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// 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;
MaxScrollY = lines.Count - visibleLines;
if (scrollOnOutput)
ScrollY = MaxScrollY;
}
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 ();
}
}
}
protected override void Dispose (bool disposing) {
Lines = null;
}
}
}
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