121 lines
5.1 KiB
HTML
121 lines
5.1 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>Drawing Commands</title>
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<meta name="description" content="A demonstration of the DrawCommandHandler extension." />
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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 src="DrawCommandHandler.js"></script>
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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 = $(go.Diagram, "myDiagramDiv", // create a Diagram for the DIV HTML element
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{
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initialContentAlignment: go.Spot.Center, // center the content
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commandHandler: new DrawCommandHandler(), // defined in DrawCommandHandler.js
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"undoManager.isEnabled": true // enable undo & redo
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});
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// define a simple Node template
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myDiagram.nodeTemplate =
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$(go.Node, "Auto", // the Shape will go around the TextBlock
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{ locationSpot: go.Spot.Center },
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$(go.Shape, "RoundedRectangle", { strokeWidth: 0},
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// Shape.fill is bound to Node.data.color
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new go.Binding("fill", "color")),
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$(go.TextBlock,
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{ margin: 8 }, // some room around the text
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// TextBlock.text is bound to Node.data.key
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new go.Binding("text", "key"))
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);
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// but use the default Link template, by not setting Diagram.linkTemplate
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// create the model data that will be represented by Nodes and Links
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myDiagram.model = new go.GraphLinksModel(
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[
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{ key: "Alpha", color: "lightblue" },
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{ key: "Beta", color: "orange" },
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{ key: "Gamma", color: "lightgreen" },
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{ key: "Delta", color: "pink" }
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],
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[
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{ from: "Alpha", to: "Beta" },
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{ from: "Alpha", to: "Gamma" },
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{ from: "Beta", to: "Beta" },
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{ from: "Gamma", to: "Delta" },
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{ from: "Delta", to: "Alpha" }
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]);
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}
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function askSpace() {
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var space = prompt("Desired space between nodes (in pixels):", "0");
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return space;
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}
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// update arrowkey function
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function arrowMode() {
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// no transaction needed, because we are modifying the CommandHandler for future use
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var move = document.getElementById("move");
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var select = document.getElementById("select");
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var scroll = document.getElementById("scroll");
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if (move.checked === true) {
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myDiagram.commandHandler.arrowKeyBehavior = "move";
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} else if (select.checked === true) {
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myDiagram.commandHandler.arrowKeyBehavior = "select";
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} else if (scroll.checked === true) {
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myDiagram.commandHandler.arrowKeyBehavior = "scroll";
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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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<!-- The DIV for the Diagram needs an explicit size or else we won't see anything.
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Also add a border to help see the edges. -->
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<div id="myDiagramDiv" style="border: solid 1px black; width:400px; height:400px"></div>
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<p>
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Align:
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<button onclick="myDiagram.commandHandler.alignLeft()">Left Sides</button>
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<button onclick="myDiagram.commandHandler.alignRight()">Right Sides</button>
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<button onclick="myDiagram.commandHandler.alignTop()">Tops</button>
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<button onclick="myDiagram.commandHandler.alignBottom()">Bottoms</button>
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<button onclick="myDiagram.commandHandler.alignCenterX()">Center X</button>
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<button onclick="myDiagram.commandHandler.alignCenterY()">Center Y</button>
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<button onclick="myDiagram.commandHandler.alignRow(askSpace())">Row</button>
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<button onclick="myDiagram.commandHandler.alignColumn(askSpace())">Column</button>
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</br>
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Rotate:
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<button onclick="myDiagram.commandHandler.rotate(45)">45°</button>
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<button onclick="myDiagram.commandHandler.rotate(-45)">-45°</button>
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<button onclick="myDiagram.commandHandler.rotate(90)">90°</button>
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<button onclick="myDiagram.commandHandler.rotate(-90)">-90°</button>
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<button onclick="myDiagram.commandHandler.rotate(180)">180°</button>
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</br>
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Arrow Mode:
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<input type="radio" name="arrow" id="move" onclick="arrowMode()" checked="checked">Move</input>
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<input type="radio" name="arrow" id="select" onclick="arrowMode()">Select</input>
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<input type="radio" name="arrow" id="scroll" onclick="arrowMode()">Scroll</input>
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</p>
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<p>
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This example demonstrates a custom <a>CommandHandler</a>.
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It allows the user to position selected Parts in a diagram relative to each other,
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overrides <a>CommandHandler.doKeyDown</a> to allow handling the arrow keys in additional manners,
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and uses a "paste offset" so that pasting objects will cascade them rather than place them on top of one another.
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It is defined in its own file, as <a href="DrawCommandHandler.js">DrawCommandHandler.js</a>.
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</p>
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<p>
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The above buttons can be used to align Parts, rotate Parts, or change the behavior of the arrow keys.
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</p>
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<p>
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Usage can also be seen in the <a href="BPMN.html">BPMN Editor</a> sample.
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</p>
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</div>
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</body>
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</html> |