RichEditBuilder.OnContextMenuShowing(String) Method

Assigns an event handler to the ContextMenuShowing event.

Namespace: DevExpress.AspNetCore.RichEdit

Assembly: DevExpress.AspNetCore.RichEdit.v25.1.dll

NuGet Package: DevExpress.AspNetCore.RichEdit

Declaration

public RichEditBuilder OnContextMenuShowing(
    string callback
)

Parameters

Name	Type	Description
callback	String	The name of the JavaScript function or the JavaScript function code used to handle the event.

Returns

Type	Description
RichEditBuilder	The builder for the Rich Text Editor.

Remarks

The ContextMenuShowing event occurs before the context menu is shown and allows you to customize the menu. The event handler receives an argument of the ContextMenuShowingEventArgs type. The argument’s properties provide information specific to this event.

Razor C#

@(Html.DevExpress().RichEdit("richEdit")
   .OnInit("onInit")
   .OnCustomCommandExecuted("onCustomCommandExecuted")
   .OnContextMenuShowing("onContextMenuShowing")
   // ...
)

JS

var customizedOnEventItemId = 'customizedOnEventId';
var googleSearchId = 'googleSearchId';

function onInit(s) {
    s.contextMenu.insertItem(new DevExpress.RichEdit.ContextMenuItem(customizedOnEventItemId, {
        icon: 'coffee', beginGroup: true, text: 'Customized on event', visible: false, disabled: true
    }), 0);
    s.contextMenu.insertItem(new DevExpress.RichEdit.ContextMenuItem(googleSearchId, {
        icon: 'search', beginGroup: true, text: 'Google Search...'
    }), 1);
    s.contextMenu.removeItem(DevExpress.RichEdit.ContextMenuCommandId.DecreaseParagraphIndent);
    s.contextMenu.removeItem(DevExpress.RichEdit.ContextMenuCommandId.IncreaseParagraphIndent);
    s.contextMenu.insertItem(new DevExpress.RichEdit.ContextMenuItem(DevExpress.RichEdit.MailMergeTabCommandId.CreateDateField, {
        icon: 'clock', text: 'Insert Date Field'
    }), 1);
}
function onContextMenuShowing(s, e) {
    var characterProperties = s.selection.activeSubDocument.getCharacterProperties(s.selection.intervals[0]);
    if (characterProperties.bold === true || characterProperties.bold === undefined) {
        e.contextMenu.removeItem(DevExpress.RichEdit.ContextMenuCommandId.Copy);
        e.contextMenu.removeItem(DevExpress.RichEdit.ContextMenuCommandId.Paste);
        e.contextMenu.removeItem(DevExpress.RichEdit.ContextMenuCommandId.Cut);
        e.contextMenu.getItem(customizedOnEventItemId).visible = true;
        e.contextMenu.items[0].beginGroup = true;
        e.contextMenu.insertItem(new DevExpress.RichEdit.ContextMenuItem('CutCopy', {
            icon: 'close', text: 'Copy Paste Disabled', disabled: true
        }), 1);
    }
};
function onCustomCommandExecuted(s, e) {
    switch (e.commandName) {
        case googleSearchId:
            var selectedText = s.selection.activeSubDocument.getText(s.selection.intervals[0]);
            window.open("https://www.google.com/search?q=" + selectedText, "_blank");
            break;
    }
}

Run Demo: Context Menu Customization