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source: branches/2701_MemPRAlgorithm/HeuristicLab.Analysis.Views/3.3/DataTableControl.cs @ 17597

Last change on this file since 17597 was 14562, checked in by abeham, 8 years ago

#2701: Updated branch to trunk
File size: 31.0 KB
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1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2016 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
4 *
5 * This file is part of HeuristicLab.
6 *
7 * HeuristicLab is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
11 *
12 * HeuristicLab is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
19 */
20#endregion
21
22using System;
23using System.Collections.Generic;
24using System.Drawing;
25using System.Linq;
26using System.Windows.Forms;
27using System.Windows.Forms.DataVisualization.Charting;
28using HeuristicLab.Collections;
29using HeuristicLab.MainForm.WindowsForms;
30
31namespace HeuristicLab.Analysis.Views {
32  public partial class DataTableControl : AsynchronousContentView {
33    protected List<Series> invisibleSeries;
34    protected Dictionary<IObservableList<double>, DataRow> valuesRowsTable;
35
36    public new DataTable Content {
37      get { return (DataTable)base.Content; }
38      set { base.Content = value; }
39    }
40
41    public DataTableControl() {
42      InitializeComponent();
43      valuesRowsTable = new Dictionary<IObservableList<double>, DataRow>();
44      invisibleSeries = new List<Series>();
45      chart.CustomizeAllChartAreas();
46      chart.ChartAreas[0].CursorX.Interval = 1;
47      chart.ContextMenuStrip.Items.Add(configureToolStripMenuItem);
48    }
49
50    #region Event Handler Registration
51    protected override void DeregisterContentEvents() {
52      foreach (DataRow row in Content.Rows)
53        DeregisterDataRowEvents(row);
54      Content.VisualPropertiesChanged -= new EventHandler(Content_VisualPropertiesChanged);
55      Content.Rows.ItemsAdded -= new CollectionItemsChangedEventHandler<DataRow>(Rows_ItemsAdded);
56      Content.Rows.ItemsRemoved -= new CollectionItemsChangedEventHandler<DataRow>(Rows_ItemsRemoved);
57      Content.Rows.ItemsReplaced -= new CollectionItemsChangedEventHandler<DataRow>(Rows_ItemsReplaced);
58      Content.Rows.CollectionReset -= new CollectionItemsChangedEventHandler<DataRow>(Rows_CollectionReset);
59    }
60    protected override void RegisterContentEvents() {
61      Content.VisualPropertiesChanged += new EventHandler(Content_VisualPropertiesChanged);
62      Content.Rows.ItemsAdded += new CollectionItemsChangedEventHandler<DataRow>(Rows_ItemsAdded);
63      Content.Rows.ItemsRemoved += new CollectionItemsChangedEventHandler<DataRow>(Rows_ItemsRemoved);
64      Content.Rows.ItemsReplaced += new CollectionItemsChangedEventHandler<DataRow>(Rows_ItemsReplaced);
65      Content.Rows.CollectionReset += new CollectionItemsChangedEventHandler<DataRow>(Rows_CollectionReset);
66    }
67
68    protected virtual void RegisterDataRowEvents(DataRow row) {
69      row.NameChanged += new EventHandler(Row_NameChanged);
70      row.VisualPropertiesChanged += new EventHandler(Row_VisualPropertiesChanged);
71      valuesRowsTable.Add(row.Values, row);
72      row.Values.ItemsAdded += new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_ItemsAdded);
73      row.Values.ItemsRemoved += new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_ItemsRemoved);
74      row.Values.ItemsReplaced += new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_ItemsReplaced);
75      row.Values.ItemsMoved += new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_ItemsMoved);
76      row.Values.CollectionReset += new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_CollectionReset);
77    }
78    protected virtual void DeregisterDataRowEvents(DataRow row) {
79      row.Values.ItemsAdded -= new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_ItemsAdded);
80      row.Values.ItemsRemoved -= new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_ItemsRemoved);
81      row.Values.ItemsReplaced -= new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_ItemsReplaced);
82      row.Values.ItemsMoved -= new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_ItemsMoved);
83      row.Values.CollectionReset -= new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_CollectionReset);
84      valuesRowsTable.Remove(row.Values);
85      row.VisualPropertiesChanged -= new EventHandler(Row_VisualPropertiesChanged);
86      row.NameChanged -= new EventHandler(Row_NameChanged);
87    }
88    #endregion
89
90    protected override void OnContentChanged() {
91      invisibleSeries.Clear();
92      chart.Titles[0].Text = string.Empty;
93      chart.ChartAreas[0].AxisX.Title = string.Empty;
94      chart.ChartAreas[0].AxisY.Title = string.Empty;
95      chart.ChartAreas[0].AxisY2.Title = string.Empty;
96      chart.Series.Clear();
97      if (Content != null) {
98        chart.Titles[0].Text = Content.Name;
99        chart.Titles[0].Visible = !string.IsNullOrEmpty(Content.Name);
100        AddDataRows(Content.Rows);
101        ConfigureChartArea(chart.ChartAreas[0]);
102        RecalculateAxesScale(chart.ChartAreas[0]);
103      }
104    }
105
106    protected override void SetEnabledStateOfControls() {
107      chart.Enabled = Content != null;
108    }
109
110    public void ShowConfiguration() {
111      if (Content != null) {
112        using (var dialog = new DataTableVisualPropertiesDialog(Content)) {
113          dialog.ShowDialog(this);
114        }
115      } else MessageBox.Show("Nothing to configure.");
116    }
117    protected virtual void AddDataRows(IEnumerable<DataRow> rows) {
118      foreach (var row in rows) {
119        RegisterDataRowEvents(row);
120        var series = new Series(row.Name);
121        if (row.VisualProperties.DisplayName.Trim() != String.Empty) series.LegendText = row.VisualProperties.DisplayName;
122        else series.LegendText = row.Name;
123        ConfigureSeries(series, row);
124        FillSeriesWithRowValues(series, row);
125        chart.Series.Add(series);
126      }
127      ConfigureChartArea(chart.ChartAreas[0]);
128      RecalculateAxesScale(chart.ChartAreas[0]);
129      UpdateYCursorInterval();
130    }
131
132    protected virtual void RemoveDataRows(IEnumerable<DataRow> rows) {
133      foreach (var row in rows) {
134        DeregisterDataRowEvents(row);
135        Series series = chart.Series[row.Name];
136        chart.Series.Remove(series);
137        if (invisibleSeries.Contains(series))
138          invisibleSeries.Remove(series);
139      }
140      RecalculateAxesScale(chart.ChartAreas[0]);
141    }
142
143    private void ConfigureSeries(Series series, DataRow row) {
144      RemoveCustomPropertyIfExists(series, "PointWidth");
145      series.BorderWidth = 1;
146      series.BorderDashStyle = ChartDashStyle.Solid;
147      series.BorderColor = Color.Empty;
148
149      if (row.VisualProperties.Color != Color.Empty)
150        series.Color = row.VisualProperties.Color;
151      else series.Color = Color.Empty;
152      series.IsVisibleInLegend = row.VisualProperties.IsVisibleInLegend;
153
154      switch (row.VisualProperties.ChartType) {
155        case DataRowVisualProperties.DataRowChartType.Line:
156          series.ChartType = SeriesChartType.FastLine;
157          series.BorderWidth = row.VisualProperties.LineWidth;
158          series.BorderDashStyle = ConvertLineStyle(row.VisualProperties.LineStyle);
159          break;
160        case DataRowVisualProperties.DataRowChartType.Bars:
161          // Bar is incompatible with anything but Bar and StackedBar*
162          if (!chart.Series.Any(x => x.ChartType != SeriesChartType.Bar && x.ChartType != SeriesChartType.StackedBar && x.ChartType != SeriesChartType.StackedBar100))
163            series.ChartType = SeriesChartType.Bar;
164          else {
165            series.ChartType = SeriesChartType.FastPoint; //default
166            row.VisualProperties.ChartType = DataRowVisualProperties.DataRowChartType.Points;
167          }
168          break;
169        case DataRowVisualProperties.DataRowChartType.Columns:
170          series.ChartType = SeriesChartType.Column;
171          break;
172        case DataRowVisualProperties.DataRowChartType.Points:
173          series.ChartType = SeriesChartType.FastPoint;
174          break;
175        case DataRowVisualProperties.DataRowChartType.Histogram:
176          series.ChartType = SeriesChartType.StackedColumn;
177          series.SetCustomProperty("PointWidth", "1");
178          if (!series.Color.IsEmpty && series.Color.GetBrightness() < 0.25)
179            series.BorderColor = Color.White;
180          else series.BorderColor = Color.Black;
181          break;
182        case DataRowVisualProperties.DataRowChartType.StepLine:
183          series.ChartType = SeriesChartType.StepLine;
184          series.BorderWidth = row.VisualProperties.LineWidth;
185          series.BorderDashStyle = ConvertLineStyle(row.VisualProperties.LineStyle);
186          break;
187        default:
188          series.ChartType = SeriesChartType.FastPoint;
189          break;
190      }
191      series.YAxisType = row.VisualProperties.SecondYAxis ? AxisType.Secondary : AxisType.Primary;
192      series.XAxisType = row.VisualProperties.SecondXAxis ? AxisType.Secondary : AxisType.Primary;
193      if (row.VisualProperties.DisplayName.Trim() != String.Empty) series.LegendText = row.VisualProperties.DisplayName;
194      else series.LegendText = row.Name;
195
196      string xAxisTitle = string.IsNullOrEmpty(Content.VisualProperties.XAxisTitle)
197                      ? "X"
198                      : Content.VisualProperties.XAxisTitle;
199      string yAxisTitle = string.IsNullOrEmpty(Content.VisualProperties.YAxisTitle)
200                            ? "Y"
201                            : Content.VisualProperties.YAxisTitle;
202      series.ToolTip =
203        series.LegendText + Environment.NewLine +
204        xAxisTitle + " = " + "#INDEX," + Environment.NewLine +
205        yAxisTitle + " = " + "#VAL";
206    }
207
208    private void ConfigureChartArea(ChartArea area) {
209      if (Content.VisualProperties.TitleFont != null) chart.Titles[0].Font = Content.VisualProperties.TitleFont;
210      if (!Content.VisualProperties.TitleColor.IsEmpty) chart.Titles[0].ForeColor = Content.VisualProperties.TitleColor;
211      chart.Titles[0].Text = Content.VisualProperties.Title;
212      chart.Titles[0].Visible = !string.IsNullOrEmpty(Content.VisualProperties.Title);
213
214      if (Content.VisualProperties.AxisTitleFont != null) area.AxisX.TitleFont = Content.VisualProperties.AxisTitleFont;
215      if (!Content.VisualProperties.AxisTitleColor.IsEmpty) area.AxisX.TitleForeColor = Content.VisualProperties.AxisTitleColor;
216      area.AxisX.Title = Content.VisualProperties.XAxisTitle;
217
218      if (Content.VisualProperties.AxisTitleFont != null) area.AxisX2.TitleFont = Content.VisualProperties.AxisTitleFont;
219      if (!Content.VisualProperties.AxisTitleColor.IsEmpty) area.AxisX2.TitleForeColor = Content.VisualProperties.AxisTitleColor;
220      area.AxisX2.Title = Content.VisualProperties.SecondXAxisTitle;
221
222      if (Content.VisualProperties.AxisTitleFont != null) area.AxisY.TitleFont = Content.VisualProperties.AxisTitleFont;
223      if (!Content.VisualProperties.AxisTitleColor.IsEmpty) area.AxisY.TitleForeColor = Content.VisualProperties.AxisTitleColor;
224      area.AxisY.Title = Content.VisualProperties.YAxisTitle;
225
226      if (Content.VisualProperties.AxisTitleFont != null) area.AxisY2.TitleFont = Content.VisualProperties.AxisTitleFont;
227      if (!Content.VisualProperties.AxisTitleColor.IsEmpty) area.AxisY2.TitleForeColor = Content.VisualProperties.AxisTitleColor;
228      area.AxisY2.Title = Content.VisualProperties.SecondYAxisTitle;
229
230      area.AxisX.IsLogarithmic = Content.VisualProperties.XAxisLogScale;
231      area.AxisX2.IsLogarithmic = Content.VisualProperties.SecondXAxisLogScale;
232      area.AxisY.IsLogarithmic = Content.VisualProperties.YAxisLogScale;
233      area.AxisY2.IsLogarithmic = Content.VisualProperties.SecondYAxisLogScale;
234    }
235
236    private void RecalculateAxesScale(ChartArea area) {
237      // Reset the axes bounds so that RecalculateAxesScale() will assign new bounds
238      foreach (Axis a in area.Axes) {
239        a.Minimum = double.NaN;
240        a.Maximum = double.NaN;
241      }
242      area.RecalculateAxesScale();
243      area.AxisX.IsMarginVisible = false;
244      area.AxisX2.IsMarginVisible = false;
245
246      if (!Content.VisualProperties.XAxisMinimumAuto && !double.IsNaN(Content.VisualProperties.XAxisMinimumFixedValue)) area.AxisX.Minimum = Content.VisualProperties.XAxisMinimumFixedValue;
247      if (!Content.VisualProperties.XAxisMaximumAuto && !double.IsNaN(Content.VisualProperties.XAxisMaximumFixedValue)) area.AxisX.Maximum = Content.VisualProperties.XAxisMaximumFixedValue;
248      if (!Content.VisualProperties.SecondXAxisMinimumAuto && !double.IsNaN(Content.VisualProperties.SecondXAxisMinimumFixedValue)) area.AxisX2.Minimum = Content.VisualProperties.SecondXAxisMinimumFixedValue;
249      if (!Content.VisualProperties.SecondXAxisMaximumAuto && !double.IsNaN(Content.VisualProperties.SecondXAxisMaximumFixedValue)) area.AxisX2.Maximum = Content.VisualProperties.SecondXAxisMaximumFixedValue;
250      if (!Content.VisualProperties.YAxisMinimumAuto && !double.IsNaN(Content.VisualProperties.YAxisMinimumFixedValue)) area.AxisY.Minimum = Content.VisualProperties.YAxisMinimumFixedValue;
251      if (!Content.VisualProperties.YAxisMaximumAuto && !double.IsNaN(Content.VisualProperties.YAxisMaximumFixedValue)) area.AxisY.Maximum = Content.VisualProperties.YAxisMaximumFixedValue;
252      if (!Content.VisualProperties.SecondYAxisMinimumAuto && !double.IsNaN(Content.VisualProperties.SecondYAxisMinimumFixedValue)) area.AxisY2.Minimum = Content.VisualProperties.SecondYAxisMinimumFixedValue;
253      if (!Content.VisualProperties.SecondYAxisMaximumAuto && !double.IsNaN(Content.VisualProperties.SecondYAxisMaximumFixedValue)) area.AxisY2.Maximum = Content.VisualProperties.SecondYAxisMaximumFixedValue;
254      if (area.AxisX.Minimum >= area.AxisX.Maximum) area.AxisX.Maximum = area.AxisX.Minimum + 1;
255      if (area.AxisX2.Minimum >= area.AxisX2.Maximum) area.AxisX2.Maximum = area.AxisX2.Minimum + 1;
256      if (area.AxisY.Minimum >= area.AxisY.Maximum) area.AxisY.Maximum = area.AxisY.Minimum + 1;
257      if (area.AxisY2.Minimum >= area.AxisY2.Maximum) area.AxisY2.Maximum = area.AxisY2.Minimum + 1;
258    }
259
260    protected virtual void UpdateYCursorInterval() {
261      double interestingValuesRange = (
262        from series in chart.Series
263        where series.Enabled
264        let values = (from point in series.Points
265                      where !point.IsEmpty
266                      select point.YValues[0]).DefaultIfEmpty(1.0)
267        let range = values.Max() - values.Min()
268        where range > 0.0
269        select range
270        ).DefaultIfEmpty(1.0).Min();
271
272      double digits = (int)Math.Log10(interestingValuesRange) - 3;
273      double yZoomInterval = Math.Pow(10, digits);
274      this.chart.ChartAreas[0].CursorY.Interval = yZoomInterval;
275    }
276
277    #region Event Handlers
278    #region Content Event Handlers
279    private void Content_VisualPropertiesChanged(object sender, EventArgs e) {
280      if (InvokeRequired)
281        Invoke(new EventHandler(Content_VisualPropertiesChanged), sender, e);
282      else {
283        ConfigureChartArea(chart.ChartAreas[0]);
284        RecalculateAxesScale(chart.ChartAreas[0]); // axes min/max could have changed
285      }
286    }
287    #endregion
288    #region Rows Event Handlers
289    private void Rows_ItemsAdded(object sender, CollectionItemsChangedEventArgs<DataRow> e) {
290      if (InvokeRequired)
291        Invoke(new CollectionItemsChangedEventHandler<DataRow>(Rows_ItemsAdded), sender, e);
292      else {
293        AddDataRows(e.Items);
294      }
295    }
296    private void Rows_ItemsRemoved(object sender, CollectionItemsChangedEventArgs<DataRow> e) {
297      if (InvokeRequired)
298        Invoke(new CollectionItemsChangedEventHandler<DataRow>(Rows_ItemsRemoved), sender, e);
299      else {
300        RemoveDataRows(e.Items);
301      }
302    }
303    private void Rows_ItemsReplaced(object sender, CollectionItemsChangedEventArgs<DataRow> e) {
304      if (InvokeRequired)
305        Invoke(new CollectionItemsChangedEventHandler<DataRow>(Rows_ItemsReplaced), sender, e);
306      else {
307        RemoveDataRows(e.OldItems);
308        AddDataRows(e.Items);
309      }
310    }
311    private void Rows_CollectionReset(object sender, CollectionItemsChangedEventArgs<DataRow> e) {
312      if (InvokeRequired)
313        Invoke(new CollectionItemsChangedEventHandler<DataRow>(Rows_CollectionReset), sender, e);
314      else {
315        RemoveDataRows(e.OldItems);
316        AddDataRows(e.Items);
317      }
318    }
319    #endregion
320    #region Row Event Handlers
321    private void Row_VisualPropertiesChanged(object sender, EventArgs e) {
322      if (InvokeRequired)
323        Invoke(new EventHandler(Row_VisualPropertiesChanged), sender, e);
324      else {
325        DataRow row = (DataRow)sender;
326        Series series = chart.Series[row.Name];
327        series.Points.Clear();
328        ConfigureSeries(series, row);
329        FillSeriesWithRowValues(series, row);
330        RecalculateAxesScale(chart.ChartAreas[0]);
331      }
332    }
333    private void Row_NameChanged(object sender, EventArgs e) {
334      if (InvokeRequired)
335        Invoke(new EventHandler(Row_NameChanged), sender, e);
336      else {
337        DataRow row = (DataRow)sender;
338        chart.Series[row.Name].Name = row.Name;
339      }
340    }
341    #endregion
342    #region Values Event Handlers
343    private void Values_ItemsAdded(object sender, CollectionItemsChangedEventArgs<IndexedItem<double>> e) {
344      if (InvokeRequired)
345        Invoke(new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_ItemsAdded), sender, e);
346      else {
347        DataRow row = null;
348        valuesRowsTable.TryGetValue((IObservableList<double>)sender, out row);
349        if (row != null) {
350          Series rowSeries = chart.Series[row.Name];
351          if (!invisibleSeries.Contains(rowSeries)) {
352            rowSeries.Points.Clear();
353            FillSeriesWithRowValues(rowSeries, row);
354            RecalculateAxesScale(chart.ChartAreas[0]);
355            UpdateYCursorInterval();
356          }
357        }
358      }
359    }
360    private void Values_ItemsRemoved(object sender, CollectionItemsChangedEventArgs<IndexedItem<double>> e) {
361      if (InvokeRequired)
362        Invoke(new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_ItemsRemoved), sender, e);
363      else {
364        DataRow row = null;
365        valuesRowsTable.TryGetValue((IObservableList<double>)sender, out row);
366        if (row != null) {
367          Series rowSeries = chart.Series[row.Name];
368          if (!invisibleSeries.Contains(rowSeries)) {
369            rowSeries.Points.Clear();
370            FillSeriesWithRowValues(rowSeries, row);
371            RecalculateAxesScale(chart.ChartAreas[0]);
372            UpdateYCursorInterval();
373          }
374        }
375      }
376    }
377    private void Values_ItemsReplaced(object sender, CollectionItemsChangedEventArgs<IndexedItem<double>> e) {
378      if (InvokeRequired)
379        Invoke(new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_ItemsReplaced), sender, e);
380      else {
381        DataRow row = null;
382        valuesRowsTable.TryGetValue((IObservableList<double>)sender, out row);
383        if (row != null) {
384          Series rowSeries = chart.Series[row.Name];
385          if (!invisibleSeries.Contains(rowSeries)) {
386            if (row.VisualProperties.ChartType == DataRowVisualProperties.DataRowChartType.Histogram) {
387              rowSeries.Points.Clear();
388              FillSeriesWithRowValues(rowSeries, row);
389            } else {
390              foreach (IndexedItem<double> item in e.Items) {
391                if (IsInvalidValue(item.Value))
392                  rowSeries.Points[item.Index].IsEmpty = true;
393                else {
394                  rowSeries.Points[item.Index].YValues = new double[] { item.Value };
395                  rowSeries.Points[item.Index].IsEmpty = false;
396                }
397              }
398            }
399            RecalculateAxesScale(chart.ChartAreas[0]);
400            UpdateYCursorInterval();
401          }
402        }
403      }
404    }
405    private void Values_ItemsMoved(object sender, CollectionItemsChangedEventArgs<IndexedItem<double>> e) {
406      if (InvokeRequired)
407        Invoke(new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_ItemsMoved), sender, e);
408      else {
409        DataRow row = null;
410        valuesRowsTable.TryGetValue((IObservableList<double>)sender, out row);
411        if (row != null) {
412          Series rowSeries = chart.Series[row.Name];
413          if (!invisibleSeries.Contains(rowSeries)) {
414            rowSeries.Points.Clear();
415            FillSeriesWithRowValues(rowSeries, row);
416            RecalculateAxesScale(chart.ChartAreas[0]);
417            UpdateYCursorInterval();
418          }
419        }
420      }
421    }
422
423    private void Values_CollectionReset(object sender, CollectionItemsChangedEventArgs<IndexedItem<double>> e) {
424      if (InvokeRequired)
425        Invoke(new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_CollectionReset), sender, e);
426      else {
427        DataRow row = null;
428        valuesRowsTable.TryGetValue((IObservableList<double>)sender, out row);
429        if (row != null) {
430          Series rowSeries = chart.Series[row.Name];
431          if (!invisibleSeries.Contains(rowSeries)) {
432            rowSeries.Points.Clear();
433            FillSeriesWithRowValues(rowSeries, row);
434            RecalculateAxesScale(chart.ChartAreas[0]);
435            UpdateYCursorInterval();
436          }
437        }
438      }
439    }
440    #endregion
441    private void configureToolStripMenuItem_Click(object sender, EventArgs e) {
442      ShowConfiguration();
443    }
444    #endregion
445
446    #region Chart Event Handlers
447    private void chart_MouseDown(object sender, MouseEventArgs e) {
448      HitTestResult result = chart.HitTest(e.X, e.Y);
449      if (result.ChartElementType == ChartElementType.LegendItem) {
450        ToggleSeriesVisible(result.Series);
451      }
452    }
453    private void chart_MouseMove(object sender, MouseEventArgs e) {
454      HitTestResult result = chart.HitTest(e.X, e.Y);
455      if (result.ChartElementType == ChartElementType.LegendItem)
456        this.Cursor = Cursors.Hand;
457      else
458        this.Cursor = Cursors.Default;
459    }
460    private void chart_CustomizeLegend(object sender, CustomizeLegendEventArgs e) {
461      foreach (LegendItem legendItem in e.LegendItems) {
462        var series = chart.Series[legendItem.SeriesName];
463        if (series != null) {
464          bool seriesIsInvisible = invisibleSeries.Contains(series);
465          foreach (LegendCell cell in legendItem.Cells) {
466            cell.ForeColor = seriesIsInvisible ? Color.Gray : Color.Black;
467          }
468        }
469      }
470    }
471    #endregion
472
473    private void ToggleSeriesVisible(Series series) {
474      if (!invisibleSeries.Contains(series)) {
475        series.Points.Clear();
476        invisibleSeries.Add(series);
477      } else {
478        invisibleSeries.Remove(series);
479        if (Content != null) {
480
481          var row = (from r in Content.Rows
482                     where r.Name == series.Name
483                     select r).Single();
484          FillSeriesWithRowValues(series, row);
485          this.chart.Legends[series.Legend].ForeColor = Color.Black;
486          RecalculateAxesScale(chart.ChartAreas[0]);
487          UpdateYCursorInterval();
488        }
489      }
490    }
491
492    private void FillSeriesWithRowValues(Series series, DataRow row) {
493      switch (row.VisualProperties.ChartType) {
494        case DataRowVisualProperties.DataRowChartType.Histogram:
495          // when a single histogram is updated, all histograms must be updated. otherwise the value ranges and bin sizes may not be equal.
496          var histograms = Content.Rows
497            .Where(r => r.VisualProperties.ChartType == DataRowVisualProperties.DataRowChartType.Histogram)
498            .ToList();
499          CalculateHistogram(series, row, histograms);
500          foreach (var h in from r in histograms
501                            where r != row
502                            let s = chart.Series.FindByName(r.Name)
503                            where s != null
504                            where !invisibleSeries.Contains(s)
505                            select new { row = r, series = s }) {
506            h.series.Points.Clear();
507            CalculateHistogram(h.series, h.row, histograms);
508          }
509          break;
510        default: {
511            bool yLogarithmic = series.YAxisType == AxisType.Primary
512                                  ? Content.VisualProperties.YAxisLogScale
513                                  : Content.VisualProperties.SecondYAxisLogScale;
514            bool xLogarithmic = series.XAxisType == AxisType.Primary
515                                  ? Content.VisualProperties.XAxisLogScale
516                                  : Content.VisualProperties.SecondXAxisLogScale;
517            for (int i = 0; i < row.Values.Count; i++) {
518              var value = row.Values[i];
519              var point = new DataPoint();
520              point.XValue = row.VisualProperties.StartIndexZero && !xLogarithmic ? i : i + 1;
521              if (IsInvalidValue(value) || (yLogarithmic && value <= 0))
522                point.IsEmpty = true;
523              else
524                point.YValues = new double[] { value };
525              series.Points.Add(point);
526            }
527          }
528          break;
529      }
530    }
531
532    protected virtual void CalculateHistogram(Series series, DataRow row, IEnumerable<DataRow> histogramRows) {
533      series.Points.Clear();
534      if (!row.Values.Any()) return;
535
536      var validValues = histogramRows.SelectMany(r => r.Values).Where(x => !IsInvalidValue(x)).ToList();
537      if (!validValues.Any()) return;
538
539      int bins = histogramRows.Max(r => r.VisualProperties.Bins);
540      decimal minValue = (decimal)validValues.Min();
541      decimal maxValue = (decimal)validValues.Max();
542      decimal intervalWidth = (maxValue - minValue) / bins;
543      if (intervalWidth < 0) return;
544      if (intervalWidth == 0) {
545        series.Points.AddXY(minValue, row.Values.Count);
546        return;
547      }
548
549      if (!histogramRows.Any(r => r.VisualProperties.ExactBins)) {
550        intervalWidth = (decimal)HumanRoundRange((double)intervalWidth);
551        minValue = Math.Floor(minValue / intervalWidth) * intervalWidth;
552        maxValue = Math.Ceiling(maxValue / intervalWidth) * intervalWidth;
553      }
554
555      decimal intervalCenter = intervalWidth / 2;
556
557      decimal min = 0.0m, max = 0.0m;
558      if (!Double.IsNaN(Content.VisualProperties.XAxisMinimumFixedValue) && !Content.VisualProperties.XAxisMinimumAuto)
559        min = (decimal)Content.VisualProperties.XAxisMinimumFixedValue;
560      else min = minValue;
561      if (!Double.IsNaN(Content.VisualProperties.XAxisMaximumFixedValue) && !Content.VisualProperties.XAxisMaximumAuto)
562        max = (decimal)Content.VisualProperties.XAxisMaximumFixedValue;
563      else max = maxValue + intervalWidth;
564
565      double axisInterval = (double)intervalWidth / row.VisualProperties.ScaleFactor;
566
567      var area = chart.ChartAreas[0];
568      area.AxisX.Interval = axisInterval;
569
570      series.SetCustomProperty("PointWidth", "1"); // 0.8 is the default value
571
572      // get the range or intervals which define the grouping of the frequency values
573      var range = Range(min, max, intervalWidth).Skip(1).ToList();
574
575      // aggregate the row values by unique key and frequency value
576      var valueFrequencies = (from v in row.Values
577                              where !IsInvalidValue(v)
578                              orderby v
579                              group v by v into g
580                              select new Tuple<double, double>(g.First(), g.Count())).ToList();
581
582      // ensure that each column is displayed completely on the chart by adding two dummy datapoints on the upper and lower range
583      series.Points.Add(new DataPoint((double)(min - intervalWidth), 0));
584      series.Points.Add(new DataPoint((double)(max + intervalWidth), 0));
585
586      // add data points
587      int j = 0;
588      foreach (var d in range) {
589        double sum = 0.0;
590        // sum the frequency values that fall within the same interval
591        while (j < valueFrequencies.Count && (decimal)valueFrequencies[j].Item1 < d) {
592          sum += valueFrequencies[j].Item2;
593          ++j;
594        }
595        string xAxisTitle = string.IsNullOrEmpty(Content.VisualProperties.XAxisTitle)
596                              ? "X"
597                              : Content.VisualProperties.XAxisTitle;
598        string yAxisTitle = string.IsNullOrEmpty(Content.VisualProperties.YAxisTitle)
599                              ? "Y"
600                              : Content.VisualProperties.YAxisTitle;
601        series.Points.Add(new DataPoint((double)(d - intervalCenter), sum) {
602          ToolTip =
603            xAxisTitle + ": [" + (d - intervalWidth) + "-" + d + ")" + Environment.NewLine +
604            yAxisTitle + ": " + sum
605        });
606      }
607    }
608
609    #region Helpers
610    public static IEnumerable<decimal> Range(decimal min, decimal max, decimal step) {
611      decimal i;
612      for (i = min; i <= max; i += step)
613        yield return i;
614
615      if (i != max + step)
616        yield return i;
617    }
618
619    protected void RemoveCustomPropertyIfExists(Series series, string property) {
620      if (series.IsCustomPropertySet(property)) series.DeleteCustomProperty(property);
621    }
622
623    private double HumanRoundRange(double range) {
624      double base10 = Math.Pow(10.0, Math.Floor(Math.Log10(range)));
625      double rounding = range / base10;
626      if (rounding <= 1.5) rounding = 1;
627      else if (rounding <= 2.25) rounding = 2;
628      else if (rounding <= 3.75) rounding = 2.5;
629      else if (rounding <= 7.5) rounding = 5;
630      else rounding = 10;
631      return rounding * base10;
632    }
633
634    private double HumanRoundMax(double max) {
635      double base10;
636      if (max > 0) base10 = Math.Pow(10.0, Math.Floor(Math.Log10(max)));
637      else base10 = Math.Pow(10.0, Math.Ceiling(Math.Log10(-max)));
638      double rounding = (max > 0) ? base10 : -base10;
639      while (rounding < max) rounding += base10;
640      return rounding;
641    }
642
643    private ChartDashStyle ConvertLineStyle(DataRowVisualProperties.DataRowLineStyle dataRowLineStyle) {
644      switch (dataRowLineStyle) {
645        case DataRowVisualProperties.DataRowLineStyle.Dash:
646          return ChartDashStyle.Dash;
647        case DataRowVisualProperties.DataRowLineStyle.DashDot:
648          return ChartDashStyle.DashDot;
649        case DataRowVisualProperties.DataRowLineStyle.DashDotDot:
650          return ChartDashStyle.DashDotDot;
651        case DataRowVisualProperties.DataRowLineStyle.Dot:
652          return ChartDashStyle.Dot;
653        case DataRowVisualProperties.DataRowLineStyle.NotSet:
654          return ChartDashStyle.NotSet;
655        case DataRowVisualProperties.DataRowLineStyle.Solid:
656          return ChartDashStyle.Solid;
657        default:
658          return ChartDashStyle.NotSet;
659      }
660    }
661
662    protected static bool IsInvalidValue(double x) {
663      return double.IsNaN(x) || x < (double)decimal.MinValue || x > (double)decimal.MaxValue;
664    }
665    #endregion
666  }
667}
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