// BitmapFontEd
// Copyright (C) 2005  Ian Cowburn
// 
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
//
// $Id$
//
using System;
using System.ComponentModel;
using System.Windows.Forms;
using System.Drawing;
using System.Drawing.Drawing2D;

using System.Diagnostics;

namespace BitmapFontEd
{
	/// <summary>
	/// Implements a control for drawing
	/// </summary>
	[ToolboxItem(true)]
	public class GfxEditor : System.Windows.Forms.UserControl
	{
		private System.Windows.Forms.Label m_fgPreview;
		private System.Windows.Forms.ComboBox m_modeList;
		private System.Windows.Forms.PictureBox m_edit;
		private System.Windows.Forms.Label m_recent1;
		private System.Windows.Forms.Label label11;
		private System.Windows.Forms.Label m_recent4;
		private System.Windows.Forms.Label m_recent5;
		private System.Windows.Forms.Label m_recent6;
		private System.Windows.Forms.Label m_recent7;
		private System.Windows.Forms.Label m_bgPreview;
		private System.Windows.Forms.Label m_recent2;
		private System.Windows.Forms.NumericUpDown m_sizeY;
		private System.Windows.Forms.PictureBox m_preview;
		private System.Windows.Forms.Label label12;
		private System.Windows.Forms.Label label13;
		private System.Windows.Forms.Label m_pos;
		private System.Windows.Forms.Label m_recent3;
		private System.Windows.Forms.Label label14;
		private System.Windows.Forms.Label label15;
		private System.Windows.Forms.Button m_undoButton;
		private System.Windows.Forms.Label label3;
		private System.Windows.Forms.Label label2;
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.NumericUpDown m_sizeX;
		private System.Windows.Forms.Label label7;
		private System.Windows.Forms.Label label6;
		private System.Windows.Forms.Label label5;
		private System.Windows.Forms.Label label4;
		private System.Windows.Forms.Label m_recent8;
		
		private const uint	SIZE=256;
		private Color		TRANS=Color.Empty;

		// These MUST match the entries in the drop down list
		//
		private enum Mode
		{
			ePlot,
			eLine,
			eRectangle,
			eFilledRectangle,
			eCircle,
			eFilledCircle,
			eEllipse,
			eFilledEllipse,
			eFloodFill,
			eCopyPaste
		};

		//private bool		m_inEditor;
		
		private BitmapChar	m_char;
		private BitmapChar	m_undo;
		private uint		m_width;
		private uint		m_height;
		
		private Rectangle	m_editRect;
		private Bitmap		m_editBmp;
		private Rectangle	m_prevRect;
		private Bitmap		m_prevBmp;
		
		private uint		m_grid;
		private uint		m_mx;
		private uint		m_my;
		private Color		m_gridCol;
		
		private bool		m_drawing;
		private Mode		m_mode;
		private Color[,]	m_overlay;
		private uint		m_ox;
		private uint		m_oy;
		private Color		m_pen;
		
		private CopyMenu	m_cpMenu;
		private uint		m_cpX;
		private uint		m_cpY;
		private uint		m_cpWidth;
		private uint		m_cpHeight;
		private Color[,]	m_cpBuff;
		
		private Label[]		m_recent;
		
		public GfxEditor()
		{
			//
			// InitializeComponent() call is required for Windows Forms designer support.
			//
			InitializeComponent();
			
			//m_inEditor=false;
			
			m_char=null;
			m_grid=8;
			m_grid=8;
			m_mx=SIZE;
			m_my=SIZE;
			m_gridCol=Color.LightGreen;
			
			m_editRect=m_edit.ClientRectangle;
			m_editBmp=new Bitmap(m_editRect.Width,m_editRect.Height);
			m_edit.Image=m_editBmp;

			m_prevRect=m_edit.ClientRectangle;
			m_prevBmp=new Bitmap(m_prevRect.Width,m_prevRect.Height);
			m_preview.Image=m_prevBmp;
			
			m_drawing=false;
			m_mode=Mode.ePlot;
			
			if (m_editRect.Width!=SIZE && m_editRect.Height!=SIZE)
			{
				throw new Exception("GfxEditor built with bad SIZE!");
			}

			m_modeList.SelectedIndex=0;
			
			m_cpMenu=new CopyMenu();
			
			m_recent=new Label[]
				{m_recent1,m_recent2,m_recent3,m_recent4,
				 m_recent5,m_recent6,m_recent7,m_recent8};
		}
		
		#region Windows Forms Designer generated code
		/// <summary>
		/// This method is required for Windows Forms designer support.
		/// Do not change the method contents inside the source code editor. The Forms designer might
		/// not be able to load this method if it was changed manually.
		/// </summary>
		private void InitializeComponent() {
			this.m_recent8 = new System.Windows.Forms.Label();
			this.label4 = new System.Windows.Forms.Label();
			this.label5 = new System.Windows.Forms.Label();
			this.label6 = new System.Windows.Forms.Label();
			this.label7 = new System.Windows.Forms.Label();
			this.m_sizeX = new System.Windows.Forms.NumericUpDown();
			this.label1 = new System.Windows.Forms.Label();
			this.label2 = new System.Windows.Forms.Label();
			this.label3 = new System.Windows.Forms.Label();
			this.m_undoButton = new System.Windows.Forms.Button();
			this.label15 = new System.Windows.Forms.Label();
			this.label14 = new System.Windows.Forms.Label();
			this.m_recent3 = new System.Windows.Forms.Label();
			this.m_pos = new System.Windows.Forms.Label();
			this.label13 = new System.Windows.Forms.Label();
			this.label12 = new System.Windows.Forms.Label();
			this.m_preview = new System.Windows.Forms.PictureBox();
			this.m_sizeY = new System.Windows.Forms.NumericUpDown();
			this.m_recent2 = new System.Windows.Forms.Label();
			this.m_bgPreview = new System.Windows.Forms.Label();
			this.m_recent7 = new System.Windows.Forms.Label();
			this.m_recent6 = new System.Windows.Forms.Label();
			this.m_recent5 = new System.Windows.Forms.Label();
			this.m_recent4 = new System.Windows.Forms.Label();
			this.label11 = new System.Windows.Forms.Label();
			this.m_recent1 = new System.Windows.Forms.Label();
			this.m_edit = new System.Windows.Forms.PictureBox();
			this.m_modeList = new System.Windows.Forms.ComboBox();
			this.m_fgPreview = new System.Windows.Forms.Label();
			((System.ComponentModel.ISupportInitialize)(this.m_sizeX)).BeginInit();
			((System.ComponentModel.ISupportInitialize)(this.m_sizeY)).BeginInit();
			this.SuspendLayout();
			// 
			// m_recent8
			// 
			this.m_recent8.BackColor = System.Drawing.Color.Black;
			this.m_recent8.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
			this.m_recent8.Location = new System.Drawing.Point(352, 272);
			this.m_recent8.Name = "m_recent8";
			this.m_recent8.Size = new System.Drawing.Size(16, 16);
			this.m_recent8.TabIndex = 32;
			this.m_recent8.MouseUp += new System.Windows.Forms.MouseEventHandler(this.OnRecent);
			// 
			// label4
			// 
			this.label4.Location = new System.Drawing.Point(280, 96);
			this.label4.Name = "label4";
			this.label4.Size = new System.Drawing.Size(32, 16);
			this.label4.TabIndex = 10;
			this.label4.Text = "Left";
			this.label4.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
			// 
			// label5
			// 
			this.label5.Location = new System.Drawing.Point(336, 96);
			this.label5.Name = "label5";
			this.label5.Size = new System.Drawing.Size(40, 16);
			this.label5.TabIndex = 12;
			this.label5.Text = "Right";
			this.label5.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
			// 
			// label6
			// 
			this.label6.Location = new System.Drawing.Point(336, 8);
			this.label6.Name = "label6";
			this.label6.Size = new System.Drawing.Size(48, 16);
			this.label6.TabIndex = 22;
			this.label6.Text = "Height";
			this.label6.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
			// 
			// label7
			// 
			this.label7.Location = new System.Drawing.Point(280, 232);
			this.label7.Name = "label7";
			this.label7.Size = new System.Drawing.Size(88, 16);
			this.label7.TabIndex = 24;
			this.label7.Text = "Recent Colours";
			this.label7.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
			// 
			// m_sizeX
			// 
			this.m_sizeX.CausesValidation = false;
			this.m_sizeX.Location = new System.Drawing.Point(280, 24);
			this.m_sizeX.Maximum = new System.Decimal(new int[] {
						32,
						0,
						0,
						0});
			this.m_sizeX.Minimum = new System.Decimal(new int[] {
						1,
						0,
						0,
						0});
			this.m_sizeX.Name = "m_sizeX";
			this.m_sizeX.ReadOnly = true;
			this.m_sizeX.Size = new System.Drawing.Size(48, 21);
			this.m_sizeX.TabIndex = 19;
			this.m_sizeX.Value = new System.Decimal(new int[] {
						1,
						0,
						0,
						0});
			this.m_sizeX.ValueChanged += new System.EventHandler(this.OnSizeWidth);
			this.m_sizeX.Leave += new System.EventHandler(this.OnSizeWidth);
			// 
			// label1
			// 
			this.label1.Location = new System.Drawing.Point(280, 48);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(64, 16);
			this.label1.TabIndex = 3;
			this.label1.Text = "Draw Mode";
			this.label1.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
			// 
			// label2
			// 
			this.label2.Location = new System.Drawing.Point(280, 160);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(56, 16);
			this.label2.TabIndex = 21;
			this.label2.Text = "Preview";
			this.label2.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
			// 
			// label3
			// 
			this.label3.Location = new System.Drawing.Point(280, 8);
			this.label3.Name = "label3";
			this.label3.Size = new System.Drawing.Size(48, 16);
			this.label3.TabIndex = 8;
			this.label3.Text = "Width";
			this.label3.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
			// 
			// m_undoButton
			// 
			this.m_undoButton.Location = new System.Drawing.Point(8, 272);
			this.m_undoButton.Name = "m_undoButton";
			this.m_undoButton.Size = new System.Drawing.Size(72, 24);
			this.m_undoButton.TabIndex = 16;
			this.m_undoButton.Text = "Undo";
			this.m_undoButton.Click += new System.EventHandler(this.OnUndo);
			// 
			// label15
			// 
			this.label15.Location = new System.Drawing.Point(0, 0);
			this.label15.Name = "label15";
			this.label15.TabIndex = 0;
			// 
			// label14
			// 
			this.label14.BackColor = System.Drawing.Color.White;
			this.label14.Location = new System.Drawing.Point(152, 144);
			this.label14.Name = "label14";
			this.label14.Size = new System.Drawing.Size(16, 16);
			this.label14.TabIndex = 29;
			// 
			// m_recent3
			// 
			this.m_recent3.BackColor = System.Drawing.Color.Black;
			this.m_recent3.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
			this.m_recent3.Location = new System.Drawing.Point(328, 248);
			this.m_recent3.Name = "m_recent3";
			this.m_recent3.Size = new System.Drawing.Size(16, 16);
			this.m_recent3.TabIndex = 27;
			this.m_recent3.MouseUp += new System.Windows.Forms.MouseEventHandler(this.OnRecent);
			// 
			// m_pos
			// 
			this.m_pos.Location = new System.Drawing.Point(160, 272);
			this.m_pos.Name = "m_pos";
			this.m_pos.Size = new System.Drawing.Size(104, 24);
			this.m_pos.TabIndex = 23;
			this.m_pos.TextAlign = System.Drawing.ContentAlignment.TopRight;
			// 
			// label13
			// 
			this.label13.BackColor = System.Drawing.Color.White;
			this.label13.Location = new System.Drawing.Point(176, 144);
			this.label13.Name = "label13";
			this.label13.Size = new System.Drawing.Size(16, 16);
			this.label13.TabIndex = 30;
			// 
			// label12
			// 
			this.label12.BackColor = System.Drawing.Color.White;
			this.label12.Location = new System.Drawing.Point(200, 144);
			this.label12.Name = "label12";
			this.label12.Size = new System.Drawing.Size(16, 16);
			this.label12.TabIndex = 31;
			// 
			// m_preview
			// 
			this.m_preview.BackColor = System.Drawing.SystemColors.Control;
			this.m_preview.Location = new System.Drawing.Point(288, 184);
			this.m_preview.Name = "m_preview";
			this.m_preview.Size = new System.Drawing.Size(34, 34);
			this.m_preview.TabIndex = 1;
			this.m_preview.TabStop = false;
			// 
			// m_sizeY
			// 
			this.m_sizeY.CausesValidation = false;
			this.m_sizeY.Location = new System.Drawing.Point(336, 24);
			this.m_sizeY.Maximum = new System.Decimal(new int[] {
						32,
						0,
						0,
						0});
			this.m_sizeY.Minimum = new System.Decimal(new int[] {
						1,
						0,
						0,
						0});
			this.m_sizeY.Name = "m_sizeY";
			this.m_sizeY.ReadOnly = true;
			this.m_sizeY.Size = new System.Drawing.Size(48, 21);
			this.m_sizeY.TabIndex = 20;
			this.m_sizeY.Value = new System.Decimal(new int[] {
						1,
						0,
						0,
						0});
			this.m_sizeY.ValueChanged += new System.EventHandler(this.OnSizeHeight);
			this.m_sizeY.Leave += new System.EventHandler(this.OnSizeHeight);
			// 
			// m_recent2
			// 
			this.m_recent2.BackColor = System.Drawing.Color.Black;
			this.m_recent2.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
			this.m_recent2.Location = new System.Drawing.Point(304, 248);
			this.m_recent2.Name = "m_recent2";
			this.m_recent2.Size = new System.Drawing.Size(16, 16);
			this.m_recent2.TabIndex = 26;
			this.m_recent2.MouseUp += new System.Windows.Forms.MouseEventHandler(this.OnRecent);
			// 
			// m_bgPreview
			// 
			this.m_bgPreview.BackColor = System.Drawing.Color.Black;
			this.m_bgPreview.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
			this.m_bgPreview.Location = new System.Drawing.Point(336, 112);
			this.m_bgPreview.Name = "m_bgPreview";
			this.m_bgPreview.Size = new System.Drawing.Size(40, 40);
			this.m_bgPreview.TabIndex = 18;
			this.m_bgPreview.Click += new System.EventHandler(this.OnBackground);
			// 
			// m_recent7
			// 
			this.m_recent7.BackColor = System.Drawing.Color.Black;
			this.m_recent7.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
			this.m_recent7.Location = new System.Drawing.Point(328, 272);
			this.m_recent7.Name = "m_recent7";
			this.m_recent7.Size = new System.Drawing.Size(16, 16);
			this.m_recent7.TabIndex = 31;
			this.m_recent7.MouseUp += new System.Windows.Forms.MouseEventHandler(this.OnRecent);
			// 
			// m_recent6
			// 
			this.m_recent6.BackColor = System.Drawing.Color.Black;
			this.m_recent6.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
			this.m_recent6.Location = new System.Drawing.Point(304, 272);
			this.m_recent6.Name = "m_recent6";
			this.m_recent6.Size = new System.Drawing.Size(16, 16);
			this.m_recent6.TabIndex = 30;
			this.m_recent6.MouseUp += new System.Windows.Forms.MouseEventHandler(this.OnRecent);
			// 
			// m_recent5
			// 
			this.m_recent5.BackColor = System.Drawing.Color.Black;
			this.m_recent5.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
			this.m_recent5.Location = new System.Drawing.Point(280, 272);
			this.m_recent5.Name = "m_recent5";
			this.m_recent5.Size = new System.Drawing.Size(16, 16);
			this.m_recent5.TabIndex = 29;
			this.m_recent5.MouseUp += new System.Windows.Forms.MouseEventHandler(this.OnRecent);
			// 
			// m_recent4
			// 
			this.m_recent4.BackColor = System.Drawing.Color.Black;
			this.m_recent4.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
			this.m_recent4.Location = new System.Drawing.Point(352, 248);
			this.m_recent4.Name = "m_recent4";
			this.m_recent4.Size = new System.Drawing.Size(16, 16);
			this.m_recent4.TabIndex = 28;
			this.m_recent4.MouseUp += new System.Windows.Forms.MouseEventHandler(this.OnRecent);
			// 
			// label11
			// 
			this.label11.BackColor = System.Drawing.Color.White;
			this.label11.Location = new System.Drawing.Point(224, 144);
			this.label11.Name = "label11";
			this.label11.Size = new System.Drawing.Size(16, 16);
			this.label11.TabIndex = 32;
			// 
			// m_recent1
			// 
			this.m_recent1.BackColor = System.Drawing.Color.White;
			this.m_recent1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
			this.m_recent1.Location = new System.Drawing.Point(280, 248);
			this.m_recent1.Name = "m_recent1";
			this.m_recent1.Size = new System.Drawing.Size(16, 16);
			this.m_recent1.TabIndex = 25;
			this.m_recent1.MouseUp += new System.Windows.Forms.MouseEventHandler(this.OnRecent);
			// 
			// m_edit
			// 
			this.m_edit.BackColor = System.Drawing.SystemColors.Control;
			this.m_edit.Location = new System.Drawing.Point(8, 8);
			this.m_edit.Name = "m_edit";
			this.m_edit.Size = new System.Drawing.Size(256, 256);
			this.m_edit.TabIndex = 0;
			this.m_edit.TabStop = false;
			this.m_edit.MouseEnter += new System.EventHandler(this.OnEnterEditor);
			this.m_edit.MouseUp += new System.Windows.Forms.MouseEventHandler(this.OnMouseMove);
			this.m_edit.MouseMove += new System.Windows.Forms.MouseEventHandler(this.OnMouseMove);
			this.m_edit.MouseLeave += new System.EventHandler(this.OnLeaveEditor);
			this.m_edit.MouseDown += new System.Windows.Forms.MouseEventHandler(this.OnMouseMove);
			// 
			// m_modeList
			// 
			this.m_modeList.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
			this.m_modeList.Items.AddRange(new object[] {
						"Plot",
						"Line",
						"Rectangle",
						"Filled Rect",
						"Circle",
						"Filled Circle",
						"Ellipse",
						"Filled Ellipse",
						"Flood Fill",
						"Copy/Paste"});
			this.m_modeList.Location = new System.Drawing.Point(280, 64);
			this.m_modeList.MaxDropDownItems = 16;
			this.m_modeList.Name = "m_modeList";
			this.m_modeList.Size = new System.Drawing.Size(104, 21);
			this.m_modeList.TabIndex = 15;
			this.m_modeList.SelectedIndexChanged += new System.EventHandler(this.OnModeSelect);
			// 
			// m_fgPreview
			// 
			this.m_fgPreview.BackColor = System.Drawing.Color.White;
			this.m_fgPreview.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
			this.m_fgPreview.Location = new System.Drawing.Point(280, 112);
			this.m_fgPreview.Name = "m_fgPreview";
			this.m_fgPreview.Size = new System.Drawing.Size(40, 40);
			this.m_fgPreview.TabIndex = 17;
			this.m_fgPreview.Click += new System.EventHandler(this.OnForeground);
			// 
			// GfxEditor
			// 
			this.Controls.Add(this.m_recent8);
			this.Controls.Add(this.m_recent7);
			this.Controls.Add(this.m_recent6);
			this.Controls.Add(this.m_recent5);
			this.Controls.Add(this.m_recent4);
			this.Controls.Add(this.m_recent3);
			this.Controls.Add(this.m_recent2);
			this.Controls.Add(this.m_recent1);
			this.Controls.Add(this.label7);
			this.Controls.Add(this.m_pos);
			this.Controls.Add(this.label6);
			this.Controls.Add(this.label2);
			this.Controls.Add(this.m_sizeY);
			this.Controls.Add(this.m_sizeX);
			this.Controls.Add(this.m_bgPreview);
			this.Controls.Add(this.m_fgPreview);
			this.Controls.Add(this.m_undoButton);
			this.Controls.Add(this.m_modeList);
			this.Controls.Add(this.label5);
			this.Controls.Add(this.label4);
			this.Controls.Add(this.label3);
			this.Controls.Add(this.label1);
			this.Controls.Add(this.m_preview);
			this.Controls.Add(this.m_edit);
			this.Name = "GfxEditor";
			this.Size = new System.Drawing.Size(392, 304);
			((System.ComponentModel.ISupportInitialize)(this.m_sizeX)).EndInit();
			((System.ComponentModel.ISupportInitialize)(this.m_sizeY)).EndInit();
			this.ResumeLayout(false);
		}
		#endregion

		// -------------------------------------------------------
		// PUBLIC INTERFACES
		// -------------------------------------------------------
		#region Public Interfaces
		
		public Color GridColour
		{
			set {m_gridCol=value;}
		}
		
		public uint CharWidth
		{
			get {return m_width;}
		}

		public uint CharHeight
		{
			get {return m_height;}
		}

		public BitmapChar BitmapChar
		{
			get {return m_char;}
			set 
			{
				m_char=value;
				m_width=m_char.Width;
				m_height=m_char.Height;
				m_sizeX.Value=Convert.ToDecimal(m_char.Width);
				m_sizeY.Value=Convert.ToDecimal(m_char.Height);
				InitialiseOverlay();
				DrawGrid();
				DrawChar();
			}
		}
		
		public Color SelectedForeground
		{
			get {return m_fgPreview.BackColor;}
		}
		
		public Color SelectedBackground
		{
			get {return m_bgPreview.BackColor;}
		}
		
		#endregion
		
		// -------------------------------------------------------
		// MISC
		// -------------------------------------------------------
		#region Misc Routines
		
		private void AddRecentColour(Color c)
		{
			foreach (Label l in m_recent)
			{
				if (l.BackColor==c)
				{
					return;
				}
			}
			
			for(int f=m_recent.Length-1;f>0;f--)
			{
				m_recent[f].BackColor=m_recent[f-1].BackColor;
			}
			
			m_recent[0].BackColor=c;
		}
		
		#endregion
		
		// -------------------------------------------------------
		// SPRITE/GENERAL DRAWING
		// -------------------------------------------------------
		#region Sprite/General Drawing
		
		private void Flush(ref Graphics g)
		{
			g.Flush(FlushIntention.Flush);
			g.Dispose();
			g=null;
		}
		
		private void DrawGrid()
		{
			Graphics g=Graphics.FromImage(m_prevBmp);
			Pen p=new Pen(m_gridCol);

			g.Clear(Color.Black);
			Flush(ref g);
			
			g=Graphics.FromImage(m_editBmp);
			
			g.Clear(Color.Black);

			for(int x=0;x<m_width+1;x++)
			{
				g.DrawLine(p,x*m_grid,0,x*m_grid,m_my);
			}

			for(int y=0;y<m_height+1;y++)
			{
				g.DrawLine(p,0,y*m_grid,m_mx,y*m_grid);
			}
			
			Flush(ref g);

			m_edit.Invalidate();
			m_preview.Invalidate();
		}
		
		private void DrawChar()
		{
			if (m_char==null)
			{
				return;
			}
			
			Graphics editg=Graphics.FromImage(m_editBmp);
			Graphics prevg=Graphics.FromImage(m_prevBmp);

			for(uint x=0;x<m_char.Width;x++)
				for(uint y=0;y<m_char.Height;y++)
					if (m_overlay[x,y]==TRANS)
						CharPlot(editg,prevg,x,y,m_char[x,y]);
					else
						CharPlot(editg,prevg,x,y,m_overlay[x,y]);

			Flush(ref editg);
			Flush(ref prevg);

			m_edit.Invalidate();
			m_preview.Invalidate();
		}

		private void CharPlot(Graphics edit, Graphics prev,
		                        uint x, uint y, Color c)
		{
			SolidBrush p=new SolidBrush(c);
			
			edit.FillRectangle(p,x*m_grid+1,y*m_grid+1,m_grid-1,m_grid-1);
			prev.FillRectangle(p,1+x,1+y,1,1);
		}
		#endregion
				
		// -------------------------------------------------------
		// OVERLAY HANDLING
		// -------------------------------------------------------
		#region Overlay Handling
		
		private void InitialiseOverlay()
		{
			if (m_char==null)
			{
				m_overlay=null;
				return;
			}
			
			m_overlay=new Color[m_char.Width,m_char.Height];
			
			for(uint y=0;y<m_char.Height;y++)
				for(uint x=0;x<m_char.Width;x++)
					m_overlay[x,y]=TRANS;	
		}

		private void ClearOverlay()
		{
			if (m_overlay==null)
			{
				return;
			}
			
			for(uint y=0;y<m_char.Height;y++)
				for(uint x=0;x<m_char.Width;x++)
					m_overlay[x,y]=TRANS;	
		}
		
		private void ApplyOverlay()
		{
			for(uint y=0;y<m_char.Height;y++)
				for(uint x=0;x<m_char.Width;x++)
				{
					if (m_overlay[x,y]!=TRANS)
						m_char[x,y]=m_overlay[x,y];
					
					m_overlay[x,y]=TRANS;
				}
		}
		
		private void OverlayFromSprite()
		{
			for(uint y=0;y<m_char.Height;y++)
				for(uint x=0;x<m_char.Width;x++)
					m_overlay[x,y]=m_char[x,y];
		}

		#endregion
		
		// -------------------------------------------------------
		// COPY/PASTE ROUTINES
		// -------------------------------------------------------
		#region Copy/Paste

		private void DrawMarkBox(uint x1, uint y1,uint x2, uint y2)
		{
			RankCoord(ref x1, ref x2);
			RankCoord(ref y1, ref y2);
			
			for(uint x=x1;x<=x2;x++)
			{
				m_overlay[x,y1]=m_gridCol;
				m_overlay[x,y2]=m_gridCol;
			}

			for(uint y=y1;y<=y2;y++)
			{
				m_overlay[x1,y]=m_gridCol;
				m_overlay[x2,y]=m_gridCol;
			}
		}
		
		private void Copy(uint x1, uint y1, uint x2, uint y2)
		{
			RankCoord(ref x1, ref x2);
			RankCoord(ref y1, ref y2);
			
			m_cpX=x1;
			m_cpY=y1;
			m_cpWidth=x2-x1+1;
			m_cpHeight=y2-y1+1;
			
			m_cpBuff=new Color[m_cpWidth,m_cpHeight];
			
			for(uint x=0;x<m_cpWidth;x++)
				for(uint y=0;y<m_cpHeight;y++)
					m_cpBuff[x,y]=m_char[x1+x,y1+y];
			
			m_drawing=false;
			m_cpMenu.Mode=CopyMenu.EMode.eNothing;
		}
		
		private void Paste(int x, int y, bool trans)
		{
			switch (m_cpMenu.Gravity)
			{
				case CopyMenu.EGravity.eTopLeft:
					break;
					
				case CopyMenu.EGravity.eTopRight:
					x-=(int)m_cpWidth;
					break;

				case CopyMenu.EGravity.eBottomLeft:
					y-=(int)m_cpHeight;
					break;

				case CopyMenu.EGravity.eBottomRight:
					x-=(int)m_cpWidth;
					y-=(int)m_cpHeight;
					break;

				case CopyMenu.EGravity.eCentre:
					x-=(int)m_cpWidth/2;
					y-=(int)m_cpHeight/2;
					break;
			}
			
			for(int w=0;w<m_cpWidth;w++)
				for(int h=0;h<m_cpHeight;h++)
					if (!trans || m_cpBuff[w,h]!=m_bgPreview.BackColor)
						SafePlot(x+w,y+h,m_cpBuff[w,h]);
		}
		
		#endregion
		
		// -------------------------------------------------------
		// DRAWING ROUTINES
		// -------------------------------------------------------
		#region Drawing Routines
		
		private void RankCoord(ref uint c1, ref uint c2)
		{
			if (c1>c2)
			{
				uint t=c2;
				c2=c1;
				c1=t;
			}
		}
		
		private void SafePlot(int x, int y, Color col)
		{
			if (x>=0 && x<m_char.Width && y>=0 && y<m_char.Height)
				m_overlay[x,y]=col;
		}
		
		private void DrawLine(uint ux1, uint uy1,
		                      uint ux2, uint uy2,
		                      Color col)
		{
			int x1=(int)ux1;;
			int y1=(int)uy1;
			int x2=(int)ux2;
			int y2=(int)uy2;
		
		    int dx=x2-x1;
		    int dy=y2-y1;
		
		    int ix=Math.Sign(dx);
		    int iy=Math.Sign(dy);
		
		    dx=Math.Abs(dx);
		    dy=Math.Abs(dy);
		
		    int incrE;
			int incrNE;
			int d;
			bool ymode;
		
		    if (dy>dx)
			{
				ymode=true;
				d=dx*2-dy;
				incrE=dx*2;
				incrNE=(dx-dy)*2;
			}
		    else
			{
				ymode=false;
				d=dy*2-dx;
				incrE=dy*2;
				incrNE=(dy-dx)*2;
			}
		
		    int x=x1;
		    int y=y1;
		
			SafePlot(x,y,col);
		
		    if (ymode)
		    {
				while(y!=y2)
				{
					if (d<=0)
					{
						d+=incrE;
						y+=iy;
					}
					else
					{
						d+=incrNE;
						y+=iy;
						x+=ix;
					}
		
					SafePlot(x,y,col);
				}
		    }
		    else
		    {
				while(x!=x2)
				{
					if (d<=0)
					{
						d+=incrE;
						x+=ix;
					}
					else
					{
						d+=incrNE;
						y+=iy;
						x+=ix;
					}
		
					SafePlot(x,y,col);
				}
		    }
		}
		
		private void DrawRect(uint x1, uint y1,
		                      uint x2, uint y2,
		                      Color col, bool fill)
		{
			RankCoord(ref x1, ref x2);
			RankCoord(ref y1, ref y2);
			
			if (fill)
			{
				for(uint x=x1;x<=x2;x++)
					for(uint y=y1;y<=y2;y++)
						m_overlay[x,y]=col;
			}
			else
			{
				for(uint x=x1;x<=x2;x++)
				{
					m_overlay[x,y1]=col;
					m_overlay[x,y2]=col;
				}

				for(uint y=y1;y<=y2;y++)
				{
					m_overlay[x1,y]=col;
					m_overlay[x2,y]=col;
				}
			}
		}
		
		private void DrawEllipse(uint originx, uint originy,
		                         uint radpointx, uint radpointy,
		                         Color col, bool circle, bool fill)
		{
			int ox=(int)originx;
			int oy=(int)originy;
			double rx=Math.Abs(ox-(int)radpointx)+1;
			double ry=Math.Abs(oy-(int)radpointy)+1;
			
			if (circle)
			{
				rx=Math.Max(rx,ry);
				ry=rx;
			}
			
			for(double a=0;a<=Math.PI;a+=Math.PI/180)
			{
				int x=(int)(Math.Sin(a)*rx);
				int y=(int)(Math.Cos(a)*ry);
				
				if (fill)
				{
					for(int f=-x;f<=x;f++)
						SafePlot(ox+f,oy+y,col);
				}
				else
				{
					SafePlot(ox+x,oy+y,col);
					SafePlot(ox-x,oy+y,col);
				}
			}
		}
		
		private void FloodFill(uint x, uint y, Color col, Color bg)
		{
			if (m_overlay[x,y]==col || m_overlay[x,y]!=bg)
			{
				return;
			}
			
			m_overlay[x,y]=col;
			
			if (x>0)
				FloodFill(x-1,y,col,bg);
			
			if (y>0)
				FloodFill(x,y-1,col,bg);
			
			if (x<m_char.Width-1)
				FloodFill(x+1,y,col,bg);
			
			if (y<m_char.Height-1)
				FloodFill(x,y+1,col,bg);
		}

		#endregion
		
		// -------------------------------------------------------
		// CALLBACKS
		// -------------------------------------------------------
		#region Callbacks
		
		void OnDrawMode(object sender, System.EventArgs e)
		{
			m_mode=(Mode)m_modeList.SelectedIndex;
		}
		
		void OnSizeWidth(object sender, System.EventArgs e)
		{
			m_width=Convert.ToUInt32(m_sizeX.Value);
			
			if (m_char!=null)
			{
				m_undo=new BitmapChar(m_char);
				m_char.Resize(m_width,m_height);
				InitialiseOverlay();
			}
			
			m_grid=Math.Min(SIZE/m_width,SIZE/m_height);
			
			m_mx=m_width*m_grid;
			m_my=m_height*m_grid;
			
			DrawGrid();
			DrawChar();
		}
		
		void OnSizeHeight(object sender, System.EventArgs e)
		{
			m_height=Convert.ToUInt32(m_sizeY.Value);
			
			if (m_char!=null)
			{
				m_undo=new BitmapChar(m_char);
				m_char.Resize(m_width,m_height);
				InitialiseOverlay();
			}
			
			m_grid=Math.Min(SIZE/m_width,SIZE/m_height);
			
			m_mx=m_width*m_grid;
			m_my=m_height*m_grid;
			
			DrawGrid();
			DrawChar();
		}
		
		void OnEnterEditor(object sender, System.EventArgs e)
		{
			//m_inEditor=true;
		}
		
		void OnLeaveEditor(object sender, System.EventArgs e)
		{
			//m_inEditor=false;
			
			m_pos.Text="";

			if (m_drawing && m_mode==Mode.ePlot)
			{
				m_undo=new BitmapChar(m_char);
				ApplyOverlay();
			}

			m_drawing=false;

			ClearOverlay();
			DrawChar();
		}

		void OnModeSelect(object sender, System.EventArgs e)
		{
			m_mode=(Mode)m_modeList.SelectedIndex;
		}
		
		void OnUndo(object sender, System.EventArgs e)
		{
			if (m_undo!=null)
			{
				BitmapChar s=m_char;
				BitmapChar=m_undo;
				m_undo=s;
			}
		}
		
		void OnMouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
		{
			if (m_char==null || e.X<0 || e.X>=m_mx || e.Y<0 || e.Y>=m_my)
			{
				return;
			}
			
			uint x;
			uint y;
			
			x=(uint)e.X/m_grid;
			y=(uint)e.Y/m_grid;
			
			m_pos.Text=x+","+y;
			
			if (x>=m_char.Width || y>=m_char.Height)
			{
				return;
			}

			if (e.Button==MouseButtons.None)
			{
				switch(m_mode)
				{
					case Mode.eFloodFill:
						if (m_drawing)
						{
							OverlayFromSprite();
							FloodFill(m_ox,m_oy,m_pen,m_char[m_ox,m_oy]);
							m_drawing=false;
							m_undo=new BitmapChar(m_char);
							ApplyOverlay();
							DrawChar();
						}
						break;
						
					case Mode.eCopyPaste:
						switch(m_cpMenu.Mode)
						{
							case CopyMenu.EMode.eMark:
								if (m_drawing)
								{
									ClearOverlay();
									Copy(m_ox,m_oy,x,y);
									DrawChar();
									m_drawing=false;
								}
								break;
								
							case CopyMenu.EMode.ePaste:
								ClearOverlay();
								Paste((int)x,(int)y,false);
								DrawChar();
								break;
								
							case CopyMenu.EMode.ePasteTransparent:
								ClearOverlay();
								Paste((int)x,(int)y,true);
								DrawChar();
								break;
								
							default:
								break;
						}
						break;
						
					default:
						if (m_drawing)
						{
							m_drawing=false;
							m_undo=new BitmapChar(m_char);
							ApplyOverlay();
							DrawChar();
						}
						break;
				}
				
				return;
			}
			
			if (!m_drawing)
			{
				m_ox=x;
				m_oy=y;
				m_drawing=true;

				if (e.Button==MouseButtons.Left)
				{
					m_pen=m_fgPreview.BackColor;
				}
				else
				{
					m_pen=m_bgPreview.BackColor;
				}
			}

			switch(m_mode)
			{
				case Mode.ePlot:
					m_overlay[x,y]=m_pen;
					DrawChar();
					break;
					
				case Mode.eLine:
					ClearOverlay();
					DrawLine(m_ox,m_oy,x,y,m_pen);
					DrawChar();
					break;
					
				case Mode.eRectangle:
					ClearOverlay();
					DrawRect(m_ox,m_oy,x,y,m_pen,false);
					DrawChar();
					break;
					
				case Mode.eFilledRectangle:
					ClearOverlay();
					DrawRect(m_ox,m_oy,x,y,m_pen,true);
					DrawChar();
					break;

				case Mode.eCircle:
					ClearOverlay();
					DrawEllipse(m_ox,m_oy,x,y,m_pen,true,false);
					DrawChar();
					break;
					
				case Mode.eFilledCircle:
					ClearOverlay();
					DrawEllipse(m_ox,m_oy,x,y,m_pen,true,true);
					DrawChar();
					break;
					
				case Mode.eEllipse:
					ClearOverlay();
					DrawEllipse(m_ox,m_oy,x,y,m_pen,false,false);
					DrawChar();
					break;
					
				case Mode.eFilledEllipse:
					ClearOverlay();
					DrawEllipse(m_ox,m_oy,x,y,m_pen,false,true);
					DrawChar();
					break;
					
				case Mode.eFloodFill:
					break;

				case Mode.eCopyPaste:
					if (e.Button==MouseButtons.Right)
					{
						m_cpMenu.AllowPaste=(m_cpBuff!=null);
						m_cpMenu.Show(m_edit,e.X,e.Y);
					}
					else
					{
						switch(m_cpMenu.Mode)
						{
							case CopyMenu.EMode.eMark:
								ClearOverlay();
								DrawMarkBox(m_ox,m_oy,x,y);
								DrawChar();
								break;
								
							case CopyMenu.EMode.ePaste:
							case CopyMenu.EMode.ePasteTransparent:
								m_undo=new BitmapChar(m_char);
								ApplyOverlay();
								DrawChar();
								m_drawing=false;
								m_cpMenu.Mode=CopyMenu.EMode.eNothing;
								break;
								
							default:
								break;
						}
					}
					break;
			}
		}
		
		void OnForeground(object sender, System.EventArgs e)
		{
			ColorDialog d=new ColorDialog();
			
			d.Color=m_fgPreview.BackColor;
			d.FullOpen=true;
			
			if (d.ShowDialog()==DialogResult.OK)
			{
				m_fgPreview.BackColor=d.Color;
				AddRecentColour(d.Color);
			}
		}
		
		void OnBackground(object sender, System.EventArgs e)
		{
			ColorDialog d=new ColorDialog();
			
			d.Color=m_bgPreview.BackColor;
			d.FullOpen=true;
			
			if (d.ShowDialog()==DialogResult.OK)
			{
				m_bgPreview.BackColor=d.Color;
				AddRecentColour(d.Color);
			}
		}
		
		void OnRecent(object sender, System.Windows.Forms.MouseEventArgs e)
		{
			Label l=(Label)sender;
			
			if (e.Button==MouseButtons.Left)
			{
				m_fgPreview.BackColor=l.BackColor;
			}
			else if (e.Button==MouseButtons.Right)
			{
				m_bgPreview.BackColor=l.BackColor;
			}
		}
		
		#endregion
	}
}