Libation/LibationWinForms/BookLiberation/DecryptForm.cs

using System;
using System.Windows.Forms;
using Dinah.Core.Windows.Forms;

namespace LibationWinForms.BookLiberation
{
    public partial class DecryptForm : Form
    {
		public DecryptForm() => InitializeComponent();

        // book info
        private string title;
        private string authorNames;
        private string narratorNames;

        public void SetTitle(string actionName, string title)
        {
            this.UIThread(() => this.Text = actionName + " " + title);
            this.title = title;
            updateBookInfo();
        }
        public void SetAuthorNames(string authorNames)
        {
            this.authorNames = authorNames;
            updateBookInfo();
        }
        public void SetNarratorNames(string narratorNames)
        {
            this.narratorNames = narratorNames;
            updateBookInfo();
        }

        // thread-safe UI updates
        private void updateBookInfo()
            => bookInfoLbl.UIThread(() => bookInfoLbl.Text = $"{title}\r\nBy {authorNames}\r\nNarrated by {narratorNames}");

        public void SetCoverImage(System.Drawing.Image coverImage)
            => pictureBox1.UIThread(() => pictureBox1.Image = coverImage);

        public void UpdateProgress(int percentage)
        {
            if (percentage == 0)
                updateRemainingTime(0);
            else
                progressBar1.UIThread(() => progressBar1.Value = percentage);
        }

        public void UpdateRemainingTime(TimeSpan remaining)
            => updateRemainingTime((int)remaining.TotalSeconds);

        private void updateRemainingTime(int remaining)
            => remainingTimeLbl.UIThread(() => remainingTimeLbl.Text = $"ETA:\r\n{remaining} sec");
    }
}