76 lines
2.7 KiB
C#
76 lines
2.7 KiB
C#
namespace Caliburn.Micro.Core {
|
|
using System;
|
|
using System.Collections.Generic;
|
|
|
|
/// <summary>
|
|
/// An implementation of <see cref="IConductor"/> that holds on to and activates only one item at a time.
|
|
/// </summary>
|
|
public partial class Conductor<T> : ConductorBaseWithActiveItem<T> where T: class {
|
|
/// <summary>
|
|
/// Activates the specified item.
|
|
/// </summary>
|
|
/// <param name="item">The item to activate.</param>
|
|
public override void ActivateItem(T item) {
|
|
if(item != null && item.Equals(ActiveItem)) {
|
|
if (IsActive) {
|
|
ScreenExtensions.TryActivate(item);
|
|
OnActivationProcessed(item, true);
|
|
}
|
|
return;
|
|
}
|
|
|
|
CloseStrategy.Execute(new[] { ActiveItem }, (canClose, items) => {
|
|
if(canClose)
|
|
ChangeActiveItem(item, true);
|
|
else OnActivationProcessed(item, false);
|
|
});
|
|
}
|
|
|
|
/// <summary>
|
|
/// Deactivates the specified item.
|
|
/// </summary>
|
|
/// <param name="item">The item to close.</param>
|
|
/// <param name="close">Indicates whether or not to close the item after deactivating it.</param>
|
|
public override void DeactivateItem(T item, bool close) {
|
|
if (item == null || !item.Equals(ActiveItem)) {
|
|
return;
|
|
}
|
|
|
|
CloseStrategy.Execute(new[] { ActiveItem }, (canClose, items) => {
|
|
if(canClose)
|
|
ChangeActiveItem(default(T), close);
|
|
});
|
|
}
|
|
|
|
/// <summary>
|
|
/// Called to check whether or not this instance can close.
|
|
/// </summary>
|
|
/// <param name="callback">The implementor calls this action with the result of the close check.</param>
|
|
public override void CanClose(Action<bool> callback) {
|
|
CloseStrategy.Execute(new[] { ActiveItem }, (canClose, items) => callback(canClose));
|
|
}
|
|
|
|
/// <summary>
|
|
/// Called when activating.
|
|
/// </summary>
|
|
protected override void OnActivate() {
|
|
ScreenExtensions.TryActivate(ActiveItem);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Called when deactivating.
|
|
/// </summary>
|
|
/// <param name="close">Inidicates whether this instance will be closed.</param>
|
|
protected override void OnDeactivate(bool close) {
|
|
ScreenExtensions.TryDeactivate(ActiveItem, close);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the children.
|
|
/// </summary>
|
|
/// <returns>The collection of children.</returns>
|
|
public override IEnumerable<T> GetChildren() {
|
|
return new[] { ActiveItem };
|
|
}
|
|
}
|
|
} |