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source: branches/symbreg-factors-2650/HeuristicLab.Analysis.Views/3.3/DataTableControl.cs @ 14498

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Last change on this file since 14498 was 14498, checked in by gkronber, 7 years ago
#2650: merged r14457:14494 from trunk to branch (resolving conflicts)
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
30	namespace HeuristicLab.Analysis.Views {
31	public partial class DataTableControl : UserControl {
32	protected List<Series> invisibleSeries;
33	protected Dictionary<IObservableList<double>, DataRow> valuesRowsTable;
34
35	private DataTable content;
36	public DataTable Content {
37	get { return content; }
38	set {
39	if (value == content) return;
40	if (content != null) DeregisterContentEvents();
41	content = value;
42	if (content != null) RegisterContentEvents();
43	OnContentChanged();
44	SetEnabledStateOfControls();
45	}
46	}
47
48	public DataTableControl() {
49	InitializeComponent();
50	valuesRowsTable = new Dictionary<IObservableList<double>, DataRow>();
51	invisibleSeries = new List<Series>();
52	chart.CustomizeAllChartAreas();
53	chart.ChartAreas[0].CursorX.Interval = 1;
54	chart.ContextMenuStrip.Items.Add(configureToolStripMenuItem);
55	}
56
57	#region Event Handler Registration
58	protected virtual void DeregisterContentEvents() {
59	foreach (DataRow row in Content.Rows)
60	DeregisterDataRowEvents(row);
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	protected virtual void RegisterContentEvents() {
68	Content.VisualPropertiesChanged += new EventHandler(Content_VisualPropertiesChanged);
69	Content.Rows.ItemsAdded += new CollectionItemsChangedEventHandler<DataRow>(Rows_ItemsAdded);
70	Content.Rows.ItemsRemoved += new CollectionItemsChangedEventHandler<DataRow>(Rows_ItemsRemoved);
71	Content.Rows.ItemsReplaced += new CollectionItemsChangedEventHandler<DataRow>(Rows_ItemsReplaced);
72	Content.Rows.CollectionReset += new CollectionItemsChangedEventHandler<DataRow>(Rows_CollectionReset);
73	}
74
75	protected virtual void RegisterDataRowEvents(DataRow row) {
76	row.NameChanged += new EventHandler(Row_NameChanged);
77	row.VisualPropertiesChanged += new EventHandler(Row_VisualPropertiesChanged);
78	valuesRowsTable.Add(row.Values, 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	}
85	protected virtual void DeregisterDataRowEvents(DataRow row) {
86	row.Values.ItemsAdded -= new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_ItemsAdded);
87	row.Values.ItemsRemoved -= new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_ItemsRemoved);
88	row.Values.ItemsReplaced -= new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_ItemsReplaced);
89	row.Values.ItemsMoved -= new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_ItemsMoved);
90	row.Values.CollectionReset -= new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_CollectionReset);
91	valuesRowsTable.Remove(row.Values);
92	row.VisualPropertiesChanged -= new EventHandler(Row_VisualPropertiesChanged);
93	row.NameChanged -= new EventHandler(Row_NameChanged);
94	}
95	#endregion
96
97	protected virtual void OnContentChanged() {
98	invisibleSeries.Clear();
99	chart.Titles[0].Text = string.Empty;
100	chart.ChartAreas[0].AxisX.Title = string.Empty;
101	chart.ChartAreas[0].AxisY.Title = string.Empty;
102	chart.ChartAreas[0].AxisY2.Title = string.Empty;
103	chart.Series.Clear();
104	if (Content != null) {
105	chart.Titles[0].Text = Content.Name;
106	chart.Titles[0].Visible = !string.IsNullOrEmpty(Content.Name);
107	AddDataRows(Content.Rows);
108	ConfigureChartArea(chart.ChartAreas[0]);
109	RecalculateAxesScale(chart.ChartAreas[0]);
110	}
111	}
112
113	protected virtual void 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.StackedColumn;
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	private void Content_VisualPropertiesChanged(object sender, EventArgs e) {
287	if (InvokeRequired)
288	Invoke(new EventHandler(Content_VisualPropertiesChanged), sender, e);
289	else {
290	ConfigureChartArea(chart.ChartAreas[0]);
291	RecalculateAxesScale(chart.ChartAreas[0]); // axes min/max could have changed
292	}
293	}
294	#endregion
295	#region Rows Event Handlers
296	private void Rows_ItemsAdded(object sender, CollectionItemsChangedEventArgs<DataRow> e) {
297	if (InvokeRequired)
298	Invoke(new CollectionItemsChangedEventHandler<DataRow>(Rows_ItemsAdded), sender, e);
299	else {
300	AddDataRows(e.Items);
301	}
302	}
303	private void Rows_ItemsRemoved(object sender, CollectionItemsChangedEventArgs<DataRow> e) {
304	if (InvokeRequired)
305	Invoke(new CollectionItemsChangedEventHandler<DataRow>(Rows_ItemsRemoved), sender, e);
306	else {
307	RemoveDataRows(e.Items);
308	}
309	}
310	private void Rows_ItemsReplaced(object sender, CollectionItemsChangedEventArgs<DataRow> e) {
311	if (InvokeRequired)
312	Invoke(new CollectionItemsChangedEventHandler<DataRow>(Rows_ItemsReplaced), sender, e);
313	else {
314	RemoveDataRows(e.OldItems);
315	AddDataRows(e.Items);
316	}
317	}
318	private void Rows_CollectionReset(object sender, CollectionItemsChangedEventArgs<DataRow> e) {
319	if (InvokeRequired)
320	Invoke(new CollectionItemsChangedEventHandler<DataRow>(Rows_CollectionReset), sender, e);
321	else {
322	RemoveDataRows(e.OldItems);
323	AddDataRows(e.Items);
324	}
325	}
326	#endregion
327	#region Row Event Handlers
328	private void Row_VisualPropertiesChanged(object sender, EventArgs e) {
329	if (InvokeRequired)
330	Invoke(new EventHandler(Row_VisualPropertiesChanged), sender, e);
331	else {
332	DataRow row = (DataRow)sender;
333	Series series = chart.Series[row.Name];
334	series.Points.Clear();
335	ConfigureSeries(series, row);
336	FillSeriesWithRowValues(series, row);
337	RecalculateAxesScale(chart.ChartAreas[0]);
338	}
339	}
340	private void Row_NameChanged(object sender, EventArgs e) {
341	if (InvokeRequired)
342	Invoke(new EventHandler(Row_NameChanged), sender, e);
343	else {
344	DataRow row = (DataRow)sender;
345	chart.Series[row.Name].Name = row.Name;
346	}
347	}
348	#endregion
349	#region Values Event Handlers
350	private void Values_ItemsAdded(object sender, CollectionItemsChangedEventArgs<IndexedItem<double>> e) {
351	if (InvokeRequired)
352	Invoke(new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_ItemsAdded), sender, e);
353	else {
354	DataRow row = null;
355	valuesRowsTable.TryGetValue((IObservableList<double>)sender, out row);
356	if (row != null) {
357	Series rowSeries = chart.Series[row.Name];
358	if (!invisibleSeries.Contains(rowSeries)) {
359	rowSeries.Points.Clear();
360	FillSeriesWithRowValues(rowSeries, row);
361	RecalculateAxesScale(chart.ChartAreas[0]);
362	UpdateYCursorInterval();
363	}
364	}
365	}
366	}
367	private void Values_ItemsRemoved(object sender, CollectionItemsChangedEventArgs<IndexedItem<double>> e) {
368	if (InvokeRequired)
369	Invoke(new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_ItemsRemoved), sender, e);
370	else {
371	DataRow row = null;
372	valuesRowsTable.TryGetValue((IObservableList<double>)sender, out row);
373	if (row != null) {
374	Series rowSeries = chart.Series[row.Name];
375	if (!invisibleSeries.Contains(rowSeries)) {
376	rowSeries.Points.Clear();
377	FillSeriesWithRowValues(rowSeries, row);
378	RecalculateAxesScale(chart.ChartAreas[0]);
379	UpdateYCursorInterval();
380	}
381	}
382	}
383	}
384	private void Values_ItemsReplaced(object sender, CollectionItemsChangedEventArgs<IndexedItem<double>> e) {
385	if (InvokeRequired)
386	Invoke(new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_ItemsReplaced), sender, e);
387	else {
388	DataRow row = null;
389	valuesRowsTable.TryGetValue((IObservableList<double>)sender, out row);
390	if (row != null) {
391	Series rowSeries = chart.Series[row.Name];
392	if (!invisibleSeries.Contains(rowSeries)) {
393	if (row.VisualProperties.ChartType == DataRowVisualProperties.DataRowChartType.Histogram) {
394	rowSeries.Points.Clear();
395	FillSeriesWithRowValues(rowSeries, row);
396	} else {
397	foreach (IndexedItem<double> item in e.Items) {
398	if (IsInvalidValue(item.Value))
399	rowSeries.Points[item.Index].IsEmpty = true;
400	else {
401	rowSeries.Points[item.Index].YValues = new double[] { item.Value };
402	rowSeries.Points[item.Index].IsEmpty = false;
403	}
404	}
405	}
406	RecalculateAxesScale(chart.ChartAreas[0]);
407	UpdateYCursorInterval();
408	}
409	}
410	}
411	}
412	private void Values_ItemsMoved(object sender, CollectionItemsChangedEventArgs<IndexedItem<double>> e) {
413	if (InvokeRequired)
414	Invoke(new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_ItemsMoved), sender, e);
415	else {
416	DataRow row = null;
417	valuesRowsTable.TryGetValue((IObservableList<double>)sender, out row);
418	if (row != null) {
419	Series rowSeries = chart.Series[row.Name];
420	if (!invisibleSeries.Contains(rowSeries)) {
421	rowSeries.Points.Clear();
422	FillSeriesWithRowValues(rowSeries, row);
423	RecalculateAxesScale(chart.ChartAreas[0]);
424	UpdateYCursorInterval();
425	}
426	}
427	}
428	}
429
430	private void Values_CollectionReset(object sender, CollectionItemsChangedEventArgs<IndexedItem<double>> e) {
431	if (InvokeRequired)
432	Invoke(new CollectionItemsChangedEventHandler<IndexedItem<double>>(Values_CollectionReset), sender, e);
433	else {
434	DataRow row = null;
435	valuesRowsTable.TryGetValue((IObservableList<double>)sender, out row);
436	if (row != null) {
437	Series rowSeries = chart.Series[row.Name];
438	if (!invisibleSeries.Contains(rowSeries)) {
439	rowSeries.Points.Clear();
440	FillSeriesWithRowValues(rowSeries, row);
441	RecalculateAxesScale(chart.ChartAreas[0]);
442	UpdateYCursorInterval();
443	}
444	}
445	}
446	}
447	#endregion
448	private void configureToolStripMenuItem_Click(object sender, EventArgs e) {
449	ShowConfiguration();
450	}
451	#endregion
452
453	#region Chart Event Handlers
454	private void chart_MouseDown(object sender, MouseEventArgs e) {
455	HitTestResult result = chart.HitTest(e.X, e.Y);
456	if (result.ChartElementType == ChartElementType.LegendItem) {
457	ToggleSeriesVisible(result.Series);
458	}
459	}
460	private void chart_MouseMove(object sender, MouseEventArgs e) {
461	HitTestResult result = chart.HitTest(e.X, e.Y);
462	if (result.ChartElementType == ChartElementType.LegendItem)
463	this.Cursor = Cursors.Hand;
464	else
465	this.Cursor = Cursors.Default;
466	}
467	private void chart_CustomizeLegend(object sender, CustomizeLegendEventArgs e) {
468	foreach (LegendItem legendItem in e.LegendItems) {
469	var series = chart.Series[legendItem.SeriesName];
470	if (series != null) {
471	bool seriesIsInvisible = invisibleSeries.Contains(series);
472	foreach (LegendCell cell in legendItem.Cells) {
473	cell.ForeColor = seriesIsInvisible ? Color.Gray : Color.Black;
474	}
475	}
476	}
477	}
478	#endregion
479
480	private void ToggleSeriesVisible(Series series) {
481	if (!invisibleSeries.Contains(series)) {
482	series.Points.Clear();
483	invisibleSeries.Add(series);
484	} else {
485	invisibleSeries.Remove(series);
486	if (Content != null) {
487
488	var row = (from r in Content.Rows
489	where r.Name == series.Name
490	select r).Single();
491	FillSeriesWithRowValues(series, row);
492	this.chart.Legends[series.Legend].ForeColor = Color.Black;
493	RecalculateAxesScale(chart.ChartAreas[0]);
494	UpdateYCursorInterval();
495	}
496	}
497	}
498
499	private void FillSeriesWithRowValues(Series series, DataRow row) {
500	switch (row.VisualProperties.ChartType) {
501	case DataRowVisualProperties.DataRowChartType.Histogram:
502	// when a single histogram is updated, all histograms must be updated. otherwise the value ranges and bin sizes may not be equal.
503	var histograms = Content.Rows
504	.Where(r => r.VisualProperties.ChartType == DataRowVisualProperties.DataRowChartType.Histogram)
505	.ToList();
506	CalculateHistogram(series, row, histograms);
507	foreach (var h in from r in histograms
508	where r != row
509	let s = chart.Series.FindByName(r.Name)
510	where s != null
511	where !invisibleSeries.Contains(s)
512	select new { row = r, series = s }) {
513	h.series.Points.Clear();
514	CalculateHistogram(h.series, h.row, histograms);
515	}
516	break;
517	default: {
518	bool yLogarithmic = series.YAxisType == AxisType.Primary
519	? Content.VisualProperties.YAxisLogScale
520	: Content.VisualProperties.SecondYAxisLogScale;
521	bool xLogarithmic = series.XAxisType == AxisType.Primary
522	? Content.VisualProperties.XAxisLogScale
523	: Content.VisualProperties.SecondXAxisLogScale;
524	for (int i = 0; i < row.Values.Count; i++) {
525	var value = row.Values[i];
526	var point = new DataPoint();
527	point.XValue = row.VisualProperties.StartIndexZero && !xLogarithmic ? i : i + 1;
528	if (IsInvalidValue(value) \|\| (yLogarithmic && value <= 0))
529	point.IsEmpty = true;
530	else
531	point.YValues = new double[] { value };
532	series.Points.Add(point);
533	}
534	}
535	break;
536	}
537	}
538
539	protected virtual void CalculateHistogram(Series series, DataRow row, IEnumerable<DataRow> histogramRows) {
540	series.Points.Clear();
541	if (!row.Values.Any()) return;
542
543	int bins = histogramRows.Max(r => r.VisualProperties.Bins);
544	decimal minValue = (decimal)histogramRows.Min(r => r.Values.Min());
545	decimal maxValue = (decimal)histogramRows.Max(r => r.Values.Max());
546	decimal intervalWidth = (maxValue - minValue) / bins;
547	if (intervalWidth < 0) return;
548	if (intervalWidth == 0) {
549	series.Points.AddXY(minValue, row.Values.Count);
550	return;
551	}
552
553	if (!histogramRows.Any(r => r.VisualProperties.ExactBins)) {
554	intervalWidth = (decimal)HumanRoundRange((double)intervalWidth);
555	minValue = Math.Floor(minValue / intervalWidth) * intervalWidth;
556	maxValue = Math.Ceiling(maxValue / intervalWidth) * intervalWidth;
557	}
558
559	decimal intervalCenter = intervalWidth / 2;
560
561	decimal min = 0.0m, max = 0.0m;
562	if (!Double.IsNaN(Content.VisualProperties.XAxisMinimumFixedValue) && !Content.VisualProperties.XAxisMinimumAuto)
563	min = (decimal)Content.VisualProperties.XAxisMinimumFixedValue;
564	else min = minValue;
565	if (!Double.IsNaN(Content.VisualProperties.XAxisMaximumFixedValue) && !Content.VisualProperties.XAxisMaximumAuto)
566	max = (decimal)Content.VisualProperties.XAxisMaximumFixedValue;
567	else max = maxValue + intervalWidth;
568
569	double axisInterval = (double)intervalWidth / row.VisualProperties.ScaleFactor;
570
571	var area = chart.ChartAreas[0];
572	area.AxisX.Interval = axisInterval;
573
574	series.SetCustomProperty("PointWidth", "1"); // 0.8 is the default value
575
576	// get the range or intervals which define the grouping of the frequency values
577	var range = Range(min, max, intervalWidth).Skip(1).ToList();
578
579	// aggregate the row values by unique key and frequency value
580	var valueFrequencies = (from v in row.Values
581	where !IsInvalidValue(v)
582	orderby v
583	group v by v into g
584	select new Tuple<double, double>(g.First(), g.Count())).ToList();
585
586	// ensure that each column is displayed completely on the chart by adding two dummy datapoints on the upper and lower range
587	series.Points.Add(new DataPoint((double)(min - intervalWidth), 0));
588	series.Points.Add(new DataPoint((double)(max + intervalWidth), 0));
589
590	// add data points
591	int j = 0;
592	foreach (var d in range) {
593	double sum = 0.0;
594	// sum the frequency values that fall within the same interval
595	while (j < valueFrequencies.Count && (decimal)valueFrequencies[j].Item1 < d) {
596	sum += valueFrequencies[j].Item2;
597	++j;
598	}
599	string xAxisTitle = string.IsNullOrEmpty(Content.VisualProperties.XAxisTitle)
600	? "X"
601	: Content.VisualProperties.XAxisTitle;
602	string yAxisTitle = string.IsNullOrEmpty(Content.VisualProperties.YAxisTitle)
603	? "Y"
604	: Content.VisualProperties.YAxisTitle;
605	series.Points.Add(new DataPoint((double)(d - intervalCenter), sum) {
606	ToolTip =
607	xAxisTitle + ": [" + (d - intervalWidth) + "-" + d + ")" + Environment.NewLine +
608	yAxisTitle + ": " + sum
609	});
610	}
611	}
612
613	#region Helpers
614	public static IEnumerable<decimal> Range(decimal min, decimal max, decimal step) {
615	decimal i;
616	for (i = min; i <= max; i += step)
617	yield return i;
618
619	if (i != max + step)
620	yield return i;
621	}
622
623	protected void RemoveCustomPropertyIfExists(Series series, string property) {
624	if (series.IsCustomPropertySet(property)) series.DeleteCustomProperty(property);
625	}
626
627	private double HumanRoundRange(double range) {
628	double base10 = Math.Pow(10.0, Math.Floor(Math.Log10(range)));
629	double rounding = range / base10;
630	if (rounding <= 1.5) rounding = 1;
631	else if (rounding <= 2.25) rounding = 2;
632	else if (rounding <= 3.75) rounding = 2.5;
633	else if (rounding <= 7.5) rounding = 5;
634	else rounding = 10;
635	return rounding * base10;
636	}
637
638	private double HumanRoundMax(double max) {
639	double base10;
640	if (max > 0) base10 = Math.Pow(10.0, Math.Floor(Math.Log10(max)));
641	else base10 = Math.Pow(10.0, Math.Ceiling(Math.Log10(-max)));
642	double rounding = (max > 0) ? base10 : -base10;
643	while (rounding < max) rounding += base10;
644	return rounding;
645	}
646
647	private ChartDashStyle ConvertLineStyle(DataRowVisualProperties.DataRowLineStyle dataRowLineStyle) {
648	switch (dataRowLineStyle) {
649	case DataRowVisualProperties.DataRowLineStyle.Dash:
650	return ChartDashStyle.Dash;
651	case DataRowVisualProperties.DataRowLineStyle.DashDot:
652	return ChartDashStyle.DashDot;
653	case DataRowVisualProperties.DataRowLineStyle.DashDotDot:
654	return ChartDashStyle.DashDotDot;
655	case DataRowVisualProperties.DataRowLineStyle.Dot:
656	return ChartDashStyle.Dot;
657	case DataRowVisualProperties.DataRowLineStyle.NotSet:
658	return ChartDashStyle.NotSet;
659	case DataRowVisualProperties.DataRowLineStyle.Solid:
660	return ChartDashStyle.Solid;
661	default:
662	return ChartDashStyle.NotSet;
663	}
664	}
665
666	protected static bool IsInvalidValue(double x) {
667	return double.IsNaN(x) \|\| x < (double)decimal.MinValue \|\| x > (double)decimal.MaxValue;
668	}
669	#endregion
670	}
671	}

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