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author | Chris Schlaeger <chris@linux.com> | 2014-08-12 21:56:44 +0200 |
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committer | Chris Schlaeger <chris@linux.com> | 2014-08-12 21:56:44 +0200 |
commit | ea346a785dc1b3f7c156f6fc33da634e1f1a627b (patch) | |
tree | af67530553d20b6e82ad60fd79593e9c4abf5565 /misc/flot/jquery.flot.fillbetween.js | |
parent | 59741cd535c47f25971bf8c32b25da25ceadc6d5 (diff) | |
download | postrunner-ea346a785dc1b3f7c156f6fc33da634e1f1a627b.zip |
Adding jquery, flot and openlayers to be included with the GEM.v0.0.4
Diffstat (limited to 'misc/flot/jquery.flot.fillbetween.js')
-rw-r--r-- | misc/flot/jquery.flot.fillbetween.js | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/misc/flot/jquery.flot.fillbetween.js b/misc/flot/jquery.flot.fillbetween.js new file mode 100644 index 0000000..18b15d2 --- /dev/null +++ b/misc/flot/jquery.flot.fillbetween.js @@ -0,0 +1,226 @@ +/* Flot plugin for computing bottoms for filled line and bar charts. + +Copyright (c) 2007-2014 IOLA and Ole Laursen. +Licensed under the MIT license. + +The case: you've got two series that you want to fill the area between. In Flot +terms, you need to use one as the fill bottom of the other. You can specify the +bottom of each data point as the third coordinate manually, or you can use this +plugin to compute it for you. + +In order to name the other series, you need to give it an id, like this: + + var dataset = [ + { data: [ ... ], id: "foo" } , // use default bottom + { data: [ ... ], fillBetween: "foo" }, // use first dataset as bottom + ]; + + $.plot($("#placeholder"), dataset, { lines: { show: true, fill: true }}); + +As a convenience, if the id given is a number that doesn't appear as an id in +the series, it is interpreted as the index in the array instead (so fillBetween: +0 can also mean the first series). + +Internally, the plugin modifies the datapoints in each series. For line series, +extra data points might be inserted through interpolation. Note that at points +where the bottom line is not defined (due to a null point or start/end of line), +the current line will show a gap too. The algorithm comes from the +jquery.flot.stack.js plugin, possibly some code could be shared. + +*/ + +(function ( $ ) { + + var options = { + series: { + fillBetween: null // or number + } + }; + + function init( plot ) { + + function findBottomSeries( s, allseries ) { + + var i; + + for ( i = 0; i < allseries.length; ++i ) { + if ( allseries[ i ].id === s.fillBetween ) { + return allseries[ i ]; + } + } + + if ( typeof s.fillBetween === "number" ) { + if ( s.fillBetween < 0 || s.fillBetween >= allseries.length ) { + return null; + } + return allseries[ s.fillBetween ]; + } + + return null; + } + + function computeFillBottoms( plot, s, datapoints ) { + + if ( s.fillBetween == null ) { + return; + } + + var other = findBottomSeries( s, plot.getData() ); + + if ( !other ) { + return; + } + + var ps = datapoints.pointsize, + points = datapoints.points, + otherps = other.datapoints.pointsize, + otherpoints = other.datapoints.points, + newpoints = [], + px, py, intery, qx, qy, bottom, + withlines = s.lines.show, + withbottom = ps > 2 && datapoints.format[2].y, + withsteps = withlines && s.lines.steps, + fromgap = true, + i = 0, + j = 0, + l, m; + + while ( true ) { + + if ( i >= points.length ) { + break; + } + + l = newpoints.length; + + if ( points[ i ] == null ) { + + // copy gaps + + for ( m = 0; m < ps; ++m ) { + newpoints.push( points[ i + m ] ); + } + + i += ps; + + } else if ( j >= otherpoints.length ) { + + // for lines, we can't use the rest of the points + + if ( !withlines ) { + for ( m = 0; m < ps; ++m ) { + newpoints.push( points[ i + m ] ); + } + } + + i += ps; + + } else if ( otherpoints[ j ] == null ) { + + // oops, got a gap + + for ( m = 0; m < ps; ++m ) { + newpoints.push( null ); + } + + fromgap = true; + j += otherps; + + } else { + + // cases where we actually got two points + + px = points[ i ]; + py = points[ i + 1 ]; + qx = otherpoints[ j ]; + qy = otherpoints[ j + 1 ]; + bottom = 0; + + if ( px === qx ) { + + for ( m = 0; m < ps; ++m ) { + newpoints.push( points[ i + m ] ); + } + + //newpoints[ l + 1 ] += qy; + bottom = qy; + + i += ps; + j += otherps; + + } else if ( px > qx ) { + + // we got past point below, might need to + // insert interpolated extra point + + if ( withlines && i > 0 && points[ i - ps ] != null ) { + intery = py + ( points[ i - ps + 1 ] - py ) * ( qx - px ) / ( points[ i - ps ] - px ); + newpoints.push( qx ); + newpoints.push( intery ); + for ( m = 2; m < ps; ++m ) { + newpoints.push( points[ i + m ] ); + } + bottom = qy; + } + + j += otherps; + + } else { // px < qx + + // if we come from a gap, we just skip this point + + if ( fromgap && withlines ) { + i += ps; + continue; + } + + for ( m = 0; m < ps; ++m ) { + newpoints.push( points[ i + m ] ); + } + + // we might be able to interpolate a point below, + // this can give us a better y + + if ( withlines && j > 0 && otherpoints[ j - otherps ] != null ) { + bottom = qy + ( otherpoints[ j - otherps + 1 ] - qy ) * ( px - qx ) / ( otherpoints[ j - otherps ] - qx ); + } + + //newpoints[l + 1] += bottom; + + i += ps; + } + + fromgap = false; + + if ( l !== newpoints.length && withbottom ) { + newpoints[ l + 2 ] = bottom; + } + } + + // maintain the line steps invariant + + if ( withsteps && l !== newpoints.length && l > 0 && + newpoints[ l ] !== null && + newpoints[ l ] !== newpoints[ l - ps ] && + newpoints[ l + 1 ] !== newpoints[ l - ps + 1 ] ) { + for (m = 0; m < ps; ++m) { + newpoints[ l + ps + m ] = newpoints[ l + m ]; + } + newpoints[ l + 1 ] = newpoints[ l - ps + 1 ]; + } + } + + datapoints.points = newpoints; + } + + plot.hooks.processDatapoints.push( computeFillBottoms ); + } + + $.plot.plugins.push({ + init: init, + options: options, + name: "fillbetween", + version: "1.0" + }); + +})(jQuery); |