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GST work in progress. Added point size. Added ability to redirect function output to element. Updated some example demos. Refactoring code.

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This commit is contained in:
Valera Rozuvan
2012-12-19 12:00:58 +02:00
committed by Alexander Kryklia
parent 1ffb091139
commit b8ea29c0d2
5 changed files with 215 additions and 45 deletions
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1
common/lib/xmodule/xmodule/gst_module.py
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@@ -32,6 +32,7 @@ class GraphicalSliderToolModule(XModule):
resource_string(__name__, 'js/src/graphical_slider_tool/sliders.js'),
resource_string(__name__, 'js/src/graphical_slider_tool/inputs.js'),
resource_string(__name__, 'js/src/graphical_slider_tool/graph.js'),
resource_string(__name__, 'js/src/graphical_slider_tool/el_output.js'),
resource_string(__name__, 'js/src/graphical_slider_tool/gst.js')
]

97
common/lib/xmodule/xmodule/js/src/graphical_slider_tool/el_output.js Normal file
View File

@@ -0,0 +1,97 @@
// Wrapper for RequireJS. It will make the standard requirejs(), require(), and
// define() functions from Require JS available inside the anonymous function.
(function (requirejs, require, define) {
define('ElOutput', ['logme'], function (logme) {
return ElOutput;
function ElOutput(config, state) {
if ($.isPlainObject(config.plot.function)) {
processFuncObj(config.plot.function);
} else if ($.isArray(config.plot.function)) {
(function (c1) {
while (c1 < config.plot.function.length) {
if ($.isPlainObject(config.plot.function[c1])) {
processFuncObj(config.plot.function[c1]);
}
c1 += 1;
}
}(0));
}
return;
function processFuncObj(obj) {
var outputEl, paramNames, funcString, func;
// We are only interested in functions that are meant for output to an
// element.
if (typeof obj['@output'] !== 'string') {
return;
}
if (obj['@output'].toLowerCase() !== 'element') {
return;
}
if (typeof obj['@el_id'] !== 'string') {
logme('ERROR: You specified "output" as "element", but did not spify "el_id".');
return;
}
if (typeof obj['#text'] !== 'string') {
logme('ERROR: Function body is not defined.');
return;
}
funcString = obj['#text'];
// Make sure that all HTML entities are converted to their proper
// ASCII text equivalents.
funcString = $('<div>').html(funcString).text();
outputEl = $('#' + obj['@el_id']);
if (outputEl.length !== 1) {
logme('ERROR: The element with id "' + obj['@el_id'] + '" was not found.');
return;
}
paramNames = state.getAllParameterNames();
paramNames.push(funcString);
try {
func = Function.apply(null, paramNames);
} catch (err) {
logme(
'ERROR: The function body "' +
funcString +
'" was not converted by the Function constructor.'
);
paramNames.pop();
return;
}
paramNames.pop();
outputEl.html(func.apply(window, state.getAllParameterValues()));
state.addDynamicEl(outputEl, func);
}
}
});
// End of wrapper for RequireJS. As you can see, we are passing
// namespaced Require JS variables to an anonymous function. Within
// it, you can use the standard requirejs(), require(), and define()
// functions as if they were in the global namespace.
}(RequireJS.requirejs, RequireJS.require, RequireJS.define)); // End-of: (function (requirejs, require, define)

137
common/lib/xmodule/xmodule/js/src/graphical_slider_tool/graph.js
View File

@@ -32,16 +32,21 @@ define('Graph', ['logme'], function (logme) {
// Configure some settings for the graph.
if (setGraphXRange() === false) {
logme('ERROR: could not configure the xrange. Will not continue.');
logme('ERROR: Could not configure the xrange. Will not continue.');
return;
}
setGraphAxes();
if (setGraphAxes() === false) {
logme('ERROR: Could not process configuration for the axes.');
return;
}
// Get the user defined functions. If there aren't any, don't do
// anything else.
createFunctions();
if (functions.length === 0) {
logme('ERROR: No functions were specified, or something went wrong.');
@@ -49,8 +54,9 @@ define('Graph', ['logme'], function (logme) {
}
// Create the initial graph and plot it for the user to see.
generateData();
updatePlot();
if (generateData() === true) {
updatePlot();
}
// Bind an event. Whenever some constant changes, the graph will be
// redrawn
@@ -59,33 +65,33 @@ define('Graph', ['logme'], function (logme) {
return;
function setGraphAxes() {
// Define the xaxis Flot configuration, and then see if the user
// supplied custom values.
xaxis = {
'min': 0,
'tickSize': 1,
'max': 10
};
xaxis = {};
if (typeof config.plot['xticks'] === 'string') {
processTicks(config.plot['xticks'], xaxis, 'xunits');
if (processTicks(config.plot['xticks'], xaxis, 'xunits') === false) {
logme('ERROR: Could not process the ticks for x-axis.');
return false;
}
} else {
logme('MESSAGE: "xticks" were not specified. Using defaults.');
return false;
}
// Define the yaxis Flot configuration, and then see if the user
// supplied custom values.
yaxis = {
'min': 0,
'tickSize': 1,
'max': 10
};
yaxis = {};
if (typeof config.plot['yticks'] === 'string') {
processTicks(config.plot['yticks'], yaxis, 'yunits');
if (processTicks(config.plot['yticks'], yaxis, 'yunits') === false) {
logme('ERROR: Could not process the ticks for y-axis.');
return false;
}
} else {
logme('MESSAGE: "yticks" were not specified. Using defaults.');
return false;
}
return;
return true;
function processTicks(ticksStr, ticksObj, unitsType) {
var ticksBlobs, tempFloat, tempTicks, c1, c2;
@@ -97,7 +103,7 @@ define('Graph', ['logme'], function (logme) {
if (ticksBlobs.length !== 3) {
logme('ERROR: Did not get 3 blobs from ticksStr = "' + ticksStr + '".');
return;
return false;
}
tempFloat = parseFloat(ticksBlobs[0]);
@@ -105,6 +111,8 @@ define('Graph', ['logme'], function (logme) {
ticksObj.min = tempFloat;
} else {
logme('ERROR: Invalid "min". ticksBlobs[0] = ', ticksBlobs[0]);
return false;
}
tempFloat = parseFloat(ticksBlobs[1]);
@@ -112,6 +120,8 @@ define('Graph', ['logme'], function (logme) {
ticksObj.tickSize = tempFloat;
} else {
logme('ERROR: Invalid "tickSize". ticksBlobs[1] = ', ticksBlobs[1]);
return false;
}
tempFloat = parseFloat(ticksBlobs[2]);
@@ -119,24 +129,25 @@ define('Graph', ['logme'], function (logme) {
ticksObj.max = tempFloat;
} else {
logme('ERROR: Invalid "max". ticksBlobs[2] = ', ticksBlobs[2]);
return false;
}
// Is the starting tick to the left of the ending tick (on the
// x-axis)? If not, set default starting and ending tick.
if (ticksObj.min >= ticksObj.max) {
logme('ERROR: min >= max. Setting defaults.');
logme('ERROR: Ticks min >= max.');
ticksObj.min = 0;
ticksObj.max = 10;
return false;
}
// Make sure the range makes sense - i.e. that there are at
// least 3 ticks. If not, set a tickSize which will produce
// 11 ticks. tickSize is the spacing between the ticks.
if (ticksObj.tickSize * 2 >= ticksObj.max - ticksObj.min) {
logme('ERROR: tickSize * 2 >= max - min. Setting defaults.');
if (ticksObj.tickSize > ticksObj.max - ticksObj.min) {
logme('ERROR: tickSize > max - min.');
ticksObj.tickSize = (ticksObj.max - ticksObj.min) / 10.0;
return false;
}
// units: change last tick to units
@@ -158,7 +169,11 @@ define('Graph', ['logme'], function (logme) {
ticksObj.ticks = tempTicks;
}
return;
// ticksObj.font = {
// 'size': '16px'
// };
return true;
function roundToPrec(num, prec) {
var c1, tn1, tn2, digitsBefore, digitsAfter;
@@ -354,16 +369,36 @@ define('Graph', ['logme'], function (logme) {
// properties as parameters. Rather than writing them out every
// time, we will have a single place where it is done.
function callAddFunction(obj) {
if (typeof obj['@output'] === 'string') {
// If this function is meant to be calculated for an
// element then skip it.
if (obj['@output'].toLowerCase() === 'element') {
return;
}
// It is an error if "output" is not "element" or "graph".
// Though you can ommit the "output" attribute.
else if (obj['@output'].toLowerCase() !== 'graph') {
logme('ERROR: Function "output" attribute can be either "div" or "graph".');
return;
}
}
// The user did not specify an "output" attribute, or it is
// "graph".
addFunction(
obj['#text'],
obj['@color'],
obj['@line'],
obj['@dot'],
obj['@label']
obj['@label'],
obj['@point_size']
);
}
function addFunction(funcString, color, line, dot, label) {
function addFunction(funcString, color, line, dot, label, pointSize) {
var newFunctionObject, func, paramNames;
// The main requirement is function string. Without it we can't
@@ -407,14 +442,15 @@ define('Graph', ['logme'], function (logme) {
try {
func = Function.apply(null, paramNames);
} catch (err) {
// Let's tell the user. He will see a nice red error
// message instead of a graph.
plotDiv.html(
'<span style="color: red;">' +
'Error while parsing JavaScript function body string!' +
'</span>'
logme(
'ERROR: The function body "' +
funcString +
'" was not converted by the Function constructor.'
);
paramNames.pop();
paramNames.pop();
return;
}
@@ -445,6 +481,10 @@ define('Graph', ['logme'], function (logme) {
}
}
if (typeof pointSize === 'string') {
newFunctionObject['pointSize'] = pointSize;
}
// If the preference is conflicting (we must have either line
// or dot, none is not an option), we will show line.
if (
@@ -465,8 +505,9 @@ define('Graph', ['logme'], function (logme) {
// The callback that will be called whenever a constant changes (gets
// updated via a slider or a text input).
function onUpdatePlot(event) {
generateData();
updatePlot();
if (generateData() === true) {
updatePlot();
}
}
function generateData() {
@@ -501,7 +542,14 @@ define('Graph', ['logme'], function (logme) {
// We call the user defined function, passing all of the
// available parameter values. Inside this function they
// will be accessible by their names.
y = functionObj.func.apply(window, paramValues);
try {
y = functionObj.func.apply(window, paramValues);
} catch (err) {
logme('ERROR: Could not generate data.');
logme('Error message: "' + err.message + '".');
return false;
}
// Return the paramValues array to how it was before we
// added 'x' variable to the end of it.
@@ -549,14 +597,21 @@ define('Graph', ['logme'], function (logme) {
'show': functionObj.dot
};
if (functionObj.hasOwnProperty('pointSize')) {
seriesObj.points.radius = functionObj.pointSize;
}
// Add the newly created series object to the series set which
// will be plotted by Flot.
dataSeries.push(seriesObj);
}
}
return true;
} // End-of: function generateData
function updatePlot() {
// Tell Flot to draw the graph to our specification.
$.plot(
plotDiv,
dataSeries,

7
common/lib/xmodule/xmodule/js/src/graphical_slider_tool/gst_main.js
View File

@@ -8,8 +8,8 @@ define(
// Even though it is not explicitly in this module, we have to specify
// 'GeneralMethods' as a dependency. It expands some of the core JS objects
// with additional useful methods that are used in other modules.
['State', 'GeneralMethods', 'Sliders', 'Inputs', 'Graph', 'logme'],
function (State, GeneralMethods, Sliders, Inputs, Graph, logme) {
['State', 'GeneralMethods', 'Sliders', 'Inputs', 'Graph', 'ElOutput', 'logme'],
function (State, GeneralMethods, Sliders, Inputs, Graph, ElOutput, logme) {
return GstMain;
@@ -67,6 +67,9 @@ define(
// Configure and display the graph. Attach event for the graph to be
// updated on any change of a slider or a text input.
Graph(gstId, config, state);
// Configure functions that output to an element instead of the graph.
ElOutput(config, state);
}
});

18
common/lib/xmodule/xmodule/js/src/graphical_slider_tool/state.js
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@@ -18,7 +18,9 @@ define('State', ['logme'], function (logme) {
function State(gstId, config) {
var parameters, allParameterNames, allParameterValues,
plotDiv;
plotDiv, dynamicEl;
dynamicEl = [];
stateInst += 1;
logme('MESSAGE: Creating state instance # ' + stateInst + '.');
@@ -92,7 +94,8 @@ define('State', ['logme'], function (logme) {
'getAllParameterNames': getAllParameterNames,
'getAllParameterValues': getAllParameterValues,
'bindUpdatePlotEvent': bindUpdatePlotEvent
'bindUpdatePlotEvent': bindUpdatePlotEvent,
'addDynamicEl': addDynamicEl
};
function getAllParameterNames() {
@@ -119,6 +122,13 @@ define('State', ['logme'], function (logme) {
plotDiv.bind('update_plot', callback);
}
function addDynamicEl(outputEl, func) {
dynamicEl.push({
'outputEl': outputEl,
'func': func
});
}
function getParameterValue(paramName) {
// If the name of the constant is not tracked by state, return an
@@ -238,6 +248,10 @@ define('State', ['logme'], function (logme) {
// Update the helper array with the new parameter's value.
allParameterValues[parameters[paramName].helperArrayIndex] = paramValueNum;
for (c1 = 0; c1 < dynamicEl.length; c1++) {
dynamicEl[c1].outputEl.html(dynamicEl[c1].func.apply(window, allParameterValues));
}
return true;
} // End-of: function setParameterValue