/**
* Copyright (c) 2009 Chris Leonello
* jqPlot is currently available for use in all personal or commercial projects
* under both the MIT and GPL version 2.0 licenses. This means that you can
* choose the license that best suits your project and use it accordingly.
*
* The author would appreciate an email letting him know of any substantial
* use of jqPlot. You can reach the author at: chris dot leonello at gmail
* dot com or see http://www.jqplot.com/info.php . This is, of course,
* not required.
*
* If you are feeling kind and generous, consider supporting the project by
* making a donation at: http://www.jqplot.com/donate.php .
*
* Thanks for using jqPlot!
*
*/
(function($) {
/**
* Class: $.jqplot.Cursor
* Plugin class representing the cursor as displayed on the plot.
*/
$.jqplot.Cursor = function(options) {
// Group: Properties
//
// prop: style
// CSS spec for cursor style
this.style = 'crosshair';
this.previousCursor = 'auto';
// prop: show
// wether to show the cursor or not.
this.show = $.jqplot.config.enablePlugins;
// prop: showTooltip
// show a cursor position tooltip near the cursor
this.showTooltip = true;
// prop: followMouse
// Tooltip follows the mouse, it is not at a fixed location.
// Tooltip will show on the grid at the location given by
// tooltipLocation, offset from the grid edge by tooltipOffset.
this.followMouse = false;
// prop: tooltipLocation
// Where to position tooltip. If followMouse is true, this is
// relative to the cursor, otherwise, it is relative to the grid.
// One of 'n', 'ne', 'e', 'se', 's', 'sw', 'w', 'nw'
this.tooltipLocation = 'se';
// prop: tooltipOffset
// Pixel offset of tooltip from the grid boudaries or cursor center.
this.tooltipOffset = 6;
// prop: showTooltipGridPosition
// show the grid pixel coordinates of the mouse.
this.showTooltipGridPosition = false;
// prop: showTooltipUnitPosition
// show the unit (data) coordinates of the mouse.
this.showTooltipUnitPosition = true;
// prop: showTooltipDataPosition
// Used with showVerticalLine to show intersecting data points in the tooltip.
this.showTooltipDataPosition = false;
// prop: tooltipFormatString
// sprintf format string for the tooltip.
// Uses Ash Searle's javascript sprintf implementation
// found here: http://hexmen.com/blog/2007/03/printf-sprintf/
// See http://perldoc.perl.org/functions/sprintf.html for reference
// Note, if showTooltipDataPosition is true, the default tooltipFormatString
// will be set to the cursorLegendFormatString, not the default given here.
this.tooltipFormatString = '%.4P, %.4P';
// prop: useAxesFormatters
// Use the x and y axes formatters to format the text in the tooltip.
this.useAxesFormatters = true;
// prop: tooltipAxisGroups
// Show position for the specified axes.
// This is an array like [['xaxis', 'yaxis'], ['xaxis', 'y2axis']]
// Default is to compute automatically for all visible axes.
this.tooltipAxisGroups = [];
// prop: zoom
// Enable plot zooming.
this.zoom = false;
// zoomProxy and zoomTarget properties are not directly set by user.
// They Will be set through call to zoomProxy method.
this.zoomProxy = false;
this.zoomTarget = false;
// prop: clickReset
// Will reset plot zoom if single click on plot without drag.
this.clickReset = false;
// prop: dblClickReset
// Will reset plot zoom if double click on plot without drag.
this.dblClickReset = true;
// prop: showVerticalLine
// draw a vertical line across the plot which follows the cursor.
// When the line is near a data point, a special legend and/or tooltip can
// be updated with the data values.
this.showVerticalLine = false;
// prop: showHorizontalLine
// draw a horizontal line across the plot which follows the cursor.
this.showHorizontalLine = false;
// prop: constrainZoomTo
// 'none', 'x' or 'y'
this.constrainZoomTo = 'none';
// // prop: autoscaleConstraint
// // when a constrained axis is specified, true will
// // auatoscale the adjacent axis.
// this.autoscaleConstraint = true;
this.shapeRenderer = new $.jqplot.ShapeRenderer();
this._zoom = {start:[], end:[], started: false, zooming:false, isZoomed:false, axes:{start:{}, end:{}}};
this._tooltipElem;
this.zoomCanvas;
this.cursorCanvas;
// prop: intersectionThreshold
// pixel distance from data point or marker to consider cursor lines intersecting with point.
// If data point markers are not shown, this should be >= 1 or will often miss point intersections.
this.intersectionThreshold = 2;
// prop: showCursorLegend
// Replace the plot legend with an enhanced legend displaying intersection information.
this.showCursorLegend = false;
// prop: cursorLegendFormatString
// Format string used in the cursor legend. If showTooltipDataPosition is true,
// this will also be the default format string used by tooltipFormatString.
this.cursorLegendFormatString = $.jqplot.Cursor.cursorLegendFormatString;
$.extend(true, this, options);
};
$.jqplot.Cursor.cursorLegendFormatString = '%s x:%s, y:%s';
// called with scope of plot
$.jqplot.Cursor.init = function (target, data, opts){
// add a cursor attribute to the plot
var options = opts || {};
this.plugins.cursor = new $.jqplot.Cursor(options.cursor);
var c = this.plugins.cursor;
if (c.show) {
$.jqplot.eventListenerHooks.push(['jqplotMouseEnter', handleMouseEnter]);
$.jqplot.eventListenerHooks.push(['jqplotMouseLeave', handleMouseLeave]);
$.jqplot.eventListenerHooks.push(['jqplotMouseMove', handleMouseMove]);
if (c.showCursorLegend) {
opts.legend = opts.legend || {};
opts.legend.renderer = $.jqplot.CursorLegendRenderer;
opts.legend.formatString = this.plugins.cursor.cursorLegendFormatString;
opts.legend.show = true;
}
if (c.zoom) {
$.jqplot.eventListenerHooks.push(['jqplotMouseDown', handleMouseDown]);
$.jqplot.eventListenerHooks.push(['jqplotMouseUp', handleMouseUp]);
if (c.clickReset) {
$.jqplot.eventListenerHooks.push(['jqplotClick', handleClick]);
}
if (c.dblClickReset) {
$.jqplot.eventListenerHooks.push(['jqplotDblClick', handleDblClick]);
}
}
this.resetZoom = function() {
var axes = this.axes;
if (!c.zoomProxy) {
for (var ax in axes) {
axes[ax].reset();
}
this.redraw();
}
else {
var ctx = this.plugins.cursor.zoomCanvas._ctx;
ctx.clearRect(0,0,ctx.canvas.width, ctx.canvas.height);
}
this.plugins.cursor._zoom.isZoomed = false;
this.target.trigger('jqplotResetZoom', [this, this.plugins.cursor]);
};
if (c.showTooltipDataPosition) {
c.showTooltipUnitPosition = false;
c.showTooltipGridPosition = false;
if (options.cursor.tooltipFormatString == undefined) {
c.tooltipFormatString = $.jqplot.Cursor.cursorLegendFormatString;
}
}
}
};
// called with context of plot
$.jqplot.Cursor.postDraw = function() {
var c = this.plugins.cursor;
// if (c.zoom) {
c.zoomCanvas = new $.jqplot.GenericCanvas();
this.eventCanvas._elem.before(c.zoomCanvas.createElement(this._gridPadding, 'jqplot-zoom-canvas', this._plotDimensions));
var zctx = c.zoomCanvas.setContext();
// }
c._tooltipElem = $('<div class="jqplot-cursor-tooltip" style="position:absolute;display:none"></div>');
c.zoomCanvas._elem.before(c._tooltipElem);
if (c.showVerticalLine || c.showHorizontalLine) {
c.cursorCanvas = new $.jqplot.GenericCanvas();
this.eventCanvas._elem.before(c.cursorCanvas.createElement(this._gridPadding, 'jqplot-cursor-canvas', this._plotDimensions));
var zctx = c.cursorCanvas.setContext();
}
// if we are showing the positions in unit coordinates, and no axes groups
// were specified, create a default set.
if (c.showTooltipUnitPosition){
if (c.tooltipAxisGroups.length === 0) {
var series = this.series;
var s;
var temp = [];
for (var i=0; i<series.length; i++) {
s = series[i];
var ax = s.xaxis+','+s.yaxis;
if ($.inArray(ax, temp) == -1) {
temp.push(ax);
}
}
for (var i=0; i<temp.length; i++) {
c.tooltipAxisGroups.push(temp[i].split(','));
}
}
}
};
// Group: methods
//
// method: $.jqplot.Cursor.zoomProxy
// links targetPlot to controllerPlot so that plot zooming of
// targetPlot will be controlled by zooming on the controllerPlot.
// controllerPlot will not actually zoom, but acts as an
// overview plot. Note, the zoom options must be set to true for
// zoomProxy to work.
$.jqplot.Cursor.zoomProxy = function(targetPlot, controllerPlot) {
var tc = targetPlot.plugins.cursor;
var cc = controllerPlot.plugins.cursor;
tc.zoomTarget = true;
tc.zoom = true;
tc.style = 'auto';
tc.dblClickReset = false;
cc.zoom = true;
cc.zoomProxy = true;
controllerPlot.target.bind('jqplotZoom', plotZoom);
controllerPlot.target.bind('jqplotResetZoom', plotReset);
function plotZoom(ev, gridpos, datapos, plot, cursor) {
tc.doZoom(gridpos, datapos, targetPlot, cursor);
}
function plotReset(ev, plot, cursor) {
targetPlot.resetZoom();
}
};
$.jqplot.Cursor.prototype.resetZoom = function(plot, cursor) {
var axes = plot.axes;
var cax = cursor._zoom.axes;
if (!plot.plugins.cursor.zoomProxy && cursor._zoom.isZoomed) {
for (var ax in axes) {
axes[ax]._ticks = [];
axes[ax].min = cax[ax].min;
axes[ax].max = cax[ax].max;
axes[ax].numberTicks = cax[ax].numberTicks;
axes[ax].tickInterval = cax[ax].tickInterval;
// for date axes
axes[ax].daTickInterval = cax[ax].daTickInterval;
}
plot.redraw();
cursor._zoom.isZoomed = false;
}
else {
var ctx = cursor.zoomCanvas._ctx;
ctx.clearRect(0,0,ctx.canvas.width, ctx.canvas.height);
}
plot.target.trigger('jqplotResetZoom', [plot, cursor]);
};
$.jqplot.Cursor.resetZoom = function(plot) {
plot.resetZoom();
};
$.jqplot.Cursor.prototype.doZoom = function (gridpos, datapos, plot, cursor) {
var c = cursor;
var axes = plot.axes;
var zaxes = c._zoom.axes;
var start = zaxes.start;
var end = zaxes.end;
var min, max;
var ctx = plot.plugins.cursor.zoomCanvas._ctx;
// don't zoom is zoom area is too small (in pixels)
if ((c.constrainZoomTo == 'none' && Math.abs(gridpos.x - c._zoom.start[0]) > 6 && Math.abs(gridpos.y - c._zoom.start[1]) > 6) || (c.constrainZoomTo == 'x' && Math.abs(gridpos.x - c._zoom.start[0]) > 6) || (c.constrainZoomTo == 'y' && Math.abs(gridpos.y - c._zoom.start[1]) > 6)) {
if (!plot.plugins.cursor.zoomProxy) {
for (var ax in datapos) {
// make a copy of the original axes to revert back.
if (c._zoom.axes[ax] == undefined) {
c._zoom.axes[ax] = {};
c._zoom.axes[ax].numberTicks = axes[ax].numberTicks;
c._zoom.axes[ax].tickInterval = axes[ax].tickInterval;
// for date axes...
c._zoom.axes[ax].daTickInterval = axes[ax].daTickInterval;
c._zoom.axes[ax].min = axes[ax].min;
c._zoom.axes[ax].max = axes[ax].max;
}
if ((c.constrainZoomTo == 'none') || (c.constrainZoomTo == 'x' && ax.charAt(0) == 'x') || (c.constrainZoomTo == 'y' && ax.charAt(0) == 'y')) {
dp = datapos[ax];
if (dp != null) {
if (dp > start[ax]) {
axes[ax].min = start[ax];
axes[ax].max = dp;
}
else {
span = start[ax] - dp;
axes[ax].max = start[ax];
axes[ax].min = dp;
}
axes[ax].tickInterval = null;
// for date axes...
axes[ax].daTickInterval = null;
axes[ax]._ticks = [];
}
}
// if ((c.constrainZoomTo == 'x' && ax.charAt(0) == 'y' && c.autoscaleConstraint) || (c.constrainZoomTo == 'y' && ax.charAt(0) == 'x' && c.autoscaleConstraint)) {
// dp = datapos[ax];
// if (dp != null) {
// axes[ax].max == null;
// axes[ax].min = null;
// }
// }
}
ctx.clearRect(0,0,ctx.canvas.width, ctx.canvas.height);
plot.redraw();
c._zoom.isZoomed = true;
}
plot.target.trigger('jqplotZoom', [gridpos, datapos, plot, cursor]);
}
};
$.jqplot.preInitHooks.push($.jqplot.Cursor.init);
$.jqplot.postDrawHooks.push($.jqplot.Cursor.postDraw);
function updateTooltip(gridpos, datapos, plot) {
var c = plot.plugins.cursor;
var s = '';
var addbr = false;
if (c.showTooltipGridPosition) {
s = gridpos.x+', '+gridpos.y;
addbr = true;
}
if (c.showTooltipUnitPosition) {
var g;
for (var i=0; i<c.tooltipAxisGroups.length; i++) {
g = c.tooltipAxisGroups[i];
if (addbr) {
s += '<br />';
}
if (c.useAxesFormatters) {
var xf = plot.axes[g[0]]._ticks[0].formatter;
var yf = plot.axes[g[1]]._ticks[0].formatter;
var xfstr = plot.axes[g[0]]._ticks[0].formatString;
var yfstr = plot.axes[g[1]]._ticks[0].formatString;
s += xf(xfstr, datapos[g[0]]) + ', '+ yf(yfstr, datapos[g[1]]);
}
else {
s += $.jqplot.sprintf(c.tooltipFormatString, datapos[g[0]], datapos[g[1]]);
}
addbr = true;
}
}
if (c.showTooltipDataPosition) {
var series = plot.series;
var ret = getIntersectingPoints(plot, gridpos.x, gridpos.y);
var addbr = false;
for (var i = 0; i< series.length; i++) {
if (series[i].show) {
var idx = series[i].index;
var label = series[i].label.toString();
var cellid = $.inArray(idx, ret.indices);
var sx = undefined;
var sy = undefined;
if (cellid != -1) {
var data = ret.data[cellid].data;
if (c.useAxesFormatters) {
var xf = series[i]._xaxis._ticks[0].formatter;
var yf = series[i]._yaxis._ticks[0].formatter;
var xfstr = series[i]._xaxis._ticks[0].formatString;
var yfstr = series[i]._yaxis._ticks[0].formatString;
sx = xf(xfstr, data[0]);
sy = yf(yfstr, data[1]);
}
else {
sx = data[0];
sy = data[1];
}
if (addbr) {
s += '<br />';
}
s += $.jqplot.sprintf(c.tooltipFormatString, label, sx, sy);
addbr = true;
}
}
}
}
c._tooltipElem.html(s);
}
function moveLine(gridpos, plot) {
var c = plot.plugins.cursor;
var ctx = c.cursorCanvas._ctx;
ctx.clearRect(0,0,ctx.canvas.width, ctx.canvas.height);
if (c.showVerticalLine) {
c.shapeRenderer.draw(ctx, [[gridpos.x, 0], [gridpos.x, ctx.canvas.height]]);
}
if (c.showHorizontalLine) {
c.shapeRenderer.draw(ctx, [[0, gridpos.y], [ctx.canvas.width, gridpos.y]]);
}
var ret = getIntersectingPoints(plot, gridpos.x, gridpos.y);
if (c.showCursorLegend) {
var cells = $(plot.targetId + ' td.jqplot-cursor-legend-label');
for (var i=0; i<cells.length; i++) {
var idx = $(cells[i]).data('seriesIndex');
var series = plot.series[idx];
var label = series.label.toString();
var cellid = $.inArray(idx, ret.indices);
var sx = undefined;
var sy = undefined;
if (cellid != -1) {
var data = ret.data[cellid].data;
if (c.useAxesFormatters) {
var xf = series._xaxis._ticks[0].formatter;
var yf = series._yaxis._ticks[0].formatter;
var xfstr = series._xaxis._ticks[0].formatString;
var yfstr = series._yaxis._ticks[0].formatString;
sx = xf(xfstr, data[0]);
sy = yf(yfstr, data[1]);
}
else {
sx = data[0];
sy = data[1];
}
}
if (plot.legend.escapeHtml) {
$(cells[i]).text($.jqplot.sprintf(c.cursorLegendFormatString, label, sx, sy));
}
else {
$(cells[i]).html($.jqplot.sprintf(c.cursorLegendFormatString, label, sx, sy));
}
}
}
}
function getIntersectingPoints(plot, x, y) {
var ret = {indices:[], data:[]};
var s, i, d0, d, j, r;
var threshold;
var c = plot.plugins.cursor;
for (var i=0; i<plot.series.length; i++) {
s = plot.series[i];
r = s.renderer;
if (s.show) {
threshold = c.intersectionThreshold;
if (s.showMarker) {
threshold += s.markerRenderer.size/2;
}
for (var j=0; j<s.gridData.length; j++) {
p = s.gridData[j];
// check vertical line
if (c.showVerticalLine) {
if (Math.abs(x-p[0]) <= threshold) {
ret.indices.push(i);
ret.data.push({seriesIndex: i, pointIndex:j, gridData:p, data:s.data[j]});
}
}
}
}
}
return ret;
}
function moveTooltip(gridpos, plot) {
var c = plot.plugins.cursor;
var elem = c._tooltipElem;
switch (c.tooltipLocation) {
case 'nw':
var x = gridpos.x + plot._gridPadding.left - elem.outerWidth(true) - c.tooltipOffset;
var y = gridpos.y + plot._gridPadding.top - c.tooltipOffset - elem.outerHeight(true);
break;
case 'n':
var x = gridpos.x + plot._gridPadding.left - elem.outerWidth(true)/2;
var y = gridpos.y + plot._gridPadding.top - c.tooltipOffset - elem.outerHeight(true);
break;
case 'ne':
var x = gridpos.x + plot._gridPadding.left + c.tooltipOffset;
var y = gridpos.y + plot._gridPadding.top - c.tooltipOffset - elem.outerHeight(true);
break;
case 'e':
var x = gridpos.x + plot._gridPadding.left + c.tooltipOffset;
var y = gridpos.y + plot._gridPadding.top - elem.outerHeight(true)/2;
break;
case 'se':
var x = gridpos.x + plot._gridPadding.left + c.tooltipOffset;
var y = gridpos.y + plot._gridPadding.top + c.tooltipOffset;
break;
case 's':
var x = gridpos.x + plot._gridPadding.left - elem.outerWidth(true)/2;
var y = gridpos.y + plot._gridPadding.top + c.tooltipOffset;
break;
case 'sw':
var x = gridpos.x + plot._gridPadding.left - elem.outerWidth(true) - c.tooltipOffset;
var y = gridpos.y + plot._gridPadding.top + c.tooltipOffset;
break;
case 'w':
var x = gridpos.x + plot._gridPadding.left - elem.outerWidth(true) - c.tooltipOffset;
var y = gridpos.y + plot._gridPadding.top - elem.outerHeight(true)/2;
break;
default:
var x = gridpos.x + plot._gridPadding.left + c.tooltipOffset;
var y = gridpos.y + plot._gridPadding.top + c.tooltipOffset;
break;
}
c._tooltipElem.css('left', x);
c._tooltipElem.css('top', y);
}
function positionTooltip(plot) {
// fake a grid for positioning
var grid = plot._gridPadding;
var c = plot.plugins.cursor;
var elem = c._tooltipElem;
switch (c.tooltipLocation) {
case 'nw':
var a = grid.left + c.tooltipOffset;
var b = grid.top + c.tooltipOffset;
elem.css('left', a);
elem.css('top', b);
break;
case 'n':
var a = (grid.left + (plot._plotDimensions.width - grid.right))/2 - elem.outerWidth(true)/2;
var b = grid.top + c.tooltipOffset;
elem.css('left', a);
elem.css('top', b);
break;
case 'ne':
var a = grid.right + c.tooltipOffset;
var b = grid.top + c.tooltipOffset;
elem.css({right:a, top:b});
break;
case 'e':
var a = grid.right + c.tooltipOffset;
var b = (grid.top + (plot._plotDimensions.height - grid.bottom))/2 - elem.outerHeight(true)/2;
elem.css({right:a, top:b});
break;
case 'se':
var a = grid.right + c.tooltipOffset;
var b = grid.bottom + c.tooltipOffset;
elem.css({right:a, bottom:b});
break;
case 's':
var a = (grid.left + (plot._plotDimensions.width - grid.right))/2 - elem.outerWidth(true)/2;
var b = grid.bottom + c.tooltipOffset;
elem.css({left:a, bottom:b});
break;
case 'sw':
var a = grid.left + c.tooltipOffset;
var b = grid.bottom + c.tooltipOffset;
elem.css({left:a, bottom:b});
break;
case 'w':
var a = grid.left + c.tooltipOffset;
var b = (grid.top + (plot._plotDimensions.height - grid.bottom))/2 - elem.outerHeight(true)/2;
elem.css({left:a, top:b});
break;
default: // same as 'se'
var a = grid.right - c.tooltipOffset;
var b = grid.bottom + c.tooltipOffset;
elem.css({right:a, bottom:b});
break;
}
}
function handleClick (ev, gridpos, datapos, neighbor, plot) {
ev.stopPropagation();
ev.preventDefault();
var c = plot.plugins.cursor;
if (c.clickReset) {
c.resetZoom(plot, c);
}
return false;
}
function handleDblClick (ev, gridpos, datapos, neighbor, plot) {
ev.stopPropagation();
ev.preventDefault();
var c = plot.plugins.cursor;
if (c.dblClickReset) {
c.resetZoom(plot, c);
}
return false;
}
function handleMouseLeave(ev, gridpos, datapos, neighbor, plot) {
var c = plot.plugins.cursor;
if (c.show) {
$(ev.target).css('cursor', c.previousCursor);
if (c.showTooltip) {
c._tooltipElem.hide();
}
if (c.zoom) {
c._zoom.started = false;
c._zoom.zooming = false;
if (!c.zoomProxy) {
var ctx = c.zoomCanvas._ctx;
ctx.clearRect(0,0,ctx.canvas.width, ctx.canvas.height);
}
}
if (c.showVerticalLine || c.showHorizontalLine) {
var ctx = c.cursorCanvas._ctx;
ctx.clearRect(0,0,ctx.canvas.width, ctx.canvas.height);
} if (c.showCursorLegend) {
var cells = $(plot.targetId + ' td.jqplot-cursor-legend-label');
for (var i=0; i<cells.length; i++) {
var idx = $(cells[i]).data('seriesIndex');
var series = plot.series[idx];
var label = series.label.toString();
if (plot.legend.escapeHtml) {
$(cells[i]).text($.jqplot.sprintf(c.cursorLegendFormatString, label, undefined, undefined));
}
else {
$(cells[i]).html($.jqplot.sprintf(c.cursorLegendFormatString, label, undefined, undefined));
}
}
}
}
}
function handleMouseEnter(ev, gridpos, datapos, neighbor, plot) {
var c = plot.plugins.cursor;
if (c.show) {
c.previousCursor = ev.target.style.cursor;
ev.target.style.cursor = c.style;
if (c.showTooltip) {
updateTooltip(gridpos, datapos, plot);
if (c.followMouse) {
moveTooltip(gridpos, plot);
}
else {
positionTooltip(plot);
}
c._tooltipElem.show();
}
if (c.showVerticalLine || c.showHorizontalLine) {
moveLine(gridpos, plot);
}
}
}
function handleMouseMove(ev, gridpos, datapos, neighbor, plot) {
var c = plot.plugins.cursor;
var ctx = c.zoomCanvas._ctx;
if (c.show) {
if (c.showTooltip) {
updateTooltip(gridpos, datapos, plot);
if (c.followMouse) {
moveTooltip(gridpos, plot);
}
}
if (c.zoom && c._zoom.started && !c.zoomTarget) {
c._zoom.zooming = true;
if (c.constrainZoomTo == 'x') {
c._zoom.end = [gridpos.x, ctx.canvas.height];
}
else if (c.constrainZoomTo == 'y') {
c._zoom.end = [ctx.canvas.width, gridpos.y];
}
else {
c._zoom.end = [gridpos.x, gridpos.y];
}
drawZoomBox.call(c);
}
if (c.showVerticalLine || c.showHorizontalLine) {
moveLine(gridpos, plot);
}
}
}
function handleMouseDown(ev, gridpos, datapos, neighbor, plot) {
var c = plot.plugins.cursor;
var axes = plot.axes;
if (c.zoom) {
if (!c.zoomProxy) {
var ctx = c.zoomCanvas._ctx;
ctx.clearRect(0,0,ctx.canvas.width, ctx.canvas.height);
}
if (c.constrainZoomTo == 'x') {
c._zoom.start = [gridpos.x, 0];
}
else if (c.constrainZoomTo == 'y') {
c._zoom.start = [0, gridpos.y];
}
else {
c._zoom.start = [gridpos.x, gridpos.y];
}
c._zoom.started = true;
for (var ax in datapos) {
// get zoom starting position.
c._zoom.axes.start[ax] = datapos[ax];
}
}
}
function handleMouseUp(ev, gridpos, datapos, neighbor, plot) {
var c = plot.plugins.cursor;
if (c.zoom && c._zoom.zooming && !c.zoomTarget) {
c.doZoom(gridpos, datapos, plot, c);
}
c._zoom.started = false;
c._zoom.zooming = false;
}
function drawZoomBox() {
var start = this._zoom.start;
var end = this._zoom.end;
var ctx = this.zoomCanvas._ctx;
var l, t, h, w;
if (end[0] > start[0]) {
l = start[0];
w = end[0] - start[0];
}
else {
l = end[0];
w = start[0] - end[0];
}
if (end[1] > start[1]) {
t = start[1];
h = end[1] - start[1];
}
else {
t = end[1];
h = start[1] - end[1];
}
ctx.fillStyle = 'rgba(0,0,0,0.2)';
ctx.strokeStyle = '#999999';
ctx.lineWidth = 1.0;
ctx.clearRect(0,0,ctx.canvas.width, ctx.canvas.height);
ctx.fillRect(0,0,ctx.canvas.width, ctx.canvas.height);
ctx.clearRect(l, t, w, h);
// IE won't show transparent fill rect, so stroke a rect also.
ctx.strokeRect(l,t,w,h);
}
$.jqplot.CursorLegendRenderer = function(options) {
$.jqplot.TableLegendRenderer.call(this, options);
this.formatString = '%s';
};
$.jqplot.CursorLegendRenderer.prototype = new $.jqplot.TableLegendRenderer();
$.jqplot.CursorLegendRenderer.prototype.constructor = $.jqplot.CursorLegendRenderer;
// called in context of a Legend
$.jqplot.CursorLegendRenderer.prototype.draw = function() {
if (this.show) {
var series = this._series;
// make a table. one line label per row.
this._elem = $('<table class="jqplot-legend jqplot-cursor-legend" style="position:absolute"></table>');
var pad = false;
for (var i = 0; i< series.length; i++) {
s = series[i];
if (s.show) {
var lt = $.jqplot.sprintf(this.formatString, s.label.toString());
if (lt) {
var color = s.color;
if (s._stack && !s.fill) {
color = '';
}
addrow.call(this, lt, color, pad, i);
pad = true;
}
// let plugins add more rows to legend. Used by trend line plugin.
for (var j=0; j<$.jqplot.addLegendRowHooks.length; j++) {
var item = $.jqplot.addLegendRowHooks[j].call(this, s);
if (item) {
addrow.call(this, item.label, item.color, pad);
pad = true;
}
}
}
}
}
function addrow(label, color, pad, idx) {
var rs = (pad) ? this.rowSpacing : '0';
var tr = $('<tr class="jqplot-legend jqplot-cursor-legend"></tr>').appendTo(this._elem);
tr.data('seriesIndex', idx);
$('<td class="jqplot-legend jqplot-cursor-legend-swatch" style="padding-top:'+rs+';">'+
'<div style="border:1px solid #cccccc;padding:0.2em;">'+
'<div class="jqplot-cursor-legend-swatch" style="background-color:'+color+';"></div>'+
'</div></td>').appendTo(tr);
var td = $('<td class="jqplot-legend jqplot-cursor-legend-label" style="vertical-align:middle;padding-top:'+rs+';"></td>');
td.appendTo(tr);
td.data('seriesIndex', idx);
if (this.escapeHtml) {
td.text(label);
}
else {
td.html(label);
}
}
return this._elem;
};
})(jQuery);