When the user clicks and drags to mark a selection on the x axis, the default zoom operation is cancelled, and instead an Ajax request is sent to the server for new, higher resolution data within the selected area.
Below is the contents of the file drilldown-data.php. In most real world
cases the data would be fetched from a database with a query to select all
values between min
and max
.
<?php $data = array( 1136073600 => 0.8446, 1136160000 => 0.8445, 1136246400 => 0.8444, 1136332800 => 0.8451, 1136419200 => 0.8418, 1136505600 => 0.8264, 1136592000 => 0.8258, 1136678400 => 0.8232, 1136764800 => 0.8233, 1136851200 => 0.8258, 1136937600 => 0.8283, 1137024000 => 0.8278, 1137110400 => 0.8256, 1137196800 => 0.8292, 1137283200 => 0.8239, 1137369600 => 0.8239, 1137456000 => 0.8245, 1137542400 => 0.8265, 1137628800 => 0.8261, 1137715200 => 0.8269, 1137801600 => 0.8273, 1137888000 => 0.8244, 1137974400 => 0.8244, 1138060800 => 0.8172, 1138147200 => 0.8139, 1138233600 => 0.8146, 1138320000 => 0.8164, 1138406400 => 0.82, 1138492800 => 0.8269, 1138579200 => 0.8269, 1138665600 => 0.8269, 1138752000 => 0.8258, 1138838400 => 0.8247, 1138924800 => 0.8286, 1139011200 => 0.8289, 1139097600 => 0.8316, 1139184000 => 0.832, 1139270400 => 0.8333, 1139356800 => 0.8352, 1139443200 => 0.8357, 1139529600 => 0.8355, 1139616000 => 0.8354, 1139702400 => 0.8403, 1139788800 => 0.8403, 1139875200 => 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=> 0.6827, 1195257600 => 0.6837, 1195344000 => 0.6823, 1195430400 => 0.6822, 1195516800 => 0.6822, 1195603200 => 0.6792, 1195689600 => 0.6746, 1195776000 => 0.6735, 1195862400 => 0.6731, 1195948800 => 0.6742, 1196035200 => 0.6744, 1196121600 => 0.6739, 1196208000 => 0.6731, 1196294400 => 0.6761, 1196380800 => 0.6761, 1196467200 => 0.6785, 1196553600 => 0.6818, 1196640000 => 0.6836, 1196726400 => 0.6823, 1196812800 => 0.6805, 1196899200 => 0.6793, 1196985600 => 0.6849, 1197072000 => 0.6833, 1197158400 => 0.6825, 1197244800 => 0.6825, 1197331200 => 0.6816, 1197417600 => 0.6799, 1197504000 => 0.6813, 1197590400 => 0.6809, 1197676800 => 0.6868, 1197763200 => 0.6933, 1197849600 => 0.6933, 1197936000 => 0.6945, 1198022400 => 0.6944, 1198108800 => 0.6946, 1198195200 => 0.6964, 1198281600 => 0.6965, 1198368000 => 0.6956, 1198454400 => 0.6956, 1198540800 => 0.695, 1198627200 => 0.6948, 1198713600 => 0.6928, 1198800000 => 0.6887, 1198886400 => 0.6824, 1198972800 => 0.6794, 1199059200 => 0.6794, 1199145600 => 0.6803, 1199232000 => 0.6855, 1199318400 => 0.6824, 1199404800 => 0.6791, 1199491200 => 0.6783, 1199577600 => 0.6785, 1199664000 => 0.6785, 1199750400 => 0.6797, 1199836800 => 0.68, 1199923200 => 0.6803, 1200009600 => 0.6805, 1200096000 => 0.676, 1200182400 => 0.677, 1200268800 => 0.677, 1200355200 => 0.6736, 1200441600 => 0.6726, 1200528000 => 0.6764, 1200614400 => 0.6821, 1200700800 => 0.6831, 1200787200 => 0.6842, 1200873600 => 0.6842, 1200960000 => 0.6887, 1201046400 => 0.6903, 1201132800 => 0.6848, 1201219200 => 0.6824, 1201305600 => 0.6788, 1201392000 => 0.6814, 1201478400 => 0.6814, 1201564800 => 0.6797, 1201651200 => 0.6769, 1201737600 => 0.6765, 1201824000 => 0.6733, 1201910400 => 0.6729, 1201996800 => 0.6758, 1202083200 => 0.6758, 1202169600 => 0.675, 1202256000 => 0.678, 1202342400 => 0.6833, 1202428800 => 0.6856, 1202515200 => 0.6903, 1202601600 => 0.6896, 1202688000 => 0.6896, 1202774400 => 0.6882, 1202860800 => 0.6879, 1202947200 => 0.6862, 1203033600 => 0.6852, 1203120000 => 0.6823, 1203206400 => 0.6813, 1203292800 => 0.6813, 1203379200 => 0.6822, 1203465600 => 0.6802, 1203552000 => 0.6802, 1203638400 => 0.6784, 1203724800 => 0.6748, 1203811200 => 0.6747, 1203897600 => 0.6747, 1203984000 => 0.6748, 1204070400 => 0.6733, 1204156800 => 0.665, 1204243200 => 0.6611, 1204329600 => 0.6583, 1204416000 => 0.659, 1204502400 => 0.659, 1204588800 => 0.6581, 1204675200 => 0.6578, 1204761600 => 0.6574, 1204848000 => 0.6532, 1204934400 => 0.6502, 1205020800 => 0.6514, 1205107200 => 0.6514, 1205193600 => 0.6507, 1205280000 => 0.651, 1205366400 => 0.6489, 1205452800 => 0.6424, 1205539200 => 0.6406, 1205625600 => 0.6382, 1205712000 => 0.6382, 1205798400 => 0.6341, 1205884800 => 0.6344, 1205971200 => 0.6378, 1206057600 => 0.6439, 1206144000 => 0.6478, 1206230400 => 0.6481, 1206316800 => 0.6481, 1206403200 => 0.6494, 1206489600 => 0.6438, 1206576000 => 0.6377, 1206662400 => 0.6329, 1206748800 => 0.6336, 1206835200 => 0.6333, 1206921600 => 0.6333, 1207008000 => 0.633, 1207094400 => 0.6371, 1207180800 => 0.6403, 1207267200 => 0.6396, 1207353600 => 0.6364, 1207440000 => 0.6356, 1207526400 => 0.6356, 1207612800 => 0.6368, 1207699200 => 0.6357, 1207785600 => 0.6354, 1207872000 => 0.632, 1207958400 => 0.6332, 1208044800 => 0.6328, 1208131200 => 0.6331, 1208217600 => 0.6342, 1208304000 => 0.6321, 1208390400 => 0.6302, 1208476800 => 0.6278, 1208563200 => 0.6308, 1208649600 => 0.6324, 1208736000 => 0.6324, 1208822400 => 0.6307, 1208908800 => 0.6277, 1208995200 => 0.6269, 1209081600 => 0.6335, 1209168000 => 0.6392, 1209254400 => 0.64, 1209340800 => 0.6401, 1209427200 => 0.6396, 1209513600 => 0.6407, 1209600000 => 0.6423, 1209686400 => 0.6429, 1209772800 => 0.6472, 1209859200 => 0.6485, 1209945600 => 0.6486, 1210032000 => 0.6467, 1210118400 => 0.6444, 1210204800 => 0.6467, 1210291200 => 0.6509, 1210377600 => 0.6478, 1210464000 => 0.6461, 1210550400 => 0.6461, 1210636800 => 0.6468, 1210723200 => 0.6449, 1210809600 => 0.647, 1210896000 => 0.6461, 1210982400 => 0.6452, 1211068800 => 0.6422, 1211155200 => 0.6422, 1211241600 => 0.6425, 1211328000 => 0.6414, 1211414400 => 0.6366, 1211500800 => 0.6346, 1211587200 => 0.635, 1211673600 => 0.6346, 1211760000 => 0.6346, 1211846400 => 0.6343, 1211932800 => 0.6346, 1212019200 => 0.6379, 1212105600 => 0.6416, 1212192000 => 0.6442, 1212278400 => 0.6431, 1212364800 => 0.6431, 1212451200 => 0.6435, 1212537600 => 0.644, 1212624000 => 0.6473, 1212710400 => 0.6469, 1212796800 => 0.6386, 1212883200 => 0.6356, 1212969600 => 0.634, 1213056000 => 0.6346, 1213142400 => 0.643, 1213228800 => 0.6452, 1213315200 => 0.6467, 1213401600 => 0.6506, 1213488000 => 0.6504, 1213574400 => 0.6503, 1213660800 => 0.6481, 1213747200 => 0.6451, 1213833600 => 0.645, 1213920000 => 0.6441, 1214006400 => 0.6414, 1214092800 => 0.6409, 1214179200 => 0.6409, 1214265600 => 0.6428, 1214352000 => 0.6431, 1214438400 => 0.6418, 1214524800 => 0.6371, 1214611200 => 0.6349, 1214697600 => 0.6333, 1214784000 => 0.6334, 1214870400 => 0.6338, 1214956800 => 0.6342, 1215043200 => 0.632, 1215129600 => 0.6318, 1215216000 => 0.637, 1215302400 => 0.6368, 1215388800 => 0.6368, 1215475200 => 0.6383, 1215561600 => 0.6371, 1215648000 => 0.6371, 1215734400 => 0.6355, 1215820800 => 0.632, 1215907200 => 0.6277, 1215993600 => 0.6276, 1216080000 => 0.6291, 1216166400 => 0.6274, 1216252800 => 0.6293, 1216339200 => 0.6311, 1216425600 => 0.631, 1216512000 => 0.6312, 1216598400 => 0.6312, 1216684800 => 0.6304, 1216771200 => 0.6294, 1216857600 => 0.6348, 1216944000 => 0.6378, 1217030400 => 0.6368, 1217116800 => 0.6368, 1217203200 => 0.6368, 1217289600 => 0.636, 1217376000 => 0.637, 1217462400 => 0.6418, 1217548800 => 0.6411, 1217635200 => 0.6435, 1217721600 => 0.6427, 1217808000 => 0.6427, 1217894400 => 0.6419, 1217980800 => 0.6446, 1218067200 => 0.6468, 1218153600 => 0.6487, 1218240000 => 0.6594, 1218326400 => 0.6666, 1218412800 => 0.6666, 1218499200 => 0.6678, 1218585600 => 0.6712, 1218672000 => 0.6705, 1218758400 => 0.6718, 1218844800 => 0.6784, 1218931200 => 0.6811, 1219017600 => 0.6811, 1219104000 => 0.6794, 1219190400 => 0.6804, 1219276800 => 0.6781, 1219363200 => 0.6756, 1219449600 => 0.6735, 1219536000 => 0.6763, 1219622400 => 0.6762, 1219708800 => 0.6777, 1219795200 => 0.6815, 1219881600 => 0.6802, 1219968000 => 0.678, 1220054400 => 0.6796, 1220140800 => 0.6817, 1220227200 => 0.6817, 1220313600 => 0.6832, 1220400000 => 0.6877, 1220486400 => 0.6912, 1220572800 => 0.6914, 1220659200 => 0.7009, 1220745600 => 0.7012, 1220832000 => 0.701, 1220918400 => 0.7005, 1221004800 => 0.7076, 1221091200 => 0.7087, 1221177600 => 0.717, 1221264000 => 0.7105, 1221350400 => 0.7031, 1221436800 => 0.7029, 1221523200 => 0.7006, 1221609600 => 0.7035, 1221696000 => 0.7045, 1221782400 => 0.6956, 1221868800 => 0.6988, 1221955200 => 0.6915, 1222041600 => 0.6914, 1222128000 => 0.6859, 1222214400 => 0.6778, 1222300800 => 0.6815, 1222387200 => 0.6815, 1222473600 => 0.6843, 1222560000 => 0.6846, 1222646400 => 0.6846, 1222732800 => 0.6923, 1222819200 => 0.6997, 1222905600 => 0.7098, 1222992000 => 0.7188, 1223078400 => 0.7232, 1223164800 => 0.7262, 1223251200 => 0.7266, 1223337600 => 0.7359, 1223424000 => 0.7368, 1223510400 => 0.7337, 1223596800 => 0.7317, 1223683200 => 0.7387, 1223769600 => 0.7467, 1223856000 => 0.7461, 1223942400 => 0.7366, 1224028800 => 0.7319, 1224115200 => 0.7361, 1224201600 => 0.7437, 1224288000 => 0.7432, 1224374400 => 0.7461, 1224460800 => 0.7461, 1224547200 => 0.7454, 1224633600 => 0.7549, 1224720000 => 0.7742, 1224806400 => 0.7801, 1224892800 => 0.7903, 1224979200 => 0.7876, 1225065600 => 0.7928, 1225152000 => 0.7991, 1225238400 => 0.8007, 1225324800 => 0.7823, 1225411200 => 0.7661, 1225497600 => 0.785, 1225584000 => 0.7863, 1225670400 => 0.7862, 1225756800 => 0.7821, 1225843200 => 0.7858, 1225929600 => 0.7731, 1226016000 => 0.7779, 1226102400 => 0.7844, 1226188800 => 0.7866, 1226275200 => 0.7864, 1226361600 => 0.7788, 1226448000 => 0.7875, 1226534400 => 0.7971, 1226620800 => 0.8004, 1226707200 => 0.7857, 1226793600 => 0.7932, 1226880000 => 0.7938, 1226966400 => 0.7927, 1227052800 => 0.7918, 1227139200 => 0.7919, 1227225600 => 0.7989, 1227312000 => 0.7988, 1227398400 => 0.7949, 1227484800 => 0.7948, 1227571200 => 0.7882, 1227657600 => 0.7745, 1227744000 => 0.771, 1227830400 => 0.775, 1227916800 => 0.7791, 1228003200 => 0.7882, 1228089600 => 0.7882, 1228176000 => 0.7899, 1228262400 => 0.7905, 1228348800 => 0.7889, 1228435200 => 0.7879, 1228521600 => 0.7855, 1228608000 => 0.7866, 1228694400 => 0.7865, 1228780800 => 0.7795, 1228867200 => 0.7758, 1228953600 => 0.7717, 1229040000 => 0.761, 1229126400 => 0.7497, 1229212800 => 0.7471, 1229299200 => 0.7473, 1229385600 => 0.7407, 1229472000 => 0.7288, 1229558400 => 0.7074, 1229644800 => 0.6927, 1229731200 => 0.7083, 1229817600 => 0.7191, 1229904000 => 0.719, 1229990400 => 0.7153, 1230076800 => 0.7156, 1230163200 => 0.7158, 1230249600 => 0.714, 1230336000 => 0.7119, 1230422400 => 0.7129, 1230508800 => 0.7129, 1230595200 => 0.7049, 1230681600 => 0.7095 ); // convert to Unix timestamp $min = round($_GET['min']/1000); $max = round($_GET['max']/1000); // build a twodimensional array of data items between min and max $newData = array(); foreach ($data as $key => $value) { if ($key > $min && $key < $max) { $newData[] = array($key * 1000, $value); } } // json-encode it and send it to the client echo json_encode($newData); ?>