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source: trunk/sources/HeuristicLab.Analysis.Views/3.3/DataTableView.cs @ 14438

Last change on this file since 14438 was 14438, checked in by pfleck, 7 years ago

#2713 Hide the chart-title if the title is empty (to avoid unnecessary empty space)

File size: 30.4 KB
Line 
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.Core.Views;
30using HeuristicLab.MainForm;
31
32namespace HeuristicLab.Analysis.Views {
33  [View("DataTable View")]
34  [Content(typeof(DataTable), true)]
35  public partial class DataTableView : NamedItemView, IConfigureableView {
36    protected List<Series> invisibleSeries;
37    protected Dictionary<IObservableList<double>, DataRow> valuesRowsTable;
38
39    public new DataTable Content {
40      get { return (DataTable)base.Content; }
41      set { base.Content = value; }
42    }
43
44    public DataTableView() {
45      InitializeComponent();
46      valuesRowsTable = new Dictionary<IObservableList<double>, DataRow>();
47      invisibleSeries = new List<Series>();
48      chart.CustomizeAllChartAreas();
49      chart.ChartAreas[0].CursorX.Interval = 1;
50      chart.ContextMenuStrip.Items.Add(configureToolStripMenuItem);
51    }
52
53    #region Event Handler Registration
54    protected override void DeregisterContentEvents() {
55      foreach (DataRow row in Content.Rows)
56        DeregisterDataRowEvents(row);
57      Content.VisualPropertiesChanged -= new EventHandler(Content_VisualPropertiesChanged);
58      Content.Rows.ItemsAdded -= new CollectionItemsChangedEventHandler<DataRow>(Rows_ItemsAdded);
59      Content.Rows.ItemsRemoved -= new CollectionItemsChangedEventHandler<DataRow>(Rows_ItemsRemoved);
60      Content.Rows.ItemsReplaced -= new CollectionItemsChangedEventHandler<DataRow>(Rows_ItemsReplaced);
61      Content.Rows.CollectionReset -= new CollectionItemsChangedEventHandler<DataRow>(Rows_CollectionReset);
62      base.DeregisterContentEvents();
63    }
64    protected override void RegisterContentEvents() {
65      base.RegisterContentEvents();
66      Content.VisualPropertiesChanged += new EventHandler(Content_VisualPropertiesChanged);
67      Content.Rows.ItemsAdded += new CollectionItemsChangedEventHandler<DataRow>(Rows_ItemsAdded);
68      Content.Rows.ItemsRemoved += new CollectionItemsChangedEventHandler<DataRow>(Rows_ItemsRemoved);
69      Content.Rows.ItemsReplaced += new CollectionItemsChangedEventHandler<DataRow>(Rows_ItemsReplaced);
70      Content.Rows.CollectionReset += new CollectionItemsChangedEventHandler<DataRow>(Rows_CollectionReset);
71    }
72
73    protected virtual void RegisterDataRowEvents(DataRow row) {
74      row.NameChanged += new EventHandler(Row_NameChanged);
75      row.VisualPropertiesChanged += new EventHandler(Row_VisualPropertiesChanged);
76      valuesRowsTable.Add(row.Values, row);
77      row.Values.ItemsAdded += new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_ItemsAdded);
78      row.Values.ItemsRemoved += new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_ItemsRemoved);
79      row.Values.ItemsReplaced += new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_ItemsReplaced);
80      row.Values.ItemsMoved += new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_ItemsMoved);
81      row.Values.CollectionReset += new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_CollectionReset);
82    }
83    protected virtual void DeregisterDataRowEvents(DataRow row) {
84      row.Values.ItemsAdded -= new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_ItemsAdded);
85      row.Values.ItemsRemoved -= new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_ItemsRemoved);
86      row.Values.ItemsReplaced -= new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_ItemsReplaced);
87      row.Values.ItemsMoved -= new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_ItemsMoved);
88      row.Values.CollectionReset -= new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_CollectionReset);
89      valuesRowsTable.Remove(row.Values);
90      row.VisualPropertiesChanged -= new EventHandler(Row_VisualPropertiesChanged);
91      row.NameChanged -= new EventHandler(Row_NameChanged);
92    }
93    #endregion
94
95    protected override void OnContentChanged() {
96      base.OnContentChanged();
97      invisibleSeries.Clear();
98      chart.Titles[0].Text = string.Empty;
99      chart.ChartAreas[0].AxisX.Title = string.Empty;
100      chart.ChartAreas[0].AxisY.Title = string.Empty;
101      chart.ChartAreas[0].AxisY2.Title = string.Empty;
102      chart.Series.Clear();
103      if (Content != null) {
104        chart.Titles[0].Text = Content.Name;
105        chart.Titles[0].Visible = !string.IsNullOrEmpty(Content.Name);
106        AddDataRows(Content.Rows);
107        ConfigureChartArea(chart.ChartAreas[0]);
108        RecalculateAxesScale(chart.ChartAreas[0]);
109      }
110    }
111
112    protected override void SetEnabledStateOfControls() {
113      base.SetEnabledStateOfControls();
114      chart.Enabled = Content != null;
115    }
116
117    public void ShowConfiguration() {
118      if (Content != null) {
119        using (var dialog = new DataTableVisualPropertiesDialog(Content)) {
120          dialog.ShowDialog(this);
121        }
122      } else MessageBox.Show("Nothing to configure.");
123    }
124    protected virtual void AddDataRows(IEnumerable<DataRow> rows) {
125      foreach (var row in rows) {
126        RegisterDataRowEvents(row);
127        var series = new Series(row.Name);
128        if (row.VisualProperties.DisplayName.Trim() != String.Empty) series.LegendText = row.VisualProperties.DisplayName;
129        else series.LegendText = row.Name;
130        ConfigureSeries(series, row);
131        FillSeriesWithRowValues(series, row);
132        chart.Series.Add(series);
133      }
134      ConfigureChartArea(chart.ChartAreas[0]);
135      RecalculateAxesScale(chart.ChartAreas[0]);
136      UpdateYCursorInterval();
137    }
138
139    protected virtual void RemoveDataRows(IEnumerable<DataRow> rows) {
140      foreach (var row in rows) {
141        DeregisterDataRowEvents(row);
142        Series series = chart.Series[row.Name];
143        chart.Series.Remove(series);
144        if (invisibleSeries.Contains(series))
145          invisibleSeries.Remove(series);
146      }
147      RecalculateAxesScale(chart.ChartAreas[0]);
148    }
149
150    private void ConfigureSeries(Series series, DataRow row) {
151      RemoveCustomPropertyIfExists(series, "PointWidth");
152      series.BorderWidth = 1;
153      series.BorderDashStyle = ChartDashStyle.Solid;
154      series.BorderColor = Color.Empty;
155
156      if (row.VisualProperties.Color != Color.Empty)
157        series.Color = row.VisualProperties.Color;
158      else series.Color = Color.Empty;
159      series.IsVisibleInLegend = row.VisualProperties.IsVisibleInLegend;
160
161      switch (row.VisualProperties.ChartType) {
162        case DataRowVisualProperties.DataRowChartType.Line:
163          series.ChartType = SeriesChartType.FastLine;
164          series.BorderWidth = row.VisualProperties.LineWidth;
165          series.BorderDashStyle = ConvertLineStyle(row.VisualProperties.LineStyle);
166          break;
167        case DataRowVisualProperties.DataRowChartType.Bars:
168          // Bar is incompatible with anything but Bar and StackedBar*
169          if (!chart.Series.Any(x => x.ChartType != SeriesChartType.Bar && x.ChartType != SeriesChartType.StackedBar && x.ChartType != SeriesChartType.StackedBar100))
170            series.ChartType = SeriesChartType.Bar;
171          else {
172            series.ChartType = SeriesChartType.FastPoint; //default
173            row.VisualProperties.ChartType = DataRowVisualProperties.DataRowChartType.Points;
174          }
175          break;
176        case DataRowVisualProperties.DataRowChartType.Columns:
177          series.ChartType = SeriesChartType.Column;
178          break;
179        case DataRowVisualProperties.DataRowChartType.Points:
180          series.ChartType = SeriesChartType.FastPoint;
181          break;
182        case DataRowVisualProperties.DataRowChartType.Histogram:
183          series.ChartType = SeriesChartType.Column;
184          series.SetCustomProperty("PointWidth", "1");
185          if (!series.Color.IsEmpty && series.Color.GetBrightness() < 0.25)
186            series.BorderColor = Color.White;
187          else series.BorderColor = Color.Black;
188          break;
189        case DataRowVisualProperties.DataRowChartType.StepLine:
190          series.ChartType = SeriesChartType.StepLine;
191          series.BorderWidth = row.VisualProperties.LineWidth;
192          series.BorderDashStyle = ConvertLineStyle(row.VisualProperties.LineStyle);
193          break;
194        default:
195          series.ChartType = SeriesChartType.FastPoint;
196          break;
197      }
198      series.YAxisType = row.VisualProperties.SecondYAxis ? AxisType.Secondary : AxisType.Primary;
199      series.XAxisType = row.VisualProperties.SecondXAxis ? AxisType.Secondary : AxisType.Primary;
200      if (row.VisualProperties.DisplayName.Trim() != String.Empty) series.LegendText = row.VisualProperties.DisplayName;
201      else series.LegendText = row.Name;
202
203      string xAxisTitle = string.IsNullOrEmpty(Content.VisualProperties.XAxisTitle)
204                      ? "X"
205                      : Content.VisualProperties.XAxisTitle;
206      string yAxisTitle = string.IsNullOrEmpty(Content.VisualProperties.YAxisTitle)
207                            ? "Y"
208                            : Content.VisualProperties.YAxisTitle;
209      series.ToolTip =
210        series.LegendText + Environment.NewLine +
211        xAxisTitle + " = " + "#INDEX," + Environment.NewLine +
212        yAxisTitle + " = " + "#VAL";
213    }
214
215    private void ConfigureChartArea(ChartArea area) {
216      if (Content.VisualProperties.TitleFont != null) chart.Titles[0].Font = Content.VisualProperties.TitleFont;
217      if (!Content.VisualProperties.TitleColor.IsEmpty) chart.Titles[0].ForeColor = Content.VisualProperties.TitleColor;
218      chart.Titles[0].Text = Content.VisualProperties.Title;
219      chart.Titles[0].Visible = !string.IsNullOrEmpty(Content.VisualProperties.Title);
220
221      if (Content.VisualProperties.AxisTitleFont != null) area.AxisX.TitleFont = Content.VisualProperties.AxisTitleFont;
222      if (!Content.VisualProperties.AxisTitleColor.IsEmpty) area.AxisX.TitleForeColor = Content.VisualProperties.AxisTitleColor;
223      area.AxisX.Title = Content.VisualProperties.XAxisTitle;
224
225      if (Content.VisualProperties.AxisTitleFont != null) area.AxisX2.TitleFont = Content.VisualProperties.AxisTitleFont;
226      if (!Content.VisualProperties.AxisTitleColor.IsEmpty) area.AxisX2.TitleForeColor = Content.VisualProperties.AxisTitleColor;
227      area.AxisX2.Title = Content.VisualProperties.SecondXAxisTitle;
228
229      if (Content.VisualProperties.AxisTitleFont != null) area.AxisY.TitleFont = Content.VisualProperties.AxisTitleFont;
230      if (!Content.VisualProperties.AxisTitleColor.IsEmpty) area.AxisY.TitleForeColor = Content.VisualProperties.AxisTitleColor;
231      area.AxisY.Title = Content.VisualProperties.YAxisTitle;
232
233      if (Content.VisualProperties.AxisTitleFont != null) area.AxisY2.TitleFont = Content.VisualProperties.AxisTitleFont;
234      if (!Content.VisualProperties.AxisTitleColor.IsEmpty) area.AxisY2.TitleForeColor = Content.VisualProperties.AxisTitleColor;
235      area.AxisY2.Title = Content.VisualProperties.SecondYAxisTitle;
236
237      area.AxisX.IsLogarithmic = Content.VisualProperties.XAxisLogScale;
238      area.AxisX2.IsLogarithmic = Content.VisualProperties.SecondXAxisLogScale;
239      area.AxisY.IsLogarithmic = Content.VisualProperties.YAxisLogScale;
240      area.AxisY2.IsLogarithmic = Content.VisualProperties.SecondYAxisLogScale;
241    }
242
243    private void RecalculateAxesScale(ChartArea area) {
244      // Reset the axes bounds so that RecalculateAxesScale() will assign new bounds
245      foreach (Axis a in area.Axes) {
246        a.Minimum = double.NaN;
247        a.Maximum = double.NaN;
248      }
249      area.RecalculateAxesScale();
250      area.AxisX.IsMarginVisible = false;
251      area.AxisX2.IsMarginVisible = false;
252
253      if (!Content.VisualProperties.XAxisMinimumAuto && !double.IsNaN(Content.VisualProperties.XAxisMinimumFixedValue)) area.AxisX.Minimum = Content.VisualProperties.XAxisMinimumFixedValue;
254      if (!Content.VisualProperties.XAxisMaximumAuto && !double.IsNaN(Content.VisualProperties.XAxisMaximumFixedValue)) area.AxisX.Maximum = Content.VisualProperties.XAxisMaximumFixedValue;
255      if (!Content.VisualProperties.SecondXAxisMinimumAuto && !double.IsNaN(Content.VisualProperties.SecondXAxisMinimumFixedValue)) area.AxisX2.Minimum = Content.VisualProperties.SecondXAxisMinimumFixedValue;
256      if (!Content.VisualProperties.SecondXAxisMaximumAuto && !double.IsNaN(Content.VisualProperties.SecondXAxisMaximumFixedValue)) area.AxisX2.Maximum = Content.VisualProperties.SecondXAxisMaximumFixedValue;
257      if (!Content.VisualProperties.YAxisMinimumAuto && !double.IsNaN(Content.VisualProperties.YAxisMinimumFixedValue)) area.AxisY.Minimum = Content.VisualProperties.YAxisMinimumFixedValue;
258      if (!Content.VisualProperties.YAxisMaximumAuto && !double.IsNaN(Content.VisualProperties.YAxisMaximumFixedValue)) area.AxisY.Maximum = Content.VisualProperties.YAxisMaximumFixedValue;
259      if (!Content.VisualProperties.SecondYAxisMinimumAuto && !double.IsNaN(Content.VisualProperties.SecondYAxisMinimumFixedValue)) area.AxisY2.Minimum = Content.VisualProperties.SecondYAxisMinimumFixedValue;
260      if (!Content.VisualProperties.SecondYAxisMaximumAuto && !double.IsNaN(Content.VisualProperties.SecondYAxisMaximumFixedValue)) area.AxisY2.Maximum = Content.VisualProperties.SecondYAxisMaximumFixedValue;
261      if (area.AxisX.Minimum >= area.AxisX.Maximum) area.AxisX.Maximum = area.AxisX.Minimum + 1;
262      if (area.AxisX2.Minimum >= area.AxisX2.Maximum) area.AxisX2.Maximum = area.AxisX2.Minimum + 1;
263      if (area.AxisY.Minimum >= area.AxisY.Maximum) area.AxisY.Maximum = area.AxisY.Minimum + 1;
264      if (area.AxisY2.Minimum >= area.AxisY2.Maximum) area.AxisY2.Maximum = area.AxisY2.Minimum + 1;
265    }
266
267    protected virtual void UpdateYCursorInterval() {
268      double interestingValuesRange = (
269        from series in chart.Series
270        where series.Enabled
271        let values = (from point in series.Points
272                      where !point.IsEmpty
273                      select point.YValues[0]).DefaultIfEmpty(1.0)
274        let range = values.Max() - values.Min()
275        where range > 0.0
276        select range
277        ).DefaultIfEmpty(1.0).Min();
278
279      double digits = (int)Math.Log10(interestingValuesRange) - 3;
280      double yZoomInterval = Math.Pow(10, digits);
281      this.chart.ChartAreas[0].CursorY.Interval = yZoomInterval;
282    }
283
284    #region Event Handlers
285    #region Content Event Handlers
286    protected override void Content_NameChanged(object sender, EventArgs e) {
287      if (InvokeRequired)
288        Invoke(new EventHandler(Content_NameChanged), sender, e);
289      else {
290        chart.Titles[0].Text = Content.Name;
291        chart.Titles[0].Visible = !string.IsNullOrEmpty(Content.Name);
292        base.Content_NameChanged(sender, e);
293      }
294    }
295    private void Content_VisualPropertiesChanged(object sender, EventArgs e) {
296      if (InvokeRequired)
297        Invoke(new EventHandler(Content_VisualPropertiesChanged), sender, e);
298      else {
299        ConfigureChartArea(chart.ChartAreas[0]);
300        RecalculateAxesScale(chart.ChartAreas[0]); // axes min/max could have changed
301      }
302    }
303    #endregion
304    #region Rows Event Handlers
305    private void Rows_ItemsAdded(object sender, CollectionItemsChangedEventArgs<DataRow> e) {
306      if (InvokeRequired)
307        Invoke(new CollectionItemsChangedEventHandler<DataRow>(Rows_ItemsAdded), sender, e);
308      else {
309        AddDataRows(e.Items);
310      }
311    }
312    private void Rows_ItemsRemoved(object sender, CollectionItemsChangedEventArgs<DataRow> e) {
313      if (InvokeRequired)
314        Invoke(new CollectionItemsChangedEventHandler<DataRow>(Rows_ItemsRemoved), sender, e);
315      else {
316        RemoveDataRows(e.Items);
317      }
318    }
319    private void Rows_ItemsReplaced(object sender, CollectionItemsChangedEventArgs<DataRow> e) {
320      if (InvokeRequired)
321        Invoke(new CollectionItemsChangedEventHandler<DataRow>(Rows_ItemsReplaced), sender, e);
322      else {
323        RemoveDataRows(e.OldItems);
324        AddDataRows(e.Items);
325      }
326    }
327    private void Rows_CollectionReset(object sender, CollectionItemsChangedEventArgs<DataRow> e) {
328      if (InvokeRequired)
329        Invoke(new CollectionItemsChangedEventHandler<DataRow>(Rows_CollectionReset), sender, e);
330      else {
331        RemoveDataRows(e.OldItems);
332        AddDataRows(e.Items);
333      }
334    }
335    #endregion
336    #region Row Event Handlers
337    private void Row_VisualPropertiesChanged(object sender, EventArgs e) {
338      if (InvokeRequired)
339        Invoke(new EventHandler(Row_VisualPropertiesChanged), sender, e);
340      else {
341        DataRow row = (DataRow)sender;
342        Series series = chart.Series[row.Name];
343        series.Points.Clear();
344        ConfigureSeries(series, row);
345        FillSeriesWithRowValues(series, row);
346        RecalculateAxesScale(chart.ChartAreas[0]);
347      }
348    }
349    private void Row_NameChanged(object sender, EventArgs e) {
350      if (InvokeRequired)
351        Invoke(new EventHandler(Row_NameChanged), sender, e);
352      else {
353        DataRow row = (DataRow)sender;
354        chart.Series[row.Name].Name = row.Name;
355      }
356    }
357    #endregion
358    #region Values Event Handlers
359    private void Values_ItemsAdded(object sender, CollectionItemsChangedEventArgs<IndexedItem<double>> e) {
360      if (InvokeRequired)
361        Invoke(new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_ItemsAdded), sender, e);
362      else {
363        DataRow row = null;
364        valuesRowsTable.TryGetValue((IObservableList<double>)sender, out row);
365        if (row != null) {
366          Series rowSeries = chart.Series[row.Name];
367          if (!invisibleSeries.Contains(rowSeries)) {
368            rowSeries.Points.Clear();
369            FillSeriesWithRowValues(rowSeries, row);
370            RecalculateAxesScale(chart.ChartAreas[0]);
371            UpdateYCursorInterval();
372          }
373        }
374      }
375    }
376    private void Values_ItemsRemoved(object sender, CollectionItemsChangedEventArgs<IndexedItem<double>> e) {
377      if (InvokeRequired)
378        Invoke(new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_ItemsRemoved), sender, e);
379      else {
380        DataRow row = null;
381        valuesRowsTable.TryGetValue((IObservableList<double>)sender, out row);
382        if (row != null) {
383          Series rowSeries = chart.Series[row.Name];
384          if (!invisibleSeries.Contains(rowSeries)) {
385            rowSeries.Points.Clear();
386            FillSeriesWithRowValues(rowSeries, row);
387            RecalculateAxesScale(chart.ChartAreas[0]);
388            UpdateYCursorInterval();
389          }
390        }
391      }
392    }
393    private void Values_ItemsReplaced(object sender, CollectionItemsChangedEventArgs<IndexedItem<double>> e) {
394      if (InvokeRequired)
395        Invoke(new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_ItemsReplaced), sender, e);
396      else {
397        DataRow row = null;
398        valuesRowsTable.TryGetValue((IObservableList<double>)sender, out row);
399        if (row != null) {
400          Series rowSeries = chart.Series[row.Name];
401          if (!invisibleSeries.Contains(rowSeries)) {
402            if (row.VisualProperties.ChartType == DataRowVisualProperties.DataRowChartType.Histogram) {
403              rowSeries.Points.Clear();
404              FillSeriesWithRowValues(rowSeries, row);
405            } else {
406              foreach (IndexedItem<double> item in e.Items) {
407                if (IsInvalidValue(item.Value))
408                  rowSeries.Points[item.Index].IsEmpty = true;
409                else {
410                  rowSeries.Points[item.Index].YValues = new double[] { item.Value };
411                  rowSeries.Points[item.Index].IsEmpty = false;
412                }
413              }
414            }
415            RecalculateAxesScale(chart.ChartAreas[0]);
416            UpdateYCursorInterval();
417          }
418        }
419      }
420    }
421    private void Values_ItemsMoved(object sender, CollectionItemsChangedEventArgs<IndexedItem<double>> e) {
422      if (InvokeRequired)
423        Invoke(new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_ItemsMoved), sender, e);
424      else {
425        DataRow row = null;
426        valuesRowsTable.TryGetValue((IObservableList<double>)sender, out row);
427        if (row != null) {
428          Series rowSeries = chart.Series[row.Name];
429          if (!invisibleSeries.Contains(rowSeries)) {
430            rowSeries.Points.Clear();
431            FillSeriesWithRowValues(rowSeries, row);
432            RecalculateAxesScale(chart.ChartAreas[0]);
433            UpdateYCursorInterval();
434          }
435        }
436      }
437    }
438
439    private void Values_CollectionReset(object sender, CollectionItemsChangedEventArgs<IndexedItem<double>> e) {
440      if (InvokeRequired)
441        Invoke(new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_CollectionReset), sender, e);
442      else {
443        DataRow row = null;
444        valuesRowsTable.TryGetValue((IObservableList<double>)sender, out row);
445        if (row != null) {
446          Series rowSeries = chart.Series[row.Name];
447          if (!invisibleSeries.Contains(rowSeries)) {
448            rowSeries.Points.Clear();
449            FillSeriesWithRowValues(rowSeries, row);
450            RecalculateAxesScale(chart.ChartAreas[0]);
451            UpdateYCursorInterval();
452          }
453        }
454      }
455    }
456    #endregion
457    private void configureToolStripMenuItem_Click(object sender, EventArgs e) {
458      ShowConfiguration();
459    }
460    #endregion
461
462    #region Chart Event Handlers
463    private void chart_MouseDown(object sender, MouseEventArgs e) {
464      HitTestResult result = chart.HitTest(e.X, e.Y);
465      if (result.ChartElementType == ChartElementType.LegendItem) {
466        ToggleSeriesVisible(result.Series);
467      }
468    }
469    private void chart_MouseMove(object sender, MouseEventArgs e) {
470      HitTestResult result = chart.HitTest(e.X, e.Y);
471      if (result.ChartElementType == ChartElementType.LegendItem)
472        this.Cursor = Cursors.Hand;
473      else
474        this.Cursor = Cursors.Default;
475    }
476    private void chart_CustomizeLegend(object sender, CustomizeLegendEventArgs e) {
477      foreach (LegendItem legendItem in e.LegendItems) {
478        var series = chart.Series[legendItem.SeriesName];
479        if (series != null) {
480          bool seriesIsInvisible = invisibleSeries.Contains(series);
481          foreach (LegendCell cell in legendItem.Cells) {
482            cell.ForeColor = seriesIsInvisible ? Color.Gray : Color.Black;
483          }
484        }
485      }
486    }
487    #endregion
488
489    private void ToggleSeriesVisible(Series series) {
490      if (!invisibleSeries.Contains(series)) {
491        series.Points.Clear();
492        invisibleSeries.Add(series);
493      } else {
494        invisibleSeries.Remove(series);
495        if (Content != null) {
496
497          var row = (from r in Content.Rows
498                     where r.Name == series.Name
499                     select r).Single();
500          FillSeriesWithRowValues(series, row);
501          this.chart.Legends[series.Legend].ForeColor = Color.Black;
502          RecalculateAxesScale(chart.ChartAreas[0]);
503          UpdateYCursorInterval();
504        }
505      }
506    }
507
508    private void FillSeriesWithRowValues(Series series, DataRow row) {
509      switch (row.VisualProperties.ChartType) {
510        case DataRowVisualProperties.DataRowChartType.Histogram:
511          CalculateHistogram(series, row);
512          break;
513        default: {
514            bool yLogarithmic = series.YAxisType == AxisType.Primary
515                                  ? Content.VisualProperties.YAxisLogScale
516                                  : Content.VisualProperties.SecondYAxisLogScale;
517            bool xLogarithmic = series.XAxisType == AxisType.Primary
518                                  ? Content.VisualProperties.XAxisLogScale
519                                  : Content.VisualProperties.SecondXAxisLogScale;
520            for (int i = 0; i < row.Values.Count; i++) {
521              var value = row.Values[i];
522              var point = new DataPoint();
523              point.XValue = row.VisualProperties.StartIndexZero && !xLogarithmic ? i : i + 1;
524              if (IsInvalidValue(value) || (yLogarithmic && value <= 0))
525                point.IsEmpty = true;
526              else
527                point.YValues = new double[] { value };
528              series.Points.Add(point);
529            }
530          }
531          break;
532      }
533    }
534
535    protected virtual void CalculateHistogram(Series series, DataRow row) {
536      series.Points.Clear();
537      if (!row.Values.Any()) return;
538      int bins = row.VisualProperties.Bins;
539
540      double minValue = row.Values.Min();
541      double maxValue = row.Values.Max();
542      double 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 (!row.VisualProperties.ExactBins) {
550        intervalWidth = HumanRoundRange(intervalWidth);
551        minValue = Math.Floor(minValue / intervalWidth) * intervalWidth;
552        maxValue = Math.Ceiling(maxValue / intervalWidth) * intervalWidth;
553      }
554
555      double intervalCenter = intervalWidth / 2;
556
557      double min = 0.0, max = 0.0;
558      if (!Double.IsNaN(Content.VisualProperties.XAxisMinimumFixedValue) && !Content.VisualProperties.XAxisMinimumAuto)
559        min = Content.VisualProperties.XAxisMinimumFixedValue;
560      else min = minValue;
561      if (!Double.IsNaN(Content.VisualProperties.XAxisMaximumFixedValue) && !Content.VisualProperties.XAxisMaximumAuto)
562        max = Content.VisualProperties.XAxisMaximumFixedValue;
563      else max = maxValue + intervalWidth;
564
565      double axisInterval = 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 doubleRange = DoubleRange(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      // shift the chart to the left so the bars are placed on the intervals
583      if (valueFrequencies.First().Item1 < doubleRange.First())
584        series.Points.Add(new DataPoint(min - intervalWidth, 0));
585
586      // add data points
587      int j = 0;
588      foreach (var d in doubleRange) {
589        double sum = 0.0;
590        // sum the frequency values that fall within the same interval
591        while (j < valueFrequencies.Count && 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(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<double> DoubleRange(double min, double max, double step) {
611      double 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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