cef右键保存图片

    // CefContextMenuHandler methods
    void BrowserHandler::OnBeforeContextMenu(CefRefPtr browser,
            CefRefPtr frame,
            CefRefPtr params,
            CefRefPtr model) {
        REQUIRE_UI_THREAD();
        
        // CM_TYPEFLAG_MEDIA 包含图片、视频、文件等等
        // 可以再进行细化判断：params->GetMediaType() & CM_MEDIATYPE_IMAGE != 0
        if ((params->GetTypeFlags() & CM_TYPEFLAG_MEDIA) != 0 && (params->GetMediaType() & CM_MEDIATYPE_IMAGE != 0)) {
            if (model->GetCount() > 0) {
                // 禁止右键菜单
                model->Clear();
            }
        
            model->InsertItemAt(0, CLIENT_ID_COPY_IMAGE, L"复制图片");
            model->InsertItemAt(1, CLIENT_ID_SAVE_IMAGE_AS, L"图片另存为...");
            model->InsertSeparatorAt(2);
            model->AddItem(MENU_ID_PRINT, L"打印");
        }
    }

// 处理点击事件
bool BrowserHandler::OnContextMenuCommand(CefRefPtr browser, CefRefPtr frame, CefRefPtr params, int command_id, EventFlags event_flags) {
        // 复制图片到剪切板
        if (command_id == CLIENT_ID_COPY_IMAGE) {
            frame->Copy();

        } else if (command_id == CLIENT_ID_SAVE_IMAGE_AS) {
            // 存储图片
            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;
    }

转载于：libcef3——自定义右键菜单，复制图片和图片另存为_Go和分布式IM的博客-CSDN博客