Getting started.

First, you need to own a valid Ogma lisense. Reach out Ogma sales for more details. Let's say you start from scratch, create a vue project with vue-cli:

vue create my-vue-ogma-app
cd my-vue-ogma-app

Or with vite:

npm init vite@latest my-vue-ogma-app
cd my-vue-ogma-app

Then, you need to install Ogma and Ogma-vue

Install Ogma and Ogma-vue

npm i @linkurious/ogma @linkurious/ogma-vue

Use Ogma-vue3 in your App

<template>
  <div>
    ...Your App
    <OgmaVue :graph="graph" :layoutOnMounted="true" />
  </div>
</template>

<script setup lang="ts">
import { Ogma as OgmaVue, RawGraph } from "@linkurious/ogma-vue";
import Ogma from "@linkurious/ogma";

const graph = ref<RawGraph>({
  nodes: [{ id: 1 }, { id: 2 }],
  edges: [{ id: 0, source: 1, target: 2 }],
});
</script>

That's it ! You have a fully functionnal Ogma instance within your app. To go further, we encourage you reading the components section to see how to add transformations, styles and more. You should check out as well the

Register to events

Some components provide events you can register to. Let's see how it works.

Ogma events

The list of events an Ogma instance can emit is available here. By default, OgmaVue will re-emit all of them, and you can register to them like this:

<OgmaVue @addNodes="onAddNodes" />

If you want to optimize performances, you can pass as a prop the list of events you want to register to:

<OgmaVue
  :events="[addNodes, addEdges]"
  :@addNodes="onAddNodes"
  :@addEdges="onAddEdges"
/>

This way, the Ogma component will only register to addNodes and addEdges events, and will ignore all others.

Transformations events

Tranformations for instance trigger enabled disabled, indexChanged, refreshed and destroyed.

<NodeFilter ...props :@refreshed="onFilterRefreshed" />

As for Ogma component, by default it will register and emit all events, but you can specify which ones you want to register to:

<NodeFilter ...props :events="[refreshed]" :@refreshed="onFilterRefreshed" />

See Ogma transformations events for further details.

Styling

Ogma provides a variety of APIs to add styles to your graph: Classes, EdgeRule, NodeRule and StyleRule.

Let's see how we can use them.

StyleClass

See component reference and createClass API for more details.

EdgeRule

See component reference and createClass API for more details.

NodeRule

See component reference and createClass API for more details.

StyleRule

See component reference and createClass API for more details.

Using tranformations

Adding tranformations in Ogma is easy, it allows you to filter, group nodes and edges, and do many more things.

Let's have a look at the transformations you will most likelly use:

Node Grouping

See component reference and addNodeGrouping API for more details.

Node Filter

See component reference and addNodeFilter API for more details.

Advices on tranformations

• Do not use conditional rendering to enable/disable your transformation, use the enabled prop instead.
• Check out Ogma examples and read the Ogma grouping tutorial.
• To layout the graph properly after a transformation has run, you can register to @refreshed events.

Using Tools

Ogma provides different tools to interract with the graph. You can use thoose tools simply by adding componenents to your app.

<Lasso :enabled="enabled" :options="lassoOptions" />

See component reference and lasso API for more details.

Custom components

Here is an example of a component that allows you to enable/disable node grouping and change the color of the nodes.

<template>
  <div class="ui">
    <n-button @click="onToggleGrouping">{{
      props.grouping.enabled ? "disable grouping" : "enable grouping"
    }}</n-button>
    <span>
      Node color
      <n-color-picker
        :default-value="props.rule.nodeAttributes.color"
        :on-update:value="onColorChange"
      />
    </span>
  </div>
</template>

<script setup lang="ts">
import Ogma from "@linkurious/ogma";
import { inject, onMounted, provide, watch } from "vue";
import { NodeFilterProps, StyleRuleProps } from "@linkurious/ogma-vue";

const props = defineProps<{
  filter: NodeFilterProps;
  rule: StyleRuleProps;
}>();

const emit = defineEmits<{
  (event: "update:grouping", value: NodeGroupingProps): void;
  (event: "update:rule", value: StyleRuleProps): void;
}>();

const ogma = inject<Ogma>("ogma");
function onToggleGrouping() {
  emit("update:grouping", {
    ...props.grouping,
    enabled: !props.grouping.enabled,
  });
}

function onColorChange(e) {
  emit("update:rule", {
    ...props.rule,
    nodeAttributes: {
      ...props.rule.nodeAttributes,
      color: e,
    },
  });
}
</script>

Which you can then use within your app:

<template>
  <Ogma :graph="graph">
    <template>
      <StyleRule :node-attributes="rule.nodeAttributes" />
      <NodeGrouping
        :options="grouping.options"
        :enabled="grouping.enabled"
        @enabled="onGroupingEnabled"
      />
      <Layer>
        <UX
          v-model:grouping="grouping"
          v-model:filter="filter"
          v-model:rule="rule"
        />
      </Layer>
    </template>
  </Ogma>
</template>

<script setup lang="ts">

import { defineProps, ref } from "vue";
import { Ogma, StyleRule, NodeGrouping, StyleRuleProps, Layer } from "@linkurious/ogma-vue";
import UX from './UX.vue';
import Ogma from "@linkurious/ogma";

const graph = ref<RawGraph>({
  nodes: [{ id: 1 }, { id: 2 }],
  edges: [{ id: 0, source: 1, target: 2 }],
});

const grouping = ref<NodeGroupingProps>({
  enabled: false,
  options: {},
});

const rule = ref<StyleRuleProps>({
  nodeAttributes: {
    color: "red",
  },
});