LevelOS/Components/Textbox/LV-TEXTBOX1.cs

using System;
using System.ComponentModel;
using System.Drawing;
using System.Windows.Forms;
using static System.Net.Mime.MediaTypeNames;
using Image = System.Drawing.Image;

namespace CPM
{
    public partial class LV_TEXTBOX1 : UserControl
    {
        private Color borderColor = Color.Gray;
        private Color borderFocusColor = Color.DodgerBlue;
        private int borderSize = 2;
        private bool isFocused = false;
        private bool underlineStyle = false;

        public event EventHandler IconClick;

        public LV_TEXTBOX1()
        {
            InitializeComponent();
            Redraw();
        }

        // Propriedades
        public override string Text
        {
            get { return txt.Text; }
            set { txt.Text = value; }
        }
        public bool ReadOnly
        {
            get { return txt.ReadOnly; }
            set { txt.ReadOnly = value; }
        }
        public Color BorderColor
        {
            get { return borderColor; }
            set { borderColor = value; Invalidate(); }
        }

        public Color BorderFocusColor
        {
            get { return borderFocusColor; }
            set { borderFocusColor = value; Invalidate(); }
        }

        public int BorderSize
        {
            get { return borderSize; }
            set { borderSize = value; Invalidate(); }
        }
        // No seu LvlTextbox
        [Browsable(true)]
        [Category("Behavior")]
        public int SelectionStart
        {
            get { return txt.SelectionStart; }
            set { txt.SelectionStart = value; }
        }

        [Browsable(true)]
        [Category("Behavior")]
        public int MaxLength
        {
            get { return txt.MaxLength; }
            set { txt.MaxLength = value; }
        }
        [Browsable(true)]
        [Category("Behavior")]
        public bool Multiline
        {
            get { return txt.Multiline; }
            set { txt.Multiline = value; }
        }

        public bool UnderlineStyle
        {
            get { return underlineStyle; }
            set { underlineStyle = value; Invalidate(); }
        }

        public Image Icon
        {
            get { return picIcon.Image; }
            set
            {
                picIcon.Image = value;
                picIcon.Visible = (value != null);
                Redraw();
            }
        }

        public enum IconAlignEnum { Left, Right }

        private IconAlignEnum iconAlign = IconAlignEnum.Left;

        public IconAlignEnum IconAlign
        {
            get { return iconAlign; }
            set { iconAlign = value; Redraw(); }
        }

        // Renderização da borda
        protected override void OnPaint(PaintEventArgs e)
        {
            base.OnPaint(e);

            Color color = isFocused ? borderFocusColor : borderColor;

            using (Pen pen = new Pen(color, borderSize))
            {
                pen.Alignment = System.Drawing.Drawing2D.PenAlignment.Inset;

                if (underlineStyle)
                {
                    e.Graphics.DrawLine(pen, 0, Height - 1, Width, Height - 1);
                }
                else
                {
                    e.Graphics.DrawRectangle(pen, 0, 0, Width - 1, Height - 1);
                }
            }
        }

        // Atualizar layout
        public void Redraw()
        {
            int offset = 0;

            if (picIcon.Visible)
            {
                offset = picIcon.Width + 8;

                if (iconAlign == IconAlignEnum.Left)
                {
                    picIcon.Left = 5;
                    txt.Left = offset;
                    txt.Width = Width - offset - 5;
                }
                else
                {
                    picIcon.Left = Width - picIcon.Width - 5;
                    txt.Left = 5;
                    txt.Width = Width - offset - 5;
                }
            }
            else
            {
                txt.Left = 5;
                txt.Width = Width - 10;
            }

            Invalidate();
        }

        // Eventos internos
        private void txt_Enter(object sender, EventArgs e)
        {
            isFocused = true;
            Invalidate();
        }

        private void txt_Leave(object sender, EventArgs e)
        {
            isFocused = false;
            Invalidate();
        }
        private char _passwordChar = '\0';
        public char PasswordChar
        {
            get { return _passwordChar; }
            set
            {
                _passwordChar = value;
                txt.PasswordChar = value;
                txt.UseSystemPasswordChar = (value != '\0');
            }
        }

        public bool UseSystemPasswordChar
        {
            get { return txt.UseSystemPasswordChar; }
            set { txt.UseSystemPasswordChar = value; }
        }


        private void txt_KeyPress(object sender, KeyPressEventArgs e)
        {
            OnKeyPress(e);
        }

        private void txt_TextChanged(object sender, EventArgs e)
        {
            OnTextChanged(e);
        }

        private void picIcon_Click(object sender, EventArgs e)
        {
            if (IconClick != null)
                IconClick(this, e);
        }

        private void LvlTextbox_Resize(object sender, EventArgs e)
        {
            Redraw();
        }
    }
}