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source: branches/symbreg-factors-2650/HeuristicLab.Analysis.Views/3.3/DataTableControl.cs @ 14559

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Last change on this file since 14559 was 14542, checked in by gkronber, 8 years ago
#2650: merged r14504:14533 from trunk to branch
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
22	using System;
23	using System.Collections.Generic;
24	using System.Drawing;
25	using System.Linq;
26	using System.Windows.Forms;
27	using System.Windows.Forms.DataVisualization.Charting;
28	using HeuristicLab.Collections;
29	using HeuristicLab.MainForm.WindowsForms;
30
31	namespace 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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