|
|
@@ -0,0 +1,208 @@
|
|
|
+using System;
|
|
|
+using System.Collections.Generic;
|
|
|
+using System.ComponentModel;
|
|
|
+using System.Threading;
|
|
|
+using Terminal.Gui;
|
|
|
+
|
|
|
+namespace UICatalog {
|
|
|
+ [ScenarioMetadata (Name: "BackgroundWorker", Description: "A persisting multi Toplevel BackgroundWorker threading")]
|
|
|
+ [ScenarioCategory ("Threading")]
|
|
|
+ [ScenarioCategory ("TopLevel")]
|
|
|
+ [ScenarioCategory ("Dialogs")]
|
|
|
+ [ScenarioCategory ("Controls")]
|
|
|
+ class BackgroundWorkerSample : Scenario {
|
|
|
+ public override void Run ()
|
|
|
+ {
|
|
|
+ Top.Dispose ();
|
|
|
+
|
|
|
+ Application.Run<MainApp> ();
|
|
|
+
|
|
|
+ Top.Dispose ();
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ public class MainApp : Toplevel {
|
|
|
+ private List<string> log = new List<string> ();
|
|
|
+ private ListView listLog;
|
|
|
+ private Dictionary<StagingUIController, BackgroundWorker> stagingWorkers;
|
|
|
+
|
|
|
+ public MainApp ()
|
|
|
+ {
|
|
|
+ var menu = new MenuBar (new MenuBarItem [] {
|
|
|
+ new MenuBarItem ("_Options", new MenuItem [] {
|
|
|
+ new MenuItem ("_Run Worker", "", () => RunWorker(), null, null, Key.CtrlMask | Key.R),
|
|
|
+ new MenuItem ("_Cancel Worker", "", () => CancelWorker(), null, null, Key.CtrlMask | Key.C),
|
|
|
+ null,
|
|
|
+ new MenuItem ("_Quit", "", () => Application.RequestStop (), null, null, Key.CtrlMask | Key.Q)
|
|
|
+ })
|
|
|
+ });
|
|
|
+ Add (menu);
|
|
|
+
|
|
|
+ var statusBar = new StatusBar (new [] {
|
|
|
+ new StatusItem(Key.CtrlMask | Key.Q, "~^Q~ Exit", () => Application.RequestStop()),
|
|
|
+ new StatusItem(Key.CtrlMask | Key.P, "~^R~ Run Worker", () => RunWorker()),
|
|
|
+ new StatusItem(Key.CtrlMask | Key.P, "~^C~ Cancel Worker", () => CancelWorker())
|
|
|
+ });
|
|
|
+ Add (statusBar);
|
|
|
+
|
|
|
+ var top = new Toplevel ();
|
|
|
+
|
|
|
+ top.Add (new Label ("Worker Log") {
|
|
|
+ X = Pos.Center (),
|
|
|
+ Y = 0
|
|
|
+ });
|
|
|
+
|
|
|
+ listLog = new ListView (log) {
|
|
|
+ X = 0,
|
|
|
+ Y = 2,
|
|
|
+ Width = Dim.Fill (),
|
|
|
+ Height = Dim.Fill ()
|
|
|
+ };
|
|
|
+ top.Add (listLog);
|
|
|
+ Add (top);
|
|
|
+ }
|
|
|
+
|
|
|
+ private void RunWorker ()
|
|
|
+ {
|
|
|
+ var stagingUI = new StagingUIController ();
|
|
|
+
|
|
|
+ var worker = new BackgroundWorker () { WorkerSupportsCancellation = true };
|
|
|
+
|
|
|
+ worker.DoWork += (s, e) => {
|
|
|
+ var stageResult = new List<string> ();
|
|
|
+ for (int i = 0; i < 500; i++) {
|
|
|
+ stageResult.Add (
|
|
|
+ $"Worker {i} started at {DateTime.UtcNow}");
|
|
|
+ e.Result = stageResult;
|
|
|
+ Thread.Sleep (1);
|
|
|
+ if (worker.CancellationPending) {
|
|
|
+ e.Cancel = true;
|
|
|
+ return;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ };
|
|
|
+
|
|
|
+ worker.RunWorkerCompleted += (s, e) => {
|
|
|
+ if (e.Error != null) {
|
|
|
+ // Failed
|
|
|
+ log.Add ($"Exception occurred {e.Error.Message} on Worker {stagingUI.StartStaging}.{stagingUI.StartStaging:fff} at {DateTime.UtcNow}");
|
|
|
+ listLog.SetNeedsDisplay ();
|
|
|
+ } else if (e.Cancelled) {
|
|
|
+ // Canceled
|
|
|
+ log.Add ($"Worker {stagingUI.StartStaging}.{stagingUI.StartStaging:fff} was canceled at {DateTime.UtcNow}!");
|
|
|
+ listLog.SetNeedsDisplay ();
|
|
|
+ } else {
|
|
|
+ // Passed
|
|
|
+ log.Add ($"Worker {stagingUI.StartStaging}.{stagingUI.StartStaging:fff} was completed at {DateTime.UtcNow}.");
|
|
|
+ listLog.SetNeedsDisplay ();
|
|
|
+ Application.Refresh ();
|
|
|
+ stagingUI.Load (e.Result as List<string>);
|
|
|
+ }
|
|
|
+ stagingWorkers.Remove (stagingUI);
|
|
|
+ };
|
|
|
+
|
|
|
+ Application.Run (stagingUI);
|
|
|
+
|
|
|
+ if (stagingUI.StartStaging != null) {
|
|
|
+ log.Add ($"Worker is started at {stagingUI.StartStaging}.{stagingUI.StartStaging:fff}");
|
|
|
+ listLog.SetNeedsDisplay ();
|
|
|
+ if (stagingWorkers == null) {
|
|
|
+ stagingWorkers = new Dictionary<StagingUIController, BackgroundWorker> ();
|
|
|
+ }
|
|
|
+ stagingWorkers.Add (stagingUI, worker);
|
|
|
+ worker.RunWorkerAsync ();
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ private void CancelWorker ()
|
|
|
+ {
|
|
|
+ if (stagingWorkers.Count == 0) {
|
|
|
+ log.Add ($"Worker is not running at {DateTime.UtcNow}!");
|
|
|
+ listLog.SetNeedsDisplay ();
|
|
|
+ return;
|
|
|
+ }
|
|
|
+
|
|
|
+ var eStaging = stagingWorkers.GetEnumerator ();
|
|
|
+ eStaging.MoveNext ();
|
|
|
+ var fStaging = eStaging.Current;
|
|
|
+ var stagingUI = fStaging.Key;
|
|
|
+ var worker = fStaging.Value;
|
|
|
+ worker.CancelAsync ();
|
|
|
+ log.Add ($"Worker {stagingUI.StartStaging}.{stagingUI.StartStaging:fff} is canceling at {DateTime.UtcNow}!");
|
|
|
+ listLog.SetNeedsDisplay ();
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ public class StagingUIController : Window {
|
|
|
+ private Label label;
|
|
|
+ private ListView listView;
|
|
|
+ private Button start;
|
|
|
+ private Button close;
|
|
|
+
|
|
|
+ public DateTime? StartStaging { get; private set; }
|
|
|
+
|
|
|
+ public StagingUIController ()
|
|
|
+ {
|
|
|
+ X = Pos.Center ();
|
|
|
+ Y = Pos.Center ();
|
|
|
+ Width = Dim.Percent (85);
|
|
|
+ Height = Dim.Percent (85);
|
|
|
+
|
|
|
+ ColorScheme = Colors.Dialog;
|
|
|
+ Modal = true;
|
|
|
+
|
|
|
+ Title = "Run Worker";
|
|
|
+
|
|
|
+ label = new Label ("Press start to do the work or close to exit.") {
|
|
|
+ X = Pos.Center (),
|
|
|
+ Y = 1,
|
|
|
+ ColorScheme = Colors.Dialog
|
|
|
+ };
|
|
|
+ Add (label);
|
|
|
+
|
|
|
+ listView = new ListView () {
|
|
|
+ X = 0,
|
|
|
+ Y = 2,
|
|
|
+ Width = Dim.Fill (),
|
|
|
+ Height = Dim.Fill (2)
|
|
|
+ };
|
|
|
+ Add (listView);
|
|
|
+
|
|
|
+ start = new Button ("Start") { IsDefault = true };
|
|
|
+ start.Clicked += () => {
|
|
|
+ StartStaging = DateTime.UtcNow;
|
|
|
+ Application.RequestStop ();
|
|
|
+ };
|
|
|
+ Add (start);
|
|
|
+
|
|
|
+ close = new Button ("Close");
|
|
|
+ close.Clicked += () => Application.RequestStop ();
|
|
|
+ Add (close);
|
|
|
+
|
|
|
+ LayoutStarted += (_) => {
|
|
|
+ var btnsWidth = start.Bounds.Width + close.Bounds.Width + 2 - 1;
|
|
|
+ var shiftLeft = Math.Max ((Bounds.Width - btnsWidth) / 2 - 2, 0);
|
|
|
+
|
|
|
+ shiftLeft += close.Bounds.Width + 1;
|
|
|
+ close.X = Pos.AnchorEnd (shiftLeft);
|
|
|
+ close.Y = Pos.AnchorEnd (1);
|
|
|
+
|
|
|
+ shiftLeft += start.Bounds.Width + 1;
|
|
|
+ start.X = Pos.AnchorEnd (shiftLeft);
|
|
|
+ start.Y = Pos.AnchorEnd (1);
|
|
|
+ };
|
|
|
+
|
|
|
+ }
|
|
|
+
|
|
|
+ public void Load (List<string> list)
|
|
|
+ {
|
|
|
+ var stagingUI = new StagingUIController ();
|
|
|
+ stagingUI.Title = $"Worker started at {StartStaging}.{StartStaging:fff}";
|
|
|
+ stagingUI.label.Text = "Work list:";
|
|
|
+ stagingUI.listView.SetSource (list);
|
|
|
+ stagingUI.start.Visible = false;
|
|
|
+
|
|
|
+ Application.Run (stagingUI);
|
|
|
+ }
|
|
|
+ }
|
|
|
+}
|
BDisp