60 lines
No EOL
1.6 KiB
C#
60 lines
No EOL
1.6 KiB
C#
using System;
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using JD.Threading;
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namespace JD.Controls
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{
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/// <summary>
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/// A helper to limit the number of calls to refresh method in the UI.
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/// It postpones the refresh on the MessageQueue so the task is executed only once for a lot of changes in the bound model.
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/// </summary>
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public class RefreshTask : WakeUpThreadBase
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{
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private readonly Action _refreshAction;
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private bool _disposed;
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public RefreshTask(Action refreshAction)
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{
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_refreshAction = refreshAction;
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}
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/// <summary>
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/// Closes the task to stop sending events and cancels the last remaining event.
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/// </summary>
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public void Dispose()
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{
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_disposed = true;
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}
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protected override void DoWork()
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{
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if (!_disposed)
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{
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_refreshAction();
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}
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}
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/// <summary>
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/// Executing the action on the message queue.
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/// </summary>
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protected override void QueueUserWorkItem(System.Threading.WaitCallback waitCallBack)
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{
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TeaBox.ObjectModel.Application.Main.Dispatcher.DispatchAsync(() => waitCallBack(null), forceAsync:true);
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}
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/// <summary>
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/// Invokes the refresh
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/// </summary>
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public void Refresh()
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{
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base.WakeUp();
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}
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/// <summary>
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/// Users should bind this method to an event.
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/// </summary>
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public void ModelChanged(object sender, EventArgs e)
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{
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Refresh();
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}
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}
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} |