VC实现波形不闪烁动态绘图
实现的方法：先在内存绘图，然后再拷贝到屏幕-VC does not flicker waveform realize realize dynamic mapping approach: first drawing in memory and then copied to the screen
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001828s ]
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:0.087643s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.012004s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001814s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001285s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003755s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.010926s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.007550s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014414s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001128s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 177183 [ RunTime:0.019813s ]
