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CSS

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HTML 

              
                <div id="demo">
  <div id="paper"></div>
  <div id="inspector" style="position:relative;width:50%;height:100%;">
    <div class="inspector-buttons">
      <button class="inspector-tab-button" data-inspector="inspector-general">General</button>
      <button class="inspector-tab-button" data-inspector="inspector-attributes">Attributes</button>
      <button class="inspector-tab-button" data-inspector="inspector-operations">Operations</button>
    </div>
    <div id="inspector-general" class="inspector-tab"></div>
    <div id="inspector-attributes" class="inspector-tab"></div>
    <div id="inspector-operations" class="inspector-tab"></div>
  </div>
</div>
<a target="_blank" href="https://www.jointjs.com">
  <img id="logo" src="https://assets.codepen.io/7589991/jointjs-logo.svg" width="200" height="50"></img>
</a>
!

CSS 

              
                html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
}

#demo {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  align-content: center;
  justify-content: space-around;
  align-items: stretch;
  height: 100%;
}
#inspector {
  background: #333;
  position: relative;
  width: 50%;
  height: 100%;
}
.inspector-tab {
  position: relative;
  height: calc(100% - 30px);
}
.inspector-tab-button {
  background: #414548;
  color: #fff;
  height: 30px;
  border: none;
}
.inspector-tab-button.active {
  background: #5e6366;
}

.group[data-name="name"] .group-label,
.field[data-field="attributes"] > label,
.field[data-field="operations"] > label {
  display: none;
}
.joint-inspector {
  padding: 5px 0 0 0;
}

#logo {
  position: absolute;
  top: 0;
  right: 0;
  height: 30px;
  width: 100px;
  background: white;
}
!

JS 

              
                const { dia, ui, shapes, util } = joint;

joint.setTheme("dark");

const typeOptions = [
  {
    value: 0,
    content: "bool"
  },
  {
    value: 1,
    content: "currency"
  },
  {
    value: 2,
    content: "float"
  },
  {
    value: 3,
    content: "int"
  },
  {
    value: 4,
    content: "void"
  },
  {
    value: 5,
    content: "point"
  },
  {
    value: 6,
    content: "this"
  }
];

const visibilityOptions = [
  {
    value: "+",
    content: "Public"
  },
  {
    value: "-",
    content: "Private"
  },
  {
    value: "#",
    content: "Protected"
  },
  {
    value: "/",
    content: "Derived"
  },
  {
    value: "~",
    content: "Package"
  }
];

class UMLClass extends shapes.standard.HeaderedRecord {
  defaults() {
    return {
      ...super.defaults,
      type: "UMLClass",
      color: "#ffffff",
      outlineColor: "#333333",
      textColor: "#333333",
      headerColor: "#ffffff",
      size: { width: 300, height: 0 },
      itemOffset: 5,
      className: "",
      classType: ""
    };
  }

  initialize(...args) {
    super.initialize(...args);
    this.on("change", (cell, opt) => this.buildItems(opt));
    this.buildItems();
  }

  buildItems(opt = {}) {
    const thickness = 2;
    const {
      className = "",
      classType = "",
      color,
      outlineColor,
      textColor,
      headerColor,
      attributes = [],
      operations = []
    } = this.attributes;

    const buildTypeOptions = [...typeOptions, { value: 7, content: className }];

    const attributesItems = attributes.map((attribute, index) => {
      const {
        visibility = "+",
        name = "",
        returnType = 0,
        isStatic = false
      } = attribute;
      return {
        id: `attribute${index}`,
        label: `${name}: ${buildTypeOptions[returnType].content}`,
        icon: this.getVisibilityIcon(visibility, textColor),
        group: isStatic ? "static" : null
      };
    });
    if (attributesItems.length === 0) {
      attributesItems.push({
        id: "no_attributes"
      });
    }

    const operationsItems = operations.map((operation, index) => {
      const {
        visibility = "+",
        name = "",
        returnType = 0,
        parameters = [],
        isStatic = false
      } = operation;

      const nameParams = parameters
        ? parameters.map((parameter) => {
            const { name = "", type = 0 } = parameter;
            return `${name}: ${buildTypeOptions[type].content}`;
          })
        : [];

      return {
        id: `operation${index}`,
        label: `${name}(${nameParams.join(",")}): ${
          buildTypeOptions[returnType].content
        }`,
        icon: this.getVisibilityIcon(visibility, textColor),
        group: isStatic ? "static" : null
      };
    });
    if (operationsItems.length === 0) {
      operationsItems.push({
        id: "no_operations"
      });
    }

    let headerHeight = 30;
    let headerText = className;

    if (classType) {
      headerText = `<<${classType}>>\n${headerText}`;
      headerHeight *= 2;
    }

    this.set(
      {
        padding: { top: headerHeight },
        typeOptions: buildTypeOptions,
        attrs: util.defaultsDeep(
          {
            body: {
              stroke: outlineColor,
              strokeWidth: thickness,
              fill: color
            },
            header: {
              stroke: outlineColor,
              strokeWidth: thickness,
              height: headerHeight,
              fill: headerColor
            },
            headerLabel: {
              text: headerText,
              textWrap: {
                height: headerHeight,
                width: "calc(w-10)",
                preserveSpaces: true,
                ellipsis: true
              },
              fontFamily: "sans-serif",
              refY: null,
              y: headerHeight / 2,
              lineHeight: 30,
              fill: textColor
            },
            itemLabels: {
              fontFamily: "sans-serif",
              fill: textColor
            },
            itemLabels_static: {
              textDecoration: "underline"
            },
            itemBody_delimiter: {
              fill: outlineColor
            }
          },
          this.attr()
        ),
        items: [
          [
            ...attributesItems,
            {
              id: "delimiter",
              height: thickness,
              label: ""
            },
            ...operationsItems
          ]
        ]
      },
      opt
    );
  }

  getVisibilityIcon(visibility, color) {
    const d = {
      "+": "M 8 0 V 16 M 0 8 H 16",
      "-": "M 0 8 H 16",
      "#": "M 5 0 3 16 M 0 5 H 16 M 12 0 10 16 M 0 11 H 16",
      "~": "M 0 8 A 4 4 1 1 1 8 8 A 4 4 1 1 0 16 8",
      "/": "M 12 0 L 4 16"
    }[visibility];
    return `data:image/svg+xml;utf8,${encodeURIComponent(`<svg
                xmlns="http://www.w3.org/2000/svg"
                xmlns:xlink="http://www.w3.org/1999/xlink"
                version="1.1"
                viewBox="-3 -3 22 22"
            >
                <path d="${d}" stroke="${color}" stroke-width="2" fill="none"/>
            </svg>`)}`;
  }
}

shapes.UMLClass = UMLClass;
shapes.UMLClassView = shapes.standard.HeaderedRecordView;

const graph = new dia.Graph({}, { cellNamespace: shapes });
const paper = new dia.Paper({
  el: document.getElementById("paper"),
  model: graph,
  cellViewNamespace: shapes,
  width: "50%",
  height: "100%",
  gridSize: 20,
  drawGrid: { name: "mesh" },
  async: true,
  sorting: dia.Paper.sorting.APPROX
});

const umlClass1 = new UMLClass({
  className: "Shape",
  classType: "interface",
  outlineColor: "#ff9580",
  color: "#ffeae5",
  headerColor: "#ffd4cc",
  textColor: "#002b33",
  itemHeight: 25,
  attributes: [
    {
      visibility: "-",
      name: "x",
      returnType: 2
    },
    {
      visibility: "-",
      name: "y",
      returnType: 2
    }
  ],
  operations: [
    {
      visibility: "+",
      name: "getPosition",
      parameters: [],
      returnType: 5
    },
    {
      visibility: "+",
      name: "setPosition",
      parameters: [
        { name: "x", type: 2 },
        { name: "y", type: 2 }
      ],
      returnType: 4
    },
    {
      visibility: "+",
      name: "isShape",
      parameters: [{ name: "shape", type: 7 }],
      returnType: 0,
      isStatic: true
    }
  ]
});

graph.addCells([umlClass1]);

const inspectorGeneral = new ui.Inspector({
  cell: umlClass1,
  inputs: {
    className: {
      type: "text",
      group: "name",
      label: "Class name"
    },
    classType: {
      type: "text",
      group: "name",
      label: "Class type"
    },
    color: {
      type: "color",
      group: "presentation",
      label: "Color"
    },
    headerColor: {
      type: "color",
      group: "presentation",
      label: "Header Color"
    },
    outlineColor: {
      type: "color",
      group: "presentation",
      label: "Outline color"
    },
    textColor: {
      type: "color",
      group: "presentation",
      label: "Text color"
    }
  },
  groups: {
    name: {
      index: 1
    },
    presentation: {
      index: 2
    }
  }
});

inspectorGeneral.render();
document.getElementById("inspector-general").appendChild(inspectorGeneral.el);

const inspectorAttributes = new ui.Inspector({
  cell: umlClass1,
  inputs: {
    attributes: {
      type: "list",
      addButtonLabel: "Add Attribute",
      item: {
        type: "object",
        properties: {
          name: {
            type: "text",
            label: "Attribute",
            index: 1
          },
          visibility: {
            type: "select",
            options: visibilityOptions,
            label: "Visibility",
            index: 2
          },
          returnType: {
            type: "select",
            options: "typeOptions",
            label: "Return type",
            index: 3
          },
          isStatic: {
            type: "toggle",
            index: 4,
            label: "Static Attribute"
          }
        }
      }
    }
  }
});

inspectorAttributes.render();
document
  .getElementById("inspector-attributes")
  .appendChild(inspectorAttributes.el);

const inspectorOperations = new ui.Inspector({
  cell: umlClass1,
  inputs: {
    operations: {
      type: "list",
      addButtonLabel: "Add Operation",
      item: {
        type: "object",
        properties: {
          name: {
            type: "text",
            label: "Operation",
            index: 1
          },
          visibility: {
            type: "select",
            options: visibilityOptions,
            label: "Visibility",
            index: 2
          },
          returnType: {
            type: "select",
            options: "typeOptions",
            label: "Return type",
            index: 3
          },
          isStatic: {
            type: "toggle",
            index: 4,
            label: "Static Operation"
          },
          parameters: {
            type: "list",
            item: {
              type: "object",
              properties: {
                name: {
                  type: "text",
                  index: 1,
                  label: "Parameter name"
                },
                type: {
                  type: "select",
                  options: "typeOptions",
                  index: 2,
                  label: "Parameter type"
                }
              }
            },
            label: "Parameters",
            index: 5
          }
        }
      }
    }
  }
});

inspectorOperations.render();
document
  .getElementById("inspector-operations")
  .appendChild(inspectorOperations.el);

function openTab(tabName) {
  const t = document.getElementsByClassName("inspector-tab");
  for (let i = 0; i < t.length; i++) {
    t[i].style.display = t[i].id === tabName ? "block" : "none";
  }
  const b = document.getElementsByClassName("inspector-tab-button");
  for (let i = 0; i < b.length; i++) {
    b[i].classList.toggle("active", b[i].dataset.inspector === tabName);
  }
}

document.getElementById("inspector").addEventListener("click", (evt) => {
  if (!evt.target.classList.contains("inspector-tab-button")) return;
  openTab(evt.target.dataset.inspector);
});

openTab("inspector-general");

paper.translate(paper.getArea().width / 2 - umlClass1.size().width / 2, 20);
!
999px

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