How to Perform Clipboard Operation Context Menu in Vue Diagram?

This article explains how to perform clipboard operations using the context menu in the Vue Diagram. In Syncfusion® Vue Diagram, enable the context menu by setting the show property of the contextMenuSettings to true. To display only the custom context menu, set showCustomMenuOnly to true. When a user clicks on an item in the context menu associated with a diagram node or connector, the contextMenuClick event is triggered.

To implement cut, copy, and paste functionality for multiple nodes using the context menu, follow these steps:

Cut Functionality

• When the “Cut” option is clicked in the context menu, create an empty array, and push the selected nodes into the array.
• Remove the nodes from the diagram.

<ejs-diagram
         ref="diagramObject"
         id="diagram"
         :width="width"
         :height="height"
         :nodes="nodes"
         :contextMenuSettings="contextMenuSettings"
         :contextMenuClick="contextMenuClick"
></ejs-diagram>

// Cut functionality
if (args.item.id == 'cut') {
 if (diagram.selectedItems.nodes && diagram.selectedItems.nodes.length > 0) {
   copyNode = [];
   for (let i = 0; i < diagram.selectedItems.nodes.length; i++) {
     copyNode.push(diagram.selectedItems.nodes[i]);
     diagram.remove(diagram.selectedItems.nodes[i]);
   }
 }
} 

Copy Functionality

When the “Copy” option is clicked in the context menu, create an empty array, and push the selected nodes into the array.

// Copy functionality

if (args.item.id == 'copy') {
 if (diagram.selectedItems.nodes && diagram.selectedItems.nodes.length > 0) {
   copyNode = [];
   for (let i = 0; i < diagram.selectedItems.nodes.length; i++) {
     copyNode.push(diagram.selectedItems.nodes[i]);
   }
 }
}

Paste Functionality

• When the “Paste” option is clicked in the context menu, retrieve the copied nodes from the array.
• Iterate over the copied nodes and create new nodes based on the copied node’s properties.
• Adjust the offsetX and offsetY properties of the new nodes based on the mouse position to paste them at the desired location.
• Add the newly created nodes to the diagram.

// Paste functionality
if (args.item.id == 'paste') {
     for (let i = 0; i < copyNode.length; i++) {
      args.cancel=true;
       let pasteNode = [
         {
           id: randomId() + i,
           width: copyNode[i].width,
           height: copyNode[i].height,
           shape: copyNode[i].shape,
           offsetX: args.event.pageX,
           offsetY: args.event.pageY,
         },
       ];
       if (i > 0) {
         pasteNode[0].offsetX =
           args.event.pageX + (copyNode[i].offsetX - copyNode[0].offsetX);
         pasteNode[0].offsetY =
           args.event.pageY + (copyNode[i].offsetY - copyNode[0].offsetY);
       }
       diagram.add(pasteNode[0]);
     }
   }

Refer to the working sample for additional details and implementation: Sample

Conclusion

We hope you enjoyed learning how to perform clipboard operations using the context menu in Vue Diagram.

You can refer to our Vue Diagram feature tour page to learn about its other groundbreaking feature representations and documentation, and how to quickly get started with configuration specifications. You can also explore our Vue Diagram example to understand how to create and manipulate data.

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