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javascript - goJS 链接文本下拉菜单

转载 作者：行者123 更新时间：2023-12-01 02:38:22 27 4
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我有一个简单的 python Flask 应用程序，我将 JSON 数据发送到我的 HTML，并使用 goJS 显示我的图表，如下所示:

enter image description here

我想为用户创建自定义选择下拉列表来编辑节点和链接文本。到目前为止，我使用此代码使节点文本在下拉列表中可选:

<!DOCTYPE html>
<html lang="en">
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>State Chart</title>
<meta name="description" content="A finite state machine chart with editable and interactive features." />
<meta charset="UTF-8">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<link href="http://getbootstrap.com/dist/css/bootstrap.min.css" rel="stylesheet">

<script src="{{url_for('static', filename='go.js')}}"></script>

<!-- custom text editors -->
<script src="{{url_for('static', filename='TextEditorSelectBox.js')}}"></script>
<script src="{{url_for('static', filename='TextEditorRadioButtons.js')}}"></script>


<script src="{{url_for('static', filename='DataInspector.js')}}"></script>

<link href="https://gojs.net/latest/extensions/DataInspector.css" rel="stylesheet">
<link href="{{url_for('static', filename='DataInspector.css')}}" rel="stylesheet">


<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet"> 
<script id="code">

    var nodeChoices = ['choice 1', 'choice 2', 'choice 3', 'choice 4', 'choice 5'];
    var linkChoices = ['link choice 1', 'link choice 2', 'link choice 3', 'link choice 4', 'link choice 5'];

    function init() {

        var $ = go.GraphObject.make;
        myDiagram =
        $(go.Diagram, "myDiagramDiv",  // must name or refer to the DIV HTML element
        {
            // start everything in the middle of the viewport
            initialContentAlignment: go.Spot.Center,
            // have mouse wheel events zoom in and out instead of scroll up and down
            "toolManager.mouseWheelBehavior": go.ToolManager.WheelZoom,
            // support double-click in background creating a new node
            "clickCreatingTool.archetypeNodeData": { text: "new node" },
            // enable undo & redo
            "textEditingTool.defaultTextEditor": window.TextEditorSelectBox,
            "undoManager.isEnabled": true,
            "layout": new go.ForceDirectedLayout()
        });


        // 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);
            }
        });

        myDiagram.addDiagramListener("textEdited", function(e) {
            console.log("Text is edited");
            console.log(e);

            //CHECK IF LINK,
            //IF YES REMOVE THAT OPTION FROM LIST

        });

        myDiagram.addDiagramListener("SelectionDeleting", function(e) {
            console.log("inside SelectionDeleting");
            console.log(e);

            //CHECK IF LINK,
            //IF YES PUT THAT OPTION BACK IN OPTION LIST

        });

            // define the Node template
        myDiagram.nodeTemplate =
          $(go.Node, "Auto",
            new go.Binding("location", "loc", go.Point.parse).makeTwoWay(go.Point.stringify),
            // define the node's outer shape, which will surround the TextBlock
            $(go.Shape, "RoundedRectangle",
              {
                parameter1: 20,  // the corner has a large radius
                fill: $(go.Brush, "Linear", { 0: "rgb(254, 201, 0)", 1: "rgb(254, 162, 0)" }),
                stroke: null,
                portId: "",  // this Shape is the Node's port, not the whole Node
                fromLinkable: true, fromLinkableDuplicates: true,
                toLinkable: true, toLinkableDuplicates: true,
                cursor: "pointer"
              }),
            $(go.TextBlock,
              {
                font: "bold 11pt helvetica, bold arial, sans-serif",
                editable: true,  // editing the text automatically updates the model data
                //textEditor: window.TextEditorRadioButtons, // defined in textEditorRadioButtons.js
                // this specific TextBlock has its own choices:
                textEditor: window.TextEditorRadioButtons,
                //choices: JSON.parse('{{ choices | tojson | safe}}')
                choices: nodeChoices
              },
            new go.Binding("text").makeTwoWay())
        );

        myDiagram.nodeTemplate.selectionAdornmentTemplate =
        $(go.Adornment, "Spot",
            $(go.Panel, "Auto",
            $(go.Shape, { stroke: "dodgerblue", strokeWidth: 2, fill: null }),
            $(go.Placeholder)
        ),
        $(go.Panel, "Horizontal",
            { alignment: go.Spot.Top, alignmentFocus: go.Spot.Bottom },
            $("Button",
                { click: editText },  // defined below, to support editing the text of the node
                $(go.TextBlock, "t",
                { font: "bold 10pt sans-serif", desiredSize: new go.Size(15, 15), textAlign: "center" })
            ),
            $("Button",
            { // drawLink is defined below, to support interactively drawing new links
                click: drawLink,  // click on Button and then click on target node
                actionMove: drawLink  // drag from Button to the target node
            },
            $(go.Shape,
                { geometryString: "M0 0 L8 0 8 12 14 12 M12 10 L14 12 12 14" })
            ),
            $("Button",
            {
                actionMove: dragNewNode,  // defined below, to support dragging from the button
                _dragData: { text: "?????", color: "lightgray" },  // node data to copy
                click: clickNewNode  // defined below, to support a click on the button
            },
            $(go.Shape,
                { geometryString: "M0 0 L3 0 3 10 6 10 x F1 M6 6 L14 6 14 14 6 14z", fill: "gray" })
          )
        )
      );

    function editText(e, button) {
        //console.log(e);

      var node = button.part.adornedPart;
      console.log("node");
      //console.log(node);
      e.diagram.commandHandler.editTextBlock(node.findObject("TEXTBLOCK"));
      //$("#nodeText").val(node.findObject("TEXTBLOCK"));
    }

    function drawLink(e, button) {
      var node = button.part.adornedPart;
      var tool = e.diagram.toolManager.linkingTool;
      tool.startObject = node.port;
      e.diagram.currentTool = tool;
      tool.doActivate();
    }

   // used by both clickNewNode and dragNewNode to create a node and a link
    // from a given node to the new node
    function createNodeAndLink(data, fromnode) {
        var diagram = fromnode.diagram;
        var model = diagram.model;
        var nodedata = model.copyNodeData(data);
        model.addNodeData(nodedata);
        var newnode = diagram.findNodeForData(nodedata);
        var linkdata = model.copyLinkData({});
        model.setFromKeyForLinkData(linkdata, model.getKeyForNodeData(fromnode.data));
        model.setToKeyForLinkData(linkdata, model.getKeyForNodeData(newnode.data));
        model.addLinkData(linkdata);
        diagram.select(newnode);
        return newnode;
    }

    // the Button.click event handler, called when the user clicks the "N" button
    function clickNewNode(e, button) {
        var data = button._dragData;
        if (!data) return;
        e.diagram.startTransaction("Create Node and Link");
        var fromnode = button.part.adornedPart;
        var newnode = createNodeAndLink(button._dragData, fromnode);
        newnode.location = new go.Point(fromnode.location.x + 200, fromnode.location.y);
        e.diagram.commitTransaction("Create Node and Link");
    }

    // the Button.actionMove event handler, called when the user drags within the "N" button
    function dragNewNode(e, button) {
        var tool = e.diagram.toolManager.draggingTool;
        if (tool.isBeyondDragSize()) {
            var data = button._dragData;
            if (!data) return;
            e.diagram.startTransaction("button drag");  // see doDeactivate, below
            var newnode = createNodeAndLink(data, button.part.adornedPart);
            newnode.location = e.diagram.lastInput.documentPoint;
            // don't commitTransaction here, but in tool.doDeactivate, after drag operation finished
            // set tool.currentPart to a selected movable Part and then activate the DraggingTool
            tool.currentPart = newnode;
            e.diagram.currentTool = tool;
            tool.doActivate();
        }
    }

    // using dragNewNode also requires modifying the standard DraggingTool so that it
    // only calls commitTransaction when dragNewNode started a "button drag" transaction;
    // do this by overriding DraggingTool.doDeactivate:
    var tool = myDiagram.toolManager.draggingTool;
    tool.doDeactivate = function() {
        // commit "button drag" transaction, if it is ongoing; see dragNewNode, above
        if (tool.diagram.undoManager.nestedTransactionNames.elt(0) === "button drag") {
            tool.diagram.commitTransaction();
        }
        go.DraggingTool.prototype.doDeactivate.call(tool);  // call the base method
    };

    // replace the default Link template in the linkTemplateMap
    myDiagram.linkTemplate =
        $(go.Link,  // the whole link panel
        {
            curve: go.Link.Bezier, 
            adjusting: go.Link.Stretch,
            reshapable: true, 
            relinkableFrom: true, 
            relinkableTo: true,
            toShortLength: 3
        },
        new go.Binding("points").makeTwoWay(),
        new go.Binding("curviness"),
        $(go.Shape,  // the link shape
            { strokeWidth: 1.5 }),
        $(go.Shape,  // the arrowhead
            { toArrow: "standard", stroke: null }),
        $(go.Panel, "Auto",
            $(go.Shape,  // the label background, which becomes transparent around the edges
            {
                fill: $(go.Brush, "Radial", { 0: "rgb(240, 240, 240)", 0.3: "rgb(240, 240, 240)", 1: "rgba(240, 240, 240, 0)" }),
                stroke: null
            }),
            $(go.TextBlock,  // the label text
            {
                textAlign: "center",
                font: "12pt helvetica, arial, sans-serif",
                margin: 4,
                editable: true,  // enable in-place editing
                textEditor: window.TextEditorRadioButtons,
                //choices: JSON.parse('{{ choices | tojson | safe}}')
                choices: linkChoices
            },
            // editing the text automatically updates the model data
            new go.Binding("text").makeTwoWay())
        )
    );


    var inspector = new Inspector('myInspectorDiv', myDiagram,
    {
        // uncomment this line to only inspect the named properties below instead of all properties on each object:
        // includesOwnProperties: false,
        properties: {
            "text": { },
            // an example of specifying the type
            "password": { show: Inspector.showIfPresent, type: 'password' },
            // key would be automatically added for nodes, but we want to declare it read-only also:
            "key": { readOnly: true, show: Inspector.showIfPresent },
            // color would be automatically added for nodes, but we want to declare it a color also:
            "color": { show: Inspector.showIfPresent, type: 'color' },
            // Comments and LinkComments are not in any node or link data (yet), so we add them here:
            "Comments": { show: Inspector.showIfNode  },
            "flag": { show: Inspector.showIfNode, type: 'checkbox' },
            "LinkComments": { show: Inspector.showIfLink },
            "isGroup": { readOnly: true, show: Inspector.showIfPresent }
        }
    });

    // read in the JSON data from flask
    loadGraphData();

    }

    function loadGraphData() {
        var graphDataString = JSON.parse('{{ diagramData | tojson | safe}}');
        console.log("graphDataString");
        console.log(graphDataString);

        myDiagram.model = go.Model.fromJson(graphDataString);
    }

    function saveGraphData(form, event) {
        console.log("inside saveGraphData");
        event.preventDefault();

        document.getElementById("mySavedModel").value = myDiagram.model.toJson();
        form.submit();
    }

    function zoomToFit(){
        console.log("inside zoomToFit");
        myDiagram.zoomToRect(myDiagram.documentBounds);
    }

    function zoomIn(){
        console.log("inside zoomIn");
        myDiagram.commandHandler.increaseZoom();
    }
    function zoomOut(){
        console.log("inside zoomOut");
        myDiagram.commandHandler.decreaseZoom();
    }

</script>
</head>
<body onload="init()">

    <div id=formWrapper style="padding: 30px;">

        <form method="POST" action="http://localhost:5000/updateResultFile" name="updateResultFileForm" 
        id="updateResultFileForm" 
        onsubmit="saveGraphData(this, event);">

            <div id="graphWrapper" style="margin-bottom: 15px;">
                <div id="myDiagramDiv" style="border: solid 1px black; width: 100%; height: 800px;margin-bottom: 15px;"></div>
                <div style="display: none;"><input id="mySavedModel" name="mySavedModel"></div>

                <button class="btn btn-default" type="submit"> Save <i class="fa fa-save"> </i> </button>

            </div>

        </form>

        <div id="myInspectorDiv">
        </div>

        <div>
            <button class="btn btn-default" onclick="zoomToFit()"> Zoom to fit  <i class="fa fa-search"> </i> </button>
            <button class="btn btn-default" onclick="zoomIn()"> Zoom in  <i class="fa fa-search-plus"> </i> </button>
            <button class="btn btn-default" onclick="zoomOut()"> Zoom out  <i class="fa fa-search-minus"> </i> </button>
        </div>


    </div>

</body>
</html>

它看起来像这样:

enter image description here

节点文本一切正常，但链接文本有问题。我希望当用户选择一个选项时，他不能再在其他链接文本上使用该选项。我还想在删除该链接时使该选项再次可用。

正如您在代码中看到的，我在图表上添加了 2 个事件监听器(textEdited 和 SelectionDeleting)，当用户编辑文本或删除某些内容时它们工作正常，但我不知道如何提取有关事件对象的信息和它的文本。

我需要确保它是链接，以便我可以在我的选择列表中删除或添加该事件对象文本。任何帮助将不胜感激。

最佳答案

好的，我们假设链接标签的选项列表保存在 Model.modelData 对象中。我将该属性命名为“choices”，但当然您可以使用您喜欢的任何名称。
myDiagram.model.set(myDiagram.model.modelData, "choices", ["one", "two", "three"]);

您的链接模板可能类似于:
myDiagram.linkTemplate =
$(go.Link,
$(go.Shape),
$(go.Shape, { toArrow: "OpenTriangle" }),
$(go.TextBlock,
{
background: "white",
editable: true,
textEditor: window.TextEditorSelectBox, // defined in extensions/textEditorSelectBox.js
textEdited: function(tb, oldstr, newstr) {
var choices = tb.diagram.model.modelData.choices;
var idx = choices.indexOf(newstr);
if (idx >= 0 && oldstr !== newstr) {
console.log("removing choice " + idx + ": " + newstr);
var newchoices = Array.prototype.slice.call(choices);
newchoices.splice(idx, 1);
tb.diagram.model.set(tb.diagram.model.modelData, "choices", newchoices);
tb.editable = false; // don't allow choice again
}
}
},
new go.Binding("text"),
new go.Binding("choices").ofModel())
);

请注意如何将 TextBlock.textEditor 定义为 TextEditorSelectBox，以及如何定义 TextBlock.textEdited 事件处理程序以将 modelData.choices 属性设置为新数组，而无需选择的字符串。

它还将 TextBlock.editable 设置回 false，以便用户无法重新选择该链接。这是避免重复编辑问题的一种方法；但你可以实现你自己的政策。回想起来，我认为更有可能的策略是向 modelData.choices 数组添加旧值并从中删除新值。

此外，您还需要实现一个模型更改监听器，该监听器会通知何时从模型中删除链接，以便您可以将其选择添加回 myDiagram.model.modelData.choices 数组。在您的图表初始化中:
$(go.Diagram, . . .,
{
"ModelChanged": function(e) {
if (e.change === go.ChangedEvent.Remove && e.modelChange === "linkDataArray") {
var linkdata = e.oldValue;
var oldstr = linkdata.text;
if (!oldstr) return;
var choices = e.model.modelData.choices;
var idx = choices.indexOf(oldstr);
if (idx < 0) {
console.log("adding choice: " + oldstr);
var newchoices = Array.prototype.slice.call(choices);
newchoices.push(oldstr);
e.model.set(e.model.modelData, "choices", newchoices);
}
}
}
})

关于javascript - goJS 链接文本下拉菜单，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/47731569/

27 4 0
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