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using System.Collections.Generic;
using System.ComponentModel;
using AppKit;
namespace Xamarin.Forms.Platform.MacOS
{
public class TableViewRenderer : ViewRenderer<TableView, NSView>
{
const int DefaultRowHeight = 44;
internal NSTableView TableView { get; set; }
public override SizeRequest GetDesiredSize(double widthConstraint, double heightConstraint)
{
return Control.GetSizeRequest(widthConstraint, heightConstraint, DefaultRowHeight, DefaultRowHeight);
}
protected override void Dispose(bool disposing)
{
if (disposing)
{
var viewsToLookAt = new Stack<NSView>(Subviews);
while (viewsToLookAt.Count > 0)
{
var view = viewsToLookAt.Pop();
var viewCellRenderer = view as IVisualElementRenderer;
if (viewCellRenderer != null)
{
viewCellRenderer.Dispose();
}
else
{
foreach (var child in view.Subviews)
viewsToLookAt.Push(child);
}
}
}
base.Dispose(disposing);
}
protected virtual NSTableView CreateNSTableView(TableView list)
{
return new NSTableView().AsListViewLook();
}
protected override void OnElementChanged(ElementChangedEventArgs<TableView> e)
{
if (e.NewElement != null)
{
if (Control == null)
{
var scroller = new NSScrollView
{
AutoresizingMask = NSViewResizingMask.HeightSizable | NSViewResizingMask.WidthSizable,
DocumentView = TableView = CreateNSTableView(e.NewElement)
};
SetNativeControl(scroller);
}
SetSource();
UpdateRowHeight();
UpdateBackgroundView();
}
base.OnElementChanged(e);
}
protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
{
base.OnElementPropertyChanged(sender, e);
if (e.PropertyName == Xamarin.Forms.TableView.RowHeightProperty.PropertyName)
UpdateRowHeight();
else if (e.PropertyName == Xamarin.Forms.TableView.HasUnevenRowsProperty.PropertyName)
SetSource();
else if (e.PropertyName == VisualElement.BackgroundColorProperty.PropertyName)
UpdateBackgroundView();
}
void SetSource()
{
var modeledView = Element;
TableView.Source = modeledView.HasUnevenRows ? new UnEvenTableViewModelRenderer(this) : new TableViewDataSource(this);
}
void UpdateBackgroundView()
{
}
void UpdateRowHeight()
{
var rowHeight = Element.RowHeight;
TableView.RowHeight = rowHeight <= 0 ? DefaultRowHeight : rowHeight;
}
}
}
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