zettapi_client
Version:
Client side CRUD operations in angular to use with zettapi_server rest api to get started quickly in any CMS project
126 lines (103 loc) • 3.78 kB
JavaScript
module.exports = function(Chart) {
var helpers = Chart.helpers,
noop = helpers.noop;
Chart.LinearScaleBase = Chart.Scale.extend({
handleTickRangeOptions: function() {
var me = this;
var opts = me.options;
var tickOpts = opts.ticks;
// If we are forcing it to begin at 0, but 0 will already be rendered on the chart,
// do nothing since that would make the chart weird. If the user really wants a weird chart
// axis, they can manually override it
if (tickOpts.beginAtZero) {
var minSign = helpers.sign(me.min);
var maxSign = helpers.sign(me.max);
if (minSign < 0 && maxSign < 0) {
// move the top up to 0
me.max = 0;
} else if (minSign > 0 && maxSign > 0) {
// move the botttom down to 0
me.min = 0;
}
}
if (tickOpts.min !== undefined) {
me.min = tickOpts.min;
} else if (tickOpts.suggestedMin !== undefined) {
me.min = Math.min(me.min, tickOpts.suggestedMin);
}
if (tickOpts.max !== undefined) {
me.max = tickOpts.max;
} else if (tickOpts.suggestedMax !== undefined) {
me.max = Math.max(me.max, tickOpts.suggestedMax);
}
if (me.min === me.max) {
me.max++;
if (!tickOpts.beginAtZero) {
me.min--;
}
}
},
getTickLimit: noop,
handleDirectionalChanges: noop,
buildTicks: function() {
var me = this;
var opts = me.options;
var ticks = me.ticks = [];
var tickOpts = opts.ticks;
var getValueOrDefault = helpers.getValueOrDefault;
// Figure out what the max number of ticks we can support it is based on the size of
// the axis area. For now, we say that the minimum tick spacing in pixels must be 50
// We also limit the maximum number of ticks to 11 which gives a nice 10 squares on
// the graph
var maxTicks = me.getTickLimit();
// Make sure we always have at least 2 ticks
maxTicks = Math.max(2, maxTicks);
// To get a "nice" value for the tick spacing, we will use the appropriately named
// "nice number" algorithm. See http://stackoverflow.com/questions/8506881/nice-label-algorithm-for-charts-with-minimum-ticks
// for details.
var spacing;
var fixedStepSizeSet = (tickOpts.fixedStepSize && tickOpts.fixedStepSize > 0) || (tickOpts.stepSize && tickOpts.stepSize > 0);
if (fixedStepSizeSet) {
spacing = getValueOrDefault(tickOpts.fixedStepSize, tickOpts.stepSize);
} else {
var niceRange = helpers.niceNum(me.max - me.min, false);
spacing = helpers.niceNum(niceRange / (maxTicks - 1), true);
}
var niceMin = Math.floor(me.min / spacing) * spacing;
var niceMax = Math.ceil(me.max / spacing) * spacing;
var numSpaces = (niceMax - niceMin) / spacing;
// If very close to our rounded value, use it.
if (helpers.almostEquals(numSpaces, Math.round(numSpaces), spacing / 1000)) {
numSpaces = Math.round(numSpaces);
} else {
numSpaces = Math.ceil(numSpaces);
}
// Put the values into the ticks array
ticks.push(tickOpts.min !== undefined ? tickOpts.min : niceMin);
for (var j = 1; j < numSpaces; ++j) {
ticks.push(niceMin + (j * spacing));
}
ticks.push(tickOpts.max !== undefined ? tickOpts.max : niceMax);
me.handleDirectionalChanges();
// At this point, we need to update our max and min given the tick values since we have expanded the
// range of the scale
me.max = helpers.max(ticks);
me.min = helpers.min(ticks);
if (tickOpts.reverse) {
ticks.reverse();
me.start = me.max;
me.end = me.min;
} else {
me.start = me.min;
me.end = me.max;
}
},
convertTicksToLabels: function() {
var me = this;
me.ticksAsNumbers = me.ticks.slice();
me.zeroLineIndex = me.ticks.indexOf(0);
Chart.Scale.prototype.convertTicksToLabels.call(me);
}
});
};
;