// CefContextMenuHandler methods
    void BrowserHandler::OnBeforeContextMenu(CefRefPtr<CefBrowser> browser,
            CefRefPtr<CefFrame> frame,
            CefRefPtr<CefContextMenuParams> params,
            CefRefPtr<CefMenuModel> model) {
        REQUIRE_UI_THREAD();
        
        
 
// CM_TYPEFLAG_MEDIA 包含圖片、視訊、檔案等等
        // 可以再進行細化判斷：params->GetMediaType() & CM_MEDIATYPE_IMAGE != 0
        if ((params->GetTypeFlags() & CM_TYPEFLAG_MEDIA) != 0 && (params->GetMediaType() & CM_MEDIATYPE_IMAGE != 0)) {
            if (model->GetCount() > 0) {
                
 
// 禁止右鍵選單
                model->Clear();
            }
        
            model->InsertItemAt(0, CLIENT_ID_COPY_IMAGE, L"複製圖片");
            model->InsertItemAt(1, CLIENT_ID_SAVE_IMAGE_AS, L"圖片另存為...");
            model->InsertSeparatorAt(2);
            model->AddItem(MENU_ID_PRINT, L"
 
列印");
        }
    }

// 處理點選事件
bool BrowserHandler::OnContextMenuCommand(CefRefPtr<CefBrowser> browser, CefRefPtr<CefFrame> frame, CefRefPtr<CefContextMenuParams> params, int command_id, EventFlags event_flags) {
        // 複製圖片到剪下板
        if (command_id == CLIENT_ID_COPY_IMAGE) {
            frame->Copy();

        } else if (command_id == CLIENT_ID_SAVE_IMAGE_AS) {
            // 儲存圖片
            frame->GetBrowser().get()->GetHost().get()->StartDownload(frame->GetURL());
        }

        if (handle_delegate_)
            return handle_delegate_->OnContextMenuCommand(browser, frame, params, command_id, event_flags);

        else
            return false;
    }

轉載於：libcef3——自定義右鍵選單，複製圖片和圖片另存為_Go和分散式IM的部落格-CSDN部落格