#region License Information
/* HeuristicLab
* Copyright (C) 2002-2018 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
*
* This file is part of HeuristicLab.
*
* HeuristicLab is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* HeuristicLab is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with HeuristicLab. If not, see .
*/
#endregion
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Windows.Forms;
using System.Windows.Forms.DataVisualization.Charting;
using HeuristicLab.Collections;
using HeuristicLab.Core.Views;
using HeuristicLab.MainForm;
namespace HeuristicLab.Analysis.Views {
[View("DataTable View")]
[Content(typeof(DataTable), true)]
public partial class DataTableView : NamedItemView, IConfigureableView {
protected List invisibleSeries;
protected Dictionary, DataRow> valuesRowsTable;
protected bool showChartOnly = false;
public new DataTable Content {
get { return (DataTable)base.Content; }
set { base.Content = value; }
}
public bool ShowChartOnly {
get { return showChartOnly; }
set {
if (showChartOnly != value) {
showChartOnly = value;
UpdateControlsVisibility();
}
}
}
public DataTableView() {
InitializeComponent();
valuesRowsTable = new Dictionary, DataRow>();
invisibleSeries = new List();
chart.CustomizeAllChartAreas();
chart.ChartAreas[0].CursorX.Interval = 1;
chart.ContextMenuStrip.Items.Add(configureToolStripMenuItem);
}
#region Event Handler Registration
protected override void DeregisterContentEvents() {
foreach (DataRow row in Content.Rows)
DeregisterDataRowEvents(row);
Content.VisualPropertiesChanged -= new EventHandler(Content_VisualPropertiesChanged);
Content.Rows.ItemsAdded -= new CollectionItemsChangedEventHandler(Rows_ItemsAdded);
Content.Rows.ItemsRemoved -= new CollectionItemsChangedEventHandler(Rows_ItemsRemoved);
Content.Rows.ItemsReplaced -= new CollectionItemsChangedEventHandler(Rows_ItemsReplaced);
Content.Rows.CollectionReset -= new CollectionItemsChangedEventHandler(Rows_CollectionReset);
base.DeregisterContentEvents();
}
protected override void RegisterContentEvents() {
base.RegisterContentEvents();
Content.VisualPropertiesChanged += new EventHandler(Content_VisualPropertiesChanged);
Content.Rows.ItemsAdded += new CollectionItemsChangedEventHandler(Rows_ItemsAdded);
Content.Rows.ItemsRemoved += new CollectionItemsChangedEventHandler(Rows_ItemsRemoved);
Content.Rows.ItemsReplaced += new CollectionItemsChangedEventHandler(Rows_ItemsReplaced);
Content.Rows.CollectionReset += new CollectionItemsChangedEventHandler(Rows_CollectionReset);
}
protected virtual void RegisterDataRowEvents(DataRow row) {
row.NameChanged += new EventHandler(Row_NameChanged);
row.VisualPropertiesChanged += new EventHandler(Row_VisualPropertiesChanged);
valuesRowsTable.Add(row.Values, row);
row.Values.ItemsAdded += new CollectionItemsChangedEventHandler>(Values_ItemsAdded);
row.Values.ItemsRemoved += new CollectionItemsChangedEventHandler>(Values_ItemsRemoved);
row.Values.ItemsReplaced += new CollectionItemsChangedEventHandler>(Values_ItemsReplaced);
row.Values.ItemsMoved += new CollectionItemsChangedEventHandler>(Values_ItemsMoved);
row.Values.CollectionReset += new CollectionItemsChangedEventHandler>(Values_CollectionReset);
}
protected virtual void DeregisterDataRowEvents(DataRow row) {
row.Values.ItemsAdded -= new CollectionItemsChangedEventHandler>(Values_ItemsAdded);
row.Values.ItemsRemoved -= new CollectionItemsChangedEventHandler>(Values_ItemsRemoved);
row.Values.ItemsReplaced -= new CollectionItemsChangedEventHandler>(Values_ItemsReplaced);
row.Values.ItemsMoved -= new CollectionItemsChangedEventHandler>(Values_ItemsMoved);
row.Values.CollectionReset -= new CollectionItemsChangedEventHandler>(Values_CollectionReset);
valuesRowsTable.Remove(row.Values);
row.VisualPropertiesChanged -= new EventHandler(Row_VisualPropertiesChanged);
row.NameChanged -= new EventHandler(Row_NameChanged);
}
#endregion
protected override void OnContentChanged() {
base.OnContentChanged();
invisibleSeries.Clear();
chart.Titles[0].Text = string.Empty;
chart.ChartAreas[0].AxisX.Title = string.Empty;
chart.ChartAreas[0].AxisY.Title = string.Empty;
chart.ChartAreas[0].AxisY2.Title = string.Empty;
chart.Series.Clear();
if (Content != null) {
chart.Titles[0].Text = Content.Name;
chart.Titles[0].Visible = !string.IsNullOrEmpty(Content.Name);
AddDataRows(Content.Rows);
ConfigureChartArea(chart.ChartAreas[0]);
RecalculateAxesScale(chart.ChartAreas[0]);
}
}
protected override void SetEnabledStateOfControls() {
base.SetEnabledStateOfControls();
chart.Enabled = Content != null;
}
public void ShowConfiguration() {
if (Content != null) {
using (var dialog = new DataTableVisualPropertiesDialog(Content)) {
dialog.ShowDialog(this);
}
} else MessageBox.Show("Nothing to configure.");
}
protected void UpdateControlsVisibility() {
if (InvokeRequired)
Invoke(new Action(UpdateControlsVisibility));
else {
foreach (Control c in Controls) {
if (c == chart) continue;
c.Visible = !showChartOnly;
}
chart.Dock = showChartOnly ? DockStyle.Fill : DockStyle.None;
}
}
protected virtual void AddDataRows(IEnumerable rows) {
foreach (var row in rows) {
RegisterDataRowEvents(row);
var series = new Series(row.Name) {
Tag = row
};
if (row.VisualProperties.DisplayName.Trim() != String.Empty) series.LegendText = row.VisualProperties.DisplayName;
else series.LegendText = row.Name;
ConfigureSeries(series, row);
FillSeriesWithRowValues(series, row);
chart.Series.Add(series);
}
ConfigureChartArea(chart.ChartAreas[0]);
RecalculateAxesScale(chart.ChartAreas[0]);
UpdateYCursorInterval();
UpdateHistogramTransparency();
}
protected virtual void RemoveDataRows(IEnumerable rows) {
foreach (var row in rows) {
DeregisterDataRowEvents(row);
Series series = chart.Series[row.Name];
chart.Series.Remove(series);
if (invisibleSeries.Contains(series))
invisibleSeries.Remove(series);
}
RecalculateAxesScale(chart.ChartAreas[0]);
}
private void ConfigureSeries(Series series, DataRow row) {
RemoveCustomPropertyIfExists(series, "PointWidth");
series.BorderWidth = 1;
series.BorderDashStyle = ChartDashStyle.Solid;
series.BorderColor = Color.Empty;
if (row.VisualProperties.Color != Color.Empty)
series.Color = row.VisualProperties.Color;
else series.Color = Color.Empty;
series.IsVisibleInLegend = row.VisualProperties.IsVisibleInLegend;
switch (row.VisualProperties.ChartType) {
case DataRowVisualProperties.DataRowChartType.Line:
series.ChartType = SeriesChartType.FastLine;
series.BorderWidth = row.VisualProperties.LineWidth;
series.BorderDashStyle = ConvertLineStyle(row.VisualProperties.LineStyle);
break;
case DataRowVisualProperties.DataRowChartType.Bars:
// Bar is incompatible with anything but Bar and StackedBar*
if (!chart.Series.Any(x => x.ChartType != SeriesChartType.Bar && x.ChartType != SeriesChartType.StackedBar && x.ChartType != SeriesChartType.StackedBar100))
series.ChartType = SeriesChartType.Bar;
else {
series.ChartType = SeriesChartType.FastPoint; //default
row.VisualProperties.ChartType = DataRowVisualProperties.DataRowChartType.Points;
}
break;
case DataRowVisualProperties.DataRowChartType.Columns:
series.ChartType = SeriesChartType.Column;
break;
case DataRowVisualProperties.DataRowChartType.Points:
series.ChartType = SeriesChartType.FastPoint;
break;
case DataRowVisualProperties.DataRowChartType.Histogram:
bool stacked = Content.VisualProperties.HistogramAggregation == DataTableVisualProperties.DataTableHistogramAggregation.Stacked;
series.ChartType = stacked ? SeriesChartType.StackedColumn : SeriesChartType.Column;
bool sideBySide = Content.VisualProperties.HistogramAggregation == DataTableVisualProperties.DataTableHistogramAggregation.SideBySide;
series.SetCustomProperty("DrawSideBySide", sideBySide ? "True" : "False");
series.SetCustomProperty("PointWidth", "1");
if (!series.Color.IsEmpty && series.Color.GetBrightness() < 0.25)
series.BorderColor = Color.White;
else series.BorderColor = Color.Black;
break;
case DataRowVisualProperties.DataRowChartType.StepLine:
series.ChartType = SeriesChartType.StepLine;
series.BorderWidth = row.VisualProperties.LineWidth;
series.BorderDashStyle = ConvertLineStyle(row.VisualProperties.LineStyle);
break;
default:
series.ChartType = SeriesChartType.FastPoint;
break;
}
series.YAxisType = row.VisualProperties.SecondYAxis ? AxisType.Secondary : AxisType.Primary;
series.XAxisType = row.VisualProperties.SecondXAxis ? AxisType.Secondary : AxisType.Primary;
if (row.VisualProperties.DisplayName.Trim() != String.Empty) series.LegendText = row.VisualProperties.DisplayName;
else series.LegendText = row.Name;
string xAxisTitle = string.IsNullOrEmpty(Content.VisualProperties.XAxisTitle)
? "X"
: Content.VisualProperties.XAxisTitle;
string yAxisTitle = string.IsNullOrEmpty(Content.VisualProperties.YAxisTitle)
? "Y"
: Content.VisualProperties.YAxisTitle;
series.ToolTip =
series.LegendText + Environment.NewLine +
xAxisTitle + " = " + "#INDEX," + Environment.NewLine +
yAxisTitle + " = " + "#VAL";
}
private void ConfigureChartArea(ChartArea area) {
if (Content.VisualProperties.TitleFont != null) chart.Titles[0].Font = Content.VisualProperties.TitleFont;
if (!Content.VisualProperties.TitleColor.IsEmpty) chart.Titles[0].ForeColor = Content.VisualProperties.TitleColor;
chart.Titles[0].Text = Content.VisualProperties.Title;
chart.Titles[0].Visible = !string.IsNullOrEmpty(Content.VisualProperties.Title);
if (Content.VisualProperties.AxisTitleFont != null) area.AxisX.TitleFont = Content.VisualProperties.AxisTitleFont;
if (!Content.VisualProperties.AxisTitleColor.IsEmpty) area.AxisX.TitleForeColor = Content.VisualProperties.AxisTitleColor;
area.AxisX.Title = Content.VisualProperties.XAxisTitle;
if (Content.VisualProperties.AxisTitleFont != null) area.AxisX2.TitleFont = Content.VisualProperties.AxisTitleFont;
if (!Content.VisualProperties.AxisTitleColor.IsEmpty) area.AxisX2.TitleForeColor = Content.VisualProperties.AxisTitleColor;
area.AxisX2.Title = Content.VisualProperties.SecondXAxisTitle;
if (Content.VisualProperties.AxisTitleFont != null) area.AxisY.TitleFont = Content.VisualProperties.AxisTitleFont;
if (!Content.VisualProperties.AxisTitleColor.IsEmpty) area.AxisY.TitleForeColor = Content.VisualProperties.AxisTitleColor;
area.AxisY.Title = Content.VisualProperties.YAxisTitle;
if (Content.VisualProperties.AxisTitleFont != null) area.AxisY2.TitleFont = Content.VisualProperties.AxisTitleFont;
if (!Content.VisualProperties.AxisTitleColor.IsEmpty) area.AxisY2.TitleForeColor = Content.VisualProperties.AxisTitleColor;
area.AxisY2.Title = Content.VisualProperties.SecondYAxisTitle;
area.AxisX.IsLogarithmic = Content.VisualProperties.XAxisLogScale;
area.AxisX2.IsLogarithmic = Content.VisualProperties.SecondXAxisLogScale;
area.AxisY.IsLogarithmic = Content.VisualProperties.YAxisLogScale;
area.AxisY2.IsLogarithmic = Content.VisualProperties.SecondYAxisLogScale;
}
private void RecalculateAxesScale(ChartArea area) {
// Reset the axes bounds so that RecalculateAxesScale() will assign new bounds
foreach (Axis a in area.Axes) {
a.Minimum = double.NaN;
a.Maximum = double.NaN;
}
area.RecalculateAxesScale();
area.AxisX.IsMarginVisible = false;
area.AxisX2.IsMarginVisible = false;
if (!Content.VisualProperties.XAxisMinimumAuto && !double.IsNaN(Content.VisualProperties.XAxisMinimumFixedValue)) area.AxisX.Minimum = Content.VisualProperties.XAxisMinimumFixedValue;
if (!Content.VisualProperties.XAxisMaximumAuto && !double.IsNaN(Content.VisualProperties.XAxisMaximumFixedValue)) area.AxisX.Maximum = Content.VisualProperties.XAxisMaximumFixedValue;
if (!Content.VisualProperties.SecondXAxisMinimumAuto && !double.IsNaN(Content.VisualProperties.SecondXAxisMinimumFixedValue)) area.AxisX2.Minimum = Content.VisualProperties.SecondXAxisMinimumFixedValue;
if (!Content.VisualProperties.SecondXAxisMaximumAuto && !double.IsNaN(Content.VisualProperties.SecondXAxisMaximumFixedValue)) area.AxisX2.Maximum = Content.VisualProperties.SecondXAxisMaximumFixedValue;
if (!Content.VisualProperties.YAxisMinimumAuto && !double.IsNaN(Content.VisualProperties.YAxisMinimumFixedValue)) area.AxisY.Minimum = Content.VisualProperties.YAxisMinimumFixedValue;
if (!Content.VisualProperties.YAxisMaximumAuto && !double.IsNaN(Content.VisualProperties.YAxisMaximumFixedValue)) area.AxisY.Maximum = Content.VisualProperties.YAxisMaximumFixedValue;
if (!Content.VisualProperties.SecondYAxisMinimumAuto && !double.IsNaN(Content.VisualProperties.SecondYAxisMinimumFixedValue)) area.AxisY2.Minimum = Content.VisualProperties.SecondYAxisMinimumFixedValue;
if (!Content.VisualProperties.SecondYAxisMaximumAuto && !double.IsNaN(Content.VisualProperties.SecondYAxisMaximumFixedValue)) area.AxisY2.Maximum = Content.VisualProperties.SecondYAxisMaximumFixedValue;
if (area.AxisX.Minimum >= area.AxisX.Maximum) area.AxisX.Maximum = area.AxisX.Minimum + 1;
if (area.AxisX2.Minimum >= area.AxisX2.Maximum) area.AxisX2.Maximum = area.AxisX2.Minimum + 1;
if (area.AxisY.Minimum >= area.AxisY.Maximum) area.AxisY.Maximum = area.AxisY.Minimum + 1;
if (area.AxisY2.Minimum >= area.AxisY2.Maximum) area.AxisY2.Maximum = area.AxisY2.Minimum + 1;
}
protected virtual void UpdateYCursorInterval() {
double interestingValuesRange = (
from series in chart.Series
where series.Enabled
let values = (from point in series.Points
where !point.IsEmpty
select point.YValues[0]).DefaultIfEmpty(1.0)
let range = values.Max() - values.Min()
where range > 0.0
select range
).DefaultIfEmpty(1.0).Min();
double digits = (int)Math.Log10(interestingValuesRange) - 3;
double yZoomInterval = Math.Pow(10, digits);
this.chart.ChartAreas[0].CursorY.Interval = yZoomInterval;
}
protected void UpdateHistogramTransparency() {
if (Content.Rows.Any(r => RequiresTransparency(r) && r.VisualProperties.Color.IsEmpty)) {
foreach (var series in chart.Series) // sync colors before applying palette colors
series.Color = ((DataRow)series.Tag).VisualProperties.Color;
chart.ApplyPaletteColors();
}
var numTransparent = Content.Rows.Count(RequiresTransparency);
if (numTransparent <= 1) return;
foreach (var series in chart.Series) {
var row = (DataRow)series.Tag;
if (!RequiresTransparency(row))
continue;
var baseColor = row.VisualProperties.Color;
if (baseColor.IsEmpty) baseColor = series.Color;
series.Color = Color.FromArgb(180, baseColor);
}
}
private bool RequiresTransparency(DataRow row) {
return row.VisualProperties.ChartType == DataRowVisualProperties.DataRowChartType.Histogram
&& Content.VisualProperties.HistogramAggregation == DataTableVisualProperties.DataTableHistogramAggregation.Overlapping;
}
#region Event Handlers
#region Content Event Handlers
protected override void Content_NameChanged(object sender, EventArgs e) {
if (InvokeRequired)
Invoke(new EventHandler(Content_NameChanged), sender, e);
else {
Content.VisualProperties.Title = Content.Name;
base.Content_NameChanged(sender, e);
}
}
private void Content_VisualPropertiesChanged(object sender, EventArgs e) {
if (InvokeRequired)
Invoke(new EventHandler(Content_VisualPropertiesChanged), sender, e);
else {
ConfigureChartArea(chart.ChartAreas[0]);
RecalculateAxesScale(chart.ChartAreas[0]); // axes min/max could have changed
chart.Update(); // side-by-side and stacked histograms are not always correctly displayed without an update
// (chart update is required before the series are updated, otherwise the widths of the bars are updated incorrectly)
foreach (var row in Content.Rows.Where(r => r.VisualProperties.ChartType == DataRowVisualProperties.DataRowChartType.Histogram))
Row_VisualPropertiesChanged(row, EventArgs.Empty); // Histogram properties could have changed
}
}
#endregion
#region Rows Event Handlers
private void Rows_ItemsAdded(object sender, CollectionItemsChangedEventArgs e) {
if (InvokeRequired)
Invoke(new CollectionItemsChangedEventHandler(Rows_ItemsAdded), sender, e);
else {
AddDataRows(e.Items);
}
}
private void Rows_ItemsRemoved(object sender, CollectionItemsChangedEventArgs e) {
if (InvokeRequired)
Invoke(new CollectionItemsChangedEventHandler(Rows_ItemsRemoved), sender, e);
else {
RemoveDataRows(e.Items);
}
}
private void Rows_ItemsReplaced(object sender, CollectionItemsChangedEventArgs e) {
if (InvokeRequired)
Invoke(new CollectionItemsChangedEventHandler(Rows_ItemsReplaced), sender, e);
else {
RemoveDataRows(e.OldItems);
AddDataRows(e.Items);
}
}
private void Rows_CollectionReset(object sender, CollectionItemsChangedEventArgs e) {
if (InvokeRequired)
Invoke(new CollectionItemsChangedEventHandler(Rows_CollectionReset), sender, e);
else {
RemoveDataRows(e.OldItems);
AddDataRows(e.Items);
}
}
#endregion
#region Row Event Handlers
private void Row_VisualPropertiesChanged(object sender, EventArgs e) {
if (InvokeRequired)
Invoke(new EventHandler(Row_VisualPropertiesChanged), sender, e);
else {
DataRow row = (DataRow)sender;
Series series = chart.Series[row.Name];
ClearPoints(series.Points);
ConfigureSeries(series, row);
if (!invisibleSeries.Contains(series)) {
FillSeriesWithRowValues(series, row);
RecalculateAxesScale(chart.ChartAreas[0]);
UpdateHistogramTransparency();
}
}
}
private void Row_NameChanged(object sender, EventArgs e) {
if (InvokeRequired)
Invoke(new EventHandler(Row_NameChanged), sender, e);
else {
DataRow row = (DataRow)sender;
chart.Series[row.Name].Name = row.Name;
}
}
#endregion
#region Values Event Handlers
private void Values_ItemsAdded(object sender, CollectionItemsChangedEventArgs> e) {
if (InvokeRequired)
Invoke(new CollectionItemsChangedEventHandler>(Values_ItemsAdded), sender, e);
else {
DataRow row = null;
valuesRowsTable.TryGetValue((IObservableList)sender, out row);
if (row != null) {
Series rowSeries = chart.Series[row.Name];
if (!invisibleSeries.Contains(rowSeries)) {
ClearPoints(rowSeries.Points);
FillSeriesWithRowValues(rowSeries, row);
RecalculateAxesScale(chart.ChartAreas[0]);
UpdateYCursorInterval();
}
}
}
}
private void Values_ItemsRemoved(object sender, CollectionItemsChangedEventArgs> e) {
if (InvokeRequired)
Invoke(new CollectionItemsChangedEventHandler>(Values_ItemsRemoved), sender, e);
else {
DataRow row = null;
valuesRowsTable.TryGetValue((IObservableList)sender, out row);
if (row != null) {
Series rowSeries = chart.Series[row.Name];
if (!invisibleSeries.Contains(rowSeries)) {
ClearPoints(rowSeries.Points);
FillSeriesWithRowValues(rowSeries, row);
RecalculateAxesScale(chart.ChartAreas[0]);
UpdateYCursorInterval();
}
}
}
}
private void Values_ItemsReplaced(object sender, CollectionItemsChangedEventArgs> e) {
if (InvokeRequired)
Invoke(new CollectionItemsChangedEventHandler>(Values_ItemsReplaced), sender, e);
else {
DataRow row = null;
valuesRowsTable.TryGetValue((IObservableList)sender, out row);
if (row != null) {
Series rowSeries = chart.Series[row.Name];
if (!invisibleSeries.Contains(rowSeries)) {
if (row.VisualProperties.ChartType == DataRowVisualProperties.DataRowChartType.Histogram) {
ClearPoints(rowSeries.Points);
FillSeriesWithRowValues(rowSeries, row);
} else {
foreach (IndexedItem item in e.Items) {
if (IsInvalidValue(item.Value))
rowSeries.Points[item.Index].IsEmpty = true;
else {
rowSeries.Points[item.Index].YValues = new double[] { item.Value };
rowSeries.Points[item.Index].IsEmpty = false;
}
}
}
RecalculateAxesScale(chart.ChartAreas[0]);
UpdateYCursorInterval();
}
}
}
}
private void Values_ItemsMoved(object sender, CollectionItemsChangedEventArgs> e) {
if (InvokeRequired)
Invoke(new CollectionItemsChangedEventHandler>(Values_ItemsMoved), sender, e);
else {
DataRow row = null;
valuesRowsTable.TryGetValue((IObservableList)sender, out row);
if (row != null) {
Series rowSeries = chart.Series[row.Name];
if (!invisibleSeries.Contains(rowSeries)) {
ClearPoints(rowSeries.Points);
FillSeriesWithRowValues(rowSeries, row);
RecalculateAxesScale(chart.ChartAreas[0]);
UpdateYCursorInterval();
}
}
}
}
private void Values_CollectionReset(object sender, CollectionItemsChangedEventArgs> e) {
if (InvokeRequired)
Invoke(new CollectionItemsChangedEventHandler>(Values_CollectionReset), sender, e);
else {
DataRow row = null;
valuesRowsTable.TryGetValue((IObservableList)sender, out row);
if (row != null) {
Series rowSeries = chart.Series[row.Name];
if (!invisibleSeries.Contains(rowSeries)) {
ClearPoints(rowSeries.Points);
FillSeriesWithRowValues(rowSeries, row);
RecalculateAxesScale(chart.ChartAreas[0]);
UpdateYCursorInterval();
}
}
}
}
#endregion
private void configureToolStripMenuItem_Click(object sender, EventArgs e) {
ShowConfiguration();
}
#endregion
#region Chart Event Handlers
private void chart_MouseDown(object sender, MouseEventArgs e) {
HitTestResult result = chart.HitTest(e.X, e.Y);
if (result.ChartElementType == ChartElementType.LegendItem) {
ToggleSeriesVisible(result.Series);
}
}
private void chart_MouseMove(object sender, MouseEventArgs e) {
HitTestResult result = chart.HitTest(e.X, e.Y);
if (result.ChartElementType == ChartElementType.LegendItem)
this.Cursor = Cursors.Hand;
else
this.Cursor = Cursors.Default;
}
private void chart_CustomizeLegend(object sender, CustomizeLegendEventArgs e) {
foreach (LegendItem legendItem in e.LegendItems) {
var series = chart.Series[legendItem.SeriesName];
if (series != null) {
bool seriesIsInvisible = invisibleSeries.Contains(series);
foreach (LegendCell cell in legendItem.Cells) {
cell.ForeColor = seriesIsInvisible ? Color.Gray : Color.Black;
}
}
}
}
#endregion
private void ToggleSeriesVisible(Series series) {
if (!invisibleSeries.Contains(series)) {
ClearPoints(series.Points);
invisibleSeries.Add(series);
} else {
invisibleSeries.Remove(series);
if (Content != null) {
var row = (from r in Content.Rows
where r.Name == series.Name
select r).Single();
FillSeriesWithRowValues(series, row);
this.chart.Legends[series.Legend].ForeColor = Color.Black;
RecalculateAxesScale(chart.ChartAreas[0]);
UpdateYCursorInterval();
}
}
}
private void FillSeriesWithRowValues(Series series, DataRow row) {
switch (row.VisualProperties.ChartType) {
case DataRowVisualProperties.DataRowChartType.Histogram:
// when a single histogram is updated, all histograms must be updated. otherwise the value ranges may not be equal.
var histograms = Content.Rows
.Where(r => r.VisualProperties.ChartType == DataRowVisualProperties.DataRowChartType.Histogram)
.ToList();
CalculateHistogram(series, row, histograms);
foreach (var h in from r in histograms
where r != row
let s = chart.Series.FindByName(r.Name)
where s != null
where !invisibleSeries.Contains(s)
select new { row = r, series = s }) {
ClearPoints(h.series.Points);
CalculateHistogram(h.series, h.row, histograms);
}
break;
default: {
bool yLogarithmic = series.YAxisType == AxisType.Primary
? Content.VisualProperties.YAxisLogScale
: Content.VisualProperties.SecondYAxisLogScale;
bool xLogarithmic = series.XAxisType == AxisType.Primary
? Content.VisualProperties.XAxisLogScale
: Content.VisualProperties.SecondXAxisLogScale;
for (int i = 0; i < row.Values.Count; i++) {
var value = row.Values[i];
var point = new DataPoint();
point.XValue = row.VisualProperties.StartIndexZero && !xLogarithmic ? i : i + 1;
if (IsInvalidValue(value) || (yLogarithmic && value <= 0))
point.IsEmpty = true;
else
point.YValues = new double[] { value };
series.Points.Add(point);
}
}
break;
}
}
protected virtual void CalculateHistogram(Series series, DataRow row, IEnumerable histogramRows) {
ClearPoints(series.Points);
if (!row.Values.Any()) return;
var validValues = histogramRows.SelectMany(r => r.Values).Where(x => !IsInvalidValue(x)).ToList();
if (!validValues.Any()) return;
int bins = Content.VisualProperties.HistogramBins;
decimal minValue = (decimal)validValues.Min();
decimal maxValue = (decimal)validValues.Max();
decimal intervalWidth = (maxValue - minValue) / bins;
if (intervalWidth < 0) return;
if (intervalWidth == 0) {
series.Points.AddXY(minValue, row.Values.Count);
return;
}
if (!Content.VisualProperties.HistogramExactBins) {
intervalWidth = (decimal)HumanRoundRange((double)intervalWidth);
minValue = Math.Floor(minValue / intervalWidth) * intervalWidth;
maxValue = Math.Ceiling(maxValue / intervalWidth) * intervalWidth;
}
decimal intervalCenter = intervalWidth / 2;
decimal min = 0.0m, max = 0.0m;
if (!Double.IsNaN(Content.VisualProperties.XAxisMinimumFixedValue) && !Content.VisualProperties.XAxisMinimumAuto)
min = (decimal)Content.VisualProperties.XAxisMinimumFixedValue;
else min = minValue;
if (!Double.IsNaN(Content.VisualProperties.XAxisMaximumFixedValue) && !Content.VisualProperties.XAxisMaximumAuto)
max = (decimal)Content.VisualProperties.XAxisMaximumFixedValue;
else max = maxValue + intervalWidth;
double axisInterval = (double)intervalWidth / row.VisualProperties.ScaleFactor;
var area = chart.ChartAreas[0];
area.AxisX.Interval = axisInterval;
series.SetCustomProperty("PointWidth", "1"); // 0.8 is the default value
// get the range or intervals which define the grouping of the frequency values
var range = Range(min, max, intervalWidth).Skip(1).ToList();
// aggregate the row values by unique key and frequency value
var valueFrequencies = (from v in row.Values
where !IsInvalidValue(v)
orderby v
group v by v into g
select new Tuple(g.First(), g.Count())).ToList();
// ensure that each column is displayed completely on the chart by adding two dummy datapoints on the upper and lower range
series.Points.Add(new DataPoint((double)(min - intervalWidth), 0));
series.Points.Add(new DataPoint((double)(max + intervalWidth), 0));
// add data points
int j = 0;
int overallCount = row.Values.Count(x => !IsInvalidValue(x));
foreach (var d in range) {
double sum = 0.0;
// sum the frequency values that fall within the same interval
while (j < valueFrequencies.Count && (decimal)valueFrequencies[j].Item1 < d) {
sum += valueFrequencies[j].Item2;
++j;
}
string xAxisTitle = string.IsNullOrEmpty(Content.VisualProperties.XAxisTitle)
? "X"
: Content.VisualProperties.XAxisTitle;
string yAxisTitle = string.IsNullOrEmpty(Content.VisualProperties.YAxisTitle)
? "Y"
: Content.VisualProperties.YAxisTitle;
series.Points.Add(new DataPoint((double)(d - intervalCenter), sum) {
ToolTip =
string.Format("{0}: [{1} - {2})", xAxisTitle, (d - intervalWidth), d) + Environment.NewLine +
string.Format("{0}: {1} ({2:F2}%)", yAxisTitle, sum, sum / overallCount * 100)
});
}
}
#region Helpers
public static IEnumerable Range(decimal min, decimal max, decimal step) {
decimal i;
for (i = min; i <= max; i += step)
yield return i;
if (i != max + step)
yield return i;
}
protected void RemoveCustomPropertyIfExists(Series series, string property) {
if (series.IsCustomPropertySet(property)) series.DeleteCustomProperty(property);
}
private double HumanRoundRange(double range) {
double base10 = Math.Pow(10.0, Math.Floor(Math.Log10(range)));
double rounding = range / base10;
if (rounding <= 1.5) rounding = 1;
else if (rounding <= 2.25) rounding = 2;
else if (rounding <= 3.75) rounding = 2.5;
else if (rounding <= 7.5) rounding = 5;
else rounding = 10;
return rounding * base10;
}
private double HumanRoundMax(double max) {
double base10;
if (max > 0) base10 = Math.Pow(10.0, Math.Floor(Math.Log10(max)));
else base10 = Math.Pow(10.0, Math.Ceiling(Math.Log10(-max)));
double rounding = (max > 0) ? base10 : -base10;
while (rounding < max) rounding += base10;
return rounding;
}
private ChartDashStyle ConvertLineStyle(DataRowVisualProperties.DataRowLineStyle dataRowLineStyle) {
switch (dataRowLineStyle) {
case DataRowVisualProperties.DataRowLineStyle.Dash:
return ChartDashStyle.Dash;
case DataRowVisualProperties.DataRowLineStyle.DashDot:
return ChartDashStyle.DashDot;
case DataRowVisualProperties.DataRowLineStyle.DashDotDot:
return ChartDashStyle.DashDotDot;
case DataRowVisualProperties.DataRowLineStyle.Dot:
return ChartDashStyle.Dot;
case DataRowVisualProperties.DataRowLineStyle.NotSet:
return ChartDashStyle.NotSet;
case DataRowVisualProperties.DataRowLineStyle.Solid:
return ChartDashStyle.Solid;
default:
return ChartDashStyle.NotSet;
}
}
protected static bool IsInvalidValue(double x) {
return double.IsNaN(x) || x < (double)decimal.MinValue || x > (double)decimal.MaxValue;
}
// workaround for performance problem as described in https://stackoverflow.com/questions/5744930/datapointcollection-clear-performance
public static void ClearPoints(DataPointCollection points) {
points.SuspendUpdates();
while (points.Count > 0)
points.RemoveAt(points.Count - 1);
points.ResumeUpdates();
}
#endregion
}
}