JavaScript/jQuery Diagram - nodes
Allows you to bind the collection of diagram nodes to a data source. For more information, see the Data Binding section.
containerChildrenExpr
Specifies the name of a data source field or an expression that provides a container's nested items.
This property is in effect for "verticalContainer" or "horizontalContainer" nodes.
You can also use the containerKeyExpr property to provide a container's content.
$(function() {
$("#diagram").dxDiagram({
nodes: {
dataSource: new DevExpress.data.ArrayStore({
key: "this",
data: orgItems
}),
keyExpr: "id",
parentKeyExpr: "parent_id",
containerKeyExpr: "team",
},
});
});
var orgItems = [
{
"id":"106",
"text":"Development",
"type":"ellipse"
},
{
"id":"110",
"text":"ASP.NET Team",
"type": "horizontalContainer",
"parent_id": "106",
"children": [
{
"id":"112",
"text":"Ana\nTrujillo",
"type":"rectangle",
},
{
"id":"113",
"text":"Antonio\nMoreno",
"type":"rectangle",
}]
}
];
containerKeyExpr
Specifies the name of a data source field or an expression that provides a key of a node's parent container node.
The parent container node must be of the "verticalContainer" or "horizontalContainer" type.
You can also use the containerChildrenExpr property to provide a container's content.
$(function() {
$("#diagram").dxDiagram({
nodes: {
dataSource: new DevExpress.data.ArrayStore({
key: "this",
data: orgItems
}),
keyExpr: "id",
parentKeyExpr: "parent_id",
containerKeyExpr: "team",
},
});
});
var orgItems = [
{
"id":"106",
"text":"Development",
"type":"ellipse"
},
{
"id":"110",
"text":"ASP.NET Team",
"type": "horizontalContainer",
"parent_id": "106",
},
{
"id":"112",
"text":"Ana\nTrujillo",
"type":"rectangle",
"team": "110"
},
{
"id":"113",
"text":"Antonio\nMoreno",
"type":"rectangle",
"team": "110"
},
];
dataSource
Binds the nodes collection to the specified data. For more information, see the Data Binding section.
heightExpr
The units property specifies the measurement unit.
imageUrlExpr
Specifies the name of a data source field or expression that provides an image URL or Base64 encoded image for a node.
This property is in effect for nodes of the "cardWithImageOnLeft", "cardWithImageOnTop", or "cardWithImageOnRight" type.
$(function() {
$("#diagram").dxDiagram({
nodes: {
dataSource: new DevExpress.data.ArrayStore({
key: "this",
data: orgItems
}),
imageUrlExpr: "picture",
},
edges: {
dataSource: new DevExpress.data.ArrayStore({
key: "this",
data: orgLinks
})
},
});
});
var orgItems = [
{
"id":"110",
"text":"ASP.NET\nTeam",
"type": "ellipse"
},
{
"id":"112",
"text":"Ken Samuelson",
"type": "cardWithImageOnLeft",
"picture": "images/employees/32.png"
},
{
"id":"113",
"text":"Terry Bradley",
"type": "cardWithImageOnLeft",
"picture": "images/employees/33.png"
},
];
var orgLinks = [
{
"id":"129",
"from":"110",
"to":"112",
},
{
"id":"130",
"from":"110",
"to":"113",
}
];
itemsExpr
Specify this property when your source data has a hierarchical structure.
$(function() {
$("#diagram").dxDiagram({
nodes: {
dataSource: new DevExpress.data.ArrayStore({
key: "this",
data: employees
}),
textExpr: "Title",
itemsExpr: "Items"
},
});
});
var employees = [{
"Full_Name": "John Heart",
"Title": "CEO",
"Items": [{
"Full_Name": "Arthur Miller",
"Title": "CTO",
"Items": [{
"Full_Name": "Brett Wade",
"Title": "IT Manager",
}, {
"Full_Name": "Barb Banks",
"Title": "Support Manager",
}]
}, {
"Full_Name": "Robert Reagan",
"Title": "CMO",
"Items": [{
"Full_Name": "Ed Holmes",
"Title": "Sales Manager",
}]
}]
}];leftExpr
Specifies the name of a data source field or an expression that provides the x-coordinate of a node's left border.
A node's x-coordinate specifies the distance between the left border of a diagram work area and the left border of a shape, in units.
lockedExpr
Specifies the name of a data source field or an expression whose values indicate whether a node is locked.
A locked item can not be moved, changed, or delete. Users can use the context menu to lock and unlock an item.
The specified field or expression should return true or false.
$(function() {
$("#diagram").dxDiagram({
nodes: {
dataSource: new DevExpress.data.ArrayStore({
key: "this",
data: orgItems
}),
textExpr: "Title",
parentKeyExpr: "Head_ID",
lockedExpr: itemLockedExpr,
},
});
function itemLockedExpr(obj, value) {
return obj.type === "group" ? "true" : "false";
}
});parentKeyExpr
Specifies the name of a data source field or an expression that provides a parent node key for a node.
styleExpr
A data source field specified by this property must contain inline style declarations in string format, for instance "fill: #d9d9d9; stroke: #999999".
If you provide a function for the styleExpr property, the function can return style settings as CSS rules presented in JSON format as well.
$(function() {
$("#diagram").dxDiagram({
nodes: {
styleExpr: itemStyleExpr,
//...
});
function itemStyleExpr(obj) {
let style = { "stroke": "#444444" };
if(obj.type === "group")
style["fill"] = "#f3f3f3";
return style;
}
});textStyleExpr
A data source field specified by this property must contain inline style declarations in string format, for instance "font-weight: bold; text-decoration: underline".
If you provide a function for the textStyleExpr property, the function can return style settings as CSS rules in JSON format.
$(function() {
$("#diagram").dxDiagram({
nodes: {
textStyleExpr: itemTextStyleExpr,
//...
});
function itemTextStyleExpr(obj) {
let style = { "font-weight": "bold" };
if(obj.level === "senior")
style["text-decoration"] = "underline";
return style;
}
});topExpr
Specifies the name of a data source field or an expression that provides the y-coordinate of a node's top border.
A node's y-coordinate specifies the distance between the top border of a diagram work area and the top border of a shape, in units.
typeExpr
The built-in shape types are shown in the Shape Types section.
$(function() {
$("#diagram").dxDiagram({
nodes: {
typeExpr: itemTypeExpr,
...
},
});
function itemTypeExpr(obj, value) {
if(value)
obj.type = (value === "rectangle") ? undefined : "group";
else
return obj.type === "group" ? "ellipse" : "rectangle";
}
});widthExpr
The units property specifies the measurement unit.