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using System;
using System.Linq;
using Microsoft.Xna.Framework;
namespace MonoGame.Extended.Gui.Controls
{
public class UniformGrid : LayoutControl
{
public UniformGrid()
{
}
public int Columns { get; set; }
public int Rows { get; set; }
public override Size GetContentSize(IGuiContext context)
{
var columns = Columns == 0 ? (int)Math.Ceiling(Math.Sqrt(Items.Count)) : Columns;
var rows = Rows == 0 ? (int)Math.Ceiling((float)Items.Count / columns) : Rows;
var sizes = Items
.Select(control => control.CalculateActualSize(context))
.ToArray();
var minCellWidth = sizes.Max(s => s.Width);
var minCellHeight = sizes.Max(s => s.Height);
return new Size(minCellWidth * columns, minCellHeight * rows);
}
protected override void Layout(IGuiContext context, Rectangle rectangle)
{
var gridInfo = CalculateGridInfo(context, rectangle.Size);
var columnIndex = 0;
var rowIndex = 0;
var cellWidth = HorizontalAlignment == HorizontalAlignment.Stretch ? gridInfo.MaxCellWidth : gridInfo.MinCellWidth;
var cellHeight = VerticalAlignment == VerticalAlignment.Stretch ? gridInfo.MaxCellHeight : gridInfo.MinCellHeight;
foreach (var control in Items)
{
var x = columnIndex * cellWidth + rectangle.X;
var y = rowIndex * cellHeight + rectangle.Y;
PlaceControl(context, control, x, y, cellWidth, cellHeight);
columnIndex++;
if (columnIndex > gridInfo.Columns - 1)
{
columnIndex = 0;
rowIndex++;
}
}
}
private struct GridInfo
{
public float MinCellWidth;
public float MinCellHeight;
public float MaxCellWidth;
public float MaxCellHeight;
public float Columns;
public float Rows;
public Size2 MinCellSize => new Size2(MinCellWidth * Columns, MinCellHeight * Rows);
}
private GridInfo CalculateGridInfo(IGuiContext context, Size2 availableSize)
{
var columns = Columns == 0 ? (int)Math.Ceiling(Math.Sqrt(Items.Count)) : Columns;
var rows = Rows == 0 ? (int)Math.Ceiling((float)Items.Count / columns) : Rows;
var maxCellWidth = availableSize.Width / columns;
var maxCellHeight = availableSize.Height / rows;
var sizes = Items
.Select(control => control.CalculateActualSize(context)) // LayoutHelper.GetSizeWithMargins(control, context, new Size2(maxCellWidth, maxCellHeight)))
.ToArray();
var maxControlWidth = sizes.Length == 0 ? 0 : sizes.Max(s => s.Width);
var maxControlHeight = sizes.Length == 0 ? 0 : sizes.Max(s => s.Height);
return new GridInfo
{
Columns = columns,
Rows = rows,
MinCellWidth = Math.Min(maxControlWidth, maxCellWidth),
MinCellHeight = Math.Min(maxControlHeight, maxCellHeight),
MaxCellWidth = maxCellWidth,
MaxCellHeight = maxCellHeight
};
}
}
}
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