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source: branches/HiveHiveEngine/HeuristicLab.Data.Views/3.3/StringConvertibleMatrixView.cs @ 9955

Last change on this file since 9955 was 7259, checked in by swagner, 13 years ago

Updated year of copyrights to 2012 (#1716)
File size: 22.9 KB
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1#region License Information
2/* HeuristicLab
3 * Copyright (C) 2002-2012 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 DataGridView DataGridView {
47      get { return dataGridView; }
48    }
49
50    public override bool ReadOnly {
51      get {
52        if ((Content != null) && Content.ReadOnly) return true;
53        return base.ReadOnly;
54      }
55      set { base.ReadOnly = value; }
56    }
57
58    private bool showRowsAndColumnsTextBox;
59    public bool ShowRowsAndColumnsTextBox {
60      get { return showRowsAndColumnsTextBox; }
61      set {
62        showRowsAndColumnsTextBox = value;
63        UpdateVisibilityOfTextBoxes();
64      }
65    }
66
67    private bool showStatisticalInformation;
68    public bool ShowStatisticalInformation {
69      get { return showStatisticalInformation; }
70      set {
71        showStatisticalInformation = value;
72        UpdateVisibilityOfStatisticalInformation();
73      }
74    }
75
76    public StringConvertibleMatrixView() {
77      InitializeComponent();
78      ShowRowsAndColumnsTextBox = true;
79      ShowStatisticalInformation = true;
80      errorProvider.SetIconAlignment(rowsTextBox, ErrorIconAlignment.MiddleLeft);
81      errorProvider.SetIconPadding(rowsTextBox, 2);
82      errorProvider.SetIconAlignment(columnsTextBox, ErrorIconAlignment.MiddleLeft);
83      errorProvider.SetIconPadding(columnsTextBox, 2);
84      sortedColumnIndizes = new List<KeyValuePair<int, SortOrder>>();
85      rowComparer = new RowComparer();
86    }
87
88    protected override void DeregisterContentEvents() {
89      Content.ItemChanged -= new EventHandler<EventArgs<int, int>>(Content_ItemChanged);
90      Content.Reset -= new EventHandler(Content_Reset);
91      Content.ColumnNamesChanged -= new EventHandler(Content_ColumnNamesChanged);
92      Content.RowNamesChanged -= new EventHandler(Content_RowNamesChanged);
93      base.DeregisterContentEvents();
94    }
95    protected override void RegisterContentEvents() {
96      base.RegisterContentEvents();
97      Content.ItemChanged += new EventHandler<EventArgs<int, int>>(Content_ItemChanged);
98      Content.Reset += new EventHandler(Content_Reset);
99      Content.ColumnNamesChanged += new EventHandler(Content_ColumnNamesChanged);
100      Content.RowNamesChanged += new EventHandler(Content_RowNamesChanged);
101    }
102
103    protected override void OnContentChanged() {
104      base.OnContentChanged();
105      if (Content == null) {
106        rowsTextBox.Text = "";
107        columnsTextBox.Text = "";
108        dataGridView.Rows.Clear();
109        dataGridView.Columns.Clear();
110        virtualRowIndizes = new int[0];
111      } else
112        UpdateData();
113    }
114
115    protected override void SetEnabledStateOfControls() {
116      base.SetEnabledStateOfControls();
117      rowsTextBox.Enabled = Content != null;
118      columnsTextBox.Enabled = Content != null;
119      dataGridView.Enabled = Content != null;
120      rowsTextBox.ReadOnly = ReadOnly;
121      columnsTextBox.ReadOnly = ReadOnly;
122      dataGridView.ReadOnly = ReadOnly;
123    }
124
125    private void UpdateData() {
126      rowsTextBox.Text = Content.Rows.ToString();
127      rowsTextBox.Enabled = true;
128      columnsTextBox.Text = Content.Columns.ToString();
129      columnsTextBox.Enabled = true;
130      virtualRowIndizes = Enumerable.Range(0, Content.Rows).ToArray();
131
132      if (Content.Columns == 0 && dataGridView.ColumnCount != Content.Columns && !Content.ReadOnly)
133        Content.Columns = dataGridView.ColumnCount;
134      else {
135        DataGridViewColumn[] columns = new DataGridViewColumn[Content.Columns];
136        for (int i = 0; i < columns.Length; ++i) {
137          var column = new DataGridViewTextBoxColumn();
138          column.FillWeight = 1;
139          columns[i] = column;
140        }
141        dataGridView.Columns.Clear();
142        dataGridView.Columns.AddRange(columns);
143      }
144
145      //DataGridViews with rows but no columns are not allowed !
146      if (Content.Rows == 0 && dataGridView.RowCount != Content.Rows && !Content.ReadOnly)
147        Content.Rows = dataGridView.RowCount;
148      else
149        dataGridView.RowCount = Content.Rows;
150
151
152      ClearSorting();
153      UpdateColumnHeaders();
154      UpdateRowHeaders();
155
156      dataGridView.AutoResizeColumns(DataGridViewAutoSizeColumnsMode.ColumnHeader);
157      dataGridView.AutoResizeRowHeadersWidth(DataGridViewRowHeadersWidthSizeMode.AutoSizeToDisplayedHeaders);
158      dataGridView.Enabled = true;
159    }
160
161    protected virtual void UpdateColumnHeaders() {
162      HashSet<string> invisibleColumnNames = new HashSet<string>(dataGridView.Columns.OfType<DataGridViewColumn>()
163      .Where(c => !c.Visible && !string.IsNullOrEmpty(c.HeaderText)).Select(c => c.HeaderText));
164
165      for (int i = 0; i < dataGridView.ColumnCount; i++) {
166        if (i < Content.ColumnNames.Count())
167          dataGridView.Columns[i].HeaderText = Content.ColumnNames.ElementAt(i);
168        else
169          dataGridView.Columns[i].HeaderText = "Column " + (i + 1);
170        dataGridView.Columns[i].Visible = !invisibleColumnNames.Contains(dataGridView.Columns[i].HeaderText);
171      }
172    }
173    protected void UpdateRowHeaders() {
174      int index = dataGridView.FirstDisplayedScrollingRowIndex;
175      if (index == -1) index = 0;
176      int updatedRows = 0;
177      int count = dataGridView.DisplayedRowCount(true);
178
179      while (updatedRows < count) {
180        if (virtualRowIndizes[index] < Content.RowNames.Count())
181          dataGridView.Rows[index].HeaderCell.Value = Content.RowNames.ElementAt(virtualRowIndizes[index]);
182        else
183          dataGridView.Rows[index].HeaderCell.Value = "Row " + (index + 1);
184        if (dataGridView.Rows[index].Visible)
185          updatedRows++;
186        index++;
187      }
188    }
189
190    private void Content_RowNamesChanged(object sender, EventArgs e) {
191      if (InvokeRequired)
192        Invoke(new EventHandler(Content_RowNamesChanged), sender, e);
193      else
194        UpdateRowHeaders();
195    }
196    private void Content_ColumnNamesChanged(object sender, EventArgs e) {
197      if (InvokeRequired)
198        Invoke(new EventHandler(Content_ColumnNamesChanged), sender, e);
199      else
200        UpdateColumnHeaders();
201    }
202    private void Content_ItemChanged(object sender, EventArgs<int, int> e) {
203      if (InvokeRequired)
204        Invoke(new EventHandler<EventArgs<int, int>>(Content_ItemChanged), sender, e);
205      else
206        dataGridView.InvalidateCell(e.Value2, e.Value);
207    }
208    private void Content_Reset(object sender, EventArgs e) {
209      if (InvokeRequired)
210        Invoke(new EventHandler(Content_Reset), sender, e);
211      else
212        UpdateData();
213    }
214
215    #region TextBox Events
216    private void rowsTextBox_Validating(object sender, CancelEventArgs e) {
217      if (ReadOnly || Locked)
218        return;
219      int i = 0;
220      if (!int.TryParse(rowsTextBox.Text, out i) || (i <= 0)) {
221        e.Cancel = true;
222        errorProvider.SetError(rowsTextBox, "Invalid Number of Rows (Valid values are positive integers larger than 0)");
223        rowsTextBox.SelectAll();
224      }
225    }
226    private void rowsTextBox_Validated(object sender, EventArgs e) {
227      if (!Content.ReadOnly) Content.Rows = int.Parse(rowsTextBox.Text);
228      errorProvider.SetError(rowsTextBox, string.Empty);
229    }
230    private void rowsTextBox_KeyDown(object sender, KeyEventArgs e) {
231      if (e.KeyCode == Keys.Enter || e.KeyCode == Keys.Return)
232        rowsLabel.Focus();  // set focus on label to validate data
233      if (e.KeyCode == Keys.Escape) {
234        rowsTextBox.Text = Content.Rows.ToString();
235        rowsLabel.Focus();  // set focus on label to validate data
236      }
237    }
238    private void columnsTextBox_Validating(object sender, CancelEventArgs e) {
239      if (ReadOnly || Locked)
240        return;
241      int i = 0;
242      if (!int.TryParse(columnsTextBox.Text, out i) || (i <= 0)) {
243        e.Cancel = true;
244        errorProvider.SetError(columnsTextBox, "Invalid Number of Columns (Valid values are positive integers larger than 0)");
245        columnsTextBox.SelectAll();
246      }
247    }
248    private void columnsTextBox_Validated(object sender, EventArgs e) {
249      if (!Content.ReadOnly) Content.Columns = int.Parse(columnsTextBox.Text);
250      errorProvider.SetError(columnsTextBox, string.Empty);
251    }
252    private void columnsTextBox_KeyDown(object sender, KeyEventArgs e) {
253      if (e.KeyCode == Keys.Enter || e.KeyCode == Keys.Return)
254        columnsLabel.Focus();  // set focus on label to validate data
255      if (e.KeyCode == Keys.Escape) {
256        columnsTextBox.Text = Content.Columns.ToString();
257        columnsLabel.Focus();  // set focus on label to validate data
258      }
259    }
260    #endregion
261
262    #region DataGridView Events
263    private void dataGridView_CellValidating(object sender, DataGridViewCellValidatingEventArgs e) {
264      if (!dataGridView.ReadOnly) {
265        string errorMessage;
266        if (Content != null && !Content.Validate(e.FormattedValue.ToString(), out errorMessage)) {
267          e.Cancel = true;
268          dataGridView.Rows[e.RowIndex].ErrorText = errorMessage;
269        }
270      }
271    }
272    private void dataGridView_CellParsing(object sender, DataGridViewCellParsingEventArgs e) {
273      if (!dataGridView.ReadOnly) {
274        string value = e.Value.ToString();
275        int rowIndex = virtualRowIndizes[e.RowIndex];
276        e.ParsingApplied = Content.SetValue(value, rowIndex, e.ColumnIndex);
277        if (e.ParsingApplied) e.Value = Content.GetValue(rowIndex, e.ColumnIndex);
278      }
279    }
280    private void dataGridView_CellEndEdit(object sender, DataGridViewCellEventArgs e) {
281      dataGridView.Rows[e.RowIndex].ErrorText = string.Empty;
282    }
283    private void dataGridView_CellValueNeeded(object sender, DataGridViewCellValueEventArgs e) {
284      if (Content != null && e.RowIndex < Content.Rows && e.ColumnIndex < Content.Columns) {
285        int rowIndex = virtualRowIndizes[e.RowIndex];
286        e.Value = Content.GetValue(rowIndex, e.ColumnIndex);
287      }
288    }
289
290    private void dataGridView_Scroll(object sender, System.Windows.Forms.ScrollEventArgs e) {
291      this.UpdateRowHeaders();
292    }
293    private void dataGridView_Resize(object sender, EventArgs e) {
294      this.UpdateRowHeaders();
295    }
296
297    private void dataGridView_KeyDown(object sender, KeyEventArgs e) {
298      if (!ReadOnly && e.Control && e.KeyCode == Keys.V)
299        PasteValuesToDataGridView();
300      else if (e.Control && e.KeyCode == Keys.C)
301        CopyValuesFromDataGridView();
302    }
303
304    private void CopyValuesFromDataGridView() {
305      if (dataGridView.SelectedCells.Count == 0) return;
306      StringBuilder s = new StringBuilder();
307      int minRowIndex = dataGridView.SelectedCells[0].RowIndex;
308      int maxRowIndex = dataGridView.SelectedCells[dataGridView.SelectedCells.Count - 1].RowIndex;
309      int minColIndex = dataGridView.SelectedCells[0].ColumnIndex;
310      int maxColIndex = dataGridView.SelectedCells[dataGridView.SelectedCells.Count - 1].ColumnIndex;
311
312      if (minRowIndex > maxRowIndex) {
313        int temp = minRowIndex;
314        minRowIndex = maxRowIndex;
315        maxRowIndex = temp;
316      }
317      if (minColIndex > maxColIndex) {
318        int temp = minColIndex;
319        minColIndex = maxColIndex;
320        maxColIndex = temp;
321      }
322
323      bool addRowNames = dataGridView.AreAllCellsSelected(false) && Content.RowNames.Count() > 0;
324      bool addColumnNames = dataGridView.AreAllCellsSelected(false) && Content.ColumnNames.Count() > 0;
325
326      //add colum names
327      if (addColumnNames) {
328        if (addRowNames)
329          s.Append('\t');
330
331        DataGridViewColumn column = dataGridView.Columns.GetFirstColumn(DataGridViewElementStates.Visible);
332        while (column != null) {
333          s.Append(column.HeaderText);
334          s.Append('\t');
335          column = dataGridView.Columns.GetNextColumn(column, DataGridViewElementStates.Visible, DataGridViewElementStates.None);
336        }
337        s.Remove(s.Length - 1, 1); //remove last tab
338        s.Append(Environment.NewLine);
339      }
340
341      for (int i = minRowIndex; i <= maxRowIndex; i++) {
342        int rowIndex = this.virtualRowIndizes[i];
343        if (addRowNames) {
344          s.Append(Content.RowNames.ElementAt(rowIndex));
345          s.Append('\t');
346        }
347
348        DataGridViewColumn column = dataGridView.Columns.GetFirstColumn(DataGridViewElementStates.Visible);
349        while (column != null) {
350          DataGridViewCell cell = dataGridView[column.Index, i];
351          if (cell.Selected) {
352            s.Append(Content.GetValue(rowIndex, column.Index));
353            s.Append('\t');
354          }
355
356          column = dataGridView.Columns.GetNextColumn(column, DataGridViewElementStates.Visible, DataGridViewElementStates.None);
357        }
358        s.Remove(s.Length - 1, 1); //remove last tab
359        s.Append(Environment.NewLine);
360      }
361      Clipboard.SetText(s.ToString());
362    }
363
364    private void PasteValuesToDataGridView() {
365      string[,] values = SplitClipboardString(Clipboard.GetText());
366      int rowIndex = 0;
367      int columnIndex = 0;
368      if (dataGridView.CurrentCell != null) {
369        rowIndex = dataGridView.CurrentCell.RowIndex;
370        columnIndex = dataGridView.CurrentCell.ColumnIndex;
371      }
372
373      for (int row = 0; row < values.GetLength(1); row++) {
374        if (row + rowIndex >= Content.Rows)
375          Content.Rows = Content.Rows + 1;
376        for (int col = 0; col < values.GetLength(0); col++) {
377          if (col + columnIndex >= Content.Columns)
378            Content.Columns = Content.Columns + 1;
379          Content.SetValue(values[col, row], row + rowIndex, col + columnIndex);
380        }
381      }
382      ClearSorting();
383    }
384    private string[,] SplitClipboardString(string clipboardText) {
385      clipboardText = clipboardText.Remove(clipboardText.Length - Environment.NewLine.Length);  //remove last newline constant
386      string[,] values = null;
387      string[] lines = clipboardText.Split(new string[] { Environment.NewLine }, StringSplitOptions.None);
388      string[] cells;
389      for (int i = 0; i < lines.Length; i++) {
390        cells = lines[i].Split('\t');
391        if (values == null)
392          values = new string[cells.Length, lines.Length];
393        for (int j = 0; j < cells.Length; j++)
394          values[j, i] = string.IsNullOrEmpty(cells[j]) ? string.Empty : cells[j];
395      }
396      return values;
397    }
398
399    private void dataGridView_ColumnHeaderMouseClick(object sender, DataGridViewCellMouseEventArgs e) {
400      if (Content != null) {
401        if (e.Button == MouseButtons.Left && Content.SortableView) {
402          bool addToSortedIndizes = (Control.ModifierKeys & Keys.Control) == Keys.Control;
403          SortOrder newSortOrder = SortOrder.Ascending;
404          if (sortedColumnIndizes.Any(x => x.Key == e.ColumnIndex)) {
405            SortOrder oldSortOrder = sortedColumnIndizes.Where(x => x.Key == e.ColumnIndex).First().Value;
406            int enumLength = Enum.GetValues(typeof(SortOrder)).Length;
407            newSortOrder = oldSortOrder = (SortOrder)Enum.Parse(typeof(SortOrder), ((((int)oldSortOrder) + 1) % enumLength).ToString());
408          }
409
410          if (!addToSortedIndizes)
411            sortedColumnIndizes.Clear();
412
413          if (sortedColumnIndizes.Any(x => x.Key == e.ColumnIndex)) {
414            int sortedIndex = sortedColumnIndizes.FindIndex(x => x.Key == e.ColumnIndex);
415            if (newSortOrder != SortOrder.None)
416              sortedColumnIndizes[sortedIndex] = new KeyValuePair<int, SortOrder>(e.ColumnIndex, newSortOrder);
417            else
418              sortedColumnIndizes.RemoveAt(sortedIndex);
419          } else
420            if (newSortOrder != SortOrder.None)
421              sortedColumnIndizes.Add(new KeyValuePair<int, SortOrder>(e.ColumnIndex, newSortOrder));
422          Sort();
423        }
424      }
425    }
426
427    protected virtual void ClearSorting() {
428      virtualRowIndizes = Enumerable.Range(0, Content.Rows).ToArray();
429      sortedColumnIndizes.Clear();
430      UpdateSortGlyph();
431    }
432
433    private void Sort() {
434      virtualRowIndizes = Sort(sortedColumnIndizes);
435      UpdateSortGlyph();
436      UpdateRowHeaders();
437      dataGridView.Invalidate();
438    }
439    protected virtual int[] Sort(IEnumerable<KeyValuePair<int, SortOrder>> sortedColumns) {
440      int[] newSortedIndex = Enumerable.Range(0, Content.Rows).ToArray();
441      if (sortedColumns.Count() != 0) {
442        rowComparer.SortedIndizes = sortedColumns;
443        rowComparer.Matrix = Content;
444        Array.Sort(newSortedIndex, rowComparer);
445      }
446      return newSortedIndex;
447    }
448    private void UpdateSortGlyph() {
449      foreach (DataGridViewColumn col in this.dataGridView.Columns)
450        col.HeaderCell.SortGlyphDirection = SortOrder.None;
451      foreach (KeyValuePair<int, SortOrder> p in sortedColumnIndizes)
452        this.dataGridView.Columns[p.Key].HeaderCell.SortGlyphDirection = p.Value;
453    }
454    #endregion
455
456    public class RowComparer : IComparer<int> {
457      public RowComparer() {
458      }
459
460      private List<KeyValuePair<int, SortOrder>> sortedIndizes;
461      public IEnumerable<KeyValuePair<int, SortOrder>> SortedIndizes {
462        get { return this.sortedIndizes; }
463        set { sortedIndizes = new List<KeyValuePair<int, SortOrder>>(value); }
464      }
465      private IStringConvertibleMatrix matrix;
466      public IStringConvertibleMatrix Matrix {
467        get { return this.matrix; }
468        set { this.matrix = value; }
469      }
470
471      public int Compare(int x, int y) {
472        int result = 0;
473        double double1, double2;
474        DateTime dateTime1, dateTime2;
475        TimeSpan timeSpan1, timeSpan2;
476        string string1, string2;
477
478        if (matrix == null)
479          throw new InvalidOperationException("Could not sort IStringConvertibleMatrix if the matrix member is null.");
480        if (sortedIndizes == null)
481          return 0;
482
483        foreach (KeyValuePair<int, SortOrder> pair in sortedIndizes.Where(p => p.Value != SortOrder.None)) {
484          string1 = matrix.GetValue(x, pair.Key);
485          string2 = matrix.GetValue(y, pair.Key);
486          if (double.TryParse(string1, out double1) && double.TryParse(string2, out double2))
487            result = double1.CompareTo(double2);
488          else if (DateTime.TryParse(string1, out dateTime1) && DateTime.TryParse(string2, out dateTime2))
489            result = dateTime1.CompareTo(dateTime2);
490          else if (TimeSpan.TryParse(string1, out timeSpan1) && TimeSpan.TryParse(string2, out timeSpan2))
491            result = timeSpan1.CompareTo(timeSpan2);
492          else {
493            if (string1 != null)
494              result = string1.CompareTo(string2);
495            else if (string2 != null)
496              result = string2.CompareTo(string1) * -1;
497          }
498          if (pair.Value == SortOrder.Descending)
499            result *= -1;
500          if (result != 0)
501            return result;
502        }
503        return result;
504      }
505    }
506
507    private void dataGridView_MouseClick(object sender, System.Windows.Forms.MouseEventArgs e) {
508      if (Content == null) return;
509      if (e.Button == MouseButtons.Right && Content.ColumnNames.Count() != 0)
510        contextMenu.Show(MousePosition);
511    }
512    private void ShowHideColumns_Click(object sender, EventArgs e) {
513      new ColumnsVisibilityDialog(this.dataGridView.Columns.Cast<DataGridViewColumn>()).ShowDialog();
514    }
515
516    private void UpdateVisibilityOfTextBoxes() {
517      rowsTextBox.Visible = columnsTextBox.Visible = showRowsAndColumnsTextBox;
518      rowsLabel.Visible = columnsLabel.Visible = showRowsAndColumnsTextBox;
519      UpdateDataGridViewSizeAndLocation();
520    }
521
522    private void UpdateVisibilityOfStatisticalInformation() {
523      statisticsTextBox.Visible = showStatisticalInformation;
524      UpdateDataGridViewSizeAndLocation();
525    }
526
527    private void UpdateDataGridViewSizeAndLocation() {
528      int headerSize = columnsTextBox.Location.Y + columnsTextBox.Size.Height +
529       columnsTextBox.Margin.Bottom + dataGridView.Margin.Top;
530
531      int offset = showRowsAndColumnsTextBox ? headerSize : 0;
532      dataGridView.Location = new Point(0, offset);
533
534      int statisticsTextBoxHeight = showStatisticalInformation ? statisticsTextBox.Height + statisticsTextBox.Margin.Top + statisticsTextBox.Margin.Bottom : 0;
535      dataGridView.Size = new Size(Size.Width, Size.Height - offset - statisticsTextBoxHeight);
536    }
537
538    private void dataGridView_SelectionChanged(object sender, EventArgs e) {
539      string stringFormat = "{0,20:0.0000}";
540      statisticsTextBox.Text = string.Empty;
541      if (dataGridView.SelectedCells.Count > 1) {
542        List<double> selectedValues = new List<double>();
543        foreach (DataGridViewCell cell in dataGridView.SelectedCells) {
544          double value;
545          if (!double.TryParse(cell.Value.ToString(), out value)) return;
546          selectedValues.Add(value);
547        }
548        if (selectedValues.Count > 1) {
549          StringBuilder labelText = new StringBuilder();
550          labelText.Append("Count: " + string.Format(stringFormat, selectedValues.Count) + "    ");
551          labelText.Append("Sum: " + string.Format(stringFormat, selectedValues.Sum()) + "    ");
552          labelText.Append("Min: " + string.Format(stringFormat, selectedValues.Min()) + "    ");
553          labelText.Append("Max: " + string.Format(stringFormat, selectedValues.Max()) + "    ");
554          labelText.Append("Average: " + string.Format(stringFormat, selectedValues.Average()) + "    ");
555          labelText.Append("Standard Deviation: " + string.Format(stringFormat, selectedValues.StandardDeviation()) + "    ");
556
557          statisticsTextBox.Text = labelText.ToString();
558        }
559      }
560    }
561  }
562}
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