/** * This class we summarize the data and returns it when required. */Ext.define("Ext.draw.SegmentTree", { config: { strategy: "double" }, /** * @private * @param {Object} result * @param {Number} last * @param {Number} dataX * @param {Number} dataOpen * @param {Number} dataHigh * @param {Number} dataLow * @param {Number} dataClose */ time: function (result, last, dataX, dataOpen, dataHigh, dataLow, dataClose) { var start = 0, lastOffset, lastOffsetEnd, minimum = new Date(dataX[result.startIdx[0]]), maximum = new Date(dataX[result.endIdx[last - 1]]), extDate = Ext.Date, units = [ [extDate.MILLI, 1, 'ms1', null], [extDate.MILLI, 2, 'ms2', 'ms1'], [extDate.MILLI, 5, 'ms5', 'ms1'], [extDate.MILLI, 10, 'ms10', 'ms5'], [extDate.MILLI, 50, 'ms50', 'ms10'], [extDate.MILLI, 100, 'ms100', 'ms50'], [extDate.MILLI, 500, 'ms500', 'ms100'], [extDate.SECOND, 1, 's1', 'ms500'], [extDate.SECOND, 10, 's10', 's1'], [extDate.SECOND, 30, 's30', 's10'], [extDate.MINUTE, 1, 'mi1', 's10'], [extDate.MINUTE, 5, 'mi5', 'mi1'], [extDate.MINUTE, 10, 'mi10', 'mi5'], [extDate.MINUTE, 30, 'mi30', 'mi10'], [extDate.HOUR, 1, 'h1', 'mi30'], [extDate.HOUR, 6, 'h6', 'h1'], [extDate.HOUR, 12, 'h12', 'h6'], [extDate.DAY, 1, 'd1', 'h12'], [extDate.DAY, 7, 'd7', 'd1'], [extDate.MONTH, 1, 'mo1', 'd1'], [extDate.MONTH, 3, 'mo3', 'mo1'], [extDate.MONTH, 6, 'mo6', 'mo3'], [extDate.YEAR, 1, 'y1', 'mo3'], [extDate.YEAR, 5, 'y5', 'y1'], [extDate.YEAR, 10, 'y10', 'y5'], [extDate.YEAR, 100, 'y100', 'y10'] ], unitIdx, currentUnit, plainStart = start, plainEnd = last, first = false, startIdxs = result.startIdx, endIdxs = result.endIdx, minIdxs = result.minIdx, maxIdxs = result.maxIdx, opens = result.open, closes = result.close, minXs = result.minX, minYs = result.minY, maxXs = result.maxX, maxYs = result.maxY, i, current; for (unitIdx = 0; last > start + 1 && unitIdx < units.length; unitIdx++) { minimum = new Date(dataX[startIdxs[0]]); currentUnit = units[unitIdx]; minimum = extDate.align(minimum, currentUnit[0], currentUnit[1]); if (extDate.diff(minimum, maximum, currentUnit[0]) > dataX.length * 2 * currentUnit[1]) { continue; } if (currentUnit[3] && result.map['time_' + currentUnit[3]]) { lastOffset = result.map['time_' + currentUnit[3]][0]; lastOffsetEnd = result.map['time_' + currentUnit[3]][1]; } else { lastOffset = plainStart; lastOffsetEnd = plainEnd; } start = last; current = minimum; first = true; startIdxs[last] = startIdxs[lastOffset]; endIdxs[last] = endIdxs[lastOffset]; minIdxs[last] = minIdxs[lastOffset]; maxIdxs[last] = maxIdxs[lastOffset]; opens[last] = opens[lastOffset]; closes[last] = closes[lastOffset]; minXs[last] = minXs[lastOffset]; minYs[last] = minYs[lastOffset]; maxXs[last] = maxXs[lastOffset]; maxYs[last] = maxYs[lastOffset]; current = Ext.Date.add(current, currentUnit[0], currentUnit[1]); for (i = lastOffset + 1; i < lastOffsetEnd; i++) { if (dataX[endIdxs[i]] < +current) { endIdxs[last] = endIdxs[i]; closes[last] = closes[i]; if (maxYs[i] > maxYs[last]) { maxYs[last] = maxYs[i]; maxXs[last] = maxXs[i]; maxIdxs[last] = maxIdxs[i]; } if (minYs[i] < minYs[last]) { minYs[last] = minYs[i]; minXs[last] = minXs[i]; minIdxs[last] = minIdxs[i]; } } else { last++; startIdxs[last] = startIdxs[i]; endIdxs[last] = endIdxs[i]; minIdxs[last] = minIdxs[i]; maxIdxs[last] = maxIdxs[i]; opens[last] = opens[i]; closes[last] = closes[i]; minXs[last] = minXs[i]; minYs[last] = minYs[i]; maxXs[last] = maxXs[i]; maxYs[last] = maxYs[i]; current = Ext.Date.add(current, currentUnit[0], currentUnit[1]); } } if (last > start) { result.map['time_' + currentUnit[2]] = [start, last]; } } }, /** * @private * @param {Object} result * @param {Number} position * @param {Number} dataX * @param {Number} dataOpen * @param {Number} dataHigh * @param {Number} dataLow * @param {Number} dataClose */ "double": function (result, position, dataX, dataOpen, dataHigh, dataLow, dataClose) { var offset = 0, lastOffset, step = 1, i, startIdx, endIdx, minIdx, maxIdx, open, close, minX, minY, maxX, maxY; while (position > offset + 1) { lastOffset = offset; offset = position; step += step; for (i = lastOffset; i < offset; i += 2) { if (i === offset - 1) { startIdx = result.startIdx[i]; endIdx = result.endIdx[i]; minIdx = result.minIdx[i]; maxIdx = result.maxIdx[i]; open = result.open[i]; close = result.close[i]; minX = result.minX[i]; minY = result.minY[i]; maxX = result.maxX[i]; maxY = result.maxY[i]; } else { startIdx = result.startIdx[i]; endIdx = result.endIdx[i + 1]; open = result.open[i]; close = result.close[i]; if (result.minY[i] <= result.minY[i + 1]) { minIdx = result.minIdx[i]; minX = result.minX[i]; minY = result.minY[i]; } else { minIdx = result.minIdx[i + 1]; minX = result.minX[i + 1]; minY = result.minY[i + 1]; } if (result.maxY[i] >= result.maxY[i + 1]) { maxIdx = result.maxIdx[i]; maxX = result.maxX[i]; maxY = result.maxY[i]; } else { maxIdx = result.maxIdx[i + 1]; maxX = result.maxX[i + 1]; maxY = result.maxY[i + 1]; } } result.startIdx[position] = startIdx; result.endIdx[position] = endIdx; result.minIdx[position] = minIdx; result.maxIdx[position] = maxIdx; result.open[position] = open; result.close[position] = close; result.minX[position] = minX; result.minY[position] = minY; result.maxX[position] = maxX; result.maxY[position] = maxY; position++; } result.map['double_' + step] = [offset, position]; } }, /** * @private */ none: Ext.emptyFn, /** * @private * * @param {Number} dataX * @param {Number} dataOpen * @param {Number} dataHigh * @param {Number} dataLow * @param {Number} dataClose * @return {Object} */ aggregateData: function (dataX, dataOpen, dataHigh, dataLow, dataClose) { var length = dataX.length, startIdx = [], endIdx = [], minIdx = [], maxIdx = [], open = [], minX = [], minY = [], maxX = [], maxY = [], close = [], result = { startIdx: startIdx, endIdx: endIdx, minIdx: minIdx, maxIdx: maxIdx, open: open, minX: minX, minY: minY, maxX: maxX, maxY: maxY, close: close }, i; for (i = 0; i < length; i++) { startIdx[i] = i; endIdx[i] = i; minIdx[i] = i; maxIdx[i] = i; open[i] = dataOpen[i]; minX[i] = dataX[i]; minY[i] = dataLow[i]; maxX[i] = dataX[i]; maxY[i] = dataHigh[i]; close[i] = dataClose[i]; } result.map = { original: [0, length] }; if (length) { this[this.getStrategy()](result, length, dataX, dataOpen, dataHigh, dataLow, dataClose); } return result; }, /** * @private * @param {Object} items * @param {Number} start * @param {Number} end * @param {Number} key * @return {*} */ binarySearchMin: function (items, start, end, key) { var dx = this.dataX; if (key <= dx[items.startIdx[0]]) { return start; } if (key >= dx[items.startIdx[end - 1]]) { return end - 1; } while (start + 1 < end) { var mid = (start + end) >> 1, val = dx[items.startIdx[mid]]; if (val === key) { return mid; } else if (val < key) { start = mid; } else { end = mid; } } return start; }, /** * @private * @param {Object} items * @param {Number} start * @param {Number} end * @param {Number} key * @return {*} */ binarySearchMax: function (items, start, end, key) { var dx = this.dataX; if (key <= dx[items.endIdx[0]]) { return start; } if (key >= dx[items.endIdx[end - 1]]) { return end - 1; } while (start + 1 < end) { var mid = (start + end) >> 1, val = dx[items.endIdx[mid]]; if (val === key) { return mid; } else if (val < key) { start = mid; } else { end = mid; } } return end; }, constructor: function (config) { this.initConfig(config); }, /** * Sets the data of the segment tree. * @param {Number} dataX * @param {Number} dataOpen * @param {Number} dataHigh * @param {Number} dataLow * @param {Number} dataClose */ setData: function (dataX, dataOpen, dataHigh, dataLow, dataClose) { if (!dataHigh) { dataClose = dataLow = dataHigh = dataOpen; } this.dataX = dataX; this.dataOpen = dataOpen; this.dataHigh = dataHigh; this.dataLow = dataLow; this.dataClose = dataClose; if (dataX.length === dataHigh.length && dataX.length === dataLow.length) { this.cache = this.aggregateData(dataX, dataOpen, dataHigh, dataLow, dataClose); } }, /** * Returns the minimum range of data that fits the given range and step size. * * @param {Number} min * @param {Number} max * @param {Number} estStep * @return {Object} The aggregation information. * @return {Number} return.start * @return {Number} return.end * @return {Object} return.data The aggregated data */ getAggregation: function (min, max, estStep) { if (!this.cache) { return null; } var minStep = Infinity, range = this.dataX[this.dataX.length - 1] - this.dataX[0], cacheMap = this.cache.map, result = cacheMap.original, name, positions, ln, step, minIdx, maxIdx; for (name in cacheMap) { positions = cacheMap[name]; ln = positions[1] - positions[0] - 1; step = range / ln; if (estStep <= step && step < minStep) { result = positions; minStep = step; } } minIdx = Math.max(this.binarySearchMin(this.cache, result[0], result[1], min), result[0]); maxIdx = Math.min(this.binarySearchMax(this.cache, result[0], result[1], max) + 1, result[1]); return { data: this.cache, start: minIdx, end: maxIdx }; }});