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CSS

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JavaScript

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HTML 

              
                <div id="stencil-container"></div>
<div id="images-container"></div>
<div id="paper-container"></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 

              
                #stencil-container {
  position: absolute;
  left: 0;
  top: 0;
  width: 140px;
  bottom: 0;
}

#images-container {
  position: absolute;
  right: 0;
  top: 0;
  width: 160px;
  bottom: 0;
}

#paper-container {
  position: absolute;
  right: 160px;
  top: 0;
  left: 140px;
  bottom: 0;
}

#logo {
  position: absolute;
  bottom: 20px;
  right: 140px;
}

.invalid-drop rect {
  stroke: red;
}
!

JS 

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

const graph = new dia.Graph({}, { cellNamespace: shapes });

const paper = new dia.Paper({
  model: graph,
  cellViewNamespace: shapes,
  width: "100%",
  height: "100%",
  gridSize: 20,
  drawGrid: { name: "mesh" },
  async: true,
  sorting: dia.Paper.sorting.APPROX,
  background: { color: "#F3F7F6" }
});

document.getElementById("paper-container").appendChild(paper.el);

// Create Record & Images stencils

const stencil = new ui.Stencil({
  paper,
  usePaperGrid: true,
  width: 140,
  paperOptions: () => {
    return {
      model: new dia.Graph({}, { cellNamespace: shapes }),
      cellViewNamespace: shapes,
      background: {
        color: "#FCFCFC"
      }
    };
  },
  layout: {
    columns: 1,
    rowHeight: "compact",
    rowGap: 10,
    columnWidth: 140,
    marginY: 10,
    // reset defaults
    resizeToFit: false,
    dx: 0,
    dy: 0
  }
});

stencil.render();
document.getElementById("stencil-container").appendChild(stencil.el);

const stencilImages = new ui.Stencil({
  paper,
  usePaperGrid: true,
  width: 160,
  paperOptions: () => {
    return {
      model: new dia.Graph({}, { cellNamespace: shapes }),
      cellViewNamespace: shapes,
      background: {
        color: "#FCFCFC"
      }
    };
  },
  layout: {
    columns: 3,
    rowHeight: "compact",
    rowGap: 10,
    columnWidth: 50,
    marginY: 10,
    // reset defaults
    resizeToFit: false,
    dx: 0,
    dy: 0
  }
});

stencilImages.render();
document.getElementById("images-container").appendChild(stencilImages.el);

// Fetch data and populate the stencil

fetch("https://picsum.photos/v2/list?limit=100")
  .then((response) => response.json())
  .then((data) => {
    const images = data.map((image, index) => {
      return {
        type: "standard.BorderedImage",
        size: { width: 40, height: 40 },
        author: image.author,
        attrs: {
          image: {
            href: `https://picsum.photos/id/${image.id}/40/40`
          }
        }
      };
    });
    stencilImages.load(images);
    stencilImages.fitPaperToContent(stencil.getPaper());
  });

stencil.load([
  {
    type: "standard.HeaderedRecord",
    size: { width: 120, height: 240 },
    itemHeight: 50,
    itemOffset: 0,
    itemIcon: { width: 40, height: 40, padding: 5 },
    items: [[]],
    padding: { top: 30, left: 0, right: 15 },
    scrollTop: 0,
    itemOverflow: true,
    attrs: {
      body: {
        strokeWidth: 1,
        stroke: "#ccc",
        fill: "#fff"
      },
      header: {
        strokeWidth: 1,
        stroke: "#333",
        fill: "#333"
      },
      headerLabel: {
        text: "Image Collection",
        fontFamily: "sans-serif",
        fontSize: 12,
        fill: "#fff"
      },
      itemLabels: {
        fontFamily: "sans-serif",
        fontSize: 10
      }
    }
  }
]);

// Insert an image into a Record shape

let outline = null;

stencilImages.on("element:drag", (cloneView, evt, bbox) => {
  if (outline) {
    outline.remove();
    outline = null;
  }
  const [el] = graph.findModelsInArea(bbox);
  if (el) {
    cloneView.el.classList.remove("invalid-drop");
    outline = highlighters.stroke.add(el.findView(paper), "body", "outline", {
      padding: 6,
      attrs: {
        stroke: "#4666E5",
        "stroke-width": 3,
        "stroke-linecap": "butt",
        "stroke-linejoin": "miter"
      }
    });
  } else {
    cloneView.el.classList.add("invalid-drop");
  }
});

stencilImages.on("element:dragend", (cloneView, evt, bbox) => {
  const [el] = graph.findModelsInArea(bbox);
  stencilImages.cancelDrag({ dropAnimation: !el });
  if (el) {
    const { model } = cloneView;
    el.addItemAtIndex(0, Infinity, {
      id: util.uuid(),
      label: model.get("author"),
      icon: model.attr("image/href")
    });
    if (!el.isEveryItemInView()) {
      el.setScrollTop(Number.MAX_VALUE);
    }
    if (outline) {
      outline.remove();
      outline = null;
    }
  }
});

// Add Record scrollbars

graph.on("add", (el) => {
  if (el.get("type") === "standard.HeaderedRecord") {
    el.findView(paper).addTools(
      new dia.ToolsView({
        tools: [new elementTools.RecordScrollbar({ rightAlign: true })]
      })
    );
  }
});

paper.on("element:mousewheel", (elementView, evt, x, y, delta) => {
  evt.preventDefault();
  const el = elementView.model;
  if (el.get("type") === "standard.HeaderedRecord") {
    if (!el.isEveryItemInView()) {
      el.setScrollTop(el.getScrollTop() + delta * 10);
    }
  }
});
!
999px

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