Xin chào các bạn, bài viết hôm nay mình sẻ tiếp tục hướng dẫn các bạn tạo hiệu ứng Karaoke Text Effect trên lập trình C#, Winform.

[C#] Karaoke Text Effect

Dưới đây là hình ảnh giao diện demo ứng dụng:

Source code C#:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace KaraokeTextEffect
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            timer1.Start();
        }
        int percent = 0;
        private void timer1_Tick(object sender, EventArgs e)
        {
            ++percent;
            pictureBox1.Invalidate(); if (percent >= 100)
            {
                timer1.Stop();
            }
        }

        private void pictureBox1_Paint(object sender, PaintEventArgs e)
        {
            string text = "Karaoke Text Effect";
            var path = new GraphicsPath();
            path.AddString(text, new FontFamily("Tahoma"), (int)FontStyle.Regular, 80, new Point(10, 10), StringFormat.GenericDefault);
            e.Graphics.FillPath(new SolidBrush(Color.White), path);

            Region r = new Region(path);
            RectangleF rect = r.GetBounds(e.Graphics);
            RectangleF intersectRect = new RectangleF(rect.X, rect.Y, rect.Width * percent / 100, rect.Height);
            r.Intersect(intersectRect);
            e.Graphics.FillRegion(Brushes.Red, r);

            e.Graphics.DrawPath(new Pen(Color.Blue, 2), path);
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            Process.Start("https://laptrinhvb.net");
        }
    }
}

Thanks for watching!

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