Color TabControl(C#)-优快云博客

本文介绍了一个自定义TabControl组件的方法，通过设置不同的颜色、字体及渐变角度等属性，实现了TabControl的个性化显示效果。

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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Text;
using System.Windows.Forms;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;

namespace wgscd
{
    public partial class myTabControl : TabControl
    {
        public myTabControl()
        {

InitializeComponent();
this.DrawMode = TabDrawMode.OwnerDrawFixed;//必须

SetStyle(ControlStyles.DoubleBuffer | ControlStyles.OptimizedDoubleBuffer | ControlStyles.AllPaintingInWmPaint, true);//避免闪烁
UpdateStyles();

}

        protected Color HeaderBackColor1 = Color.DarkGreen;
        protected Color HeaderBackColor2 = Color.DarkKhaki;
        protected float headerbackangle = 45;
        protected Color titlebackcolor1 = Color.Bisque;
        protected Color titlebackcolor2 = Color.Blue;
        protected float titlebackangle = 45;
        protected Font headerfont = new Font("Arial", 12, FontStyle.Bold);
        protected StringAlignment titlealignment = StringAlignment.Center;
        protected Color headerfontcolor = Color.Plum;
        protected Font focusedheaderfont = new Font("Arial", 11, FontStyle.Regular);
        protected Color focusedheaderfontcolor = Color.PowderBlue;

Rectangle r = new Rectangle(1, 1, 200, 200);

        protected override void OnPaint(PaintEventArgs e)//绘制整个TabControl控件背景不起作用。。。。。。。。。。。。
        {
            r = new Rectangle(0, 0, this.Width, this.Height);

            Brush b = new SolidBrush(Color.Azure);
            Graphics g = e.Graphics;
            g.FillRectangle(b, r);

// base.OnPaint(e);

}

protected override void OnDrawItem(DrawItemEventArgs e)
{

            Graphics g = e.Graphics;
            Rectangle endPageRect = GetTabRect(TabPages.Count - 1); //最后一个标题栏的范围
            Rectangle TitleRect = GetTabRect(e.Index);              //当前标题栏的范围
            Rectangle HeaderBackRect = Rectangle.Empty;             //背景区域

            switch (Alignment)
            {
                case TabAlignment.Top:
                    HeaderBackRect = new Rectangle(new Point(endPageRect.X + endPageRect.Width, endPageRect.Y),
                        new Size(Width - endPageRect.X - endPageRect.Width, endPageRect.Height));
                    break;
                case TabAlignment.Bottom:
                    HeaderBackRect = new Rectangle(new Point(endPageRect.X + endPageRect.Width, endPageRect.Y),
                        new Size(Width - endPageRect.X - endPageRect.Width, endPageRect.Height));
                    break;
                case TabAlignment.Left:
                    HeaderBackRect = new Rectangle(new Point(endPageRect.X, endPageRect.Y + endPageRect.Height),
                        new Size(endPageRect.Width, Height - endPageRect.Y - endPageRect.Height));
                    break;
                case TabAlignment.Right:
                    HeaderBackRect = new Rectangle(new Point(endPageRect.X, endPageRect.Y + endPageRect.Height),
                        new Size(endPageRect.Width, Height - endPageRect.Y - endPageRect.Height));
                    break;
            }

            Brush TitleBackBrush = new LinearGradientBrush(TitleRect, titlebackcolor1, titlebackcolor2, titlebackangle);            //渐变角度
            Font font = headerfont;
            StringFormat sf = new StringFormat();
            sf.Alignment = titlealignment;
            sf.LineAlignment = StringAlignment.Center;
            Color fontcolor = headerfontcolor;

            if (SelectedIndex == e.Index)    //如果绘制的标题就是选中的标题，则使用选中标题的字体，同时更新font和fontcolor
            {
                g.DrawRectangle(new Pen(TabPages[e.Index].BackColor), TitleRect);    //消除选中标题的矩形方框
                font = focusedheaderfont;
                fontcolor = focusedheaderfontcolor;

}

            Brush fontbrush = new SolidBrush(fontcolor);
            //绘制标题文本
            g.DrawString(TabPages[e.Index].Text, font, fontbrush, TitleRect, sf);

            //绘制背景
            if (HeaderBackRect != Rectangle.Empty)
            {
                Brush HeaderBackBrush = new LinearGradientBrush(HeaderBackRect, HeaderBackColor1, HeaderBackColor2, headerbackangle);
                g.FillRectangle(HeaderBackBrush, HeaderBackRect);
            }

// base.OnDrawItem(e);
}

}
}