docs: add samples using slider

linqpad-samples/Examples/FileOrder.txt

@@ -0,0 +1,3 @@
+Auto Charter.linq
+Spritesheet Cutter.linq
+Loan Balance Calculator.linq

linqpad-samples/Examples/Loan Balance Calculator.linq

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+<Query Kind="Program">
+  <Reference Relative="..\..\..\..\Source\Repos\linqpad-dump-editable\src\DumpEditable\bin\Debug\net47\LINQPad.DumpEditable.dll">C:\Users\rdavis\Source\Repos\linqpad-dump-editable\src\DumpEditable\bin\Debug\net47\LINQPad.DumpEditable.dll</Reference>
+  <Namespace>LINQPad.DumpEditable</Namespace>
+  <Namespace>LINQPad.Controls</Namespace>
+  <Namespace>System.Drawing</Namespace>
+</Query>
+
+void Main()
+{
+	// basic loan balance projector
+	// this one stresses LINQPad a bit	
+	var loanConfig = new LoanConfig
+	{
+		InitialBalance = 750000,
+		Years = 30,
+		Rate = 0.065,
+	};
+
+	var ed = EditableDumpContainer.For(loanConfig);
+	var output = new DumpContainer();
+
+	Util.HorizontalRun(true, ed, output).Dump();
+
+	ed.AddEditorRule(
+		EditorRule.For((o, p) => p.Name == nameof(loanConfig.InitialBalance),
+					   Editors.Slider(250000.0, 5000000.0, x => x, x => x),
+					   true));
+
+	ed.AddEditorRule(
+		EditorRule.For((o, p) => p.Name == nameof(loanConfig.Years),
+					   Editors.Slider(1, 50),
+					   true));
+
+	ed.AddEditorRule(
+		EditorRule.For((o, p) => p.Name == nameof(loanConfig.Rate),
+					   Editors.Slider(0.025, 0.15, x => x * 100, x => x / 100.0),
+					   true));
+
+	ed.OnChanged += () =>
+	{
+		var bals = GetBalanceSchedule(loanConfig);
+		var chart = Util.Chart(bals, x => x.period, x => x.balance, LINQPad.Util.SeriesType.Line).ToBitmap();
+
+		// since the sliders are multi-threaded this can fail sometimes
+		try { output.Content = chart; } catch { }
+	};
+
+	ed.OnChanged();
+}
+
+public List<(int period, double balance)> GetBalanceSchedule(LoanConfig loanConfig)
+{
+	var freqMultiplier = 
+		loanConfig.RepaymentFrequency == RepaymentFrequency.Fortnightly 
+		? 26 
+		: 12;
+
+	var balance = loanConfig.InitialBalance;
+	var periods = loanConfig.Years * freqMultiplier;
+	var rate = loanConfig.Rate / freqMultiplier;
+	var payment = (rate / (1 - (Math.Pow((1 + rate), -(periods))))) * balance;
+
+	return Enumerable
+		.Range(0, periods)
+		.Select(i =>
+		{ 
+			var interestForMonth = balance * rate;
+			var principalForMonth = payment - interestForMonth;
+
+			balance += interestForMonth;
+			balance -= payment;
+
+			return (i, Math.Round(balance,0) );
+		})
+		.ToList();
+}
+
+public class LoanConfig
+{
+	public double InitialBalance { get; set; }
+	public int Years { get; set; }
+	public double Rate { get; set; }
+	public RepaymentFrequency RepaymentFrequency { get; set; }
+}
+
+public enum RepaymentFrequency
+{
+	Fortnightly,
+	Monthly,
+}

linqpad-samples/How To/FileOrder.txt

@@ -6,4 +6,5 @@ Expansion (Anonymous Types).linq
 Dumping Enumerable-likes.linq
 Adding Editors (basic).linq
 Adding Editors (less basic).linq
-Adding Editors (non-global).linq
+Adding Editors (non-global).linq
+Slider Edutir.linq

linqpad-samples/How To/Slider Editor.linq

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+<Query Kind="Statements">
+  <Reference Relative="..\..\..\..\Source\Repos\linqpad-dump-editable\src\DumpEditable\bin\Debug\net47\LINQPad.DumpEditable.dll">C:\Users\rdavis\Source\Repos\linqpad-dump-editable\src\DumpEditable\bin\Debug\net47\LINQPad.DumpEditable.dll</Reference>
+  <Namespace>LINQPad.DumpEditable</Namespace>
+  <Namespace>LINQPad.Controls</Namespace>
+  <Namespace>System.Drawing</Namespace>
+</Query>
+
+var c = new { Pt = 25, R = 150, G = 150, B = 150 }
+	.DumpEditable(out var editor);
+
+editor.AddEditorRule(
+	EditorRule.ForType<int>(
+		Editors.Slider(0, 255),
+		true));
+
+var dc = new DumpContainer().Dump();
+editor.OnChanged += () =>
+	dc.Content = Util.WithStyle("LABEL", 
+		$"font-size:{c.Pt}px;" + 
+		$"color:#{Color.FromArgb(255, c.R, c.G, c.B).Name.Substring(2)};");
+
+editor.OnChanged();