DutyContent/Libre/PingGrapher.cs

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C#
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Drawing;
namespace DutyContent.Libre
{
class PingGrapher
{
private PictureBox _pbx;
private Bitmap _bmp;
private Font _fnt;
private int _count_per_line;
public int Width { get; private set; } = -1;
public int Height { get; private set; } = -1;
public int Step { get; set; } = 20;
//
public PingGrapher(PictureBox container_pbx)
{
_pbx = container_pbx;
_fnt = new Font(FontFamily.GenericSansSerif, 7.0f, FontStyle.Regular, GraphicsUnit.Pixel);
}
//
public void Enter()
{
if (_pbx == null)
return;
if (Width != _pbx.ClientSize.Width || Height != _pbx.ClientSize.Height)
{
Width = _pbx.ClientSize.Width;
Height = _pbx.ClientSize.Height;
_count_per_line = (Width - Step + Step) / Step + 1;
_bmp = new Bitmap(Width, Height);
}
if (_bmp != null)
{
using (var g = Graphics.FromImage(_bmp))
g.Clear(Color.Black);
}
}
//
class CalcData
{
public int[] Values { get; set; }
public int Count { get; set; }
public int Min { get; set; } = int.MaxValue;
public int Max { get; set; } = int.MinValue;
public int RangeMax { get; set; }
public int RangeStep { get; set; }
public CalcData(List<int> lst, int count_per_line, int range_delta)
{
var at = Math.Max(lst.Count - count_per_line, 0);
Count = lst.Count - at;
Values = new int[Count];
for (int j = 0, i = lst.Count - 1; i >= at; i--)
{
if (Min > lst[i]) Min = lst[i];
if (Max < lst[i]) Max = lst[i];
Values[j++] = lst[i];
}
var rf = (float)(Max + range_delta) / 10.0f;
RangeMax = ((int)Math.Round(rf) + 1) * 10;
RangeStep =
RangeMax < 100 ? 20 :
RangeMax < 300 ? 40 :
RangeMax < 1000 ? 100 : 200;
}
}
public void DrawValues(List<int> values, DrawType drawtype = DrawType.Linear)
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{
if (_bmp == null || values.Count < 2)
return;
var cd = new CalcData(values, _count_per_line, 5);
var height = (float)Height;
var scale = height / cd.RangeMax;
using (var g = Graphics.FromImage(_bmp))
{
float f;
int u;
for (var i = cd.RangeStep; i < cd.RangeMax; i += cd.RangeStep)
{
f = height - i * scale;
u = (int)f;
g.DrawLine(Pens.DarkBlue, 0, u, Width - 1, u);
g.DrawString(i.ToString(), _fnt, Brushes.DarkGray, 0.0f, f);
}
var pen = new Pen(Color.White, 2.0f);
#if false
u = 0;
// linear
for (var i = 0; i < cd.Count - 1; i++)
{
var y1 = height - cd.Values[i] * scale;
var y2 = height - cd.Values[i + 1] * scale;
g.DrawLine(pen, u, y1, u + Step, y2);
u += Step;
}
#else
// curved
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if (cd.Count > 2)
{
u = 10;
var pts = new PointF[cd.Count - 1];
for (var i = 0; i < cd.Count - 1; i++, u += Step)
pts[i] = new PointF(u, height - cd.Values[i] * scale);
if (drawtype == DrawType.Linear)
g.DrawLines(pen, pts);
else if (drawtype == DrawType.Curved)
g.DrawCurve(pen, pts, 0.6f);
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}
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#endif
}
}
//
public void Leave()
{
_pbx.Image = _bmp;
_pbx.Refresh();
}
//
public enum DrawType : int
{
Linear = 0,
Curved = 1
}
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}
}