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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,77 @@ | ||
| using FoxTunes.Interfaces; | ||
| using System; | ||
| using System.Linq; | ||
|
|
||
| namespace FoxTunes | ||
| { | ||
| public class PlaylistSearchBehaviour : StandardBehaviour | ||
| { | ||
| public IPlaylistManager PlaylistManager { get; private set; } | ||
|
|
||
| public IPlaylistBrowser PlaylistBrowser { get; private set; } | ||
|
|
||
| public override void InitializeComponent(ICore core) | ||
| { | ||
| this.PlaylistManager = core.Managers.Playlist; | ||
| this.PlaylistManager.FilterChanged += this.OnFilterChanged; | ||
| this.PlaylistBrowser = core.Components.PlaylistBrowser; | ||
| base.InitializeComponent(core); | ||
| } | ||
|
|
||
| protected virtual void OnFilterChanged(object sender, EventArgs e) | ||
| { | ||
| if (this.PlaylistManager.SelectedPlaylist == null || string.IsNullOrEmpty(this.PlaylistManager.Filter)) | ||
| { | ||
| return; | ||
| } | ||
| this.Dispatch(this.Search); | ||
| } | ||
|
|
||
| public void Search() | ||
| { | ||
| var playlistItems = this.PlaylistBrowser.GetItems(this.PlaylistManager.SelectedPlaylist, this.PlaylistManager.Filter); | ||
| if (playlistItems != null && playlistItems.Any()) | ||
| { | ||
| this.PlaylistManager.SelectedItems = playlistItems; | ||
| } | ||
| } | ||
|
|
||
| public bool IsDisposed { get; private set; } | ||
|
|
||
| public void Dispose() | ||
| { | ||
| this.Dispose(true); | ||
| GC.SuppressFinalize(this); | ||
| } | ||
|
|
||
| protected virtual void Dispose(bool disposing) | ||
| { | ||
| if (this.IsDisposed || !disposing) | ||
| { | ||
| return; | ||
| } | ||
| this.OnDisposing(); | ||
| this.IsDisposed = true; | ||
| } | ||
|
|
||
| protected virtual void OnDisposing() | ||
| { | ||
| if (this.PlaylistManager != null) | ||
| { | ||
| this.PlaylistManager.FilterChanged -= this.OnFilterChanged; | ||
| } | ||
| } | ||
|
|
||
| ~PlaylistSearchBehaviour() | ||
| { | ||
| try | ||
| { | ||
| this.Dispose(true); | ||
| } | ||
| catch | ||
| { | ||
| //Nothing can be done, never throw on GC thread. | ||
| } | ||
| } | ||
| } | ||
| } |
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110 changes: 110 additions & 0 deletions
110
FoxTunes.UI.Windows/Extensions/ListView_EnsureSelectedItemVisible.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,110 @@ | ||
| using System.Runtime.CompilerServices; | ||
| using System.Windows; | ||
| using System.Windows.Controls; | ||
|
|
||
| namespace FoxTunes | ||
| { | ||
| public static partial class ListViewExtensions | ||
| { | ||
| private static readonly ConditionalWeakTable<ListView, EnsureSelectedItemVisibleBehaviour> EnsureSelectedItemVisibleBehaviours = new ConditionalWeakTable<ListView, EnsureSelectedItemVisibleBehaviour>(); | ||
|
|
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| public static readonly DependencyProperty EnsureSelectedItemVisibleProperty = DependencyProperty.RegisterAttached( | ||
| "EnsureSelectedItemVisible", | ||
| typeof(bool), | ||
| typeof(ListViewExtensions), | ||
| new FrameworkPropertyMetadata(false, new PropertyChangedCallback(OnEnsureSelectedItemVisiblePropertyChanged)) | ||
| ); | ||
|
|
||
| public static bool GetEnsureSelectedItemVisible(ListView source) | ||
| { | ||
| return (bool)source.GetValue(EnsureSelectedItemVisibleProperty); | ||
| } | ||
|
|
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| public static void SetEnsureSelectedItemVisible(ListView source, bool value) | ||
| { | ||
| source.SetValue(EnsureSelectedItemVisibleProperty, value); | ||
| } | ||
|
|
||
| private static void OnEnsureSelectedItemVisiblePropertyChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e) | ||
| { | ||
| var listView = sender as ListView; | ||
| if (listView == null) | ||
| { | ||
| return; | ||
| } | ||
| if (GetEnsureSelectedItemVisible(listView)) | ||
| { | ||
| var behaviour = default(EnsureSelectedItemVisibleBehaviour); | ||
| if (!EnsureSelectedItemVisibleBehaviours.TryGetValue(listView, out behaviour)) | ||
| { | ||
| EnsureSelectedItemVisibleBehaviours.Add(listView, new EnsureSelectedItemVisibleBehaviour(listView)); | ||
| } | ||
| } | ||
| else | ||
| { | ||
| var behaviour = default(EnsureSelectedItemVisibleBehaviour); | ||
| if (EnsureSelectedItemVisibleBehaviours.TryGetValue(listView, out behaviour)) | ||
| { | ||
| EnsureSelectedItemVisibleBehaviours.Remove(listView); | ||
| behaviour.Dispose(); | ||
| } | ||
| } | ||
| } | ||
|
|
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| private class EnsureSelectedItemVisibleBehaviour : UIBehaviour | ||
| { | ||
| public EnsureSelectedItemVisibleBehaviour(ListView listView) | ||
| { | ||
| this.ListView = listView; | ||
| this.ListView.SelectionChanged += this.OnSelectionChanged; | ||
| } | ||
|
|
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| public ListView ListView { get; private set; } | ||
|
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| protected virtual void EnsureVisible(object value) | ||
| { | ||
| if (value == null) | ||
| { | ||
| return; | ||
| } | ||
| var index = this.ListView.Items.IndexOf(value); | ||
| if (index < 0) | ||
| { | ||
| return; | ||
| } | ||
| var scrollViewer = this.ListView.FindChild<ScrollViewer>(); | ||
| if (scrollViewer != null) | ||
| { | ||
| if (scrollViewer.ScrollToItemOffset<ListViewItem>(index, this.OnItemLoaded)) | ||
| { | ||
| this.ListView.UpdateLayout(); | ||
| } | ||
| } | ||
| var item = this.ListView.ItemContainerGenerator.ContainerFromItem(value) as ListViewItem; | ||
| if (item != null) | ||
| { | ||
| item.BringIntoView(); | ||
| } | ||
| } | ||
|
|
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| protected virtual void OnItemLoaded(object sender, RoutedEventArgs e) | ||
| { | ||
| this.EnsureVisible(this.ListView.SelectedItem); | ||
| } | ||
|
|
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| protected virtual void OnSelectionChanged(object sender, SelectionChangedEventArgs e) | ||
| { | ||
| this.EnsureVisible(this.ListView.SelectedItem); | ||
| } | ||
|
|
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| protected override void OnDisposing() | ||
| { | ||
| if (this.ListView != null) | ||
| { | ||
| this.ListView.SelectionChanged -= this.OnSelectionChanged; | ||
| } | ||
| base.OnDisposing(); | ||
| } | ||
| } | ||
| } | ||
| } |
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