META-INF.assets.rjzjh.echarts.src.component.helper.sliderMove.js Maven / Gradle / Ivy
define(function (require) {
/**
* Calculate slider move result.
*
* @param {number} delta Move length.
* @param {Array.} handleEnds handleEnds[0] and be bigger then handleEnds[1].
* handleEnds will be modified in this method.
* @param {Array.} extent handleEnds is restricted by extent.
* extent[0] should less or equals than extent[1].
* @param {string} mode 'rigid': Math.abs(handleEnds[0] - handleEnds[1]) remain unchanged,
* 'cross' handleEnds[0] can be bigger then handleEnds[1],
* 'push' handleEnds[0] can not be bigger then handleEnds[1],
* when they touch, one push other.
* @param {number} handleIndex If mode is 'rigid', handleIndex is not required.
* @param {Array.} The input handleEnds.
*/
return function (delta, handleEnds, extent, mode, handleIndex) {
if (!delta) {
return handleEnds;
}
if (mode === 'rigid') {
delta = getRealDelta(delta, handleEnds, extent);
handleEnds[0] += delta;
handleEnds[1] += delta;
}
else {
delta = getRealDelta(delta, handleEnds[handleIndex], extent);
handleEnds[handleIndex] += delta;
if (mode === 'push' && handleEnds[0] > handleEnds[1]) {
handleEnds[1 - handleIndex] = handleEnds[handleIndex];
}
}
return handleEnds;
function getRealDelta(delta, handleEnds, extent) {
var handleMinMax = !handleEnds.length
? [handleEnds, handleEnds]
: handleEnds.slice();
handleEnds[0] > handleEnds[1] && handleMinMax.reverse();
if (delta < 0 && handleMinMax[0] + delta < extent[0]) {
delta = extent[0] - handleMinMax[0];
}
if (delta > 0 && handleMinMax[1] + delta > extent[1]) {
delta = extent[1] - handleMinMax[1];
}
return delta;
}
};
});