gojs

<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Pipe Tree</title> <meta name="description" content="A tree structure that does not use links." /> <meta name="viewport" content="width=device-width, initial-scale=1">  <script src="../release/go.js"></script> <script src="../assets/js/goSamples.js"></script>  <script id="code"> function init() { if (window.goSamples) goSamples(); // init for these samples -- you don't need to call this var $ = go.GraphObject.make; // for conciseness in defining templates myDiagram = $(go.Diagram, "myDiagramDiv", // Diagram refers to its DIV HTML element by id { isReadOnly: true, // define a TreeLayout where alternating layers of nodes grow in different directions // child and parent nodes have no space between them. layout: $(go.TreeLayout, { treeStyle: go.TreeLayout.StyleAlternating, angle: 90, layerSpacing: 0, alternateAngle: 0, alternateLayerSpacing: 0 }) }); // the node template // the shape will be resized appropriately when the model is set up myDiagram.nodeTemplate = $(go.Node, "Auto", $(go.Shape, "Rectangle", { name: "SHAPE", width: 30, height: 30 }, new go.Binding("fill", "color"), new go.Binding("stroke", "color")), $(go.TextBlock, { name: "TEXTBLOCK", margin: 5 }, new go.Binding("text", "flow", function(flow) { return getText(flow); })) ); // the Links should have no graphical representation myDiagram.linkTemplate = $(go.Link); myDiagram.model = new go.TreeModel([ { key: 1, flow: 92, color: "#808080" }, { key: 2, "parent": 1, flow: 47, color: "#808080" }, { key: 3, "parent": 1, flow: 45, color: "#808080" }, { key: 4, "parent": 2, flow: 15, color: "#808080" }, { key: 5, "parent": 2, flow: 17, color: "#808080" }, { key: 6, "parent": 2, flow: 15, color: "#808080" }, { key: 7, "parent": 5, flow: 8, color: "#FFFF00" }, { key: 8, "parent": 5, flow: 9, color: "#FF0000" }, { key: 9, "parent": 6, flow: 5, color: "#808080" }, { key: 10, "parent": 6, flow: 5, color: "#808080" }, { key: 11, "parent": 6, flow: 5, color: "#808080" } ]); myDiagram.delayInitialization(updatePipes); } // return the text for the TextBlock, using the current number to determine its name function getText(flow) { if (flow < 10) return "SubLateral -- Current: " + flow + " gpm"; if (flow < 25) return "Lateral -- Current: " + flow + " gpm"; if (flow < 50) return "SubMain -- Current: " + flow + " gpm"; return "Main -- Max: 100 gpm Current: " + flow + " gpm"; } // give all shapes the appropriate dimensions and text color, size, and orientation. function updatePipes() { var updated = 1; // when this is 0, no more nodes are in need of updating while (updated !== 0) { // have layout determine node positions first myDiagram.layoutDiagram(); updated = 0; var nodes = myDiagram.nodes.iterator; while (nodes.next()) { var node = nodes.value; var shape = node.findObject("SHAPE"); if (!areChildrenUpdated(node) || !(shape.width === shape.height)) continue; // update the node if all of its children have been updated and it has not // this allows its size to be determined based on its childrens' positions once they have been updated and repositioned else updated++; // depending on the lightness of the node's color, make the text black or white var colorBrightness = parseInt(shape.fill.substring(1, 3), 16) + parseInt(shape.fill.substring(3, 5), 16) + parseInt(shape.fill.substring(5, 7), 16); if (colorBrightness <= 384) { node.findObject("TEXTBLOCK").stroke = "white"; } var horiz; var linkIn = node.findTreeParentLink(); if (linkIn === null) horiz = true; // the root node grows horizontally from the left, as do any nodes with links entering their left side else horiz = linkIn.toSpot.x === 0; var long = 70; // the length of the longer side of the shape if (node.findTreeChildrenLinks().count === 0) long = 170; var short = 20; // the length of the shorter side of the shape var flow = node.data.flow; // size of the shape depends on the node's "current" if (flow > 20) { short = 50; long += 30; } if (flow > 50) short = 100; // font size also depends on current node.findObject("TEXTBLOCK").font = Math.floor(10 + flow / 11) + "px sans-serif"; var chl = node.findTreeChildrenNodes(); if (horiz) { var min = node.location.x; var max = min; while (chl.next()) { if (min === max) if (chl.value.location.x < min) min = chl.value.location.x; if (chl.value.location.x > max) max = chl.value.location.x; } long += max - min; // make sure the shape is large enough to reach all children if (long < 160) long = 160; // a minimum shape size shape.height = short; shape.width = long; // the horizontal side is longer // set the shape's size } else { var min = node.location.y; var max = min; while (chl.next()) { if (min === max) if (chl.value.location.y < min) min = chl.value.location.y; if (chl.value.location.y > max) max = chl.value.location.y; } long += max - min; if (long < 160) long = 160; shape.height = long; shape.width = short; // the longer size is the vertical one in this case node.findObject("TEXTBLOCK").angle = 90; // rotate the TextBlock if the shape is longer vertically } } } } // check if the children of this node have all had their sizes changed from the initial one // if they have been updated, their widths and heights cannot be equal function areChildrenUpdated(node) { return node.findTreeChildrenNodes().all(function(child) { return (child.findObject("SHAPE").width !== child.findObject("SHAPE").height); }); } </script> </head> <body onload="init()"> <div id="sample"> <div id="myDiagramDiv" style="width:100%;height:600px;border:1px solid black;"></div> <p> This diagram does not display <a>Link</a>s. Instead the <a>TreeLayout.layerSpacing</a> is set to 0, so that each node and its children have no space between them. </p> <p> The <a>TreeLayout.treeStyle</a> is set to StyleAlternating, so that alternating layers of the tree grow in each of two directions. Each node's <a>TextBlock</a> is angled according to the direction of the layer of the tree that it is in, and the <a>Shape</a>'s size is set according to direction and the position of the node's children. </p> </div> </body> </html>