[12503] | 1 | using System;
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| 2 | using System.Collections.Generic;
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| 3 | using System.Linq;
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| 4 | using System.Text;
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| 5 | using Microsoft.Research.DynamicDataDisplay.Common.Auxiliary;
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| 6 |
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| 7 | namespace Microsoft.Research.DynamicDataDisplay.Charts
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| 8 | {
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| 9 | internal abstract class TimePeriodTicksProvider<T> : ITicksProvider<T>
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| 10 | {
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| 11 | public event EventHandler Changed;
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| 12 | protected void RaiseChanged()
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| 13 | {
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| 14 | if (Changed != null)
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| 15 | {
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| 16 | Changed(this, EventArgs.Empty);
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| 17 | }
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| 18 | }
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| 19 |
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| 20 | protected abstract T RoundUp(T time, DifferenceIn diff);
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| 21 | protected abstract T RoundDown(T time, DifferenceIn diff);
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| 22 |
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| 23 | private bool differenceInited = false;
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| 24 | private DifferenceIn difference;
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| 25 | protected DifferenceIn Difference
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| 26 | {
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| 27 | get
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| 28 | {
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| 29 | if (!differenceInited)
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| 30 | {
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| 31 | difference = GetDifferenceCore();
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| 32 | differenceInited = true;
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| 33 | }
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| 34 | return difference;
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| 35 | }
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| 36 | }
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| 37 | protected abstract DifferenceIn GetDifferenceCore();
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| 38 |
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| 39 | private int[] tickCounts = null;
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| 40 | protected int[] TickCounts
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| 41 | {
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| 42 | get
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| 43 | {
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| 44 | if (tickCounts == null)
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| 45 | tickCounts = GetTickCountsCore();
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| 46 | return tickCounts;
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| 47 | }
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| 48 | }
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| 49 | protected abstract int[] GetTickCountsCore();
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| 50 |
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| 51 | public int DecreaseTickCount(int ticksCount)
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| 52 | {
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| 53 | if (ticksCount > TickCounts[0]) return TickCounts[0];
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| 54 |
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| 55 | for (int i = 0; i < TickCounts.Length; i++)
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| 56 | if (ticksCount > TickCounts[i])
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| 57 | return TickCounts[i];
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| 58 |
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| 59 | return TickCounts.Last();
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| 60 | }
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| 61 |
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| 62 | public int IncreaseTickCount(int ticksCount)
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| 63 | {
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| 64 | if (ticksCount >= TickCounts[0]) return TickCounts[0];
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| 65 |
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| 66 | for (int i = TickCounts.Length - 1; i >= 0; i--)
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| 67 | if (ticksCount < TickCounts[i])
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| 68 | return TickCounts[i];
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| 69 |
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| 70 | return TickCounts.Last();
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| 71 | }
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| 72 |
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| 73 | protected abstract int GetSpecificValue(T start, T dt);
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| 74 | protected abstract T GetStart(T start, int value, int step);
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| 75 | protected abstract bool IsMinDate(T dt);
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| 76 | protected abstract T AddStep(T dt, int step);
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| 77 |
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| 78 | public ITicksInfo<T> GetTicks(Range<T> range, int ticksCount)
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| 79 | {
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| 80 | T start = range.Min;
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| 81 | T end = range.Max;
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| 82 | DifferenceIn diff = Difference;
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| 83 | start = RoundDown(start, end);
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| 84 | end = RoundUp(start, end);
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| 85 |
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| 86 | RoundingInfo bounds = RoundingHelper.CreateRoundedRange(
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| 87 | GetSpecificValue(start, start),
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| 88 | GetSpecificValue(start, end));
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| 89 |
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| 90 | int delta = (int)(bounds.Max - bounds.Min);
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| 91 | if (delta == 0)
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| 92 | return new TicksInfo<T> { Ticks = new T[] { start } };
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| 93 |
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| 94 | int step = delta / ticksCount;
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| 95 |
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| 96 | if (step == 0) step = 1;
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| 97 |
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| 98 | T tick = GetStart(start, (int)bounds.Min, step);
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| 99 | bool isMinDateTime = IsMinDate(tick) && step != 1;
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| 100 | if (isMinDateTime)
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| 101 | step--;
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| 102 |
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| 103 | List<T> ticks = new List<T>();
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| 104 | T finishTick = AddStep(range.Max, step);
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| 105 | while (Continue(tick, finishTick))
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| 106 | {
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| 107 | ticks.Add(tick);
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| 108 | tick = AddStep(tick, step);
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| 109 | if (isMinDateTime)
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| 110 | {
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| 111 | isMinDateTime = false;
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| 112 | step++;
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| 113 | }
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| 114 | }
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| 115 |
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| 116 | ticks = Trim(ticks, range);
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| 117 |
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| 118 | TicksInfo<T> res = new TicksInfo<T> { Ticks = ticks.ToArray(), Info = diff };
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| 119 | return res;
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| 120 | }
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| 121 |
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| 122 | protected abstract bool Continue(T current, T end);
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| 123 |
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| 124 | protected abstract T RoundUp(T start, T end);
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| 125 |
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| 126 | protected abstract T RoundDown(T start, T end);
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| 127 |
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| 128 | protected abstract List<T> Trim(List<T> ticks, Range<T> range);
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| 129 |
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| 130 | public ITicksProvider<T> MinorProvider
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| 131 | {
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| 132 | get { throw new NotSupportedException(); }
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| 133 | }
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| 134 |
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| 135 | public ITicksProvider<T> MajorProvider
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| 136 | {
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| 137 | get { throw new NotSupportedException(); }
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| 138 | }
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| 139 | }
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| 140 |
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| 141 | internal abstract class DatePeriodTicksProvider : TimePeriodTicksProvider<DateTime>
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| 142 | {
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| 143 | protected sealed override bool Continue(DateTime current, DateTime end)
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| 144 | {
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| 145 | return current < end;
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| 146 | }
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| 147 |
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| 148 | protected sealed override List<DateTime> Trim(List<DateTime> ticks, Range<DateTime> range)
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| 149 | {
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| 150 | int startIndex = 0;
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| 151 | for (int i = 0; i < ticks.Count - 1; i++)
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| 152 | {
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| 153 | if (ticks[i] <= range.Min && range.Min <= ticks[i + 1])
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| 154 | {
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| 155 | startIndex = i;
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| 156 | break;
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| 157 | }
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| 158 | }
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| 159 |
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| 160 | int endIndex = ticks.Count - 1;
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| 161 | for (int i = ticks.Count - 1; i >= 1; i--)
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| 162 | {
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| 163 | if (ticks[i] >= range.Max && range.Max > ticks[i - 1])
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| 164 | {
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| 165 | endIndex = i;
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| 166 | break;
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| 167 | }
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| 168 | }
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| 169 |
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| 170 | List<DateTime> res = new List<DateTime>(endIndex - startIndex + 1);
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| 171 | for (int i = startIndex; i <= endIndex; i++)
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| 172 | {
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| 173 | res.Add(ticks[i]);
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| 174 | }
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| 175 |
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| 176 | return res;
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| 177 | }
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| 178 |
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| 179 | protected sealed override DateTime RoundUp(DateTime start, DateTime end)
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| 180 | {
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| 181 | bool isPositive = (end - start).Ticks > 0;
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| 182 | return isPositive ? SafelyRoundUp(end) : RoundDown(end, Difference);
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| 183 | }
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| 184 |
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| 185 | private DateTime SafelyRoundUp(DateTime dt)
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| 186 | {
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| 187 | if (AddStep(dt, 1) == DateTime.MaxValue)
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| 188 | return DateTime.MaxValue;
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| 189 |
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| 190 | return RoundUp(dt, Difference);
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| 191 | }
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| 192 |
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| 193 | protected sealed override DateTime RoundDown(DateTime start, DateTime end)
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| 194 | {
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| 195 | bool isPositive = (end - start).Ticks > 0;
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| 196 | return isPositive ? RoundDown(start, Difference) : SafelyRoundUp(start);
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| 197 | }
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| 198 |
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| 199 | protected sealed override DateTime RoundDown(DateTime time, DifferenceIn diff)
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| 200 | {
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| 201 | DateTime res = time;
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| 202 |
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| 203 | switch (diff)
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| 204 | {
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| 205 | case DifferenceIn.Year:
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| 206 | res = new DateTime(time.Year, 1, 1);
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| 207 | break;
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| 208 | case DifferenceIn.Month:
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| 209 | res = new DateTime(time.Year, time.Month, 1);
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| 210 | break;
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| 211 | case DifferenceIn.Day:
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| 212 | res = time.Date;
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| 213 | break;
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| 214 | case DifferenceIn.Hour:
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| 215 | res = time.Date.AddHours(time.Hour);
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| 216 | break;
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| 217 | case DifferenceIn.Minute:
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| 218 | res = time.Date.AddHours(time.Hour).AddMinutes(time.Minute);
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| 219 | break;
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| 220 | case DifferenceIn.Second:
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| 221 | res = time.Date.AddHours(time.Hour).AddMinutes(time.Minute).AddSeconds(time.Second);
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| 222 | break;
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| 223 | case DifferenceIn.Millisecond:
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| 224 | res = time.Date.AddHours(time.Hour).AddMinutes(time.Minute).AddSeconds(time.Second).AddMilliseconds(time.Millisecond);
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| 225 | break;
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| 226 | default:
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| 227 | break;
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| 228 | }
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| 229 |
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| 230 | DebugVerify.Is(res <= time);
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| 231 |
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| 232 | return res;
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| 233 | }
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| 234 |
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| 235 | protected override DateTime RoundUp(DateTime dateTime, DifferenceIn diff)
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| 236 | {
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| 237 | DateTime res = RoundDown(dateTime, diff);
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| 238 |
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| 239 | switch (diff)
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| 240 | {
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| 241 | case DifferenceIn.Year:
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| 242 | res = res.AddYears(1);
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| 243 | break;
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| 244 | case DifferenceIn.Month:
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| 245 | res = res.AddMonths(1);
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| 246 | break;
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| 247 | case DifferenceIn.Day:
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| 248 | res = res.AddDays(1);
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| 249 | break;
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| 250 | case DifferenceIn.Hour:
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| 251 | res = res.AddHours(1);
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| 252 | break;
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| 253 | case DifferenceIn.Minute:
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| 254 | res = res.AddMinutes(1);
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| 255 | break;
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| 256 | case DifferenceIn.Second:
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| 257 | res = res.AddSeconds(1);
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| 258 | break;
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| 259 | case DifferenceIn.Millisecond:
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| 260 | res = res.AddMilliseconds(1);
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| 261 | break;
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| 262 | default:
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| 263 | break;
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| 264 | }
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| 265 |
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| 266 | return res;
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| 267 | }
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| 268 | }
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| 269 | }
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