link 文本的 goJS 下拉菜单
goJS dropdown for link text
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：
我想为用户创建自定义选择下拉菜单以编辑节点和 link 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择：
<!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>
看起来像这样：
节点文本没问题，但 link 文本有问题。我希望当用户选择一个选项时，他不能再对其他 link 文本使用该选项。我还想在删除 link 时让该选项再次可用。
正如您在代码中看到的那样，我在我的图表上添加了 2 个事件侦听器（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的信息对象及其文本。
我需要确保它是 link，这样我才能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。
好的，我们假设 link 标签的选择列表保存在 Model.modelData 对象中。我将命名 属性 "choices"，当然你可以使用任何你喜欢的名字。
myDiagram.model.set(myDiagram.model.modelData, "choices", ["one", "two", "three"]);
您的 Link 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 TextBlock.textEditor 是如何定义为 TextEditorSelectBox 而 TextBlock.textEdited事件处理程序定义为将 modelData.choices 属性 设置为没有所选字符串的新数组。
它还将 TextBlock.editable 设置回 false，以便用户无法重新选择 Link。这是避免重复编辑问题的一种方法；但您可以实施自己的政策。回想起来，我认为更可能的策略是将旧值添加到 modelData.choices 数组并从中删除新值。
此外，您还需要实现一个 Model Changed 侦听器，当 Links 已从模型中删除时发出通知，以便您可以将其选择添加回 myDiagram.model.modelData.choices 数组。在您的 Diagram 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);
}
}
}
})
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：
我想为用户创建自定义选择下拉菜单以编辑节点和 link 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择：
<!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>
看起来像这样：
节点文本没问题，但 link 文本有问题。我希望当用户选择一个选项时，他不能再对其他 link 文本使用该选项。我还想在删除 link 时让该选项再次可用。
正如您在代码中看到的那样，我在我的图表上添加了 2 个事件侦听器（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的信息对象及其文本。
我需要确保它是 link，这样我才能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。
好的，我们假设 link 标签的选择列表保存在 Model.modelData 对象中。我将命名 属性 "choices"，当然你可以使用任何你喜欢的名字。
myDiagram.model.set(myDiagram.model.modelData, "choices", ["one", "two", "three"]);
您的 Link 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 TextBlock.textEditor 是如何定义为 TextEditorSelectBox 而 TextBlock.textEdited事件处理程序定义为将 modelData.choices 属性 设置为没有所选字符串的新数组。
它还将 TextBlock.editable 设置回 false，以便用户无法重新选择 Link。这是避免重复编辑问题的一种方法；但您可以实施自己的政策。回想起来，我认为更可能的策略是将旧值添加到 modelData.choices 数组并从中删除新值。
此外，您还需要实现一个 Model Changed 侦听器，当 Links 已从模型中删除时发出通知，以便您可以将其选择添加回 myDiagram.model.modelData.choices 数组。在您的 Diagram 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);
}
}
}
})