用slider(滑动)控件控制视图的放大和缩小
视口跟窗口的变换算法,坐标系之间转换-Use slider (sliding) control control view, as I zoom in and out with the window transform algorithm, coordinate system conversion between
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SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.091148s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000924s ]
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SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000883s ]
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SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.019530s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 291878 [ RunTime:0.023308s ]
