More cleanup

app/UI/ControlHelper.cs

@@ -0,0 +1,169 @@
+using GHelper.UI;
+using System.Drawing.Drawing2D;
+using System.Windows.Forms.DataVisualization.Charting;
+
+public static class ControlHelper
+{
+
+    static bool _invert = false;
+    static float _scale = 1;
+
+    public static void Adjust(RForm container, bool invert = false)
+    {
+
+        container.BackColor = RForm.formBack;
+        container.ForeColor = RForm.foreMain;
+
+        _invert = invert;
+        AdjustControls(container.Controls);
+        _invert = false;
+
+    }
+
+    public static void Resize(RForm container, float baseScale = 2)
+    {
+        _scale = GetDpiScale(container).Value / baseScale;
+        if (Math.Abs(_scale - 1) > 0.2) ResizeControls(container.Controls);
+
+    }
+
+    private static void ResizeControls(Control.ControlCollection controls)
+    {
+        foreach (Control control in controls)
+        {
+            var button = control as RButton;
+            if (button != null && button.Image is not null)
+                button.Image = ResizeImage(button.Image);
+
+            /*
+            var pictureBox = control as PictureBox;
+            if (pictureBox != null && pictureBox.BackgroundImage is not null)
+                pictureBox.BackgroundImage = ResizeImage(pictureBox.BackgroundImage);
+            */
+
+            ResizeControls(control.Controls);
+        }
+    }
+
+
+    private static void AdjustControls(Control.ControlCollection controls)
+    {
+        foreach (Control control in controls)
+        {
+            var button = control as RButton;
+            if (button != null)
+            {
+                button.BackColor = button.Secondary ? RForm.buttonSecond : RForm.buttonMain;
+                button.ForeColor = RForm.foreMain;
+
+                button.FlatStyle = FlatStyle.Flat;
+                button.FlatAppearance.BorderColor = RForm.borderMain;
+
+                if (button.Image is not null)
+                    button.Image = AdjustImage(button.Image);
+            }
+
+            var pictureBox = control as PictureBox;
+            if (pictureBox != null && pictureBox.BackgroundImage is not null)
+                pictureBox.BackgroundImage = AdjustImage(pictureBox.BackgroundImage);
+
+
+            var combo = control as RComboBox;
+            if (combo != null)
+            {
+                combo.BackColor = RForm.buttonMain;
+                combo.ForeColor = RForm.foreMain;
+                combo.BorderColor = RForm.buttonMain;
+                combo.ButtonColor = RForm.buttonMain;
+                combo.ArrowColor = RForm.foreMain;
+            }
+
+            var gb = control as GroupBox;
+            if (gb != null)
+            {
+                gb.ForeColor = RForm.foreMain;
+            }
+
+            var sl = control as Slider;
+            if (sl != null)
+            {
+                sl.borderColor = RForm.buttonMain;
+            }
+
+            var chk = control as CheckBox;
+            if (chk != null && chk.Padding.Right > 5)
+            {
+                chk.BackColor = RForm.buttonSecond;
+            }
+
+            var chart = control as Chart;
+            if (chart != null)
+            {
+                chart.BackColor = RForm.chartMain;
+                chart.ChartAreas[0].BackColor = RForm.chartMain;
+
+                chart.ChartAreas[0].AxisX.TitleForeColor = RForm.foreMain;
+                chart.ChartAreas[0].AxisY.TitleForeColor = RForm.foreMain;
+
+                chart.ChartAreas[0].AxisX.LabelStyle.ForeColor = RForm.foreMain;
+                chart.ChartAreas[0].AxisY.LabelStyle.ForeColor = RForm.foreMain;
+
+                chart.ChartAreas[0].AxisX.MajorTickMark.LineColor = RForm.foreMain;
+                chart.ChartAreas[0].AxisY.MajorTickMark.LineColor = RForm.foreMain;
+
+                chart.ChartAreas[0].AxisX.MajorGrid.LineColor = RForm.chartGrid;
+                chart.ChartAreas[0].AxisY.MajorGrid.LineColor = RForm.chartGrid;
+                chart.ChartAreas[0].AxisX.LineColor = RForm.chartGrid;
+                chart.ChartAreas[0].AxisY.LineColor = RForm.chartGrid;
+
+                chart.Titles[0].ForeColor = RForm.foreMain;
+
+            }
+
+            AdjustControls(control.Controls);
+        }
+    }
+
+    public static Lazy<float> GetDpiScale(Control control)
+    {
+        return new Lazy<float>(() =>
+        {
+            using (var graphics = control.CreateGraphics())
+                return graphics.DpiX / 96.0f;
+        });
+    }
+
+    private static Image ResizeImage(Image image)
+    {
+        var newSize = new Size((int)(image.Width * _scale), (int)(image.Height * _scale));
+        var pic = new Bitmap(newSize.Width, newSize.Height);
+
+        using (var g = Graphics.FromImage(pic))
+        {
+            g.InterpolationMode = InterpolationMode.HighQualityBicubic;
+            g.DrawImage(image, new Rectangle(new Point(), newSize));
+        }
+        return pic;
+    }
+
+    private static Image AdjustImage(Image image)
+    {
+        var pic = new Bitmap(image);
+
+        if (_invert)
+        {
+            for (int y = 0; (y <= (pic.Height - 1)); y++)
+            {
+                for (int x = 0; (x <= (pic.Width - 1)); x++)
+                {
+                    Color col = pic.GetPixel(x, y);
+                    pic.SetPixel(x, y, Color.FromArgb(col.A, (255 - col.R), (255 - col.G), (255 - col.B)));
+                }
+            }
+        }
+
+        return pic;
+
+    }
+
+}

app/UI/CustomContextMenu.cs

@@ -0,0 +1,35 @@
+using System.Runtime.InteropServices;
+
+namespace GHelper.UI
+{
+    class CustomContextMenu : ContextMenuStrip
+    {
+        [DllImport("dwmapi.dll", CharSet = CharSet.Unicode, SetLastError = true)]
+        private static extern long DwmSetWindowAttribute(nint hwnd,
+                                                            DWMWINDOWATTRIBUTE attribute,
+                                                            ref DWM_WINDOW_CORNER_PREFERENCE pvAttribute,
+                                                            uint cbAttribute);
+
+        public CustomContextMenu()
+        {
+            var preference = DWM_WINDOW_CORNER_PREFERENCE.DWMWCP_ROUNDSMALL;     //change as you want
+            DwmSetWindowAttribute(Handle,
+                                  DWMWINDOWATTRIBUTE.DWMWA_WINDOW_CORNER_PREFERENCE,
+                                  ref preference,
+                                  sizeof(uint));
+        }
+
+        public enum DWMWINDOWATTRIBUTE
+        {
+            DWMWA_WINDOW_CORNER_PREFERENCE = 33
+        }
+        public enum DWM_WINDOW_CORNER_PREFERENCE
+        {
+            DWMWA_DEFAULT = 0,
+            DWMWCP_DONOTROUND = 1,
+            DWMWCP_ROUND = 2,
+            DWMWCP_ROUNDSMALL = 3,
+        }
+    }
+
+}

app/UI/CustomControls.cs

@@ -0,0 +1,398 @@
+using Microsoft.Win32;
+using System.ComponentModel;
+using System.Drawing.Drawing2D;
+using System.Runtime.InteropServices;
+
+namespace GHelper.UI
+{
+
+    public class RForm : Form
+    {
+
+        public static Color colorEco = Color.FromArgb(255, 6, 180, 138);
+        public static Color colorStandard = Color.FromArgb(255, 58, 174, 239);
+        public static Color colorTurbo = Color.FromArgb(255, 255, 32, 32);
+        public static Color colorCustom = Color.FromArgb(255, 255, 128, 0);
+
+
+        public static Color buttonMain;
+        public static Color buttonSecond;
+
+        public static Color formBack;
+        public static Color foreMain;
+        public static Color borderMain;
+        public static Color chartMain;
+        public static Color chartGrid;
+
+        [DllImport("UXTheme.dll", SetLastError = true, EntryPoint = "#138")]
+        public static extern bool CheckSystemDarkModeStatus();
+
+        [DllImport("DwmApi")] //System.Runtime.InteropServices
+        private static extern int DwmSetWindowAttribute(nint hwnd, int attr, int[] attrValue, int attrSize);
+
+        public bool darkTheme = false;
+
+        public static void InitColors(bool darkTheme)
+        {
+            if (darkTheme)
+            {
+                buttonMain = Color.FromArgb(255, 55, 55, 55);
+                buttonSecond = Color.FromArgb(255, 38, 38, 38);
+
+                formBack = Color.FromArgb(255, 28, 28, 28);
+                foreMain = Color.FromArgb(255, 240, 240, 240);
+                borderMain = Color.FromArgb(255, 50, 50, 50);
+
+                chartMain = Color.FromArgb(255, 35, 35, 35);
+                chartGrid = Color.FromArgb(255, 70, 70, 70);
+            }
+            else
+            {
+                buttonMain = SystemColors.ControlLightLight;
+                buttonSecond = SystemColors.ControlLight;
+
+                formBack = SystemColors.Control;
+                foreMain = SystemColors.ControlText;
+                borderMain = Color.LightGray;
+
+                chartMain = SystemColors.ControlLightLight;
+                chartGrid = Color.LightGray;
+            }
+        }
+
+        private static bool IsDarkTheme()
+        {
+            using var key = Registry.CurrentUser.OpenSubKey(@"Software\Microsoft\Windows\CurrentVersion\Themes\Personalize");
+            var registryValueObject = key?.GetValue("AppsUseLightTheme");
+
+            if (registryValueObject == null) return false;
+            return (int)registryValueObject <= 0;
+        }
+
+        public bool InitTheme(bool setDPI = false)
+        {
+            bool newDarkTheme = CheckSystemDarkModeStatus();
+            bool changed = darkTheme != newDarkTheme;
+            darkTheme = newDarkTheme;
+
+            InitColors(darkTheme);
+
+            if (setDPI)
+                ControlHelper.Resize(this);
+
+            if (changed)
+            {
+                DwmSetWindowAttribute(Handle, 20, new[] { darkTheme ? 1 : 0 }, 4);
+                ControlHelper.Adjust(this, changed);
+            }
+
+            return changed;
+
+        }
+
+    }
+
+
+    public class RCheckBox : CheckBox
+    {
+
+    }
+
+
+    public class RComboBox : ComboBox
+    {
+        private Color borderColor = Color.Gray;
+        [DefaultValue(typeof(Color), "Gray")]
+        public Color BorderColor
+        {
+            get { return borderColor; }
+            set
+            {
+                if (borderColor != value)
+                {
+                    borderColor = value;
+                    Invalidate();
+                }
+            }
+        }
+
+
+        private Color buttonColor = Color.FromArgb(255, 255, 255, 255);
+        [DefaultValue(typeof(Color), "255, 255, 255")]
+        public Color ButtonColor
+        {
+            get { return buttonColor; }
+            set
+            {
+                if (buttonColor != value)
+                {
+                    buttonColor = value;
+                    Invalidate();
+                }
+            }
+        }
+
+        private Color arrowColor = Color.Black;
+        [DefaultValue(typeof(Color), "Black")]
+        public Color ArrowColor
+        {
+            get { return arrowColor; }
+            set
+            {
+                if (arrowColor != value)
+                {
+                    arrowColor = value;
+                    Invalidate();
+                }
+            }
+        }
+
+
+        protected override void WndProc(ref Message m)
+        {
+            if (m.Msg == WM_PAINT && DropDownStyle != ComboBoxStyle.Simple)
+            {
+                var clientRect = ClientRectangle;
+                var dropDownButtonWidth = SystemInformation.HorizontalScrollBarArrowWidth;
+                var outerBorder = new Rectangle(clientRect.Location,
+                    new Size(clientRect.Width - 1, clientRect.Height - 1));
+                var innerBorder = new Rectangle(outerBorder.X + 1, outerBorder.Y + 1,
+                    outerBorder.Width - dropDownButtonWidth - 2, outerBorder.Height - 2);
+                var innerInnerBorder = new Rectangle(innerBorder.X + 1, innerBorder.Y + 1,
+                    innerBorder.Width - 2, innerBorder.Height - 2);
+                var dropDownRect = new Rectangle(innerBorder.Right + 1, innerBorder.Y,
+                    dropDownButtonWidth, innerBorder.Height + 1);
+                if (RightToLeft == RightToLeft.Yes)
+                {
+                    innerBorder.X = clientRect.Width - innerBorder.Right;
+                    innerInnerBorder.X = clientRect.Width - innerInnerBorder.Right;
+                    dropDownRect.X = clientRect.Width - dropDownRect.Right;
+                    dropDownRect.Width += 1;
+                }
+                var innerBorderColor = Enabled ? BackColor : SystemColors.Control;
+                var outerBorderColor = Enabled ? BorderColor : SystemColors.ControlDark;
+                var buttonColor = Enabled ? ButtonColor : SystemColors.Control;
+                var middle = new Point(dropDownRect.Left + dropDownRect.Width / 2,
+                    dropDownRect.Top + dropDownRect.Height / 2);
+                var arrow = new Point[]
+                {
+                new Point(middle.X - 3, middle.Y - 2),
+                new Point(middle.X + 4, middle.Y - 2),
+                new Point(middle.X, middle.Y + 2)
+                };
+                var ps = new PAINTSTRUCT();
+                bool shoulEndPaint = false;
+                nint dc;
+                if (m.WParam == nint.Zero)
+                {
+                    dc = BeginPaint(Handle, ref ps);
+                    m.WParam = dc;
+                    shoulEndPaint = true;
+                }
+                else
+                {
+                    dc = m.WParam;
+                }
+
+                var rgn = CreateRectRgn(innerInnerBorder.Left, innerInnerBorder.Top,
+                    innerInnerBorder.Right, innerInnerBorder.Bottom);
+
+                SelectClipRgn(dc, rgn);
+                DefWndProc(ref m);
+                DeleteObject(rgn);
+                rgn = CreateRectRgn(clientRect.Left, clientRect.Top,
+                    clientRect.Right, clientRect.Bottom);
+                SelectClipRgn(dc, rgn);
+                using (var g = Graphics.FromHdc(dc))
+                {
+                    using (var b = new SolidBrush(buttonColor))
+                    {
+                        g.FillRectangle(b, dropDownRect);
+                    }
+                    using (var b = new SolidBrush(arrowColor))
+                    {
+                        g.FillPolygon(b, arrow);
+                    }
+                    using (var p = new Pen(innerBorderColor))
+                    {
+                        g.DrawRectangle(p, innerBorder);
+                        g.DrawRectangle(p, innerInnerBorder);
+                    }
+                    using (var p = new Pen(outerBorderColor))
+                    {
+                        g.DrawRectangle(p, outerBorder);
+                    }
+                }
+                if (shoulEndPaint)
+                    EndPaint(Handle, ref ps);
+                DeleteObject(rgn);
+            }
+            else
+                base.WndProc(ref m);
+        }
+
+        private const int WM_PAINT = 0xF;
+        [StructLayout(LayoutKind.Sequential)]
+        public struct RECT
+        {
+            public int L, T, R, B;
+        }
+        [StructLayout(LayoutKind.Sequential)]
+        public struct PAINTSTRUCT
+        {
+            public nint hdc;
+            public bool fErase;
+            public int rcPaint_left;
+            public int rcPaint_top;
+            public int rcPaint_right;
+            public int rcPaint_bottom;
+            public bool fRestore;
+            public bool fIncUpdate;
+            public int reserved1;
+            public int reserved2;
+            public int reserved3;
+            public int reserved4;
+            public int reserved5;
+            public int reserved6;
+            public int reserved7;
+            public int reserved8;
+        }
+        [DllImport("user32.dll")]
+        private static extern nint BeginPaint(nint hWnd,
+            [In, Out] ref PAINTSTRUCT lpPaint);
+
+        [DllImport("user32.dll")]
+        private static extern bool EndPaint(nint hWnd, ref PAINTSTRUCT lpPaint);
+
+        [DllImport("gdi32.dll")]
+        public static extern int SelectClipRgn(nint hDC, nint hRgn);
+
+        [DllImport("user32.dll")]
+        public static extern int GetUpdateRgn(nint hwnd, nint hrgn, bool fErase);
+        public enum RegionFlags
+        {
+            ERROR = 0,
+            NULLREGION = 1,
+            SIMPLEREGION = 2,
+            COMPLEXREGION = 3,
+        }
+        [DllImport("gdi32.dll")]
+        internal static extern bool DeleteObject(nint hObject);
+
+        [DllImport("gdi32.dll")]
+        private static extern nint CreateRectRgn(int x1, int y1, int x2, int y2);
+    }
+
+    public class RButton : Button
+    {
+        //Fields
+        private int borderSize = 5;
+
+        private int borderRadius = 5;
+        public int BorderRadius
+        {
+            get { return borderRadius; }
+            set
+            {
+                borderRadius = value;
+            }
+        }
+
+        private Color borderColor = Color.Transparent;
+        public Color BorderColor
+        {
+            get { return borderColor; }
+            set
+            {
+                borderColor = value;
+            }
+        }
+
+
+        private bool activated = false;
+        public bool Activated
+        {
+            get { return activated; }
+            set
+            {
+                if (activated != value)
+                    Invalidate();
+                activated = value;
+
+            }
+        }
+
+        private bool secondary = false;
+        public bool Secondary
+        {
+            get { return secondary; }
+            set
+            {
+                secondary = value;
+            }
+        }
+
+        public RButton()
+        {
+            DoubleBuffered = true;
+            FlatStyle = FlatStyle.Flat;
+            FlatAppearance.BorderSize = 0;
+        }
+
+        private GraphicsPath GetFigurePath(Rectangle rect, int radius)
+        {
+            GraphicsPath path = new GraphicsPath();
+            float curveSize = radius * 2F;
+
+            path.StartFigure();
+            path.AddArc(rect.X, rect.Y, curveSize, curveSize, 180, 90);
+            path.AddArc(rect.Right - curveSize, rect.Y, curveSize, curveSize, 270, 90);
+            path.AddArc(rect.Right - curveSize, rect.Bottom - curveSize, curveSize, curveSize, 0, 90);
+            path.AddArc(rect.X, rect.Bottom - curveSize, curveSize, curveSize, 90, 90);
+            path.CloseFigure();
+            return path;
+        }
+
+
+        protected override void OnPaint(PaintEventArgs pevent)
+        {
+
+            base.OnPaint(pevent);
+
+            float ratio = pevent.Graphics.DpiX / 192.0f;
+            int border = (int)(ratio * borderSize);
+
+            Rectangle rectSurface = ClientRectangle;
+            Rectangle rectBorder = Rectangle.Inflate(rectSurface, -border, -border);
+
+            Color borderDrawColor = activated ? borderColor : Color.Transparent;
+
+            using (GraphicsPath pathSurface = GetFigurePath(rectSurface, borderRadius + border))
+            using (GraphicsPath pathBorder = GetFigurePath(rectBorder, borderRadius))
+            using (Pen penSurface = new Pen(Parent.BackColor, border))
+            using (Pen penBorder = new Pen(borderDrawColor, border))
+            {
+                penBorder.Alignment = PenAlignment.Outset;
+                pevent.Graphics.SmoothingMode = SmoothingMode.AntiAlias;
+                Region = new Region(pathSurface);
+                pevent.Graphics.DrawPath(penSurface, pathSurface);
+                pevent.Graphics.DrawPath(penBorder, pathBorder);
+            }
+
+            if (!Enabled && ForeColor != SystemColors.ControlText)
+            {
+                var rect = pevent.ClipRectangle;
+                if (Image is not null)
+                {
+                    rect.Y += Image.Height;
+                    rect.Height -= Image.Height;
+                }
+                TextFormatFlags flags = TextFormatFlags.HorizontalCenter | TextFormatFlags.VerticalCenter | TextFormatFlags.WordBreak;
+                TextRenderer.DrawText(pevent.Graphics, Text, Font, rect, Color.Gray, flags);
+            }
+
+
+        }
+
+    }
+}

app/UI/CustomControls.resx

@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>

app/UI/Slider.cs

@@ -0,0 +1,168 @@
+using System.Drawing.Drawing2D;
+
+namespace GHelper.UI
+{
+    public static class GraphicsExtensions
+    {
+        public static void DrawCircle(this Graphics g, Pen pen,
+                                      float centerX, float centerY, float radius)
+        {
+            g.DrawEllipse(pen, centerX - radius, centerY - radius,
+                          radius + radius, radius + radius);
+        }
+
+        public static void FillCircle(this Graphics g, Brush brush,
+                                      float centerX, float centerY, float radius)
+        {
+            g.FillEllipse(brush, centerX - radius, centerY - radius,
+                          radius + radius, radius + radius);
+        }
+    }
+
+    public class Slider : Control
+    {
+        private float _radius;
+        private PointF _thumbPos;
+        private SizeF _barSize;
+        private PointF _barPos;
+
+        private int _step = 5;
+
+        public Color accentColor = Color.FromArgb(255, 58, 174, 239);
+        public Color borderColor = Color.White;
+
+        public event EventHandler ValueChanged;
+
+        public Slider()
+        {
+            // This reduces flicker
+            DoubleBuffered = true;
+        }
+
+        private int _min = 0;
+        public int Min
+        {
+            get => _min;
+            set
+            {
+                _min = value;
+                RecalculateParameters();
+            }
+        }
+
+        private int _max = 100;
+        public int Max
+        {
+            get => _max;
+            set
+            {
+                _max = value;
+                RecalculateParameters();
+            }
+        }
+
+        private int _value = 50;
+        public int Value
+        {
+            get => _value;
+            set
+            {
+
+                value = (int)Math.Round(value / (float)_step) * _step;
+
+                if (_value != value)
+                {
+                    _value = value;
+                    ValueChanged?.Invoke(this, EventArgs.Empty);
+                    RecalculateParameters();
+                }
+            }
+        }
+
+        protected override void OnPaint(PaintEventArgs e)
+        {
+            base.OnPaint(e);
+
+            Brush brushAccent = new SolidBrush(accentColor);
+            Brush brushEmpty = new SolidBrush(Color.Gray);
+            Brush brushBorder = new SolidBrush(borderColor);
+
+            e.Graphics.SmoothingMode = SmoothingMode.AntiAlias;
+            e.Graphics.FillRectangle(brushEmpty,
+                _barPos.X, _barPos.Y, _barSize.Width, _barSize.Height);
+            e.Graphics.FillRectangle(brushAccent,
+                _barPos.X, _barPos.Y, _thumbPos.X - _barPos.X, _barSize.Height);
+
+            e.Graphics.FillCircle(brushBorder, _thumbPos.X, _thumbPos.Y, _radius);
+            e.Graphics.FillCircle(brushAccent, _thumbPos.X, _thumbPos.Y, 0.7f * _radius);
+        }
+
+        protected override void OnResize(EventArgs e)
+        {
+            base.OnResize(e);
+            RecalculateParameters();
+        }
+
+        private void RecalculateParameters()
+        {
+            _radius = 0.4F * ClientSize.Height;
+            _barSize = new SizeF(ClientSize.Width - 2 * _radius, ClientSize.Height * 0.15F);
+            _barPos = new PointF(_radius, (ClientSize.Height - _barSize.Height) / 2);
+            _thumbPos = new PointF(
+                _barSize.Width / (Max - Min) * (Value - Min) + _barPos.X,
+                _barPos.Y + 0.5f * _barSize.Height);
+            Invalidate();
+        }
+
+        bool _moving = false;
+        SizeF _delta;
+
+        protected override void OnMouseDown(MouseEventArgs e)
+        {
+            base.OnMouseDown(e);
+
+            // Difference between tumb and mouse position.
+            _delta = new SizeF(e.Location.X - _thumbPos.X, e.Location.Y - _thumbPos.Y);
+            if (_delta.Width * _delta.Width + _delta.Height * _delta.Height <= _radius * _radius)
+            {
+                // Clicking inside thumb.
+                _moving = true;
+            }
+
+            _calculateValue(e);
+
+        }
+
+        private void _calculateValue(MouseEventArgs e)
+        {
+            float thumbX = e.Location.X; // - _delta.Width;
+            if (thumbX < _barPos.X)
+            {
+                thumbX = _barPos.X;
+            }
+            else if (thumbX > _barPos.X + _barSize.Width)
+            {
+                thumbX = _barPos.X + _barSize.Width;
+            }
+            Value = (int)Math.Round(Min + (thumbX - _barPos.X) * (Max - Min) / _barSize.Width);
+
+        }
+
+        protected override void OnMouseMove(MouseEventArgs e)
+        {
+            base.OnMouseMove(e);
+            if (_moving)
+            {
+                _calculateValue(e);
+            }
+        }
+
+        protected override void OnMouseUp(MouseEventArgs e)
+        {
+            base.OnMouseUp(e);
+            _moving = false;
+        }
+
+    }
+
+}