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using System;
using System.Collections.Generic;
using System.Windows;
using System.Windows.Controls;
using Xamarin.PropertyEditing.Drawing;
using Xamarin.PropertyEditing.ViewModels;
namespace Xamarin.PropertyEditing.Windows
{
/// <remarks>
/// While technically it might be reasonable for the template to be relative to the container, its not a scenario
/// we currently need so it's faster to cache the template in a global capacity. Container relative can be achieved
/// by putting a new instance of the selector
/// </remarks>
internal class EditorTreeSelector
: DataTemplateSelector
{
public object EditorTemplateKey { get; set; }
public object ParentTemplateKey { get; set; }
public override DataTemplate SelectTemplate (object item, DependencyObject container)
{
if (item is EditorViewModel) {
if (this.editorTemplate == null)
this.editorTemplate = (DataTemplate)((FrameworkElement)container).TryFindResource (EditorTemplateKey);
return this.editorTemplate;
}
if (this.parentTemplate == null)
this.parentTemplate = (DataTemplate)((FrameworkElement)container).TryFindResource (ParentTemplateKey);
return this.parentTemplate;
}
private DataTemplate editorTemplate, parentTemplate;
}
internal class GroupedEditorPropertySelector
: EditorPropertySelector
{
protected override bool TryGetTemplateType (Type type, out Type templateType)
{
if (TypeMap.TryGetValue (type, out templateType))
return true;
return base.TryGetTemplateType (type, out templateType);
}
private static readonly Dictionary<Type, Type> TypeMap = new Dictionary<Type, Type> {
{ typeof(BrushPropertyViewModel), typeof(BrushTabbedEditorControl) }
};
}
internal class EditorPropertySelector
: DataTemplateSelector
{
public override DataTemplate SelectTemplate (object item, DependencyObject container)
{
if (item != null) {
Type type = item.GetType ();
if (!TryGetTemplate (type, out DataTemplate template)) {
if (type.IsConstructedGenericType) {
type = type.GetGenericTypeDefinition ();
TryGetTemplate (type, out template);
}
}
if (template != null)
return template;
}
return base.SelectTemplate (item, container);
}
protected virtual bool TryGetTemplateType (Type type, out Type templateType)
{
return TypeMap.TryGetValue (type, out templateType);
}
private readonly Dictionary<Type, DataTemplate> templates = new Dictionary<Type, DataTemplate> ();
private bool TryGetTemplate (Type type, out DataTemplate template)
{
if (this.templates.TryGetValue (type, out template))
return true;
if (TryGetTemplateType (type, out Type controlType)) {
this.templates[type] = template = new DataTemplate (type) {
VisualTree = new FrameworkElementFactory (controlType)
};
return true;
}
return false;
}
private static readonly Dictionary<Type, Type> TypeMap = new Dictionary<Type, Type> {
{ typeof(StringPropertyViewModel), typeof(StringEditorControl) },
{ typeof(PropertyViewModel<bool?>), typeof(BoolEditorControl) },
{ typeof(NumericPropertyViewModel<>), typeof(NumericEditorControl) },
{ typeof(PointPropertyViewModel), typeof(PointEditorControl) },
{ typeof(SizePropertyViewModel), typeof(SizeEditorControl) },
{ typeof(ThicknessPropertyViewModel), typeof(ThicknessEditorControl) },
{ typeof(PredefinedValuesViewModel<>), typeof(EnumEditorControl) },
{ typeof(CombinablePropertyViewModel<>), typeof(CombinablePredefinedValuesEditor) },
{ typeof(BrushPropertyViewModel), typeof(BrushEditorControl) },
{ typeof(PropertyGroupViewModel), typeof(GroupEditorControl) },
{ typeof(ObjectPropertyViewModel), typeof(ObjectEditorControl) },
{ typeof(CollectionPropertyViewModel), typeof(CollectionEditor) },
};
}
}
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