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