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using System;
using Microsoft.Xna.Framework;
namespace MonoGame.Extended.Gui.Controls
{
public enum Dock
{
Left, Right, Top, Bottom
}
public class DockPanel : LayoutControl
{
public override Size GetContentSize(IGuiContext context)
{
var size = new Size();
for (var i = 0; i < Items.Count; i++)
{
var control = Items[i];
var actualSize = control.CalculateActualSize(context);
if (LastChildFill && i == Items.Count - 1)
{
size.Width += actualSize.Width;
size.Height += actualSize.Height;
}
else
{
var dock = control.GetAttachedProperty(DockProperty) as Dock? ?? Dock.Left;
switch (dock)
{
case Dock.Left:
case Dock.Right:
size.Width += actualSize.Width;
break;
case Dock.Top:
case Dock.Bottom:
size.Height += actualSize.Height;
break;
default:
throw new ArgumentOutOfRangeException();
}
}
}
return size;
}
protected override void Layout(IGuiContext context, Rectangle rectangle)
{
for (var i = 0; i < Items.Count; i++)
{
var control = Items[i];
if (LastChildFill && i == Items.Count - 1)
{
PlaceControl(context, control, rectangle.X, rectangle.Y, rectangle.Width, rectangle.Height);
}
else
{
var actualSize = control.CalculateActualSize(context);
var dock = control.GetAttachedProperty(DockProperty) as Dock? ?? Dock.Left;
switch (dock)
{
case Dock.Left:
PlaceControl(context, control, rectangle.Left, rectangle.Top, actualSize.Width, rectangle.Height);
rectangle.X += actualSize.Width;
rectangle.Width -= actualSize.Width;
break;
case Dock.Right:
PlaceControl(context, control, rectangle.Right - actualSize.Width, rectangle.Top, actualSize.Width, rectangle.Height);
rectangle.Width -= actualSize.Width;
break;
case Dock.Top:
PlaceControl(context, control, rectangle.Left, rectangle.Top, rectangle.Width, actualSize.Height);
rectangle.Y += actualSize.Height;
rectangle.Height -= actualSize.Height;
break;
case Dock.Bottom:
PlaceControl(context, control, rectangle.Left, rectangle.Bottom - actualSize.Height, rectangle.Width, actualSize.Height);
rectangle.Height -= actualSize.Height;
break;
default:
throw new ArgumentOutOfRangeException();
}
}
}
}
public const string DockProperty = "Dock";
public override Type GetAttachedPropertyType(string propertyName)
{
if (string.Equals(DockProperty, propertyName, StringComparison.OrdinalIgnoreCase))
return typeof(Dock);
return base.GetAttachedPropertyType(propertyName);
}
public bool LastChildFill { get; set; } = true;
}
}
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