FireWalletCosmos/FireWalletLite/SplashScreen.cs

using System.Diagnostics;
using System.Drawing.Imaging;

namespace FireWallet;

public partial class SplashScreen : Form
{
    private bool close;
    private float opacity;
    private Bitmap splash;

    public SplashScreen(bool timer)
    {
        InitializeComponent();
        close = false;
        IsClosed = false;
    }

    public bool IsClosed { get; set; }

    private void SplashScreen_FormClosing(object sender, FormClosingEventArgs e)
    {
        if (!close) e.Cancel = true;
    }

    public void CloseSplash()
    {
        close = true;

        // Fade out
        timerIn.Stop();
        timerOut.Start();
    }

    private void label2_Click(object sender, EventArgs e)
    {
        var psi = new ProcessStartInfo
        {
            FileName = "https://nathan.woodburn.au",
            UseShellExecute = true
        };
        Process.Start(psi);
    }

    //new Bitmap(Properties.Resources.FWSplash);
    private void SplashScreen_Load(object sender, EventArgs e)
    {
        splash = pictureBoxNew.Image as Bitmap;
        pictureBoxNew.Visible = true;
        TransparencyKey = Color.FromArgb(0, 0, 0);
        pictureBoxNew.Invalidate();
    }

    public Image SetImageOpacity(Image image, float opacity)
    {
        try
        {
            var bmp = new Bitmap(image.Width, image.Height);
            using (var gfx = Graphics.FromImage(bmp))
            {
                var matrix = new ColorMatrix();
                matrix.Matrix33 = opacity;
                var attributes = new ImageAttributes();
                attributes.SetColorMatrix(matrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);
                gfx.DrawImage(image, new Rectangle(0, 0, bmp.Width, bmp.Height), 0, 0, image.Width, image.Height,
                    GraphicsUnit.Pixel, attributes);
            }

            return bmp;
        }
        catch
        {
            return null;
        }
    }

    private void timerIn_Tick(object sender, EventArgs e)
    {
        if (opacity >= 1)
        {
            timerIn.Stop();
            return;
        }

        opacity += 0.05f;
        pictureBoxNew.Image = SetImageOpacity(splash, opacity);
        pictureBoxNew.Invalidate();
    }

    private void timerOut_Tick(object sender, EventArgs e)
    {
        if (opacity <= 0)
        {
            timerOut.Stop();
            IsClosed = true;
            Close();
            return;
        }

        opacity -= 0.05f;
        pictureBoxNew.Image = SetImageOpacity(splash, opacity);
        pictureBoxNew.Invalidate();
    }
}