gui-cs.Terminal.Gui/UICatalog/Scenarios/GraphViewExample.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Terminal.Gui;

namespace UICatalog.Scenarios;

[ScenarioMetadata ("Graph View", "Demos the GraphView control.")]
[ScenarioCategory ("Controls")]
[ScenarioCategory ("Drawing")]
public class GraphViewExample : Scenario {
	TextView _about;

	int _currentGraph;
	Action [] _graphs;

	GraphView _graphView;
	MenuItem _miDiags;
	MenuItem _miShowBorder;
	Thickness _thickness = new Thickness (1, 1, 1, 1);

	public override void Setup ()
	{
		Win.Title = GetName ();
		Win.Y = 1; // menu
		Win.Height = Dim.Fill (1); // status bar

		_graphs = new [] {
			() => SetupPeriodicTableScatterPlot (), //0
			() => SetupLifeExpectancyBarGraph (true), //1
			() => SetupLifeExpectancyBarGraph (false), //2
			() => SetupPopulationPyramid (), //3
			() => SetupLineGraph (), //4
			() => SetupSineWave (), //5
			() => SetupDisco (), //6
			() => MultiBarGraph () //7
		};

		var menu = new MenuBar (new MenuBarItem [] {
			new ("_File", new MenuItem [] {
				new ("Scatter _Plot", "", () => _graphs [_currentGraph = 0] ()),
				new ("_V Bar Graph", "", () => _graphs [_currentGraph = 1] ()),
				new ("_H Bar Graph", "", () => _graphs [_currentGraph = 2] ()),
				new ("P_opulation Pyramid", "", () => _graphs [_currentGraph = 3] ()),
				new ("_Line Graph", "", () => _graphs [_currentGraph = 4] ()),
				new ("Sine _Wave", "", () => _graphs [_currentGraph = 5] ()),
				new ("Silent _Disco", "", () => _graphs [_currentGraph = 6] ()),
				new ("_Multi Bar Graph", "", () => _graphs [_currentGraph = 7] ()),
				new ("_Quit", "", () => Quit ())
			}),
			new ("_View", new [] {
				new ("Zoom _In", "", () => Zoom (0.5f)),
				new ("Zoom _Out", "", () => Zoom (2f)),
				new ("MarginLeft++", "", () => Margin (true, true)),
				new ("MarginLeft--", "", () => Margin (true, false)),
				new ("MarginBottom++", "", () => Margin (false, true)),
				new ("MarginBottom--", "", () => Margin (false, false)),
				_miShowBorder = new MenuItem ("_Enable Margin, Border, and Padding", "", () => ShowBorder ()) {
					Checked = true,
					CheckType = MenuItemCheckStyle.Checked
				},
				_miDiags = new MenuItem ("Dri_ver Diagnostics", "", () => EnableDiagnostics ()) {
					Checked = ConsoleDriver.Diagnostics == (ConsoleDriver.DiagnosticFlags.FramePadding | ConsoleDriver.DiagnosticFlags.FrameRuler),
					CheckType = MenuItemCheckStyle.Checked
				}
			})
		});
		Application.Top.Add (menu);

		_graphView = new GraphView {
			X = 0,
			Y = 0,
			Width = Dim.Percent (70),
			Height = Dim.Fill (),
			BorderStyle = LineStyle.Single
		};
		_graphView.Border.Thickness = _thickness;
		_graphView.Margin.Thickness = _thickness;
		_graphView.Padding.Thickness = _thickness;

		Win.Add (_graphView);

		var frameRight = new FrameView ("About") {
			X = Pos.Right (_graphView) + 1,
			Y = 0,
			Width = Dim.Fill (),
			Height = Dim.Fill ()
		};

		frameRight.Add (_about = new TextView {
			Width = Dim.Fill (),
			Height = Dim.Fill ()
		});

		Win.Add (frameRight);

		var statusBar = new StatusBar (new StatusItem [] {
			new (Application.QuitKey, $"{Application.QuitKey} to Quit", () => Quit ()),
			new (KeyCode.CtrlMask | KeyCode.G, "~^G~ Next", () => _graphs [_currentGraph++ % _graphs.Length] ())
		});
		Application.Top.Add (statusBar);
	}

	void ShowBorder ()
	{
		_miShowBorder.Checked = !_miShowBorder.Checked;

		if (_miShowBorder.Checked == true) {
			_graphView.BorderStyle = LineStyle.Single;
			_graphView.Border.Thickness = _thickness;
			_graphView.Margin.Thickness = _thickness;
			_graphView.Padding.Thickness = _thickness;
		} else {
			_graphView.BorderStyle = LineStyle.None;
			_graphView.Margin.Thickness = Thickness.Empty;
			_graphView.Padding.Thickness = Thickness.Empty;
		}

	}

	void EnableDiagnostics ()
	{
		_miDiags.Checked = !_miDiags.Checked;

		ConsoleDriver.Diagnostics = _miDiags.Checked == true ? ConsoleDriver.DiagnosticFlags.FramePadding | ConsoleDriver.DiagnosticFlags.FrameRuler : ConsoleDriver.DiagnosticFlags.Off;
		Application.Refresh ();
	}

	void MultiBarGraph ()
	{
		_graphView.Reset ();

		_graphView.Title = "Multi Bar";

		_about.Text = "Housing Expenditures by income thirds 1996-2003";

		var fore = _graphView.ColorScheme.Normal.Foreground == new Color (ColorName.Black) ? new Color (ColorName.White) : _graphView.ColorScheme.Normal.Foreground;
		var black = new Attribute (fore, Color.Black);
		var cyan = new Attribute (Color.BrightCyan, Color.Black);
		var magenta = new Attribute (Color.BrightMagenta, Color.Black);
		var red = new Attribute (Color.BrightRed, Color.Black);

		_graphView.GraphColor = black;

		var series = new MultiBarSeries (3, 1, 0.25f, new [] { magenta, cyan, red });

		var stiple = CM.Glyphs.Stipple;

		series.AddBars ("'96", stiple, 5900, 9000, 14000);
		series.AddBars ("'97", stiple, 6100, 9200, 14800);
		series.AddBars ("'98", stiple, 6000, 9300, 14600);
		series.AddBars ("'99", stiple, 6100, 9400, 14950);
		series.AddBars ("'00", stiple, 6200, 9500, 15200);
		series.AddBars ("'01", stiple, 6250, 9900, 16000);
		series.AddBars ("'02", stiple, 6600, 11000, 16700);
		series.AddBars ("'03", stiple, 7000, 12000, 17000);

		_graphView.CellSize = new PointF (0.25f, 1000);
		_graphView.Series.Add (series);
		_graphView.SetNeedsDisplay ();

		_graphView.MarginLeft = 3;
		_graphView.MarginBottom = 1;

		_graphView.AxisY.LabelGetter = v => '$' + (v.Value / 1000f).ToString ("N0") + 'k';

		// Do not show x axis labels (bars draw their own labels)
		_graphView.AxisX.Increment = 0;
		_graphView.AxisX.ShowLabelsEvery = 0;
		_graphView.AxisX.Minimum = 0;

		_graphView.AxisY.Minimum = 0;

		var legend = new LegendAnnotation (new Rect (_graphView.Bounds.Width - 20, 0, 20, 5));
		legend.AddEntry (new GraphCellToRender (stiple, series.SubSeries.ElementAt (0).OverrideBarColor), "Lower Third");
		legend.AddEntry (new GraphCellToRender (stiple, series.SubSeries.ElementAt (1).OverrideBarColor), "Middle Third");
		legend.AddEntry (new GraphCellToRender (stiple, series.SubSeries.ElementAt (2).OverrideBarColor), "Upper Third");
		_graphView.Annotations.Add (legend);
	}

	void SetupLineGraph ()
	{
		_graphView.Reset ();

		_graphView.Title = "Line";

		_about.Text = "This graph shows random points";

		var black = new Attribute (_graphView.ColorScheme.Normal.Foreground, Color.Black);
		var cyan = new Attribute (Color.BrightCyan, Color.Black);
		var magenta = new Attribute (Color.BrightMagenta, Color.Black);
		var red = new Attribute (Color.BrightRed, Color.Black);

		_graphView.GraphColor = black;

		var randomPoints = new List<PointF> ();

		var r = new Random ();

		for (var i = 0; i < 10; i++) {
			randomPoints.Add (new PointF (r.Next (100), r.Next (100)));
		}

		var points = new ScatterSeries {
			Points = randomPoints
		};

		var line = new PathAnnotation {
			LineColor = cyan,
			Points = randomPoints.OrderBy (p => p.X).ToList (),
			BeforeSeries = true
		};

		_graphView.Series.Add (points);
		_graphView.Annotations.Add (line);

		randomPoints = new List<PointF> ();

		for (var i = 0; i < 10; i++) {
			randomPoints.Add (new PointF (r.Next (100), r.Next (100)));
		}

		var points2 = new ScatterSeries {
			Points = randomPoints,
			Fill = new GraphCellToRender ((Rune)'x', red)
		};

		var line2 = new PathAnnotation {
			LineColor = magenta,
			Points = randomPoints.OrderBy (p => p.X).ToList (),
			BeforeSeries = true
		};

		_graphView.Series.Add (points2);
		_graphView.Annotations.Add (line2);

		// How much graph space each cell of the console depicts
		_graphView.CellSize = new PointF (2, 5);

		// leave space for axis labels
		_graphView.MarginBottom = 2;
		_graphView.MarginLeft = 3;

		// One axis tick/label per
		_graphView.AxisX.Increment = 20;
		_graphView.AxisX.ShowLabelsEvery = 1;
		_graphView.AxisX.Text = "X →";

		_graphView.AxisY.Increment = 20;
		_graphView.AxisY.ShowLabelsEvery = 1;
		_graphView.AxisY.Text = "↑Y";

		var max = line.Points.Union (line2.Points).OrderByDescending (p => p.Y).First ();
		_graphView.Annotations.Add (new TextAnnotation { Text = "(Max)", GraphPosition = new PointF (max.X + 2 * _graphView.CellSize.X, max.Y) });

		_graphView.SetNeedsDisplay ();
	}

	void SetupSineWave ()
	{
		_graphView.Reset ();

		_graphView.Title = "Sine Wave";

		_about.Text = "This graph shows a sine wave";

		var points = new ScatterSeries ();
		var line = new PathAnnotation ();

		// Draw line first so it does not draw over top of points or axis labels
		line.BeforeSeries = true;

		// Generate line graph with 2,000 points
		for (float x = -500; x < 500; x += 0.5f) {
			points.Points.Add (new PointF (x, (float)Math.Sin (x)));
			line.Points.Add (new PointF (x, (float)Math.Sin (x)));
		}

		_graphView.Series.Add (points);
		_graphView.Annotations.Add (line);

		// How much graph space each cell of the console depicts
		_graphView.CellSize = new PointF (0.1f, 0.1f);

		// leave space for axis labels
		_graphView.MarginBottom = 2;
		_graphView.MarginLeft = 3;

		// One axis tick/label per
		_graphView.AxisX.Increment = 0.5f;
		_graphView.AxisX.ShowLabelsEvery = 2;
		_graphView.AxisX.Text = "X →";
		_graphView.AxisX.LabelGetter = v => v.Value.ToString ("N2");

		_graphView.AxisY.Increment = 0.2f;
		_graphView.AxisY.ShowLabelsEvery = 2;
		_graphView.AxisY.Text = "↑Y";
		_graphView.AxisY.LabelGetter = v => v.Value.ToString ("N2");

		_graphView.ScrollOffset = new PointF (-2.5f, -1);

		_graphView.SetNeedsDisplay ();
	}
	/*
	Country,Both,Male,Female

"Switzerland",83.4,81.8,85.1
"South Korea",83.3,80.3,86.1
"Singapore",83.2,81,85.5
"Spain",83.2,80.7,85.7
"Cyprus",83.1,81.1,85.1
"Australia",83,81.3,84.8
"Italy",83,80.9,84.9
"Norway",83,81.2,84.7
"Israel",82.6,80.8,84.4
"France",82.5,79.8,85.1
"Luxembourg",82.4,80.6,84.2
"Sweden",82.4,80.8,84
"Iceland",82.3,80.8,83.9
"Canada",82.2,80.4,84.1
"New Zealand",82,80.4,83.5
"Malta,81.9",79.9,83.8
"Ireland",81.8,80.2,83.5
"Netherlands",81.8,80.4,83.1
"Germany",81.7,78.7,84.8
"Austria",81.6,79.4,83.8
"Finland",81.6,79.2,84
"Portugal",81.6,78.6,84.4
"Belgium",81.4,79.3,83.5
"United Kingdom",81.4,79.8,83
"Denmark",81.3,79.6,83
"Slovenia",81.3,78.6,84.1
"Greece",81.1,78.6,83.6
"Kuwait",81,79.3,83.9
"Costa Rica",80.8,78.3,83.4*/

	void SetupLifeExpectancyBarGraph (bool verticalBars)
	{
		_graphView.Reset ();

		_graphView.Title = $"Life Expectancy - {(verticalBars ? "Vertical" : "Horizontal")}";

		_about.Text = "This graph shows the life expectancy at birth of a range of countries";

		var softStiple = new GraphCellToRender ((Rune)'\u2591');
		var mediumStiple = new GraphCellToRender ((Rune)'\u2592');

		var barSeries = new BarSeries {
			Bars = new List<BarSeriesBar> {
				new ("Switzerland", softStiple, 83.4f),
				new ("South Korea", !verticalBars ? mediumStiple : softStiple, 83.3f),
				new ("Singapore", softStiple, 83.2f),
				new ("Spain", !verticalBars ? mediumStiple : softStiple, 83.2f),
				new ("Cyprus", softStiple, 83.1f),
				new ("Australia", !verticalBars ? mediumStiple : softStiple, 83),
				new ("Italy", softStiple, 83),
				new ("Norway", !verticalBars ? mediumStiple : softStiple, 83),
				new ("Israel", softStiple, 82.6f),
				new ("France", !verticalBars ? mediumStiple : softStiple, 82.5f),
				new ("Luxembourg", softStiple, 82.4f),
				new ("Sweden", !verticalBars ? mediumStiple : softStiple, 82.4f),
				new ("Iceland", softStiple, 82.3f),
				new ("Canada", !verticalBars ? mediumStiple : softStiple, 82.2f),
				new ("New Zealand", softStiple, 82),
				new ("Malta", !verticalBars ? mediumStiple : softStiple, 81.9f),
				new ("Ireland", softStiple, 81.8f)
			}
		};

		_graphView.Series.Add (barSeries);

		if (verticalBars) {

			barSeries.Orientation = Orientation.Vertical;

			// How much graph space each cell of the console depicts
			_graphView.CellSize = new PointF (0.1f, 0.25f);
			// No axis marks since Bar will add it's own categorical marks
			_graphView.AxisX.Increment = 0f;
			_graphView.AxisX.Text = "Country";
			_graphView.AxisX.Minimum = 0;

			_graphView.AxisY.Increment = 1f;
			_graphView.AxisY.ShowLabelsEvery = 1;
			_graphView.AxisY.LabelGetter = v => v.Value.ToString ("N2");
			_graphView.AxisY.Minimum = 0;
			_graphView.AxisY.Text = "Age";

			// leave space for axis labels and title
			_graphView.MarginBottom = 2;
			_graphView.MarginLeft = 6;

			// Start the graph at 80 years because that is where most of our data is
			_graphView.ScrollOffset = new PointF (0, 80);

		} else {
			barSeries.Orientation = Orientation.Horizontal;

			// How much graph space each cell of the console depicts
			_graphView.CellSize = new PointF (0.1f, 1f);
			// No axis marks since Bar will add it's own categorical marks
			_graphView.AxisY.Increment = 0f;
			_graphView.AxisY.ShowLabelsEvery = 1;
			_graphView.AxisY.Text = "Country";
			_graphView.AxisY.Minimum = 0;

			_graphView.AxisX.Increment = 1f;
			_graphView.AxisX.ShowLabelsEvery = 1;
			_graphView.AxisX.LabelGetter = v => v.Value.ToString ("N2");
			_graphView.AxisX.Text = "Age";
			_graphView.AxisX.Minimum = 0;

			// leave space for axis labels and title
			_graphView.MarginBottom = 2;
			_graphView.MarginLeft = (uint)barSeries.Bars.Max (b => b.Text.Length) + 2;

			// Start the graph at 80 years because that is where most of our data is
			_graphView.ScrollOffset = new PointF (80, 0);
		}

		_graphView.SetNeedsDisplay ();
	}

	void SetupPopulationPyramid ()
	{
		/*
		Age,M,F
0-4,2009363,1915127
5-9,2108550,2011016
10-14,2022370,1933970
15-19,1880611,1805522
20-24,2072674,2001966
25-29,2275138,2208929
30-34,2361054,2345774
35-39,2279836,2308360
40-44,2148253,2159877
45-49,2128343,2167778
50-54,2281421,2353119
55-59,2232388,2306537
60-64,1919839,1985177
65-69,1647391,1734370
70-74,1624635,1763853
75-79,1137438,1304709
80-84,766956,969611
85-89,438663,638892
90-94,169952,320625
95-99,34524,95559
100+,3016,12818*/

		_about.Text = "This graph shows population of each age divided by gender";

		_graphView.Title = "Population Pyramid";

		_graphView.Reset ();

		// How much graph space each cell of the console depicts
		_graphView.CellSize = new PointF (100_000, 1);

		//center the x axis in middle of screen to show both sides
		_graphView.ScrollOffset = new PointF (-3_000_000, 0);

		_graphView.AxisX.Text = "Number Of People";
		_graphView.AxisX.Increment = 500_000;
		_graphView.AxisX.ShowLabelsEvery = 2;

		// use Abs to make negative axis labels positive
		_graphView.AxisX.LabelGetter = v => Math.Abs (v.Value / 1_000_000).ToString ("N2") + "M";

		// leave space for axis labels
		_graphView.MarginBottom = 2;
		_graphView.MarginLeft = 1;

		// do not show axis titles (bars have their own categories)
		_graphView.AxisY.Increment = 0;
		_graphView.AxisY.ShowLabelsEvery = 0;
		_graphView.AxisY.Minimum = 0;

		var stiple = new GraphCellToRender (CM.Glyphs.Stipple);

		// Bars in 2 directions

		// Males (negative to make the bars go left)
		var malesSeries = new BarSeries {
			Orientation = Orientation.Horizontal,
			Bars = new List<BarSeriesBar> {
				new ("0-4", stiple, -2009363),
				new ("5-9", stiple, -2108550),
				new ("10-14", stiple, -2022370),
				new ("15-19", stiple, -1880611),
				new ("20-24", stiple, -2072674),
				new ("25-29", stiple, -2275138),
				new ("30-34", stiple, -2361054),
				new ("35-39", stiple, -2279836),
				new ("40-44", stiple, -2148253),
				new ("45-49", stiple, -2128343),
				new ("50-54", stiple, -2281421),
				new ("55-59", stiple, -2232388),
				new ("60-64", stiple, -1919839),
				new ("65-69", stiple, -1647391),
				new ("70-74", stiple, -1624635),
				new ("75-79", stiple, -1137438),
				new ("80-84", stiple, -766956),
				new ("85-89", stiple, -438663),
				new ("90-94", stiple, -169952),
				new ("95-99", stiple, -34524),
				new ("100+", stiple, -3016)

			}
		};
		_graphView.Series.Add (malesSeries);

		// Females
		var femalesSeries = new BarSeries {
			Orientation = Orientation.Horizontal,
			Bars = new List<BarSeriesBar> {
				new ("0-4", stiple, 1915127),
				new ("5-9", stiple, 2011016),
				new ("10-14", stiple, 1933970),
				new ("15-19", stiple, 1805522),
				new ("20-24", stiple, 2001966),
				new ("25-29", stiple, 2208929),
				new ("30-34", stiple, 2345774),
				new ("35-39", stiple, 2308360),
				new ("40-44", stiple, 2159877),
				new ("45-49", stiple, 2167778),
				new ("50-54", stiple, 2353119),
				new ("55-59", stiple, 2306537),
				new ("60-64", stiple, 1985177),
				new ("65-69", stiple, 1734370),
				new ("70-74", stiple, 1763853),
				new ("75-79", stiple, 1304709),
				new ("80-84", stiple, 969611),
				new ("85-89", stiple, 638892),
				new ("90-94", stiple, 320625),
				new ("95-99", stiple, 95559),
				new ("100+", stiple, 12818)
			}
		};

		var softStiple = new GraphCellToRender ((Rune)'\u2591');
		var mediumStiple = new GraphCellToRender ((Rune)'\u2592');

		for (var i = 0; i < malesSeries.Bars.Count; i++) {
			malesSeries.Bars [i].Fill = i % 2 == 0 ? softStiple : mediumStiple;
			femalesSeries.Bars [i].Fill = i % 2 == 0 ? softStiple : mediumStiple;
		}

		_graphView.Series.Add (femalesSeries);

		_graphView.Annotations.Add (new TextAnnotation { Text = "M", ScreenPosition = new Point (0, 10) });
		_graphView.Annotations.Add (new TextAnnotation { Text = "F", ScreenPosition = new Point (_graphView.Bounds.Width - 1, 10) });

		_graphView.SetNeedsDisplay ();

	}

	void SetupDisco ()
	{
		_graphView.Reset ();

		_graphView.Title = "Graphic Equalizer";

		_about.Text = "This graph shows a graphic equalizer for an imaginary song";

		_graphView.GraphColor = new Attribute (Color.White, Color.Black);

		var stiple = new GraphCellToRender ((Rune)'\u2593');

		var r = new Random ();
		var series = new DiscoBarSeries ();
		var bars = new List<BarSeriesBar> ();

		var genSample = () => {

			bars.Clear ();
			// generate an imaginary sample
			for (var i = 0; i < 31; i++) {
				bars.Add (
					new BarSeriesBar (null, stiple, r.Next (0, 100)) {
						//ColorGetter = colorDelegate
					});
			}
			_graphView.SetNeedsDisplay ();

			// while the equaliser is showing
			return _graphView.Series.Contains (series);
		};

		Application.AddTimeout (TimeSpan.FromMilliseconds (250), genSample);

		series.Bars = bars;

		_graphView.Series.Add (series);

		// How much graph space each cell of the console depicts
		_graphView.CellSize = new PointF (1, 10);
		_graphView.AxisX.Increment = 0; // No graph ticks
		_graphView.AxisX.ShowLabelsEvery = 0; // no labels

		_graphView.AxisX.Visible = false;
		_graphView.AxisY.Visible = false;

		_graphView.SetNeedsDisplay ();
	}

	void SetupPeriodicTableScatterPlot ()
	{
		_graphView.Reset ();

		_graphView.Title = "Scatter Plot";

		_about.Text = "This graph shows the atomic weight of each element in the periodic table.\nStarting with Hydrogen (atomic Number 1 with a weight of 1.007)";

		//AtomicNumber and AtomicMass of all elements in the periodic table
		_graphView.Series.Add (
			new ScatterSeries {
				Points = new List<PointF> {
					new (1, 1.007f), new (2, 4.002f), new (3, 6.941f), new (4, 9.012f), new (5, 10.811f), new (6, 12.011f),
					new (7, 14.007f), new (8, 15.999f), new (9, 18.998f), new (10, 20.18f), new (11, 22.99f), new (12, 24.305f),
					new (13, 26.982f), new (14, 28.086f), new (15, 30.974f), new (16, 32.065f), new (17, 35.453f), new (18, 39.948f),
					new (19, 39.098f), new (20, 40.078f), new (21, 44.956f), new (22, 47.867f), new (23, 50.942f), new (24, 51.996f),
					new (25, 54.938f), new (26, 55.845f), new (27, 58.933f), new (28, 58.693f), new (29, 63.546f), new (30, 65.38f),
					new (31, 69.723f), new (32, 72.64f), new (33, 74.922f), new (34, 78.96f), new (35, 79.904f), new (36, 83.798f),
					new (37, 85.468f), new (38, 87.62f), new (39, 88.906f), new (40, 91.224f), new (41, 92.906f), new (42, 95.96f),
					new (43, 98f), new (44, 101.07f), new (45, 102.906f), new (46, 106.42f), new (47, 107.868f), new (48, 112.411f),
					new (49, 114.818f), new (50, 118.71f), new (51, 121.76f), new (52, 127.6f), new (53, 126.904f), new (54, 131.293f),
					new (55, 132.905f), new (56, 137.327f), new (57, 138.905f), new (58, 140.116f), new (59, 140.908f), new (60, 144.242f),
					new (61, 145), new (62, 150.36f), new (63, 151.964f), new (64, 157.25f), new (65, 158.925f), new (66, 162.5f),
					new (67, 164.93f), new (68, 167.259f), new (69, 168.934f), new (70, 173.054f), new (71, 174.967f), new (72, 178.49f),
					new (73, 180.948f), new (74, 183.84f), new (75, 186.207f), new (76, 190.23f), new (77, 192.217f), new (78, 195.084f),
					new (79, 196.967f), new (80, 200.59f), new (81, 204.383f), new (82, 207.2f), new (83, 208.98f), new (84, 210),
					new (85, 210), new (86, 222), new (87, 223), new (88, 226), new (89, 227), new (90, 232.038f), new (91, 231.036f),
					new (92, 238.029f), new (93, 237), new (94, 244), new (95, 243), new (96, 247), new (97, 247), new (98, 251),
					new (99, 252), new (100, 257), new (101, 258), new (102, 259), new (103, 262), new (104, 261), new (105, 262),
					new (106, 266), new (107, 264), new (108, 267), new (109, 268), new (113, 284), new (114, 289), new (115, 288),
					new (116, 292), new (117, 295), new (118, 294)
				}
			});

		// How much graph space each cell of the console depicts
		_graphView.CellSize = new PointF (1, 5);

		// leave space for axis labels
		_graphView.MarginBottom = 2;
		_graphView.MarginLeft = 3;

		// One axis tick/label per 5 atomic numbers
		_graphView.AxisX.Increment = 5;
		_graphView.AxisX.ShowLabelsEvery = 1;
		_graphView.AxisX.Text = "Atomic Number";
		_graphView.AxisX.Minimum = 0;

		// One label every 5 atomic weight
		_graphView.AxisY.Increment = 5;
		_graphView.AxisY.ShowLabelsEvery = 1;
		_graphView.AxisY.Minimum = 0;

		_graphView.SetNeedsDisplay ();
	}

	void Zoom (float factor)
	{
		_graphView.CellSize = new PointF (
			_graphView.CellSize.X * factor,
			_graphView.CellSize.Y * factor
		);

		_graphView.AxisX.Increment *= factor;
		_graphView.AxisY.Increment *= factor;

		_graphView.SetNeedsDisplay ();
	}

	void Margin (bool left, bool increase)
	{
		if (left) {
			_graphView.MarginLeft = (uint)Math.Max (0, _graphView.MarginLeft + (increase ? 1 : -1));
		} else {
			_graphView.MarginBottom = (uint)Math.Max (0, _graphView.MarginBottom + (increase ? 1 : -1));
		}

		_graphView.SetNeedsDisplay ();
	}

	void Quit () => Application.RequestStop ();

	class DiscoBarSeries : BarSeries {
		readonly Attribute brightgreen;
		readonly Attribute brightred;
		readonly Attribute brightyellow;
		readonly Attribute green;
		readonly Attribute red;

		public DiscoBarSeries ()
		{

			green = new Attribute (Color.BrightGreen, Color.Black);
			brightgreen = new Attribute (Color.Green, Color.Black);
			brightyellow = new Attribute (Color.BrightYellow, Color.Black);
			red = new Attribute (Color.Red, Color.Black);
			brightred = new Attribute (Color.BrightRed, Color.Black);
		}

		protected override void DrawBarLine (GraphView graph, Point start, Point end, BarSeriesBar beingDrawn)
		{
			var driver = Application.Driver;

			var x = start.X;
			for (var y = end.Y; y <= start.Y; y++) {

				var height = graph.ScreenToGraphSpace (x, y).Y;

				if (height >= 85) {
					driver.SetAttribute (red);
				} else if (height >= 66) {
					driver.SetAttribute (brightred);
				} else if (height >= 45) {
					driver.SetAttribute (brightyellow);
				} else if (height >= 25) {
					driver.SetAttribute (brightgreen);
				} else {
					driver.SetAttribute (green);
				}

				graph.AddRune (x, y, beingDrawn.Fill.Rune);
			}
		}
	}
}