How to include lengthy text in the context menu of a JavaScript Diagram?

This article explains how to include lengthy text in the context menu of a JavaScript diagram.

In a graphical user interface (GUI), the Context Menu, triggered by a right-click, enhances user interaction by providing specific actions related to the clicked item. When dealing with extensive textual content in the context menu, it is essential to ensure proper display without overlapping other menu items.

To incorporate lengthy text into a context menu item in a JavaScript Diagram, the contextMenuBeforeItemRender event can be utilized. This event allows customization before each context menu item is rendered, enabling adjustments to the appearance and behavior of menu items.

To prevent the overlap of long text with adjacent menu items, set the display property to content/inline for the specific context menu item. The diagram will automatically align and expand the width based on the size of the text content.

Consider the following code snippet as an example:

//Initialize the diagram    diagram = new ej.diagrams.Diagram({
      width: '100%', height: '645px', nodes: nodes, connectors: connections,    
      //Enables the context menu
      contextMenuSettings: {
        show: true,
        items: [
          {
            text: 'Cut  ',
            id: 'Cut',
            target: '.e-diagramcontent',
            iconCss: 'e-Cut',
          },
          {
            text: 'Copy  ',
            id: 'Copy',
            target: '.e-diagramcontent',
            iconCss: 'e-Copy',
          },
        ],
        // Hides the default context menu items
        showCustomMenuOnly: true,
      },
      contextMenuBeforeItemRender: contextMenuBeforeItemRender,
    });
   diagram.appendTo('#diagram');
    function contextMenuBeforeItemRender(args) {
        let shortCutSpan = document.createElement('span');
        let text = args.item.text;
        let shortCutText =
          text === 'Cut  '
            ? 'In graphical user interface (GUI), a context menu is a type of menu that appears when you perform right-click operation'
            : text === 'Copy  '
            ? 'Ctrl + U'
            : 'Ctrl + Shift + I';
        shortCutSpan.textContent = shortCutText;
        
        args.element.appendChild(shortCutSpan);
      
        shortCutSpan.setAttribute('class', 'shortcut');

      }
document.addEventListener('contextmenu', () => {

       
        const cut = document.getElementById('Cut');
        cut.style.display = 'contents';
});

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

Conclusion

We hope you enjoyed learning about how to Include lengthy text in the context menu of a JavaScript Diagram.

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

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