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source: trunk/sources/HeuristicLab.Data.Views/3.3/StringConvertibleMatrixView.cs @ 5314

Last change on this file since 5314 was 4850, checked in by mkommend, 14 years ago

Improved performance of StringConvertibleMatrixView when dealing with lots of columns (ticket #1283).
File size: 22.8 KB
Line 
1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2010 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.ComponentModel;
25using System.Drawing;
26using System.Linq;
27using System.Text;
28using System.Windows.Forms;
29using HeuristicLab.Common;
30using HeuristicLab.MainForm;
31using HeuristicLab.MainForm.WindowsForms;
32
33namespace HeuristicLab.Data.Views {
34  [View("StringConvertibleMatrix View")]
35  [Content(typeof(IStringConvertibleMatrix), true)]
36  public partial class StringConvertibleMatrixView : AsynchronousContentView {
37    private int[] virtualRowIndizes;
38    private List<KeyValuePair<int, SortOrder>> sortedColumnIndizes;
39    private RowComparer rowComparer;
40
41    public new IStringConvertibleMatrix Content {
42      get { return (IStringConvertibleMatrix)base.Content; }
43      set { base.Content = value; }
44    }
45
46    public override bool ReadOnly {
47      get {
48        if ((Content != null) && Content.ReadOnly) return true;
49        return base.ReadOnly;
50      }
51      set { base.ReadOnly = value; }
52    }
53
54    private bool showRowsAndColumnsTextBox;
55    public bool ShowRowsAndColumnsTextBox {
56      get { return showRowsAndColumnsTextBox; }
57      set {
58        showRowsAndColumnsTextBox = value;
59        UpdateVisibilityOfTextBoxes();
60      }
61    }
62
63    private bool showStatisticalInformation;
64    public bool ShowStatisticalInformation {
65      get { return showStatisticalInformation; }
66      set {
67        showStatisticalInformation = value;
68        UpdateVisibilityOfStatisticalInformation();
69      }
70    }
71
72    public StringConvertibleMatrixView() {
73      InitializeComponent();
74      ShowRowsAndColumnsTextBox = true;
75      ShowStatisticalInformation = true;
76      errorProvider.SetIconAlignment(rowsTextBox, ErrorIconAlignment.MiddleLeft);
77      errorProvider.SetIconPadding(rowsTextBox, 2);
78      errorProvider.SetIconAlignment(columnsTextBox, ErrorIconAlignment.MiddleLeft);
79      errorProvider.SetIconPadding(columnsTextBox, 2);
80      sortedColumnIndizes = new List<KeyValuePair<int, SortOrder>>();
81      rowComparer = new RowComparer();
82    }
83
84    protected override void DeregisterContentEvents() {
85      Content.ItemChanged -= new EventHandler<EventArgs<int, int>>(Content_ItemChanged);
86      Content.Reset -= new EventHandler(Content_Reset);
87      Content.ColumnNamesChanged -= new EventHandler(Content_ColumnNamesChanged);
88      Content.RowNamesChanged -= new EventHandler(Content_RowNamesChanged);
89      base.DeregisterContentEvents();
90    }
91    protected override void RegisterContentEvents() {
92      base.RegisterContentEvents();
93      Content.ItemChanged += new EventHandler<EventArgs<int, int>>(Content_ItemChanged);
94      Content.Reset += new EventHandler(Content_Reset);
95      Content.ColumnNamesChanged += new EventHandler(Content_ColumnNamesChanged);
96      Content.RowNamesChanged += new EventHandler(Content_RowNamesChanged);
97    }
98
99    protected override void OnContentChanged() {
100      base.OnContentChanged();
101      if (Content == null) {
102        rowsTextBox.Text = "";
103        columnsTextBox.Text = "";
104        dataGridView.Rows.Clear();
105        dataGridView.Columns.Clear();
106        virtualRowIndizes = new int[0];
107      } else
108        UpdateData();
109    }
110
111    protected override void SetEnabledStateOfControls() {
112      base.SetEnabledStateOfControls();
113      rowsTextBox.Enabled = Content != null;
114      columnsTextBox.Enabled = Content != null;
115      dataGridView.Enabled = Content != null;
116      rowsTextBox.ReadOnly = ReadOnly;
117      columnsTextBox.ReadOnly = ReadOnly;
118      dataGridView.ReadOnly = ReadOnly;
119    }
120
121    private void UpdateData() {
122      rowsTextBox.Text = Content.Rows.ToString();
123      rowsTextBox.Enabled = true;
124      columnsTextBox.Text = Content.Columns.ToString();
125      columnsTextBox.Enabled = true;
126      virtualRowIndizes = Enumerable.Range(0, Content.Rows).ToArray();
127
128      if (Content.Columns == 0 && dataGridView.ColumnCount != Content.Columns && !Content.ReadOnly)
129        Content.Columns = dataGridView.ColumnCount;
130      else {
131        DataGridViewColumn[] columns = new DataGridViewColumn[Content.Columns];
132        for (int i = 0; i < columns.Length; ++i) {
133          var column = new DataGridViewTextBoxColumn();
134          column.FillWeight = 1;
135          columns[i] = column;
136        }
137        dataGridView.Columns.Clear();
138        dataGridView.Columns.AddRange(columns);
139      }
140
141      //DataGridViews with rows but no columns are not allowed !
142      if (Content.Rows == 0 && dataGridView.RowCount != Content.Rows && !Content.ReadOnly)
143        Content.Rows = dataGridView.RowCount;
144      else
145        dataGridView.RowCount = Content.Rows;
146
147
148      ClearSorting();
149      UpdateColumnHeaders();
150      UpdateRowHeaders();
151
152      dataGridView.AutoResizeColumns(DataGridViewAutoSizeColumnsMode.ColumnHeader);
153      dataGridView.AutoResizeRowHeadersWidth(DataGridViewRowHeadersWidthSizeMode.AutoSizeToDisplayedHeaders);
154      dataGridView.Enabled = true;
155    }
156
157    protected virtual void UpdateColumnHeaders() {
158      HashSet<string> invisibleColumnNames = new HashSet<string>(dataGridView.Columns.OfType<DataGridViewColumn>()
159      .Where(c => !c.Visible && !string.IsNullOrEmpty(c.HeaderText)).Select(c => c.HeaderText));
160
161      for (int i = 0; i < dataGridView.ColumnCount; i++) {
162        if (i < Content.ColumnNames.Count())
163          dataGridView.Columns[i].HeaderText = Content.ColumnNames.ElementAt(i);
164        else
165          dataGridView.Columns[i].HeaderText = "Column " + (i + 1);
166        dataGridView.Columns[i].Visible = !invisibleColumnNames.Contains(dataGridView.Columns[i].HeaderText);
167      }
168    }
169    protected void UpdateRowHeaders() {
170      int index = dataGridView.FirstDisplayedScrollingRowIndex;
171      if (index == -1) index = 0;
172      int updatedRows = 0;
173      int count = dataGridView.DisplayedRowCount(true);
174
175      while (updatedRows < count) {
176        if (virtualRowIndizes[index] < Content.RowNames.Count())
177          dataGridView.Rows[index].HeaderCell.Value = Content.RowNames.ElementAt(virtualRowIndizes[index]);
178        else
179          dataGridView.Rows[index].HeaderCell.Value = "Row " + (index + 1);
180        if (dataGridView.Rows[index].Visible)
181          updatedRows++;
182        index++;
183      }
184    }
185
186    private void Content_RowNamesChanged(object sender, EventArgs e) {
187      if (InvokeRequired)
188        Invoke(new EventHandler(Content_RowNamesChanged), sender, e);
189      else
190        UpdateRowHeaders();
191    }
192    private void Content_ColumnNamesChanged(object sender, EventArgs e) {
193      if (InvokeRequired)
194        Invoke(new EventHandler(Content_ColumnNamesChanged), sender, e);
195      else
196        UpdateColumnHeaders();
197    }
198    private void Content_ItemChanged(object sender, EventArgs<int, int> e) {
199      if (InvokeRequired)
200        Invoke(new EventHandler<EventArgs<int, int>>(Content_ItemChanged), sender, e);
201      else
202        dataGridView.InvalidateCell(e.Value2, e.Value);
203    }
204    private void Content_Reset(object sender, EventArgs e) {
205      if (InvokeRequired)
206        Invoke(new EventHandler(Content_Reset), sender, e);
207      else
208        UpdateData();
209    }
210
211    #region TextBox Events
212    private void rowsTextBox_Validating(object sender, CancelEventArgs e) {
213      if (ReadOnly || Locked)
214        return;
215      int i = 0;
216      if (!int.TryParse(rowsTextBox.Text, out i) || (i <= 0)) {
217        e.Cancel = true;
218        errorProvider.SetError(rowsTextBox, "Invalid Number of Rows (Valid values are positive integers larger than 0)");
219        rowsTextBox.SelectAll();
220      }
221    }
222    private void rowsTextBox_Validated(object sender, EventArgs e) {
223      if (!Content.ReadOnly) Content.Rows = int.Parse(rowsTextBox.Text);
224      errorProvider.SetError(rowsTextBox, string.Empty);
225    }
226    private void rowsTextBox_KeyDown(object sender, KeyEventArgs e) {
227      if (e.KeyCode == Keys.Enter || e.KeyCode == Keys.Return)
228        rowsLabel.Focus();  // set focus on label to validate data
229      if (e.KeyCode == Keys.Escape) {
230        rowsTextBox.Text = Content.Rows.ToString();
231        rowsLabel.Focus();  // set focus on label to validate data
232      }
233    }
234    private void columnsTextBox_Validating(object sender, CancelEventArgs e) {
235      if (ReadOnly || Locked)
236        return;
237      int i = 0;
238      if (!int.TryParse(columnsTextBox.Text, out i) || (i <= 0)) {
239        e.Cancel = true;
240        errorProvider.SetError(columnsTextBox, "Invalid Number of Columns (Valid values are positive integers larger than 0)");
241        columnsTextBox.SelectAll();
242      }
243    }
244    private void columnsTextBox_Validated(object sender, EventArgs e) {
245      if (!Content.ReadOnly) Content.Columns = int.Parse(columnsTextBox.Text);
246      errorProvider.SetError(columnsTextBox, string.Empty);
247    }
248    private void columnsTextBox_KeyDown(object sender, KeyEventArgs e) {
249      if (e.KeyCode == Keys.Enter || e.KeyCode == Keys.Return)
250        columnsLabel.Focus();  // set focus on label to validate data
251      if (e.KeyCode == Keys.Escape) {
252        columnsTextBox.Text = Content.Columns.ToString();
253        columnsLabel.Focus();  // set focus on label to validate data
254      }
255    }
256    #endregion
257
258    #region DataGridView Events
259    private void dataGridView_CellValidating(object sender, DataGridViewCellValidatingEventArgs e) {
260      if (!dataGridView.ReadOnly) {
261        string errorMessage;
262        if (Content != null && !Content.Validate(e.FormattedValue.ToString(), out errorMessage)) {
263          e.Cancel = true;
264          dataGridView.Rows[e.RowIndex].ErrorText = errorMessage;
265        }
266      }
267    }
268    private void dataGridView_CellParsing(object sender, DataGridViewCellParsingEventArgs e) {
269      if (!dataGridView.ReadOnly) {
270        string value = e.Value.ToString();
271        int rowIndex = virtualRowIndizes[e.RowIndex];
272        e.ParsingApplied = Content.SetValue(value, rowIndex, e.ColumnIndex);
273        if (e.ParsingApplied) e.Value = Content.GetValue(rowIndex, e.ColumnIndex);
274      }
275    }
276    private void dataGridView_CellEndEdit(object sender, DataGridViewCellEventArgs e) {
277      dataGridView.Rows[e.RowIndex].ErrorText = string.Empty;
278    }
279    private void dataGridView_CellValueNeeded(object sender, DataGridViewCellValueEventArgs e) {
280      if (Content != null && e.RowIndex < Content.Rows && e.ColumnIndex < Content.Columns) {
281        int rowIndex = virtualRowIndizes[e.RowIndex];
282        e.Value = Content.GetValue(rowIndex, e.ColumnIndex);
283      }
284    }
285
286    private void dataGridView_Scroll(object sender, System.Windows.Forms.ScrollEventArgs e) {
287      this.UpdateRowHeaders();
288    }
289    private void dataGridView_Resize(object sender, EventArgs e) {
290      this.UpdateRowHeaders();
291    }
292
293    private void dataGridView_KeyDown(object sender, KeyEventArgs e) {
294      if (!ReadOnly && e.Control && e.KeyCode == Keys.V)
295        PasteValuesToDataGridView();
296      else if (e.Control && e.KeyCode == Keys.C)
297        CopyValuesFromDataGridView();
298    }
299
300    private void CopyValuesFromDataGridView() {
301      if (dataGridView.SelectedCells.Count == 0) return;
302      StringBuilder s = new StringBuilder();
303      int minRowIndex = dataGridView.SelectedCells[0].RowIndex;
304      int maxRowIndex = dataGridView.SelectedCells[dataGridView.SelectedCells.Count - 1].RowIndex;
305      int minColIndex = dataGridView.SelectedCells[0].ColumnIndex;
306      int maxColIndex = dataGridView.SelectedCells[dataGridView.SelectedCells.Count - 1].ColumnIndex;
307
308      if (minRowIndex > maxRowIndex) {
309        int temp = minRowIndex;
310        minRowIndex = maxRowIndex;
311        maxRowIndex = temp;
312      }
313      if (minColIndex > maxColIndex) {
314        int temp = minColIndex;
315        minColIndex = maxColIndex;
316        maxColIndex = temp;
317      }
318
319      bool addRowNames = dataGridView.AreAllCellsSelected(false) && Content.RowNames.Count() > 0;
320      bool addColumnNames = dataGridView.AreAllCellsSelected(false) && Content.ColumnNames.Count() > 0;
321
322      //add colum names
323      if (addColumnNames) {
324        if (addRowNames)
325          s.Append('\t');
326
327        DataGridViewColumn column = dataGridView.Columns.GetFirstColumn(DataGridViewElementStates.Visible);
328        while (column != null) {
329          s.Append(column.HeaderText);
330          s.Append('\t');
331          column = dataGridView.Columns.GetNextColumn(column, DataGridViewElementStates.Visible, DataGridViewElementStates.None);
332        }
333        s.Remove(s.Length - 1, 1); //remove last tab
334        s.Append(Environment.NewLine);
335      }
336
337      for (int i = minRowIndex; i <= maxRowIndex; i++) {
338        int rowIndex = this.virtualRowIndizes[i];
339        if (addRowNames) {
340          s.Append(Content.RowNames.ElementAt(rowIndex));
341          s.Append('\t');
342        }
343
344        DataGridViewColumn column = dataGridView.Columns.GetFirstColumn(DataGridViewElementStates.Visible);
345        while (column != null) {
346          DataGridViewCell cell = dataGridView[column.Index, i];
347          if (cell.Selected) {
348            s.Append(Content.GetValue(rowIndex, column.Index));
349            s.Append('\t');
350          }
351
352          column = dataGridView.Columns.GetNextColumn(column, DataGridViewElementStates.Visible, DataGridViewElementStates.None);
353        }
354        s.Remove(s.Length - 1, 1); //remove last tab
355        s.Append(Environment.NewLine);
356      }
357      Clipboard.SetText(s.ToString());
358    }
359
360    private void PasteValuesToDataGridView() {
361      string[,] values = SplitClipboardString(Clipboard.GetText());
362      int rowIndex = 0;
363      int columnIndex = 0;
364      if (dataGridView.CurrentCell != null) {
365        rowIndex = dataGridView.CurrentCell.RowIndex;
366        columnIndex = dataGridView.CurrentCell.ColumnIndex;
367      }
368
369      for (int row = 0; row < values.GetLength(1); row++) {
370        if (row + rowIndex >= Content.Rows)
371          Content.Rows = Content.Rows + 1;
372        for (int col = 0; col < values.GetLength(0); col++) {
373          if (col + columnIndex >= Content.Columns)
374            Content.Columns = Content.Columns + 1;
375          Content.SetValue(values[col, row], row + rowIndex, col + columnIndex);
376        }
377      }
378      ClearSorting();
379    }
380    private string[,] SplitClipboardString(string clipboardText) {
381      clipboardText = clipboardText.Remove(clipboardText.Length - Environment.NewLine.Length);  //remove last newline constant
382      string[,] values = null;
383      string[] lines = clipboardText.Split(new string[] { Environment.NewLine }, StringSplitOptions.None);
384      string[] cells;
385      for (int i = 0; i < lines.Length; i++) {
386        cells = lines[i].Split('\t');
387        if (values == null)
388          values = new string[cells.Length, lines.Length];
389        for (int j = 0; j < cells.Length; j++)
390          values[j, i] = string.IsNullOrEmpty(cells[j]) ? string.Empty : cells[j];
391      }
392      return values;
393    }
394
395    private void dataGridView_ColumnHeaderMouseClick(object sender, DataGridViewCellMouseEventArgs e) {
396      if (Content != null) {
397        if (e.Button == MouseButtons.Left && Content.SortableView) {
398          bool addToSortedIndizes = (Control.ModifierKeys & Keys.Control) == Keys.Control;
399          SortOrder newSortOrder = SortOrder.Ascending;
400          if (sortedColumnIndizes.Any(x => x.Key == e.ColumnIndex)) {
401            SortOrder oldSortOrder = sortedColumnIndizes.Where(x => x.Key == e.ColumnIndex).First().Value;
402            int enumLength = Enum.GetValues(typeof(SortOrder)).Length;
403            newSortOrder = oldSortOrder = (SortOrder)Enum.Parse(typeof(SortOrder), ((((int)oldSortOrder) + 1) % enumLength).ToString());
404          }
405
406          if (!addToSortedIndizes)
407            sortedColumnIndizes.Clear();
408
409          if (sortedColumnIndizes.Any(x => x.Key == e.ColumnIndex)) {
410            int sortedIndex = sortedColumnIndizes.FindIndex(x => x.Key == e.ColumnIndex);
411            if (newSortOrder != SortOrder.None)
412              sortedColumnIndizes[sortedIndex] = new KeyValuePair<int, SortOrder>(e.ColumnIndex, newSortOrder);
413            else
414              sortedColumnIndizes.RemoveAt(sortedIndex);
415          } else
416            if (newSortOrder != SortOrder.None)
417              sortedColumnIndizes.Add(new KeyValuePair<int, SortOrder>(e.ColumnIndex, newSortOrder));
418          Sort();
419        }
420      }
421    }
422
423    protected virtual void ClearSorting() {
424      virtualRowIndizes = Enumerable.Range(0, Content.Rows).ToArray();
425      sortedColumnIndizes.Clear();
426      UpdateSortGlyph();
427    }
428
429    private void Sort() {
430      virtualRowIndizes = Sort(sortedColumnIndizes);
431      UpdateSortGlyph();
432      UpdateRowHeaders();
433      dataGridView.Invalidate();
434    }
435    protected virtual int[] Sort(IEnumerable<KeyValuePair<int, SortOrder>> sortedColumns) {
436      int[] newSortedIndex = Enumerable.Range(0, Content.Rows).ToArray();
437      if (sortedColumns.Count() != 0) {
438        rowComparer.SortedIndizes = sortedColumns;
439        rowComparer.Matrix = Content;
440        Array.Sort(newSortedIndex, rowComparer);
441      }
442      return newSortedIndex;
443    }
444    private void UpdateSortGlyph() {
445      foreach (DataGridViewColumn col in this.dataGridView.Columns)
446        col.HeaderCell.SortGlyphDirection = SortOrder.None;
447      foreach (KeyValuePair<int, SortOrder> p in sortedColumnIndizes)
448        this.dataGridView.Columns[p.Key].HeaderCell.SortGlyphDirection = p.Value;
449    }
450    #endregion
451
452    public class RowComparer : IComparer<int> {
453      public RowComparer() {
454      }
455
456      private List<KeyValuePair<int, SortOrder>> sortedIndizes;
457      public IEnumerable<KeyValuePair<int, SortOrder>> SortedIndizes {
458        get { return this.sortedIndizes; }
459        set { sortedIndizes = new List<KeyValuePair<int, SortOrder>>(value); }
460      }
461      private IStringConvertibleMatrix matrix;
462      public IStringConvertibleMatrix Matrix {
463        get { return this.matrix; }
464        set { this.matrix = value; }
465      }
466
467      public int Compare(int x, int y) {
468        int result = 0;
469        double double1, double2;
470        DateTime dateTime1, dateTime2;
471        TimeSpan timeSpan1, timeSpan2;
472        string string1, string2;
473
474        if (matrix == null)
475          throw new InvalidOperationException("Could not sort IStringConvertibleMatrix if the matrix member is null.");
476        if (sortedIndizes == null)
477          return 0;
478
479        foreach (KeyValuePair<int, SortOrder> pair in sortedIndizes.Where(p => p.Value != SortOrder.None)) {
480          string1 = matrix.GetValue(x, pair.Key);
481          string2 = matrix.GetValue(y, pair.Key);
482          if (double.TryParse(string1, out double1) && double.TryParse(string2, out double2))
483            result = double1.CompareTo(double2);
484          else if (DateTime.TryParse(string1, out dateTime1) && DateTime.TryParse(string2, out dateTime2))
485            result = dateTime1.CompareTo(dateTime2);
486          else if (TimeSpan.TryParse(string1, out timeSpan1) && TimeSpan.TryParse(string2, out timeSpan2))
487            result = timeSpan1.CompareTo(timeSpan2);
488          else {
489            if (string1 != null)
490              result = string1.CompareTo(string2);
491            else if (string2 != null)
492              result = string2.CompareTo(string1) * -1;
493          }
494          if (pair.Value == SortOrder.Descending)
495            result *= -1;
496          if (result != 0)
497            return result;
498        }
499        return result;
500      }
501    }
502
503    private void dataGridView_MouseClick(object sender, System.Windows.Forms.MouseEventArgs e) {
504      if (Content == null) return;
505      if (e.Button == MouseButtons.Right && Content.ColumnNames.Count() != 0)
506        contextMenu.Show(MousePosition);
507    }
508    private void ShowHideColumns_Click(object sender, EventArgs e) {
509      new ColumnsVisibilityDialog(this.dataGridView.Columns.Cast<DataGridViewColumn>()).ShowDialog();
510    }
511
512    private void UpdateVisibilityOfTextBoxes() {
513      rowsTextBox.Visible = columnsTextBox.Visible = showRowsAndColumnsTextBox;
514      rowsLabel.Visible = columnsLabel.Visible = showRowsAndColumnsTextBox;
515      UpdateDataGridViewSizeAndLocation();
516    }
517
518    private void UpdateVisibilityOfStatisticalInformation() {
519      statisticsTextBox.Visible = showStatisticalInformation;
520      UpdateDataGridViewSizeAndLocation();
521    }
522
523    private void UpdateDataGridViewSizeAndLocation() {
524      int headerSize = columnsTextBox.Location.Y + columnsTextBox.Size.Height +
525       columnsTextBox.Margin.Bottom + dataGridView.Margin.Top;
526
527      int offset = showRowsAndColumnsTextBox ? headerSize : 0;
528      dataGridView.Location = new Point(0, offset);
529
530      int statisticsTextBoxHeight = showStatisticalInformation ? statisticsTextBox.Height + statisticsTextBox.Margin.Top + statisticsTextBox.Margin.Bottom : 0;
531      dataGridView.Size = new Size(Size.Width, Size.Height - offset - statisticsTextBoxHeight);
532    }
533
534    private void dataGridView_SelectionChanged(object sender, EventArgs e) {
535      string stringFormat = "{0,20:0.0000}";
536      statisticsTextBox.Text = string.Empty;
537      if (dataGridView.SelectedCells.Count > 1) {
538        List<double> selectedValues = new List<double>();
539        foreach (DataGridViewCell cell in dataGridView.SelectedCells) {
540          double value;
541          if (!double.TryParse(cell.Value.ToString(), out value)) return;
542          selectedValues.Add(value);
543        }
544        if (selectedValues.Count > 1) {
545          StringBuilder labelText = new StringBuilder();
546          labelText.Append("Count: " + string.Format(stringFormat, selectedValues.Count) + "    ");
547          labelText.Append("Sum: " + string.Format(stringFormat, selectedValues.Sum()) + "    ");
548          labelText.Append("Min: " + string.Format(stringFormat, selectedValues.Min()) + "    ");
549          labelText.Append("Max: " + string.Format(stringFormat, selectedValues.Max()) + "    ");
550          labelText.Append("Average: " + string.Format(stringFormat, selectedValues.Average()) + "    ");
551          labelText.Append("Standard Deviation: " + string.Format(stringFormat, selectedValues.StandardDeviation()) + "    ");
552
553          statisticsTextBox.Text = labelText.ToString();
554        }
555      }
556    }
557  }
558}
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