[5970] | 1 | #region License Information
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| 2 | /* HeuristicLab
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| 3 | * Copyright (C) 2002-2011 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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| 4 | *
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| 5 | * This file is part of HeuristicLab.
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| 6 | *
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| 7 | * HeuristicLab is free software: you can redistribute it and/or modify
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| 8 | * it under the terms of the GNU General Public License as published by
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| 9 | * the Free Software Foundation, either version 3 of the License, or
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| 10 | * (at your option) any later version.
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| 11 | *
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| 12 | * HeuristicLab is distributed in the hope that it will be useful,
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | * GNU General Public License for more details.
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| 16 | *
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| 17 | * You should have received a copy of the GNU General Public License
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| 18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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| 19 | */
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| 20 | #endregion
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| 21 |
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| 22 | using System;
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| 23 | using System.Collections.Generic;
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| 24 | using System.Drawing;
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| 25 | using System.Linq;
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| 26 | using System.Windows.Forms;
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| 27 | using System.Windows.Forms.DataVisualization.Charting;
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| 28 |
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| 29 | namespace HeuristicLab.Visualization.ChartControlsExtensions {
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| 30 | public partial class HistogramControl : UserControl {
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| 31 | private static readonly string SeriesName = "Histogram";
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| 32 |
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| 33 | private List<double> points;
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| 34 |
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| 35 | public HistogramControl() {
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| 36 | InitializeComponent();
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| 37 | points = new List<double>();
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| 38 | InitializeChart();
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| 39 | }
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| 40 |
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| 41 | public void AddPoint(double point) {
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| 42 | points.Add(point);
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| 43 | UpdateHistogram();
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| 44 | }
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| 45 |
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| 46 | public void AddPoints(IEnumerable<double> points) {
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| 47 | this.points.AddRange(points);
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| 48 | UpdateHistogram();
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| 49 | }
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| 50 |
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| 51 | public void ClearPoints() {
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| 52 | points.Clear();
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| 53 | UpdateHistogram();
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| 54 | }
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| 55 |
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| 56 | private void InitializeChart() {
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| 57 | chart.Series.Clear();
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| 58 | Series s = chart.Series.Add(SeriesName);
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| 59 | s.ChartType = SeriesChartType.Column;
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| 60 | s.BorderColor = Color.Black;
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| 61 | s.BorderWidth = 1;
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| 62 | s.BorderDashStyle = ChartDashStyle.Solid;
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| 63 | }
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| 64 |
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| 65 | private void UpdateHistogram() {
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| 66 |
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| 67 | Series histogramSeries = chart.Series[SeriesName];
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| 68 | histogramSeries.Points.Clear();
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| 69 |
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| 70 | if (!points.Any()) return;
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| 71 | int bins = (int)binsNumericUpDown.Value;
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| 72 |
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| 73 | double minValue = points.Min();
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| 74 | double maxValue = points.Max();
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| 75 | double intervalWidth = (maxValue - minValue) / bins;
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| 76 | if (intervalWidth <= 0) return;
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| 77 |
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| 78 | if (!exactCheckBox.Checked) {
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| 79 | intervalWidth = HumanRoundRange(intervalWidth);
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| 80 | minValue = Math.Floor(minValue / intervalWidth) * intervalWidth;
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| 81 | maxValue = Math.Ceiling(maxValue / intervalWidth) * intervalWidth;
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| 82 | }
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| 83 |
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| 84 | double current = minValue;
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| 85 | int count = 0;
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| 86 | foreach (double v in points.OrderBy(x => x)) {
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| 87 | if (v < current + intervalWidth) {
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| 88 | count++;
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| 89 | } else {
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| 90 | histogramSeries.Points.AddXY(current + intervalWidth / 2.0, count);
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| 91 | count = 1;
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| 92 | while (v >= current + intervalWidth) current += intervalWidth;
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| 93 | }
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| 94 | }
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| 95 | histogramSeries.Points.AddXY(current + intervalWidth / 2.0, count);
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| 96 |
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| 97 | histogramSeries["PointWidth"] = "1";
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| 98 |
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| 99 | ChartArea chartArea = chart.ChartAreas[histogramSeries.ChartArea];
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| 100 | chartArea.AxisY.Title = "Frequency";
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| 101 | chartArea.AxisX.Minimum = minValue;
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| 102 | chartArea.AxisX.Maximum = maxValue;
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| 103 |
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| 104 | double axisInterval = intervalWidth;
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| 105 | while ((maxValue - minValue) / axisInterval > 10.0) {
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| 106 | axisInterval *= 2.0;
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| 107 | }
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| 108 | chartArea.AxisX.Interval = axisInterval;
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| 109 | }
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| 110 |
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| 111 | private double HumanRoundRange(double range) {
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| 112 | double base10 = Math.Pow(10.0, Math.Floor(Math.Log10(range)));
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| 113 | double rounding = range / base10;
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| 114 | if (rounding <= 1.5) rounding = 1;
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| 115 | else if (rounding <= 2) rounding = 2;
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| 116 | else if (rounding <= 2.5) rounding = 2.5;
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| 117 | else if (rounding <= 5) rounding = 5;
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| 118 | else rounding = 10;
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| 119 | return rounding * base10;
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| 120 | }
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| 121 |
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| 122 | private void binsNumericUpDown_ValueChanged(object sender, EventArgs e) {
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| 123 | UpdateHistogram();
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| 124 | }
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| 125 |
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| 126 | private void exactCheckBox_CheckedChanged(object sender, EventArgs e) {
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| 127 | UpdateHistogram();
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| 128 | }
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| 129 | }
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| 130 | }
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