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This commit is contained in:
Valera Rozuvan
2012-12-19 07:47:36 +02:00
committed by Alexander Kryklia
parent 3eb3d7db13
commit 1ffb091139
1 changed files with 106 additions and 47 deletions
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153
common/lib/xmodule/xmodule/js/src/graphical_slider_tool/graph.js
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@@ -22,6 +22,10 @@ define('Graph', ['logme'], function (logme) {
plotDiv.width(300);
}
// Sometimes, when height is not explicitly set via CSS (or by some
// other means), it is 0 pixels by default. When Flot will try to plot
// a graph in this DIV with 0 height, then it will raise an error. To
// prevent this, we will set it to be equal to the width.
if (plotDiv.height() === 0) {
plotDiv.height(plotDiv.width());
}
@@ -84,7 +88,7 @@ define('Graph', ['logme'], function (logme) {
return;
function processTicks(ticksStr, ticksObj, unitsType) {
var ticksBlobs, tempFloat;
var ticksBlobs, tempFloat, tempTicks, c1, c2;
// The 'ticks' setting is a string containing 3 floating-point
// numbers.
@@ -137,13 +141,83 @@ define('Graph', ['logme'], function (logme) {
// units: change last tick to units
if (typeof config.plot[unitsType] === 'string') {
var ticks = _.map(_.range(ticksObj.min,
ticksObj.max + ticksObj.tickSize, ticksObj.tickSize),
function(x){ return [x,
x > ticksObj.max - ticksObj.tickSize ? config.plot[unitsType] : x];
});
tempTicks = [];
for (c1 = ticksObj.min; c1 <= ticksObj.max; c1 += ticksObj.tickSize) {
c2 = roundToPrec(c1, ticksObj.tickSize);
tempTicks.push([c2, c2]);
}
tempTicks.pop();
tempTicks.push([
roundToPrec(ticksObj.max, ticksObj.tickSize),
config.plot[unitsType]
]);
ticksObj.tickSize = null;
ticksObj.ticks = ticks;
ticksObj.ticks = tempTicks;
}
return;
function roundToPrec(num, prec) {
var c1, tn1, tn2, digitsBefore, digitsAfter;
tn1 = Math.abs(num);
tn2 = Math.abs(prec);
// Find out number of digits BEFORE the decimal point.
c1 = 0;
tn1 = Math.abs(num);
while (tn1 >= 1) {
c1 += 1;
tn1 /= 10;
}
digitsBefore = c1;
// Find out number of digits AFTER the decimal point.
c1 = 0;
tn1 = Math.abs(num);
while (Math.round(tn1) !== tn1) {
c1 += 1;
tn1 *= 10;
}
digitsAfter = c1;
// For precision, find out number of digits AFTER the
// decimal point.
c1 = 0;
while (Math.round(tn2) !== tn2) {
c1 += 1;
tn2 *= 10;
}
// If precision is more than 1 (no digits after decimal
// points).
if (c1 === 0) {
return num;
}
// If the precision contains digits after the decimal
// point, we apply special rules.
else {
tn1 = Math.abs(num);
if (digitsAfter > c1) {
tn1 = tn1.toPrecision(digitsBefore + c1);
} else {
tn1 = tn1.toPrecision(digitsBefore + digitsAfter);
}
}
if (num < 0) {
return -tn1;
}
return tn1;
}
}
}
@@ -190,46 +264,39 @@ define('Graph', ['logme'], function (logme) {
try {
xrange.max = Function.apply(null, allParamNames);
} catch (err) {
logme('ERROR: could not create a function from the string "' + config.plot.xrange.min + '" for xrange.min.');
logme('ERROR: could not create a function from the string "' + config.plot.xrange.max + '" for xrange.max.');
return false;
}
allParamNames.pop();
logme('xrange = ', xrange);
if (typeof config.plot.num_points !== 'string') {
logme('ERROR: config.plot.num_points is not a string.');
logme('config.plot.num_points = ', config.plot.num_points);
// The user can specify the number of points. However, internally
// we will use it to generate a 'step' - i.e. the distance (on
// x-axis) between two adjacent points.
if (typeof config.plot.num_points === 'string') {
tempNum = parseInt(config.plot.num_points, 10);
if (isNaN(tempNum) === true) {
logme('ERROR: Could not parse the number of points.');
logme('config.plot.num_points = ', config.plot.num_points);
return false;
}
if (
(tempNum < 2) &&
(tempNum > 1000)
) {
logme('ERROR: Number of points is outside the allowed range [2, 1000]');
logme('config.plot.num_points = ' + tempNum);
return false;
}
numPoints = tempNum;
} else {
logme('MESSAGE: config.plot.num_points is not a string.');
logme('Will set number of points to {width of graph} / 10.');
numPoints = plotDiv.width() / 10.0;
logme('numPoints = ' + numPoints);
return false;
}
tempNum = parseInt(config.plot.num_points, 10);
if (isFinite(tempNum) === false) {
logme('ERROR: Expected config.plot.num_points to be a a valid integer. It is not.');
logme('config.plot.num_points = ', config.plot.num_points);
return false;
}
if (
(tempNum < 2) &&
(tempNum > 1000)
) {
logme('ERROR: Number of points is outside the allowed range [2, 1000]');
logme('config.plot.num_points = ' + tempNum);
return false;
}
numPoints = tempNum;
return true;
}
@@ -311,8 +378,6 @@ define('Graph', ['logme'], function (logme) {
// will break.
funcString = $('<div>').html(funcString).text();
logme('funcString = ' + funcString);
// Some defaults. If no options are set for the graph, we will
// make sure that at least a line is drawn for a function.
newFunctionObject = {
@@ -324,8 +389,6 @@ define('Graph', ['logme'], function (logme) {
// XML.
paramNames = state.getAllParameterNames();
logme('allParamNames = ', paramNames);
// The 'x' is always one of the function parameters.
paramNames.push('x');
@@ -333,8 +396,6 @@ define('Graph', ['logme'], function (logme) {
// the Function constructor.
paramNames.push(funcString);
console.log('paramNames = ', paramNames);
// Create the function from the function string, and all of the
// available parameters AND the 'x' variable as it's parameters.
// For this we will use the built-in Function object
@@ -431,8 +492,6 @@ define('Graph', ['logme'], function (logme) {
end = xrange.max.apply(window, paramValues);
step = (end - start) / (numPoints - 1);
logme('start = ' + start + ', end = ' + end + ', step = ' + step);
// Generate the data points.
for (x = start; x <= end; x += step) {