roketto-launch/source/Windows/Forms/TileLayoutPanel.cs

using System;
using System.ComponentModel;
using System.Drawing;
using System.Windows.Forms;
using RyzStudio.Windows.Forms;

namespace RokettoLaunch.Windows.Forms
{
    public class TileLayoutPanel : System.Windows.Forms.TableLayoutPanel
    {
        public const int MIN_COLUMNS = 4;
        public const int TILE_SIZE = 70;
        public const int TILE_PADDING = 3;


        public TileLayoutPanel() : base()
        {
            this.AllowDrop = true;
            this.Margin = new Padding(0);
            this.Padding = new Padding(0);
            this.ColumnCount = 0;
            this.RowCount = 0;
        }

        //protected override void OnDragOver(DragEventArgs e)
        //{
        //    base.OnDragDrop(e);

        //    e.Effect = (e.Data.GetDataPresent(DataFormats.FileDrop)) ? DragDropEffects.Link : DragDropEffects.None;
        //}

        protected override void OnDragEnter(DragEventArgs e)
        {
            base.OnDragEnter(e);

            if (e.Data.TryGetData<TilePanel>(out var data))
            {
                e.Effect = DragDropEffects.Move;
            }
            else if (e.Data.GetDataPresent(DataFormats.FileDrop))
            {
                e.Effect = DragDropEffects.Link;
            }
            else
            {
                e.Effect = DragDropEffects.None;
            }
        }


        [Browsable(false), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
        public Guid GroupId { get; set; } = Guid.Empty;


        public void AddTilePanel(TilePanel tilePanel, int x, int y)
        {
            UIControl.Invoke(this, (_) => this.Controls.Add(tilePanel, x, y));
        }

        public void SetGridSize(Size gridSize)
        {
            this.SetGridWidth(gridSize.Width);
            this.SetGridHeight(gridSize.Height);
        }

        public void SetGridWidth(int width)
        {
            width = Math.Max(MIN_COLUMNS, width);

            var diffColumns = width - this.ColumnCount;
            var tileWidth = (TILE_SIZE + TILE_PADDING);

            UIControl.Invoke(this, (x) =>
            {
                this.ColumnCount = width;
                this.Width = (width * tileWidth);

                // Resize columns
                if (diffColumns == 0)
                {
                    // Do nothing
                }
                else if (diffColumns > 0)
                {
                    for (var i = 0; i < diffColumns; i++)
                    {
                        this.ColumnStyles.Add(new ColumnStyle(SizeType.Absolute, tileWidth));
                    }
                }
                else
                {
                    for (var i = 0; i < (diffColumns * -1); i++)
                    {
                        this.ColumnStyles.RemoveAt((this.ColumnStyles.Count - 1));
                    }
                }

                // Update column width
                foreach (ColumnStyle column in this.ColumnStyles)
                {
                    column.SizeType = SizeType.Absolute;
                    column.Width = tileWidth;
                }
            });
        }

        public void SetGridHeight(int height)
        {
            var diffRows = height - this.RowCount;
            var tileHeight = (TILE_SIZE + TILE_PADDING);

            UIControl.Invoke(this, (x) =>
            {
                this.RowCount = height;
                this.Height = (height * tileHeight) + TILE_PADDING;

                // Resize rows
                if (diffRows == 0)
                {
                    // Do nothing
                }
                else if (diffRows > 0)
                {
                    for (var i = 0; i < diffRows; i++)
                    {
                        this.RowStyles.Add(new RowStyle(SizeType.Absolute, tileHeight));
                    }
                }
                else
                {
                    for (var i = 0; i < (diffRows * -1); i++)
                    {
                        this.RowStyles.RemoveAt((this.RowStyles.Count - 1));
                    }
                }

                // Update row height
                foreach (RowStyle row in this.RowStyles)
                {
                    row.SizeType = SizeType.Absolute;
                    row.Height = tileHeight;
                }
            });
        }

        public Point GetCellFromPoint(Point point)
        {
            var width = this.ClientSize.Width;
            var height = this.ClientSize.Height;

            var x = (int)((float)point.X / width * this.ColumnCount);
            var y = (int)((float)point.Y / height * this.RowCount);

            x = Math.Max(0, Math.Min(this.ColumnCount - 1, x));
            y = Math.Max(0, Math.Min(this.RowCount - 1, y));

            return new Point(x, y);
        }

    }
}