{"key":32, "parent":3, "text":"Too much time spent on details", "brush":"palevioletred", "dir":"left", "loc":"-117 -25.25"},
{"key":33, "parent":3, "text":"Message fatigue", "brush":"palevioletred", "dir":"left", "loc":"-117 0.75"},
{"key":331, "parent":31, "text":"Check messages less", "brush":"palevioletred", "dir":"left", "loc":"-251 -77.25"},
{"key":332, "parent":31, "text":"Message filters", "brush":"palevioletred", "dir":"left", "loc":"-251 -51.25"},
{"key":4, "parent":0, "text":"Key issues", "brush":"coral", "dir":"left", "loc":"-20 52.75"},
{"key":41, "parent":4, "text":"Methods", "brush":"coral", "dir":"left", "loc":"-103 26.75"},
{"key":42, "parent":4, "text":"Deadlines", "brush":"coral", "dir":"left", "loc":"-103 52.75"},
{"key":43, "parent":4, "text":"Checkpoints", "brush":"coral", "dir":"left", "loc":"-103 78.75"}
 ]
}
  </textarea>
</div>
</body>
</html>