markgojs
Version:
Interactive diagrams, charts, and graphs, such as trees, flowcharts, orgcharts, UML, BPMN, or business diagrams
110 lines (96 loc) • 3.99 kB
HTML
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Drag Zooming Tool</title>
<!-- Copyright 1998-2019 by Northwoods Software Corporation. -->
<meta charset="UTF-8">
<script src="../release/go.js"></script>
<script src="../assets/js/goSamples.js"></script> <!-- this is only for the GoJS Samples framework -->
<script src="DragZoomingTool.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",
{
initialDocumentSpot: go.Spot.Center,
initialViewportSpot: go.Spot.Center,
// Define the template for Nodes, just some text inside a colored rectangle
nodeTemplate:
$(go.Node, "Spot",
{ width: 70, height: 20 },
$(go.Shape, "Rectangle",
new go.Binding("fill", "c")),
$(go.TextBlock,
{ margin: 2 },
new go.Binding("text", "c"))),
// Define the template for Links, just a simple line
linkTemplate:
$(go.Link,
$(go.Shape, { stroke: "black" })),
layout:
$(go.TreeLayout,
{
angle: 90,
nodeSpacing: 4,
compaction: go.TreeLayout.CompactionNone
}),
model:
$(go.TreeModel,
{ // we use single character property names, to save space if rendered as JSON
nodeKeyProperty: "k",
nodeParentKeyProperty: "p"
})
});
// Add an instance of the custom tool defined in DragZoomingTool.js.
// This needs to be inserted before the standard DragSelectingTool,
// which is normally the third Tool in the ToolManager.mouseMoveTools list.
myDiagram.toolManager.mouseMoveTools.insertAt(2, new DragZoomingTool());
// This is a status message
myLoading =
$(go.Part,
{ selectable: false, location: new go.Point(0, 0) },
$(go.TextBlock, "loading...",
{ stroke: "red", font: "20pt sans-serif" }));
// temporarily add the status indicator
myDiagram.add(myLoading);
// allow the myLoading indicator to be shown now,
// but allow objects added in loadTree to also be considered part of the initial Diagram
myDiagram.delayInitialization(loadTree);
}
function loadTree() {
// create some tree data
var total = 99;
var treedata = [];
for (var i = 0; i < total; i++) {
// these property names are also specified when creating the TreeModel
var d = {
k: i, // this node data's key
c: go.Brush.randomColor(), // the node's color
p: (i > 0 ? Math.floor(Math.random() * i / 2) : undefined) // the random parent's key
};
treedata.push(d);
}
// give the Diagram's model all the data
myDiagram.model.nodeDataArray = treedata;
// remove the status indicator
myDiagram.remove(myLoading);
}
</script>
</head>
<body onload="init()">
<div id="sample">
<div id="myDiagramDiv" style="background-color: white; border: solid 1px black; width: 100%;height: 800px"></div>
<p>
This sample demonstrates the DragZoomingTool, which replaces the standard DragSelectingTool. It is defined in its own file, as <a href="DragZoomingTool.js">DragZoomingTool.js</a>.
</p>
<p>
Press in the background, wait briefly, and then drag to zoom in to show the area of the drawn rectangle.
Hold down the Shift key to zoom out.
The rectangle always has the same aspect ratio as the viewport of the diagram.
</p>
</div>
</body>
</html>