252 lines
11 KiB
HTML
252 lines
11 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<title>Selection Adornment Buttons</title>
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<meta name="description" content="When a diagram node is selected show buttons on which a click invokes a command or a drag starts a tool">
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<!-- Copyright 1998-2017 by Northwoods Software Corporation. -->
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<meta charset="UTF-8">
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<script src="../release/go.js"></script>
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<script src="../assets/js/goSamples.js"></script> <!-- this is only for the GoJS Samples framework -->
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<script id="code">
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function init() {
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if (window.goSamples) goSamples(); // init for these samples -- you don't need to call this
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var $ = go.GraphObject.make; // for conciseness in defining templates
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myDiagram = $(go.Diagram, "myDiagramDiv", // create a Diagram for the DIV HTML element
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{
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initialContentAlignment: go.Spot.Center, // center the content
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"linkingTool.isEnabled": false, // invoked explicitly by drawLink function, below
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"linkingTool.direction": go.LinkingTool.ForwardsOnly, // only draw "from" towards "to"
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"undoManager.isEnabled": true // enable undo & redo
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});
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myDiagram.linkTemplate =
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$(go.Link,
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{ routing: go.Link.AvoidsNodes, corner: 5 },
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$(go.Shape, { strokeWidth: 1.5 }),
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$(go.Shape, { toArrow: "OpenTriangle" })
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);
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myDiagram.nodeTemplate =
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$(go.Node, "Auto",
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{
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desiredSize: new go.Size(80, 80),
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// rearrange the link points evenly along the sides of the nodes as links are
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// drawn or reconnected -- these event handlers only make sense when the fromSpot
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// and toSpot are Spot.xxxSides
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linkConnected: function(node, link, port) {
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if (link.fromNode !== null) link.fromNode.invalidateConnectedLinks();
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if (link.toNode !== null) link.toNode.invalidateConnectedLinks();
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},
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linkDisconnected: function(node, link, port) {
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if (link.fromNode !== null) link.fromNode.invalidateConnectedLinks();
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if (link.toNode !== null) link.toNode.invalidateConnectedLinks();
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},
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locationSpot: go.Spot.Center
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},
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new go.Binding("location", "location", go.Point.parse).makeTwoWay(go.Point.stringify),
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$(go.Shape,
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{
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name: "SHAPE", // named so that changeColor can modify it
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strokeWidth: 0, // no border
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fill: "lightgray", // default fill color
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portId: "",
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// use the following property if you want users to draw new links
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// interactively by dragging from the Shape, and re-enable the LinkingTool
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// in the initialization of the Diagram
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//cursor: "pointer",
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fromSpot: go.Spot.AllSides, fromLinkable: true,
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fromLinkableDuplicates: true, fromLinkableSelfNode: true,
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toSpot: go.Spot.AllSides, toLinkable: true,
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toLinkableDuplicates: true, toLinkableSelfNode: true
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},
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new go.Binding("fill", "color").makeTwoWay()),
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$(go.TextBlock,
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{
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name: "TEXTBLOCK", // named so that editText can start editing it
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margin: 3,
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// use the following property if you want users to interactively start
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// editing the text by clicking on it or by F2 if the node is selected:
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//editable: true,
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overflow: go.TextBlock.OverflowEllipsis,
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maxLines: 5
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},
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new go.Binding("text").makeTwoWay())
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);
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// a selected node shows an Adornment that includes both a blue border
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// and a row of Buttons above the node
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myDiagram.nodeTemplate.selectionAdornmentTemplate =
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$(go.Adornment, "Spot",
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$(go.Panel, "Auto",
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$(go.Shape, { stroke: "dodgerblue", strokeWidth: 2, fill: null }),
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$(go.Placeholder)
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),
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$(go.Panel, "Horizontal",
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{ alignment: go.Spot.Top, alignmentFocus: go.Spot.Bottom },
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$("Button",
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{ click: editText }, // defined below, to support editing the text of the node
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$(go.TextBlock, "t",
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{ font: "bold 10pt sans-serif", desiredSize: new go.Size(15, 15), textAlign: "center" })
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),
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$("Button",
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{ click: changeColor, "_buttonFillOver": "transparent" }, // defined below, to support changing the color of the node
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new go.Binding("ButtonBorder.fill", "color", nextColor),
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$(go.Shape,
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{ fill: null, stroke: null, desiredSize: new go.Size(14, 14) })
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),
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$("Button",
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{ // drawLink is defined below, to support interactively drawing new links
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click: drawLink, // click on Button and then click on target node
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actionMove: drawLink // drag from Button to the target node
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},
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$(go.Shape,
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{ geometryString: "M0 0 L8 0 8 12 14 12 M12 10 L14 12 12 14" })
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),
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$("Button",
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{
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actionMove: dragNewNode, // defined below, to support dragging from the button
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_dragData: { text: "a Node", color: "lightgray" }, // node data to copy
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click: clickNewNode // defined below, to support a click on the button
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},
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$(go.Shape,
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{ geometryString: "M0 0 L3 0 3 10 6 10 x F1 M6 6 L14 6 14 14 6 14z", fill: "gray" })
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)
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)
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);
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function editText(e, button) {
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var node = button.part.adornedPart;
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e.diagram.commandHandler.editTextBlock(node.findObject("TEXTBLOCK"));
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}
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// used by nextColor as the list of colors through which we rotate
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var myColors = ["lightgray", "lightblue", "lightgreen", "yellow", "orange", "pink"];
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// used by both the Button Binding and by the changeColor click function
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function nextColor(c) {
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var idx = myColors.indexOf(c);
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if (idx < 0) return "lightgray";
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if (idx >= myColors.length-1) idx = 0;
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return myColors[idx+1];
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}
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function changeColor(e, button) {
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var node = button.part.adornedPart;
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var shape = node.findObject("SHAPE");
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if (shape === null) return;
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node.diagram.startTransaction("Change color");
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shape.fill = nextColor(shape.fill);
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button["_buttonFillNormal"] = nextColor(shape.fill); // update the button too
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node.diagram.commitTransaction("Change color");
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}
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function drawLink(e, button) {
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var node = button.part.adornedPart;
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var tool = e.diagram.toolManager.linkingTool;
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tool.startObject = node.port;
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e.diagram.currentTool = tool;
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tool.doActivate();
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}
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// used by both clickNewNode and dragNewNode to create a node and a link
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// from a given node to the new node
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function createNodeAndLink(data, fromnode) {
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var diagram = fromnode.diagram;
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var model = diagram.model;
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var nodedata = model.copyNodeData(data);
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model.addNodeData(nodedata);
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var newnode = diagram.findNodeForData(nodedata);
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var linkdata = model.copyLinkData({});
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model.setFromKeyForLinkData(linkdata, model.getKeyForNodeData(fromnode.data));
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model.setToKeyForLinkData(linkdata, model.getKeyForNodeData(newnode.data));
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model.addLinkData(linkdata);
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diagram.select(newnode);
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return newnode;
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}
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// the Button.click event handler, called when the user clicks the "N" button
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function clickNewNode(e, button) {
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var data = button._dragData;
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if (!data) return;
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e.diagram.startTransaction("Create Node and Link");
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var fromnode = button.part.adornedPart;
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var newnode = createNodeAndLink(button._dragData, fromnode);
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newnode.location = new go.Point(fromnode.location.x + 200, fromnode.location.y);
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e.diagram.commitTransaction("Create Node and Link");
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}
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// the Button.actionMove event handler, called when the user drags within the "N" button
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function dragNewNode(e, button) {
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var tool = e.diagram.toolManager.draggingTool;
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if (tool.isBeyondDragSize()) {
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var data = button._dragData;
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if (!data) return;
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e.diagram.startTransaction("button drag"); // see doDeactivate, below
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var newnode = createNodeAndLink(data, button.part.adornedPart);
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newnode.location = e.diagram.lastInput.documentPoint;
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// don't commitTransaction here, but in tool.doDeactivate, after drag operation finished
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// set tool.currentPart to a selected movable Part and then activate the DraggingTool
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tool.currentPart = newnode;
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e.diagram.currentTool = tool;
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tool.doActivate();
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}
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}
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// using dragNewNode also requires modifying the standard DraggingTool so that it
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// only calls commitTransaction when dragNewNode started a "button drag" transaction;
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// do this by overriding DraggingTool.doDeactivate:
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var tool = myDiagram.toolManager.draggingTool;
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tool.doDeactivate = function() {
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// commit "button drag" transaction, if it is ongoing; see dragNewNode, above
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if (tool.diagram.undoManager.nestedTransactionNames.elt(0) === "button drag") {
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tool.diagram.commitTransaction();
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}
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go.DraggingTool.prototype.doDeactivate.call(tool); // call the base method
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};
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myDiagram.model = new go.GraphLinksModel(
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[
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{ key: 1, text: "Alpha", color: "lightblue", location: "0 0" },
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{ key: 2, text: "Beta", color: "orange", location: "140 0" },
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{ key: 3, text: "Gamma", color: "lightgreen", location: "0 140" },
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{ key: 4, text: "Delta", color: "pink", location: "140 140" }
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],
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[
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{ from: 1, to: 2 }
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]);
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myDiagram.findNodeForKey(4).isSelected = true;
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}
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</script>
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</head>
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<body onload="init()">
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<div id="sample">
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<div id="myDiagramDiv" style="border: solid 1px black; width:100%; height:600px"></div>
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<p>
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The node template uses a custom <a>Part.selectionAdornmentTemplate</a> to
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add a row of Buttons when the node is selected.
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Select a node and you will see the Buttons for the node.
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</p>
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<p>
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The first button, "T", when clicked, starts in-place editing of the text.
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</p>
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<p>
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The second button, "C", when clicked, changes the color of the node,
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rotating through a list of colors.
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</p>
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<p>
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The third button, "L", when clicked or dragged, starts the <a>LinkingTool</a>,
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drawing a new link starting at the selected node.
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</p>
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<p>
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The fourth button, "N", when clicked, adds a new node and creates a link from
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the selected node to the new node.
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Dragging from the fourth button does the same thing as a click but also activates
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the <a>DraggingTool</a>, allowing the user to drag the new node where they like.
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</p>
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</div>
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</body>
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</html> |