139 lines
4.0 KiB
C#
139 lines
4.0 KiB
C#
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using System.Windows.Controls.Primitives;
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// ReSharper disable once CheckNamespace
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namespace WPFluent.Controls;
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/// <summary>
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/// Represents a control that creates a pop-up window that displays information for an element in the interface.
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/// </summary>
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[TemplatePart(Name = "PART_Popup", Type = typeof(Popup))]
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public class Flyout : System.Windows.Controls.ContentControl
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{
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private const string ElementPopup = "PART_Popup";
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/// <summary>
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/// Identifies the <see cref="Closed"/> routed event.
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/// </summary>
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public static readonly RoutedEvent ClosedEvent = EventManager.RegisterRoutedEvent(
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nameof(Closed),
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RoutingStrategy.Bubble,
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typeof(TypedEventHandler<Flyout, RoutedEventArgs>),
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typeof(Flyout));
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/// <summary>
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/// Identifies the <see cref="IsOpen"/> dependency property.
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/// </summary>
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public static readonly DependencyProperty IsOpenProperty = DependencyProperty.Register(
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nameof(IsOpen),
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typeof(bool),
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typeof(Flyout),
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new PropertyMetadata(false));
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/// <summary>
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/// Identifies the <see cref="Opened"/> routed event.
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/// </summary>
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public static readonly RoutedEvent OpenedEvent = EventManager.RegisterRoutedEvent(
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nameof(Opened),
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RoutingStrategy.Bubble,
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typeof(TypedEventHandler<Flyout, RoutedEventArgs>),
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typeof(Flyout));
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/// <summary>
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/// Identifies the <see cref="Placement"/> dependency property.
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/// </summary>
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public static readonly DependencyProperty PlacementProperty = DependencyProperty.Register(
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nameof(Placement),
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typeof(PlacementMode),
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typeof(Flyout),
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new PropertyMetadata(PlacementMode.Top));
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private Popup _popup = default;
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/// <summary>
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/// Event triggered when <see cref="Flyout"/> is opened.
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/// </summary>
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public event TypedEventHandler<Flyout, RoutedEventArgs> Closed
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{
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add => AddHandler(ClosedEvent, value);
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remove => RemoveHandler(ClosedEvent, value);
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}
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/// <summary>
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/// Event triggered when <see cref="Flyout"/> is opened.
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/// </summary>
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public event TypedEventHandler<Flyout, RoutedEventArgs> Opened
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{
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add => AddHandler(OpenedEvent, value);
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remove => RemoveHandler(OpenedEvent, value);
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}
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protected virtual void OnPopupClosed(object sender, EventArgs e)
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{
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Hide();
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RaiseEvent(new RoutedEventArgs(ClosedEvent, this));
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}
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protected virtual void OnPopupOpened(object sender, EventArgs e)
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{ RaiseEvent(new RoutedEventArgs(OpenedEvent, this)); }
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public void Hide()
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{
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if(IsOpen)
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{
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SetCurrentValue(IsOpenProperty, false);
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}
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}
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/// <summary>
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/// Invoked whenever application code or an internal process, such as a rebuilding layout pass, calls the
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/// ApplyTemplate method.
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/// </summary>
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public override void OnApplyTemplate()
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{
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base.OnApplyTemplate();
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_popup = GetTemplateChild(ElementPopup) as Popup;
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if(_popup is null)
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{
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return;
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}
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_popup.Opened -= OnPopupOpened;
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_popup.Opened += OnPopupOpened;
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_popup.Closed -= OnPopupClosed;
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_popup.Closed += OnPopupClosed;
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}
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public void Show()
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{
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if(!IsOpen)
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{
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SetCurrentValue(IsOpenProperty, true);
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}
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}
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/// <summary>
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/// Gets or sets a value indicating whether a <see cref="Flyout"/> is visible.
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/// </summary>
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public bool IsOpen { get => (bool)GetValue(IsOpenProperty); set => SetValue(IsOpenProperty, value); }
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/// <summary>
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/// Gets or sets the orientation of the <see cref="Flyout"/> control when the control opens, and specifies the
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/// behavior of the <see cref="T:System.Windows.Controls.Primitives.Popup"/> control when it overlaps screen
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/// boundaries.
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/// </summary>
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[Bindable(true)]
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[Category("Layout")]
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public PlacementMode Placement
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{
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get => (PlacementMode)GetValue(PlacementProperty);
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set => SetValue(PlacementProperty, value);
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}
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}
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