60 lines
2.2 KiB
C#
60 lines
2.2 KiB
C#
using System;
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using System.Windows.Forms;
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using Dinah.Core.Windows.Forms;
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namespace LibationWinForms.BookLiberation
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{
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public partial class DownloadForm : Form
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{
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public DownloadForm()
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{
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InitializeComponent();
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progressLbl.Text = "";
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filenameLbl.Text = "";
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}
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// thread-safe UI updates
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public void UpdateFilename(string title) => filenameLbl.UIThread(() => filenameLbl.Text = title);
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public void DownloadProgressChanged(long BytesReceived, long? TotalBytesToReceive)
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{
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// this won't happen with download file. it will happen with download string
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if (!TotalBytesToReceive.HasValue || TotalBytesToReceive.Value <= 0)
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return;
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progressLbl.UIThread(() => progressLbl.Text = $"{BytesReceived:#,##0} of {TotalBytesToReceive.Value:#,##0}");
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var d = double.Parse(BytesReceived.ToString()) / double.Parse(TotalBytesToReceive.Value.ToString()) * 100.0;
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var i = int.Parse(Math.Truncate(d).ToString());
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progressBar1.UIThread(() => progressBar1.Value = i);
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lastDownloadProgress = DateTime.Now;
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}
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#region timer
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private Timer timer { get; } = new Timer { Interval = 1000 };
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private void DownloadForm_Load(object sender, EventArgs e)
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{
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timer.Tick += new EventHandler(timer_Tick);
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timer.Start();
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}
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private DateTime lastDownloadProgress = DateTime.Now;
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private void timer_Tick(object sender, EventArgs e)
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{
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// if no update in the last 30 seconds, display frozen label
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lastUpdateLbl.UIThread(() => lastUpdateLbl.Visible = lastDownloadProgress.AddSeconds(30) < DateTime.Now);
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if (lastUpdateLbl.Visible)
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{
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var diff = lastDownloadProgress - DateTime.Now;
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var min = (int)diff.TotalMinutes;
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var minText = min > 0 ? $"{min}min " : "";
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lastUpdateLbl.UIThread(() => lastUpdateLbl.Text = $"Frozen? Last download activity: {minText}{diff.Seconds}sec ago");
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}
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}
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private void DownloadForm_FormClosing(object sender, FormClosingEventArgs e) => timer.Stop();
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#endregion
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}
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}
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