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using Microsoft.Xna.Framework;
using System;
using System.Linq;
namespace V3.Widgets
{
/// <summary>
/// A menu that arranges widgets in two columns. All widgets in on column
/// are made the same size (the maximum widget size).
/// </summary>
// ReSharper disable once ClassNeverInstantiated.Global
public sealed class FormMenu : AbstractMenu
{
private const float PaddingInnerX = 10;
private const float PaddingOuterX = 10;
private const float PaddingInnerY = 10;
private const float PaddingOuterY = 10;
public FormMenu(GraphicsDeviceManager graphicsDeviceManager) : base(graphicsDeviceManager)
{
}
protected override Vector2 GetTotalSize()
{
var size = new Vector2(2 * PaddingOuterX, 2 * PaddingOuterY);
var maxXLeft = 0f;
var maxXRight = 0f;
for (var i = 0; i < Widgets.Count; i += 2)
{
maxXLeft = Math.Max(maxXLeft, Widgets[i].Size.X);
if (i + 1 < Widgets.Count)
{
maxXRight = Math.Max(maxXRight, Widgets[i + 1].Size.X);
size.Y += Math.Max(Widgets[i].Size.Y, Widgets[i + 1].Size.Y);
}
else
{
size.Y += Widgets[i].Size.Y;
}
if (i + 2 < Widgets.Count)
size.Y += PaddingInnerY;
}
size.X += maxXLeft + maxXRight + PaddingInnerX;
return size;
}
protected override void UpdateWidgetRelativePositions()
{
var y = PaddingOuterY;
for (var i = 0; i < Widgets.Count; i += 2)
{
var x = PaddingOuterX;
Widgets[i].Position = new Vector2(x, y);
if (i + 1 < Widgets.Count)
{
x += Widgets[i].Size.X;
x += PaddingInnerX;
Widgets[i + 1].Position = new Vector2(x, y);
y += Math.Max(Widgets[i].Size.Y, Widgets[i + 1].Size.Y);
}
else
{
y += Widgets[i].Size.Y;
}
y += PaddingInnerY;
}
}
protected override void UpdateWidgetSizes()
{
MakeWidgetsSameSize(Widgets.Where((w, i) => i % 2 == 0));
MakeWidgetsSameSize(Widgets.Where((w, i) => i % 2 == 1));
}
}
}
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