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/*
* Copyright 2012, Serge V. Izmaylov
* Released under GPL Version 2 license.
*/
(function ($) {
var options = {
series: {
extents: {
show: false,
lineWidth: 1,
barHeight: 17,
color: "rgba(192, 192, 192, 1.0)",
showConnections: true,
connectionColor: "rgba(0, 192, 128, 0.8)",
fill: true,
fillColor: "rgba(64, 192, 255, 0.5)",
showLabels: true,
rowHeight: 20,
rows: 7,
barVAlign: "top",
labelHAlign: "left"
}
}
};
function processRawData(plot, series, data, datapoints) {
if (!series.extents || !series.extents.show)
return;
// Fool Flot with fake datapoints
datapoints.format = [ // Fake format
{ x: true, number: true, required: true },
{ y: true, number: true, required: true },
];
datapoints.points = []; // Empty data
datapoints.pointsize = 2; // Fake size
// Check if we have extents data
if (series.extentdata == null)
return;
// Process our real data
var row = 0;
for (i = 0; i < series.extentdata.length; i++) {
// Skip bad extents
if ((series.extentdata[i].start == null) || (series.extentdata[i].end == null))
continue;
if (series.extentdata[i].end < series.extentdata[i].start) {
var t = series.extentdata[i].end;
series.extentdata[i].end = series.extentdata[i].start;
series.extentdata[i].start = t;
}
if ((series.extentdata[i].labelHAlign != "left") && (series.extentdata[i].labelHAlign != "right"))
series.extentdata[i].labelHAlign = series.extents.labelHAlign;
if (series.extentdata[i].row == null) {
series.extentdata[i].row = row;
row = (row+1) % series.extents.rows;
} else {
row = (series.extentdata[i].row+1) % series.extents.rows;
}
if (series.extentdata[i].color == null)
series.extentdata[i].color = series.extents.color;
if (series.extentdata[i].fillColor == null)
series.extentdata[i].fillColor = series.extents.fillColor;
}
};
function drawSingleExtent(ctx, width, height, xfrom, xto, series, extent) {
if (xfrom < 0) xfrom = 0;
if (xto > width) xto = width;
var bw = xto-xfrom;
var yfrom;
if (series.extents.barVAlign == "top")
yfrom = 4 + series.extents.rowHeight*extent.row;
else
yfrom = height - 4 - series.extents.rowHeight*(extent.row) - series.extents.barHeight;
if (series.extents.fill) {
ctx.fillStyle = extent.fillColor;
ctx.fillRect(xfrom, yfrom, bw, series.extents.barHeight);
}
ctx.strokeStyle = extent.color;
ctx.strokeRect(xfrom, yfrom, bw, series.extents.barHeight);
}
function drawSingleConnection(ctx, width, height, xfrom, xto, rfrom, rto, series) {
if (xfrom < 0) xfrom = 0;
if (xto > width) xto = width;
var yfrom, yto;
if (series.extents.barVAlign == "top") {
yfrom = 4 + Math.round(series.extents.rowHeight*rfrom) + Math.round(series.extents.barHeight*0.5);
yto = 4 + Math.round(series.extents.rowHeight*rto) + Math.round(series.extents.barHeight*0.5);
} else {
yfrom = height - 4 - Math.round(series.extents.rowHeight*rfrom) - Math.round(series.extents.barHeight*0.5);
yto = height - 4 - Math.round(series.extents.rowHeight*rto) - Math.round(series.extents.barHeight*0.5);
}
ctx.beginPath();
ctx.moveTo(xfrom, yfrom);
ctx.lineTo(xfrom+10, yfrom);
ctx.lineTo(xto-10, yto);
ctx.lineTo(xto, yto);
ctx.lineTo(xto-6, yto-3);
ctx.lineTo(xto-6, yto+3);
ctx.lineTo(xto, yto);
ctx.stroke();
}
function addExtentLabel(placeholder, plotOffset, width, xfrom, xto, series, extent) {
var styles = [];
if (series.extents.barVAlign == "top")
styles.push("top:"+Math.round((plotOffset.top+series.extents.rowHeight*extent.row+4))+"px");
else
styles.push("bottom:"+Math.round((plotOffset.bottom+series.extents.rowHeight*extent.row+4))+"px");
if (extent.labelHAlign == "left")
styles.push("left:"+Math.round((plotOffset.left+xfrom+3))+"px");
else
styles.push("right:"+Math.round((plotOffset.right+(width-xto)+3))+"px");
styles.push("");
placeholder.append('<div '+((extent.id !=null)?('id="'+extent.id+'" '):'')+'class="extentLabel" style="font-size:smaller;position:absolute;'+(styles.join(';'))+'">'+extent.label+'</div>');
}
function drawSeries(plot, ctx, series) {
if (!series.extents || !series.extents.show || !series.extentdata)
return;
var placeholder = plot.getPlaceholder();
placeholder.find(".extentLabel").remove();
ctx.save();
var plotOffset = plot.getPlotOffset();
var axes = plot.getAxes();
var yf = axes.yaxis.p2c(axes.yaxis.min);
var yt = axes.yaxis.p2c(axes.yaxis.max);
var ytop = (yf>yt)?yt:yf;
var ybot = (yf>yt)?yf:yt;
var width = plot.width();
var height = plot.height();
ctx.translate(plotOffset.left, plotOffset.top);
ctx.lineJoin = "round";
for (var i = 0; i < series.extentdata.length; i++) {
var xfrom, xto;
if ((series.extentdata[i].start == null) || (series.extentdata[i].end == null))
continue;
if ((series.extentdata[i].start < axes.xaxis.max) && (series.extentdata[i].end > axes.xaxis.min)) {
xfrom = axes.xaxis.p2c((series.extentdata[i].start<axes.xaxis.min)?axes.xaxis.min:series.extentdata[i].start);
xto = axes.xaxis.p2c((series.extentdata[i].end>axes.xaxis.max)?axes.xaxis.max:series.extentdata[i].end);
drawSingleExtent(ctx, width, height, xfrom, xto, series, series.extentdata[i]);
if (series.extents.showConnections && (series.extentdata[i].start > axes.xaxis.min) && (series.extentdata[i].start < axes.xaxis.max))
if ((series.extentdata[i].depends != null) && (series.extentdata[i].depends.length != null) && (series.extentdata[i].depends.length > 0))
for (var j=0; j<series.extentdata[i].depends.length; j++) {
var k = series.extentdata[i].depends[j];
if ((k < 0) || (k >= series.extentdata.length))
continue;
if ((series.extentdata[k].start == null) || (series.extentdata[k].end == null))
continue;
var cxto = xfrom;
var cxfrom = series.extentdata[k].end;
if (cxfrom < axes.xaxis.min) cxfrom = axes.xaxis.min;
if (cxfrom > axes.xaxis.max) cxfrom = axes.xaxis.max;
cxfrom = axes.xaxis.p2c(cxfrom);
ctx.strokeStyle = series.extents.connectionColor;
drawSingleConnection(ctx, width, height, cxfrom, cxto, series.extentdata[k].row, series.extentdata[i].row, series);
}
if (series.extents.showLabels && (series.extentdata[i].label != null))
addExtentLabel(placeholder, plotOffset, width, xfrom, xto, series, series.extentdata[i]);
}
}
ctx.restore();
};
function init(plot) {
plot.hooks.processRawData.push(processRawData);
plot.hooks.drawSeries.push(drawSeries);
};
$.plot.plugins.push({
init: init,
name: "extents",
options: options,
version: "0.3"
});
})(jQuery);
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