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Progress indication when opening VLC
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,150 @@ | ||
| using System.Diagnostics; | ||
| using System.Runtime.InteropServices; | ||
| using J.Base; | ||
|
|
||
| namespace J.App; | ||
|
|
||
| public sealed partial class VlcLaunchProgressForm : Form | ||
| { | ||
| private readonly FlowLayoutPanel _flow; | ||
| private readonly Label _label; | ||
| private readonly ProgressBar _progressBar; | ||
| private readonly ProcessStartInfo _psi; | ||
|
|
||
| public VlcLaunchProgressForm(ProcessStartInfo psi) | ||
| { | ||
| _psi = psi; | ||
| Ui ui = new(this); | ||
|
|
||
| Controls.Add(_flow = ui.NewFlowColumn()); | ||
| { | ||
| _flow.Padding = ui.DefaultPadding; | ||
|
|
||
| _flow.Controls.Add(_label = ui.NewLabel("Opening movie...")); | ||
| { | ||
| _label.Margin += ui.BottomSpacingBig; | ||
| } | ||
|
|
||
| _flow.Controls.Add(_progressBar = ui.NewProgressBar(300)); | ||
| { | ||
| _progressBar.Style = ProgressBarStyle.Marquee; | ||
| _progressBar.MarqueeAnimationSpeed = 10; | ||
| } | ||
| } | ||
|
|
||
| Text = "VLC"; | ||
| StartPosition = FormStartPosition.CenterScreen; | ||
| AutoSize = true; | ||
| AutoSizeMode = AutoSizeMode.GrowAndShrink; | ||
| FormBorderStyle = FormBorderStyle.Fixed3D; | ||
| ControlBox = false; | ||
| MinimizeBox = false; | ||
| MaximizeBox = false; | ||
| ShowIcon = false; | ||
| ShowInTaskbar = false; | ||
| } | ||
|
|
||
| protected override async void OnShown(EventArgs e) | ||
| { | ||
| base.OnShown(e); | ||
|
|
||
| try | ||
| { | ||
| await Task.Run(() => | ||
| { | ||
| using var p = Process.Start(_psi)!; | ||
| ApplicationSubProcesses.Add(p); | ||
| WaitForWindow(p, TimeSpan.FromSeconds(10)); | ||
| }) | ||
| .ConfigureAwait(true); | ||
|
|
||
| Close(); | ||
| } | ||
| catch (Exception ex) | ||
| { | ||
| MessageBox.Show( | ||
| "Unable to launch VLC.\n\n" + ex.Message, | ||
| "Error", | ||
| MessageBoxButtons.OK, | ||
| MessageBoxIcon.Error | ||
| ); | ||
| Close(); | ||
| } | ||
| } | ||
|
|
||
| private static void WaitForWindow(Process process, TimeSpan timeout) | ||
| { | ||
| ArgumentNullException.ThrowIfNull(process); | ||
|
|
||
| if (process.HasExited) | ||
| return; | ||
|
|
||
| var sw = Stopwatch.StartNew(); | ||
|
|
||
| while (sw.Elapsed < timeout) | ||
| { | ||
| if (HasVisibleWindow(process)) | ||
| return; | ||
|
|
||
| Thread.Sleep(100); | ||
| } | ||
| } | ||
|
|
||
| private static bool HasVisibleWindow(Process process) | ||
| { | ||
| try | ||
| { | ||
| // Refresh the process info to get the current threads | ||
| process.Refresh(); | ||
|
|
||
| // Check each thread in the process | ||
| foreach (ProcessThread thread in process.Threads) | ||
| { | ||
| bool found = false; | ||
|
|
||
| // Enumerate windows for this thread | ||
| NativeMethods.EnumThreadWindows( | ||
| (uint)thread.Id, | ||
| (hWnd, lParam) => | ||
| { | ||
| if (NativeMethods.IsWindowVisible(hWnd)) | ||
| { | ||
| found = true; | ||
| return false; // Stop enumeration | ||
| } | ||
| return true; // Continue enumeration | ||
| }, | ||
| IntPtr.Zero | ||
| ); | ||
|
|
||
| if (found) | ||
| return true; | ||
| } | ||
| } | ||
| catch (InvalidOperationException) | ||
| { | ||
| // Process has exited or access was denied | ||
| return false; | ||
| } | ||
| catch (Exception) | ||
| { | ||
| // Handle any other unexpected errors gracefully | ||
| return false; | ||
| } | ||
|
|
||
| return false; | ||
| } | ||
|
|
||
| private static partial class NativeMethods | ||
| { | ||
| public delegate bool EnumThreadWindowsProc(IntPtr hWnd, IntPtr lParam); | ||
|
|
||
| [LibraryImport("user32.dll")] | ||
| [return: MarshalAs(UnmanagedType.Bool)] | ||
| public static partial bool EnumThreadWindows(uint threadId, EnumThreadWindowsProc enumFunc, IntPtr lParam); | ||
|
|
||
| [LibraryImport("user32.dll")] | ||
| [return: MarshalAs(UnmanagedType.Bool)] | ||
| public static partial bool IsWindowVisible(IntPtr hWnd); | ||
| } | ||
| } |