Added multi coloured cell example

UICatalog/Scenarios/MultiColouredTable.cs

@@ -0,0 +1,166 @@
+using System;
+using System.Data;
+using Terminal.Gui;
+
+namespace UICatalog.Scenarios {
+
+	[ScenarioMetadata (Name: "MultiColouredTable", Description: "Demonstrates how to multi color cell contents")]
+	[ScenarioCategory ("Controls")]
+	public class MultiColouredTable : Scenario {
+		TableViewColors tableView;
+
+		public override void Setup ()
+		{
+			Win.Title = this.GetName ();
+			Win.Y = 1; // menu
+			Win.Height = Dim.Fill (1); // status bar
+			Top.LayoutSubviews ();
+
+			this.tableView = new TableViewColors () {
+				X = 0,
+				Y = 0,
+				Width = Dim.Fill (),
+				Height = Dim.Fill (1),
+			};
+
+			var menu = new MenuBar (new MenuBarItem [] {
+				new MenuBarItem ("_File", new MenuItem [] {
+					new MenuItem ("_Quit", "", () => Quit()),
+				}),
+			});
+			Top.Add (menu);
+
+			var statusBar = new StatusBar (new StatusItem [] {
+				new StatusItem(Key.CtrlMask | Key.Q, "~^Q~ Quit", () => Quit()),
+			});
+			Top.Add (statusBar);
+
+			Win.Add (tableView);
+
+			tableView.CellActivated += EditCurrentCell;
+
+			var dt = new DataTable ();
+			dt.Columns.Add ("Col1");
+			dt.Columns.Add ("Col2");
+
+			dt.Rows.Add ("some text", "Rainbows and Unicorns are so fun!");
+			dt.Rows.Add ("some text", "When it rains you get rainbows");
+			dt.Rows.Add (DBNull.Value, DBNull.Value);
+			dt.Rows.Add (DBNull.Value, DBNull.Value);
+			dt.Rows.Add (DBNull.Value, DBNull.Value);
+			dt.Rows.Add (DBNull.Value, DBNull.Value);
+
+			tableView.ColorScheme = new ColorScheme () {
+
+				Disabled = Win.ColorScheme.Disabled,
+				HotFocus = Win.ColorScheme.HotFocus,
+				Focus = Win.ColorScheme.Focus,
+				Normal = Application.Driver.MakeAttribute (Color.Gray, Color.Black)
+			};
+
+			tableView.Table = dt;
+		}
+				
+		private void Quit ()
+		{
+			Application.RequestStop ();
+		}
+		private bool GetText (string title, string label, string initialText, out string enteredText)
+		{
+			bool okPressed = false;
+
+			var ok = new Button ("Ok", is_default: true);
+			ok.Clicked += () => { okPressed = true; Application.RequestStop (); };
+			var cancel = new Button ("Cancel");
+			cancel.Clicked += () => { Application.RequestStop (); };
+			var d = new Dialog (title, 60, 20, ok, cancel);
+
+			var lbl = new Label () {
+				X = 0,
+				Y = 1,
+				Text = label
+			};
+
+			var tf = new TextField () {
+				Text = initialText,
+				X = 0,
+				Y = 2,
+				Width = Dim.Fill ()
+			};
+
+			d.Add (lbl, tf);
+			tf.SetFocus ();
+
+			Application.Run (d);
+
+			enteredText = okPressed ? tf.Text.ToString () : null;
+			return okPressed;
+		}
+		private void EditCurrentCell (TableView.CellActivatedEventArgs e)
+		{
+			if (e.Table == null)
+				return;
+
+			var oldValue = e.Table.Rows [e.Row] [e.Col].ToString ();
+
+			if (GetText ("Enter new value", e.Table.Columns [e.Col].ColumnName, oldValue, out string newText)) {
+				try {
+					e.Table.Rows [e.Row] [e.Col] = string.IsNullOrWhiteSpace (newText) ? DBNull.Value : (object)newText;
+				} catch (Exception ex) {
+					MessageBox.ErrorQuery (60, 20, "Failed to set text", ex.Message, "Ok");
+				}
+
+				tableView.Update ();
+			}
+		}
+
+		class TableViewColors : TableView {
+			protected override void RenderCell (Terminal.Gui.Attribute cellColor, string render, bool isPrimaryCell)
+			{
+				int unicorns = render.IndexOf ("unicorns",StringComparison.CurrentCultureIgnoreCase);
+				int rainbows = render.IndexOf ("rainbows", StringComparison.CurrentCultureIgnoreCase);
+
+				for (int i=0;i<render.Length;i++) {
+
+					if(unicorns != -1 && i >= unicorns && i <= unicorns + 8) {
+						Driver.SetAttribute (Driver.MakeAttribute (Color.White, cellColor.Background));
+					}
+					
+					if (rainbows != -1 && i >= rainbows && i <= rainbows + 8) {
+
+						var letterOfWord = i - rainbows;
+						switch(letterOfWord) {
+						case 0 :
+							Driver.SetAttribute (Driver.MakeAttribute (Color.Red, cellColor.Background));
+								break;
+						case 1:
+							Driver.SetAttribute (Driver.MakeAttribute (Color.BrightRed, cellColor.Background));
+								break;
+						case 2:
+							Driver.SetAttribute (Driver.MakeAttribute (Color.BrightYellow, cellColor.Background));
+								break;
+						case 3:
+							Driver.SetAttribute (Driver.MakeAttribute (Color.Green, cellColor.Background));
+								break;
+						case 4:
+							Driver.SetAttribute (Driver.MakeAttribute (Color.BrightGreen, cellColor.Background));
+								break;
+						case 5:
+							Driver.SetAttribute (Driver.MakeAttribute (Color.BrightBlue, cellColor.Background));
+								break;
+						case 6:
+							Driver.SetAttribute (Driver.MakeAttribute (Color.BrightCyan, cellColor.Background));
+								break;
+						case 7:
+							Driver.SetAttribute (Driver.MakeAttribute (Color.Cyan, cellColor.Background));
+								break;
+						}
+					} 
+					
+					Driver.AddRune (render [i]);
+					Driver.SetAttribute (cellColor);
+				}				
+			}
+		}
+	}
+}