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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Media.Animation;
using Tango.Editors;
namespace Tango.Editors
{
/// <summary>
/// Represents an <see cref="ElementsEditor"/> undo/redo states provider.
/// </summary>
/// <seealso cref="Tango.Editors.UndoRedoStatesProviderBase" />
public class ElementsEditorUndoRedoStatesProvider : UndoRedoStatesProviderBase
{
private ElementsEditorUndoRedoExecutedEventArgs args;
/// <summary>
/// Gets or sets the elements editor.
/// </summary>
public ElementsEditor ElementsEditor { get; private set; }
/// <summary>
/// Initializes a new instance of the <see cref="ElementsEditorUndoRedoStatesProvider"/> class.
/// </summary>
/// <param name="editor">The editor.</param>
public ElementsEditorUndoRedoStatesProvider(ElementsEditor editor)
{
ElementsEditor = editor;
}
/// <summary>
/// Creates the a new undo/redo state.
/// </summary>
/// <returns></returns>
public override IUndoRedoState CreateUndoRedoState()
{
ElementsEditorUndoRedoState state = new ElementsEditorUndoRedoState();
foreach (var element in ElementsEditor.Elements)
{
var setups = element.GetAnimationSetups(TimeSpan.FromSeconds(0), AnimationSetupMode.Discrete);
state.Date = DateTime.Now;
state.ElementsSetups.Add(new KeyValuePair<IElementEditor, List<AnimationSetup>>(element, setups));
}
return state;
}
/// <summary>
/// Executes the an undo/redo state.
/// </summary>
/// <param name="state">The state.</param>
public override void ExecuteState(IUndoRedoState state)
{
ElementsEditorUndoRedoState elementsEditorState = state as ElementsEditorUndoRedoState;
args = new ElementsEditorUndoRedoExecutedEventArgs();
args.State = elementsEditorState;
foreach (var elementSetups in elementsEditorState.ElementsSetups)
{
var element = elementSetups.Key;
var setups = elementSetups.Value;
if (!ElementsEditor.Elements.Contains(element)) //Add elements missing on editor.
{
ElementsEditor.Elements.Add(element);
args.RestoredElements.Add(element);
}
Storyboard story = new Storyboard();
foreach (var setup in setups)
{
story.Children.Add(setup.Animation);
String name = UIHelper.GetRandomAnimationName();
ElementsEditor.RegisterName(name, setup.DependencyObject);
Storyboard.SetTargetName(setup.Animation, name);
Storyboard.SetTargetProperty(setup.Animation, new System.Windows.PropertyPath(setup.DependencyProperty));
}
story.Completed += (x, y) =>
{
List<KeyValuePair<AnimationSetup, object>> setupValues = new List<KeyValuePair<AnimationSetup, object>>();
foreach (var setup in setups)
{
KeyValuePair<AnimationSetup, object> setupvalue = new KeyValuePair<AnimationSetup, object>(setup, setup.DependencyObject.GetValue(setup.DependencyProperty));
setupValues.Add(setupvalue);
}
foreach (var setupValue in setupValues)
{
if (setupValue.Key.DependencyObject is IAnimatable)
{
(setupValue.Key.DependencyObject as IAnimatable).BeginAnimation(setupValue.Key.DependencyProperty, null);
}
setupValue.Key.DependencyObject.SetValue(setupValue.Key.DependencyProperty, setupValue.Value);
}
};
story.Duration = TimeSpan.FromMilliseconds(10);
story.Begin(ElementsEditor);
}
//Remove elements that does not exist on state.
var elementsToRemove = ElementsEditor.Elements.Where(x => !elementsEditorState.ElementsSetups.Select(y => y.Key).ToList().Contains(x)).ToList();
elementsToRemove.ForEach(x =>
{
ElementsEditor.RemoveElement(x);
});
args.RemovedElements = elementsToRemove;
args.ModifiedElements = elementsEditorState.ElementsSetups.
Select(x => x.Key).
ToList().
Where(x => !args.RestoredElements.Contains(x) && !args.RemovedElements.Contains(x)).ToList();
}
/// <summary>
/// Raises the <see cref="E:StateExecuted" /> event.
/// </summary>
/// <param name="e">The <see cref="T:Tango.Editors.UndoRedoStateExecutedEventArgs" /> instance containing the event data.</param>
public override void OnStateExecuted(UndoRedoStateExecutedEventArgs e)
{
args.Mode = e.Mode;
base.OnStateExecuted(args);
}
}
}
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