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using System;
using System.Collections.Generic;
using AppKit;
using Foundation;
using Xamarin.PropertyEditing.ViewModels;
namespace Xamarin.PropertyEditing.Mac
{
internal class BindingObjectSelectorControl : NSView
{
internal class ObjectOutlineView : NSOutlineView
{
private IReadOnlyList<ObjectTreeElement> viewModel;
public IReadOnlyList<ObjectTreeElement> ViewModel {
get => this.viewModel;
set {
if (this.viewModel != value) {
this.viewModel = value;
var dataSource = new ObjectOutlineViewDataSource (this.viewModel);
Delegate = new ObjectOutlineViewDelegate (dataSource);
DataSource = dataSource;
}
if (this.viewModel != null) {
ReloadData ();
ExpandItem (null, true);
}
}
}
public ObjectOutlineView ()
{
Initialize ();
}
// Called when created from unmanaged code
public ObjectOutlineView (IntPtr handle) : base (handle)
{
Initialize ();
}
// Called when created directly from a XIB file
[Export ("initWithCoder:")]
public ObjectOutlineView (NSCoder coder) : base (coder)
{
Initialize ();
}
[Export ("validateProposedFirstResponder:forEvent:")]
public bool ValidateProposedFirstResponder (NSResponder responder, NSEvent forEvent)
{
return true;
}
public void Initialize ()
{
AutoresizingMask = NSViewResizingMask.WidthSizable;
HeaderView = null;
TranslatesAutoresizingMaskIntoConstraints = false;
}
}
internal class ObjectOutlineViewDelegate : NSOutlineViewDelegate
{
private ObjectOutlineViewDataSource dataSource;
public ObjectOutlineViewDelegate (ObjectOutlineViewDataSource dataSource)
{
this.dataSource = dataSource;
}
public override nfloat GetRowHeight (NSOutlineView outlineView, NSObject item)
{
return PropertyEditorControl.DefaultControlHeight;
}
public override NSView GetView (NSOutlineView outlineView, NSTableColumn tableColumn, NSObject item)
{
var labelContainer = (UnfocusableTextField)outlineView.MakeView ("type", this);
if (labelContainer == null) {
labelContainer = new UnfocusableTextField {
Identifier = "type",
};
}
var target = (item as NSObjectFacade).Target;
switch (target) {
case KeyValuePair<string, SimpleCollectionView> kvp:
labelContainer.StringValue = kvp.Key;
break;
case TypeInfo info:
labelContainer.StringValue = info.Name;
break;
default:
labelContainer.StringValue = "Type Not Supported";
break;
}
return labelContainer;
}
public override bool ShouldSelectItem (NSOutlineView outlineView, NSObject item)
{
var target = (item as NSObjectFacade).Target;
switch (target) {
case KeyValuePair<string, SimpleCollectionView> kvp:
return false;
case TypeInfo info:
return true;
default:
return false;
}
}
}
internal class ObjectOutlineViewDataSource : NSOutlineViewDataSource
{
public IReadOnlyList<ObjectTreeElement> ViewModel { get; }
internal ObjectOutlineViewDataSource (IReadOnlyList<ObjectTreeElement> viewModel)
{
if (viewModel == null)
throw new ArgumentNullException (nameof (viewModel));
ViewModel = viewModel;
}
public override nint GetChildrenCount (NSOutlineView outlineView, NSObject item)
{
var childCount = 0;
if (item == null) {
childCount = this.ViewModel != null ? this.ViewModel.Count () : 0;
} else {
var target = (item as NSObjectFacade).Target;
switch (target) {
case KeyValuePair<string, SimpleCollectionView> kvp:
childCount = kvp.Value.Count;
break;
case TypeInfo info:
childCount = 0;
break;
default:
childCount = 0;
break;
}
}
return childCount;
}
public override NSObject GetChild (NSOutlineView outlineView, nint childIndex, NSObject item)
{
object element;
if (item == null) {
element = this.ViewModel.ElementAt ((int)childIndex);
} else {
var target = (item as NSObjectFacade).Target;
switch (target) {
case KeyValuePair<string, SimpleCollectionView> kvp:
element = kvp.Value[(int)childIndex];
break;
case TypeInfo info:
element = info;
break;
default:
return null;
}
}
return new NSObjectFacade (element);
}
public override bool ItemExpandable (NSOutlineView outlineView, NSObject item)
{
var target = (item as NSObjectFacade).Target;
switch (target) {
case KeyValuePair<string, SimpleCollectionView> kvp:
return kvp.Value.Count > 0;
case TypeInfo info:
return false;
default:
return false;
}
}
}
internal ObjectOutlineView objectOutlineView;
internal BindingObjectSelectorControl (CreateBindingViewModel viewModel)
{
if (viewModel == null)
throw new ArgumentNullException (nameof (viewModel));
this.objectOutlineView = new ObjectOutlineView ();
TranslatesAutoresizingMaskIntoConstraints = false;
viewModel.PropertyChanged += (sender, e) => {
if (e.PropertyName == nameof (CreateBindingViewModel.ShowObjectSelector)) {
Hidden = !viewModel.ShowObjectSelector;
if (viewModel.ShowObjectSelector && viewModel.ObjectElementRoots != null) {
this.objectOutlineView.ViewModel = viewModel.ObjectElementRoots.Value;
};
}
};
}
}
}
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