How can I set diagram’s model if I want to draw my diagram (schema) from scratch? The main diagram is empty at the beginning.
Here’s the code:
var red = "orangered"; // 0 or false
var green = "forestgreen"; // 1 or true
var blue = "blue";
var aqua = "aqua";
var white = "white";
var dollarbill = "#85BB65";
var myDiagram;
function initElectricalShema() {
//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", // create a new Diagram in the HTML DIV element "myDiagramDiv"
{
initialContentAlignment: go.Spot.Center,
allowDrop: true, // Nodes from the Palette can be dropped into the Diagram
//"draggingTool.isGridSnapEnabled": true, // dragged nodes will snap to a grid of 10x10 cells
"undoManager.isEnabled": true
});
// when the document is modified, add a "*" to the title and enable the "Save" button
myDiagram.addDiagramListener("Modified", function (e) {
var button = document.getElementById("saveModel");
if (button) button.disabled = !myDiagram.isModified;
var idx = document.title.indexOf("*");
if (myDiagram.isModified) {
if (idx < 0) document.title += "*";
} else {
if (idx >= 0) document.title = document.title.substr(0, idx);
}
});
var palette = new go.Palette("palette"); // create a new Palette in the HTML DIV element "palette"
// creates relinkable Links that will avoid crossing Nodes when possible and will jump over other Links in their paths
myDiagram.linkTemplate =
$(go.Link,
{
//routing: go.Link.AvoidsNodes,
//curve: go.Link.JumpOver,
//corner: 3,
relinkableFrom: true, relinkableTo: true,
selectionAdorned: false, // Links are not adorned when selected so that their color remains visible.
shadowOffset: new go.Point(0, 0), shadowBlur: 5, shadowColor: "blue"
},
new go.Binding("isShadowed", "isSelected").ofObject(),
$(go.Shape,
{ name: "SHAPE", strokeWidth: 2, stroke: red }));
// node template helpers
var sharedToolTip =
$(go.Adornment, "Auto",
$(go.Shape, "RoundedRectangle", { fill: "lightyellow" }),
$(go.TextBlock, { margin: 2 },
new go.Binding("text", "", function (d) { return d.category; })));
// define some common property settings
function nodeStyle() {
return [new go.Binding("location", "loc", go.Point.parse).makeTwoWay(go.Point.stringify),
new go.Binding("isShadowed", "isSelected").ofObject(),
{
selectionAdorned: false,
shadowOffset: new go.Point(0, 0),
shadowBlur: 15,
shadowColor: "blue",
toolTip: sharedToolTip
}];
}
function shapeStyle1() {
return {
name: "NODESHAPE",
fill: "lightgray",
stroke: "darkslategray",
desiredSize: new go.Size(40, 40),
strokeWidth: 2
};
}
function shapeStyle2() {
return {
name: "NODESHAPE1",
fill: "aqua",
stroke: "yellow",
desiredSize: new go.Size(40, 40),
strokeWidth: 2
};
}
function shapeStyle3() {
return {
name: "NODESHAPE2",
fill: "dollarbill",
stroke: "darkgreen",
desiredSize: new go.Size(10, 40),
strokeWidth: 2
};
}
function shapeStyle4() {
return {
name: "NODESHAPE3",
fill: "green",
stroke: "green",
desiredSize: new go.Size(1, 4),
strokeWidth: 2
};
}
function shapeStyle5() {
return {
name: "NODESHAPE4",
fill: "green",
stroke: "green",
desiredSize: new go.Size(1, 10),
strokeWidth: 2
};
}
function portStyle(input) {
return {
desiredSize: new go.Size(6, 6),
fill: "black",
fromSpot: go.Spot.Right,
fromLinkable: !input,
toSpot: go.Spot.Left,
toLinkable: input,
toMaxLinks: 2,
cursor: "pointer"
};
}
function portStyle1(input) {
return {
desiredSize: new go.Size(2, 2),
fill: "green",
//fromSpot: go.Spot.Center,
fromLinkable: input,
//toSpot: go.Spot.Center,
toLinkable: !input,
toMaxLinks: 2,
cursor: "pointer"
};
}
function portStyle2(input) {
return {
desiredSize: new go.Size(2, 2),
fill: "green",
//fromSpot: go.Spot.Center,
fromLinkable: !input,
//toSpot: go.Spot.Center,
toLinkable: input,
toMaxLinks: 2,
cursor: "pointer"
};
}
// define templates for each type of node
var inputTemplate =
$(go.Node, "Spot", nodeStyle(),
$(go.Shape, "Circle", shapeStyle1(),
{ fill: red }), // override the default fill (from shapeStyle1()) to be red
$(go.Shape, "Rectangle", portStyle(false), // the only port
{ portId: "", alignment: new go.Spot(1, 0.5) }),
{ // if double-clicked, an input node will change its value, represented by the color.
doubleClick: function (e, obj) {
e.diagram.startTransaction("Toggle Input");
var shp = obj.findObject("NODESHAPE");
shp.fill = (shp.fill === green) ? red : green;
updateStates();
e.diagram.commitTransaction("Toggle Input");
}
}
);
var outputTemplate =
$(go.Node, "Spot", nodeStyle(),
$(go.Shape, "Rectangle", shapeStyle1(),
{ fill: green }), // override the default fill (from shapeStyle1()) to be green
$(go.Shape, "Rectangle", portStyle(true), // the only port
{ portId: "", alignment: new go.Spot(0, 0.5) })
);
var andTemplate =
$(go.Node, "Spot", nodeStyle(),
$(go.Shape, "AndGate", shapeStyle1()),
$(go.Shape, "Rectangle", portStyle(true),
{ portId: "in1", alignment: new go.Spot(0, 0.3) }),
$(go.Shape, "Rectangle", portStyle(true),
{ portId: "in2", alignment: new go.Spot(0, 0.7) }),
$(go.Shape, "Rectangle", portStyle(false),
{ portId: "out", alignment: new go.Spot(1, 0.5) })
);
var orTemplate =
$(go.Node, "Spot", nodeStyle(),
$(go.Shape, "OrGate", shapeStyle1()),
$(go.Shape, "Rectangle", portStyle(true),
{ portId: "in1", alignment: new go.Spot(0.16, 0.3) }),
$(go.Shape, "Rectangle", portStyle(true),
{ portId: "in2", alignment: new go.Spot(0.16, 0.7) }),
$(go.Shape, "Rectangle", portStyle(false),
{ portId: "out", alignment: new go.Spot(1, 0.5) })
);
var xorTemplate =
$(go.Node, "Spot", nodeStyle(),
$(go.Shape, "XorGate", shapeStyle1()),
$(go.Shape, "Rectangle", portStyle(true),
{ portId: "in1", alignment: new go.Spot(0.26, 0.3) }),
$(go.Shape, "Rectangle", portStyle(true),
{ portId: "in2", alignment: new go.Spot(0.26, 0.7) }),
$(go.Shape, "Rectangle", portStyle(false),
{ portId: "out", alignment: new go.Spot(1, 0.5) })
);
var norTemplate =
$(go.Node, "Spot", nodeStyle(),
$(go.Shape, "NorGate", shapeStyle1()),
$(go.Shape, "Rectangle", portStyle(true),
{ portId: "in1", alignment: new go.Spot(0.16, 0.3) }),
$(go.Shape, "Rectangle", portStyle(true),
{ portId: "in2", alignment: new go.Spot(0.16, 0.7) }),
$(go.Shape, "Rectangle", portStyle(false),
{ portId: "out", alignment: new go.Spot(1, 0.5) })
);
var xnorTemplate =
$(go.Node, "Spot", nodeStyle(),
$(go.Shape, "XnorGate", shapeStyle1()),
$(go.Shape, "Rectangle", portStyle(true),
{ portId: "in1", alignment: new go.Spot(0.26, 0.3) }),
$(go.Shape, "Rectangle", portStyle(true),
{ portId: "in2", alignment: new go.Spot(0.26, 0.7) }),
$(go.Shape, "Rectangle", portStyle(false),
{ portId: "out", alignment: new go.Spot(1, 0.5) })
);
var nandTemplate =
$(go.Node, "Spot", nodeStyle(),
$(go.Shape, "NandGate", shapeStyle1()),
$(go.Shape, "Rectangle", portStyle(true),
{ portId: "in1", alignment: new go.Spot(0, 0.3) }),
$(go.Shape, "Rectangle", portStyle(true),
{ portId: "in2", alignment: new go.Spot(0, 0.7) }),
$(go.Shape, "Rectangle", portStyle(false),
{ portId: "out", alignment: new go.Spot(1, 0.5) })
);
var notTemplate =
$(go.Node, "Spot", nodeStyle(),
$(go.Shape, "Inverter", shapeStyle1()),
$(go.Shape, "Rectangle", portStyle(true),
{ portId: "in", alignment: new go.Spot(0, 0.5) }),
$(go.Shape, "Rectangle", portStyle(false),
{ portId: "out", alignment: new go.Spot(1, 0.5) })
);
var custom1Template =
$(go.Node, "Spot", nodeStyle(),
$(go.Shape, "Rectangle", shapeStyle2(),
{ fill: blue }), // override the default fill (from shapeStyle1()) to be green
$(go.Shape, "Rectangle", portStyle(true), // the only port
{ portId: "", alignment: new go.Spot(0, 0.5) })
);
var custom2Template =
$(go.Node, "Vertical",
$(go.Shape, "Circle", shapeStyle1(),
{ fill: white }), // override the default fill (from shapeStyle1()) to be green
$(go.Shape, "Rectangle", shapeStyle4(),
{ fill: green }), // override the default fill (from shapeStyle1()) to be green
$(go.Shape, "Rectangle", shapeStyle3(),
{ fill: dollarbill }), // override the default fill (from shapeStyle1()) to be green
$(go.Shape, "Rectangle", shapeStyle5(),
{ fill: green }), // override the default fill (from shapeStyle1()) to be green
$(go.Shape, "Rectangle", portStyle1(true), // the only port
{ portId: "" }),
$(go.Shape, "Rectangle", portStyle2(true), // the only port
{ portId: "" })
);
// add the templates created above to myDiagram and palette
myDiagram.nodeTemplateMap.add("input", inputTemplate);
myDiagram.nodeTemplateMap.add("output", outputTemplate);
myDiagram.nodeTemplateMap.add("and", andTemplate);
myDiagram.nodeTemplateMap.add("or", orTemplate);
myDiagram.nodeTemplateMap.add("xor", xorTemplate);
myDiagram.nodeTemplateMap.add("not", notTemplate);
myDiagram.nodeTemplateMap.add("nand", nandTemplate);
myDiagram.nodeTemplateMap.add("nor", norTemplate);
myDiagram.nodeTemplateMap.add("xnor", xnorTemplate);
myDiagram.nodeTemplateMap.add("custom1", custom1Template);
myDiagram.nodeTemplateMap.add("custom2", custom2Template);
// share the template map with the Palette
palette.nodeTemplateMap = myDiagram.nodeTemplateMap;
palette.model.nodeDataArray = [
{ category: "input" },
{ category: "output" },
{ category: "and" },
{ category: "or" },
{ category: "xor" },
{ category: "not" },
{ category: "nand" },
{ category: "nor" },
{ category: "xnor" },
{ category: "custom1" },
{ category: "custom2" }
];
// load the initial diagram
load();
// continually update the diagram
loop();
}
// update the diagram every 250 milliseconds
function loop() {
setTimeout(function () { updateStates(); loop(); }, 250);
}
// update the value and appearance of each node according to its type and input values
function updateStates() {
var oldskip = myDiagram.skipsUndoManager;
myDiagram.skipsUndoManager = true;
// do all "input" nodes first
myDiagram.nodes.each(function (node) {
if (node.category === "input") {
doInput(node);
}
});
// now we can do all other kinds of nodes
myDiagram.nodes.each(function (node) {
switch (node.category) {
case "and": doAnd(node); break;
case "or": doOr(node); break;
case "xor": doXor(node); break;
case "not": doNot(node); break;
case "nand": doNand(node); break;
case "nor": doNor(node); break;
case "xnor": doXnor(node); break;
case "output": doOutput(node); break;
case "custom1": doCustom1(node); break;
case "custom2": doCustom2(node); break;
case "input": break; // doInput already called, above
}
});
myDiagram.skipsUndoManager = oldskip;
}
// helper predicate
function linkIsTrue(link) { // assume the given Link has a Shape named "SHAPE"
return link.findObject("SHAPE").stroke === green;
}
// helper function for propagating results
function setOutputLinks(node, color) {
node.findLinksOutOf().each(function (link) { link.findObject("SHAPE").stroke = color; });
}
// update nodes by the specific function for its type
// determine the color of links coming out of this node based on those coming in and node type
function doInput(node) {
// the output is just the node's Shape.fill
setOutputLinks(node, node.findObject("NODESHAPE").fill);
}
function doAnd(node) {
var color = node.findLinksInto().all(linkIsTrue) ? green : red;
setOutputLinks(node, color);
}
function doNand(node) {
var color = !node.findLinksInto().all(linkIsTrue) ? green : red;
setOutputLinks(node, color);
}
function doNot(node) {
var color = !node.findLinksInto().all(linkIsTrue) ? green : red;
setOutputLinks(node, color);
}
function doOr(node) {
var color = node.findLinksInto().any(linkIsTrue) ? green : red;
setOutputLinks(node, color);
}
function doNor(node) {
var color = !node.findLinksInto().any(linkIsTrue) ? green : red;
setOutputLinks(node, color);
}
function doXor(node) {
var truecount = 0;
node.findLinksInto().each(function (link) { if (linkIsTrue(link)) truecount++; });
var color = truecount % 2 === 0 ? green : red;
setOutputLinks(node, color);
}
function doXnor(node) {
var truecount = 0;
node.findLinksInto().each(function (link) { if (linkIsTrue(link)) truecount++; });
var color = truecount % 2 !== 0 ? green : red;
setOutputLinks(node, color);
}
function doOutput(node) {
// assume there is just one input link
// we just need to update the node's Shape.fill
node.linksConnected.each(function (link) { node.findObject("NODESHAPE").fill = link.findObject("SHAPE").stroke; });
}
function doCustom1(node) {
// assume there is just one input link
// we just need to update the node's Shape.fill
node.linksConnected.each(function (link) { node.findObject("NODESHAPE1").fill = link.findObject("SHAPE").stroke; });
}
function doCustom2(node) {
// assume there is just one input link
// we just need to update the node's Shape.fill
node.linksConnected.each(function (link) { node.findObject("NODESHAPE1").fill = link.findObject("SHAPE").stroke; });
}
// save a model to and load a model from JSON text, displayed below the Diagram
function save() {
document.getElementById("mySavedModel").value = myDiagram.model.toJson();
//alert(myDiagram.model.toJson());
myDiagram.isModified = false;
}
function load() {
myDiagram.model = go.Model.fromJson(document.getElementById("mySavedModel").value);
}
The element is jumping only when I drop it on main diagram for the first time. There’s no jumping after that. Could you tell me, please, what should I change in my code to avoid jumping at the beginning?