te')); return $arr; } /* 遍历用户所有主题 * @param $uid 用户ID * @param int $page 页数 * @param int $pagesize 每页记录条数 * @param bool $desc 排序方式 TRUE降序 FALSE升序 * @param string $key 返回的数组用那一列的值作为 key * @param array $col 查询哪些列 */ function thread_tid_find_by_uid($uid, $page = 1, $pagesize = 1000, $desc = TRUE, $key = 'tid', $col = array()) { if (empty($uid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('uid' => $uid), array('tid' => $orderby), $page, $pagesize, $key, $col); return $arr; } // 遍历栏目下tid 支持数组 $fid = array(1,2,3) function thread_tid_find_by_fid($fid, $page = 1, $pagesize = 1000, $desc = TRUE) { if (empty($fid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('fid' => $fid), array('tid' => $orderby), $page, $pagesize, 'tid', array('tid', 'verify_date')); return $arr; } function thread_tid_delete($tid) { if (empty($tid)) return FALSE; $r = thread_tid__delete(array('tid' => $tid)); return $r; } function thread_tid_count() { $n = thread_tid__count(); return $n; } // 统计用户主题数 大数量下严谨使用非主键统计 function thread_uid_count($uid) { $n = thread_tid__count(array('uid' => $uid)); return $n; } // 统计栏目主题数 大数量下严谨使用非主键统计 function thread_fid_count($fid) { $n = thread_tid__count(array('fid' => $fid)); return $n; } ?>activex - barcode scanner in JavaScript? Or pluginextension - Stack Overflow

科技改变生活-雨落星辰 - 所有的伟大,都源于一个勇敢的开始

    最新消息：雨落星辰是一个专注网站SEO优化、网站SEO诊断、搜索引擎研究、网络营销推广、网站策划运营及站长类的自媒体原创博客
    你的位置： 首页>programmer>activex - barcode scanner in JavaScript? Or pluginextension - Stack Overflow

    activex - barcode scanner in JavaScript? Or pluginextension - Stack Overflow

    programmeradmin4浏览0评论

    I'm looking at writing a USB barcode scanner interface to a web application (offline app). By this I mean that the scanner will be on the client machine not server. So I was wondering what the best design would be.

    I know I could write an ActiveX object or native plugin into some browser but this is not ideal, does anyone know if chrome extensions (in javascript) or firefox jetpack would support this kind of functionality.

    Any ideas? I would appreciate any leads to follow.

    Thanks All

    Guido

    I'm looking at writing a USB barcode scanner interface to a web application (offline app). By this I mean that the scanner will be on the client machine not server. So I was wondering what the best design would be.

    I know I could write an ActiveX object or native plugin into some browser but this is not ideal, does anyone know if chrome extensions (in javascript) or firefox jetpack would support this kind of functionality.

    Any ideas? I would appreciate any leads to follow.

    Thanks All

    Guido

    • javascript
    • activex
    • firefox-addon
    • google-chrome-extension
    • barcode-scanner
    Share Improve this question asked Jul 16, 2010 at 5:18 gatapiagatapia 3,6625 gold badges42 silver badges51 bronze badges
    Add a ment  | 

    1 Answer 1

    Reset to default 16

    USB barcode scanners implement a HID device (the sane ones anyway), which means they act like an ordinary keyboard. The default mode of operation is to "type" out the barcode, followed by an "Enter". Some barcode scanners are highly configurable, often through scanning configuration barcodes from a chart, allowing you to change this behavior.

    The only gotcha is special characters - this depends on what you are scanning.

    The good news is that there is no need to write any special controls or extensions or plugins. All you need to do is auto focus on the input control and accept the form based on the enter key being pressed.

    与本文相关的文章

    发布评论

    评论列表(0)

    1. 暂无评论