wip

1 files changed, 185 insertions, 0 deletions

diff --git a/src/LogViewerWidget.cs b/src/LogViewerWidget.cs
new file mode 100644
index 0000000..5dbb511
--- /dev/null
+++ b/src/LogViewerWidget.cs
@@ -0,0 +1,185 @@
+// Copyright (c) 2020  Jean-Philippe Bruyère <jp_bruyere@hotmail.com>
+//
+// This code is licensed under the MIT license (MIT) (http://opensource.org/licenses/MIT)
+
+using System;
+using System.Xml.Serialization;
+using System.ComponentModel;
+using System.Collections;
+using Crow.Drawing;
+
+namespace Crow
+{
+	public enum LogLevel
+	{
+		Minimal, Normal, Full, Debug
+	}
+	public enum LogType {
+		Low,
+		Normal,
+		High,
+		Debug,
+		Warning,
+		Error,
+		Custom1,
+		Custom2,
+		Custom3,
+	}
+	public class LogEntry {
+		public LogType Type;
+		public string msg;
+		public LogEntry (LogType type, string message) {
+			Type = type;
+			msg = message;
+		}
+		public override string ToString() => msg;
+	}
+	public class LogViewerWidget : ScrollingObject
+	{
+		ObservableList<LogEntry> lines;
+		bool scrollOnOutput;
+		int visibleLines = 1;
+		FontExtents fe;
+
+		[DefaultValue(true)]
+		public virtual bool ScrollOnOutput {
+			get { return scrollOnOutput; }
+			set {
+				if (scrollOnOutput == value)
+					return;
+				scrollOnOutput = value;
+				NotifyValueChanged ("ScrollOnOutput", scrollOnOutput);
+
+			}
+		}
+		public virtual ObservableList<LogEntry> Lines {
+			get { return lines; }
+			set {
+				if (lines == value)
+					return;
+				if (lines != null) {
+					lines.ListAdd -= Lines_ListAdd;
+					lines.ListRemove -= Lines_ListRemove;
+					lines.ListClear -= Lines_ListClear;
+				}
+				lines = value;
+				if (lines != null) {
+					lines.ListAdd += Lines_ListAdd;
+					lines.ListRemove += Lines_ListRemove;
+					lines.ListClear += Lines_ListClear;
+				}
+				NotifyValueChanged ("Lines", lines);
+				RegisterForGraphicUpdate ();
+			}
+		}
+		void Lines_ListClear (object sender, EventArgs e)
+		{
+			MaxScrollY = MaxScrollX = 0;
+		}
+
+		void Lines_ListAdd (object sender, ListChangedEventArg e)
+		{
+			// try
+			// {
+				MaxScrollY = lines.Count - visibleLines;
+				if (scrollOnOutput)
+					ScrollY = MaxScrollY;
+				
+			// }
+			// catch (System.Exception ex)
+			// {
+			// 	Console.WriteLine ($"list add valueChange handler bug:{ex}");
+			// }
+		}
+
+		void Lines_ListRemove (object sender, ListChangedEventArg e)
+		{
+			MaxScrollY = lines.Count - visibleLines;
+		}
+
+		public override void OnLayoutChanges (LayoutingType layoutType)
+		{
+			base.OnLayoutChanges (layoutType);
+
+			if (layoutType == LayoutingType.Height) {
+				using (ImageSurface img = new ImageSurface (Format.Argb32, 10, 10)) {
+					using (Context gr = new Context (img)) {
+						//Cairo.FontFace cf = gr.GetContextFontFace ();
+
+						gr.SelectFontFace (Font.Name, Font.Slant, Font.Wheight);
+						gr.SetFontSize (Font.Size);
+
+						fe = gr.FontExtents;
+					}
+				}
+				visibleLines = (int)Math.Floor ((double)ClientRectangle.Height / fe.Height);
+				MaxScrollY = lines == null ? 0 : lines.Count - visibleLines;
+			}
+		}
+		protected override void onDraw (Context gr)
+		{
+			base.onDraw (gr);
+
+			if (lines == null)
+				return;
+
+			gr.SelectFontFace (Font.Name, Font.Slant, Font.Wheight);
+			gr.SetFontSize (Font.Size);
+
+			Rectangle r = ClientRectangle;
+
+
+			double y = ClientRectangle.Y;
+			double x = ClientRectangle.X - ScrollX;
+
+			lock (lines) {
+				for (int i = 0; i < visibleLines; i++) {
+					if (i + ScrollY >= Lines.Count)
+						break;
+					//if ((lines [i + Scroll] as string).StartsWith ("error", StringComparison.OrdinalIgnoreCase)) {
+					//	errorFill.SetAsSource (gr);
+					//	gr.Rectangle (x, y, (double)r.Width, fe.Height);
+					//	gr.Fill ();
+					//	Foreground.SetAsSource (gr);
+					//}
+					LogEntry le = lines[i+ScrollY]; 
+					switch (le.Type) {
+						case LogType.Low:
+							gr.SetSource (Colors.DimGrey);
+							break;
+						case LogType.Normal:
+							gr.SetSource (Colors.Grey);
+							break;
+						case LogType.High:
+							gr.SetSource (Colors.White);
+							break;
+						case LogType.Debug:
+							gr.SetSource (Colors.Yellow);
+							break;
+						case LogType.Warning:
+							gr.SetSource (Colors.Orange);
+							break;
+						case LogType.Error:
+							gr.SetSource (Colors.Red);
+							break;
+						case LogType.Custom1:
+							gr.SetSource (Colors.Cyan);
+							break;
+						case LogType.Custom2:
+							gr.SetSource (Colors.Green);
+							break;
+						case LogType.Custom3:
+							gr.SetSource (Colors.LightPink);
+							break;
+					}
+					gr.MoveTo (x, y + fe.Ascent);
+					gr.ShowText (le.msg);
+					y += fe.Height;
+					gr.Fill ();
+				}
+			}
+		}
+
+	}
+}
+