// BitmapSpriteEd - Bitmap Sprite Editor
// 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.Drawing;
using System.Drawing.Imaging;
using System.Windows.Forms;
using System.IO;

namespace BitmapSpriteEd
{
	/// <summary>
	/// Description of MainForm.
	/// </summary>
	public class MainForm : System.Windows.Forms.Form
	{
		private System.ComponentModel.IContainer components;
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.MenuItem m_helpMenu;
		private System.Windows.Forms.Button m_removeFrame;
		private System.Windows.Forms.Button m_addFrame;
		private System.Windows.Forms.MenuItem m_break1;
		private System.Windows.Forms.MenuItem m_fileMenu;
		private System.Windows.Forms.Button m_addSprite;
		private System.Windows.Forms.MenuItem m_exportSinglePNG;
		private System.Windows.Forms.Label m_spriteCount;
		private System.Windows.Forms.Button m_removeSprite;
		private System.Windows.Forms.TextBox m_spriteName;
		private System.Windows.Forms.MenuItem m_exportMenu;
		private System.Windows.Forms.CheckBox m_addFrameAsCopy;
		private System.Windows.Forms.MenuItem m_about;
		private System.Windows.Forms.Label label3;
		private System.Windows.Forms.Label label2;
		private System.Windows.Forms.CheckBox m_animStretch;
		private System.Windows.Forms.Label label4;
		private System.Windows.Forms.Timer m_timer;
		private System.Windows.Forms.MainMenu m_menu;
		private System.Windows.Forms.GroupBox m_animGroup;
		private System.Windows.Forms.CheckBox m_animEnable;
		private System.Windows.Forms.NumericUpDown m_animSpeed;
		private System.Windows.Forms.MenuItem m_quit;
		private System.Windows.Forms.MenuItem m_save;
		private System.Windows.Forms.MenuItem m_exportPNG;
		private System.Windows.Forms.MenuItem m_saveAs;
		private System.Windows.Forms.CheckBox m_animPong;
		private System.Windows.Forms.NumericUpDown m_spriteNum;
		private System.Windows.Forms.GroupBox m_editGroup;
		private System.Windows.Forms.MenuItem m_new;
		private System.Windows.Forms.MenuItem m_open;
		private System.Windows.Forms.PictureBox m_preview;
		private System.Windows.Forms.Label m_frameCount;
		private System.Windows.Forms.GroupBox m_spriteGroup;
		private System.Windows.Forms.NumericUpDown m_frameNum;

		private GfxEditor			m_edit;
		private SpriteList			m_sprites;
		private string				m_path;
		private string				m_exportPath;
		private int					m_animIndex;
		private int					m_animIndexInc=1;
		
		public MainForm()
		{
			//
			// The InitializeComponent() call is required for Windows Forms designer support.
			//
			InitializeComponent();
			
			m_path="";
			m_exportPath="";
			m_sprites=new SpriteList();
			
			m_edit=new GfxEditor();
			m_edit.Location=new Point(4,16);
			m_editGroup.Controls.Add(m_edit);
			
			m_edit.FrameResize+=new GfxEditor.FrameResizeEventHandler(OnFrameResize);
			
			OnNew(null,null);
		}
		
		[STAThread]
		public static void Main(string[] args)
		{
			Application.Run(new MainForm());
		}
		
		#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.components = new System.ComponentModel.Container();
			this.m_frameNum = new System.Windows.Forms.NumericUpDown();
			this.m_spriteGroup = new System.Windows.Forms.GroupBox();
			this.m_frameCount = new System.Windows.Forms.Label();
			this.m_preview = new System.Windows.Forms.PictureBox();
			this.m_open = new System.Windows.Forms.MenuItem();
			this.m_new = new System.Windows.Forms.MenuItem();
			this.m_editGroup = new System.Windows.Forms.GroupBox();
			this.m_spriteNum = new System.Windows.Forms.NumericUpDown();
			this.m_animPong = new System.Windows.Forms.CheckBox();
			this.m_saveAs = new System.Windows.Forms.MenuItem();
			this.m_exportPNG = new System.Windows.Forms.MenuItem();
			this.m_save = new System.Windows.Forms.MenuItem();
			this.m_quit = new System.Windows.Forms.MenuItem();
			this.m_animSpeed = new System.Windows.Forms.NumericUpDown();
			this.m_animEnable = new System.Windows.Forms.CheckBox();
			this.m_animGroup = new System.Windows.Forms.GroupBox();
			this.m_menu = new System.Windows.Forms.MainMenu();
			this.m_timer = new System.Windows.Forms.Timer(this.components);
			this.label4 = new System.Windows.Forms.Label();
			this.m_animStretch = new System.Windows.Forms.CheckBox();
			this.label2 = new System.Windows.Forms.Label();
			this.label3 = new System.Windows.Forms.Label();
			this.m_about = new System.Windows.Forms.MenuItem();
			this.m_addFrameAsCopy = new System.Windows.Forms.CheckBox();
			this.m_exportMenu = new System.Windows.Forms.MenuItem();
			this.m_spriteName = new System.Windows.Forms.TextBox();
			this.m_removeSprite = new System.Windows.Forms.Button();
			this.m_spriteCount = new System.Windows.Forms.Label();
			this.m_exportSinglePNG = new System.Windows.Forms.MenuItem();
			this.m_addSprite = new System.Windows.Forms.Button();
			this.m_fileMenu = new System.Windows.Forms.MenuItem();
			this.m_break1 = new System.Windows.Forms.MenuItem();
			this.m_addFrame = new System.Windows.Forms.Button();
			this.m_removeFrame = new System.Windows.Forms.Button();
			this.m_helpMenu = new System.Windows.Forms.MenuItem();
			this.label1 = new System.Windows.Forms.Label();
			((System.ComponentModel.ISupportInitialize)(this.m_frameNum)).BeginInit();
			this.m_spriteGroup.SuspendLayout();
			((System.ComponentModel.ISupportInitialize)(this.m_spriteNum)).BeginInit();
			((System.ComponentModel.ISupportInitialize)(this.m_animSpeed)).BeginInit();
			this.m_animGroup.SuspendLayout();
			this.SuspendLayout();
			// 
			// m_frameNum
			// 
			this.m_frameNum.Location = new System.Drawing.Point(64, 96);
			this.m_frameNum.Minimum = new System.Decimal(new int[] {
						1,
						0,
						0,
						0});
			this.m_frameNum.Name = "m_frameNum";
			this.m_frameNum.ReadOnly = true;
			this.m_frameNum.Size = new System.Drawing.Size(64, 20);
			this.m_frameNum.TabIndex = 2;
			this.m_frameNum.TextAlign = System.Windows.Forms.HorizontalAlignment.Right;
			this.m_frameNum.Value = new System.Decimal(new int[] {
						1,
						0,
						0,
						0});
			this.m_frameNum.ValueChanged += new System.EventHandler(this.OnFrameSelected);
			// 
			// m_spriteGroup
			// 
			this.m_spriteGroup.Controls.Add(this.m_addFrameAsCopy);
			this.m_spriteGroup.Controls.Add(this.m_frameCount);
			this.m_spriteGroup.Controls.Add(this.m_spriteCount);
			this.m_spriteGroup.Controls.Add(this.m_spriteName);
			this.m_spriteGroup.Controls.Add(this.label3);
			this.m_spriteGroup.Controls.Add(this.m_removeFrame);
			this.m_spriteGroup.Controls.Add(this.m_addFrame);
			this.m_spriteGroup.Controls.Add(this.m_removeSprite);
			this.m_spriteGroup.Controls.Add(this.m_addSprite);
			this.m_spriteGroup.Controls.Add(this.label2);
			this.m_spriteGroup.Controls.Add(this.m_frameNum);
			this.m_spriteGroup.Controls.Add(this.label1);
			this.m_spriteGroup.Controls.Add(this.m_spriteNum);
			this.m_spriteGroup.Location = new System.Drawing.Point(424, 8);
			this.m_spriteGroup.Name = "m_spriteGroup";
			this.m_spriteGroup.Size = new System.Drawing.Size(288, 192);
			this.m_spriteGroup.TabIndex = 1;
			this.m_spriteGroup.TabStop = false;
			this.m_spriteGroup.Text = "Sprite Frames";
			// 
			// m_frameCount
			// 
			this.m_frameCount.Location = new System.Drawing.Point(136, 104);
			this.m_frameCount.Name = "m_frameCount";
			this.m_frameCount.Size = new System.Drawing.Size(56, 16);
			this.m_frameCount.TabIndex = 11;
			this.m_frameCount.Text = "label5";
			// 
			// m_preview
			// 
			this.m_preview.BackColor = System.Drawing.Color.Black;
			this.m_preview.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
			this.m_preview.Location = new System.Drawing.Point(176, 24);
			this.m_preview.Name = "m_preview";
			this.m_preview.Size = new System.Drawing.Size(64, 64);
			this.m_preview.SizeMode = System.Windows.Forms.PictureBoxSizeMode.CenterImage;
			this.m_preview.TabIndex = 3;
			this.m_preview.TabStop = false;
			// 
			// m_open
			// 
			this.m_open.Index = 1;
			this.m_open.Shortcut = System.Windows.Forms.Shortcut.CtrlO;
			this.m_open.Text = "Open";
			this.m_open.Click += new System.EventHandler(this.OnOpen);
			// 
			// m_new
			// 
			this.m_new.Index = 0;
			this.m_new.Shortcut = System.Windows.Forms.Shortcut.CtrlN;
			this.m_new.Text = "New";
			this.m_new.Click += new System.EventHandler(this.OnNew);
			// 
			// m_editGroup
			// 
			this.m_editGroup.Location = new System.Drawing.Point(8, 8);
			this.m_editGroup.Name = "m_editGroup";
			this.m_editGroup.Size = new System.Drawing.Size(408, 328);
			this.m_editGroup.TabIndex = 0;
			this.m_editGroup.TabStop = false;
			this.m_editGroup.Text = "Editor";
			// 
			// m_spriteNum
			// 
			this.m_spriteNum.Location = new System.Drawing.Point(64, 32);
			this.m_spriteNum.Minimum = new System.Decimal(new int[] {
						1,
						0,
						0,
						0});
			this.m_spriteNum.Name = "m_spriteNum";
			this.m_spriteNum.ReadOnly = true;
			this.m_spriteNum.Size = new System.Drawing.Size(64, 20);
			this.m_spriteNum.TabIndex = 0;
			this.m_spriteNum.TextAlign = System.Windows.Forms.HorizontalAlignment.Right;
			this.m_spriteNum.Value = new System.Decimal(new int[] {
						1,
						0,
						0,
						0});
			this.m_spriteNum.ValueChanged += new System.EventHandler(this.OnSpriteSelected);
			// 
			// m_animPong
			// 
			this.m_animPong.Location = new System.Drawing.Point(8, 48);
			this.m_animPong.Name = "m_animPong";
			this.m_animPong.Size = new System.Drawing.Size(120, 16);
			this.m_animPong.TabIndex = 4;
			this.m_animPong.Text = "Ping/Pong";
			this.m_animPong.CheckedChanged += new System.EventHandler(this.OnAnimPingPong);
			// 
			// m_saveAs
			// 
			this.m_saveAs.Index = 3;
			this.m_saveAs.Shortcut = System.Windows.Forms.Shortcut.F12;
			this.m_saveAs.Text = "Save as...";
			this.m_saveAs.Click += new System.EventHandler(this.OnSaveAs);
			// 
			// m_exportPNG
			// 
			this.m_exportPNG.Index = 0;
			this.m_exportPNG.Text = "Export to PNG";
			this.m_exportPNG.Click += new System.EventHandler(this.OnExportPNG);
			// 
			// m_save
			// 
			this.m_save.Enabled = false;
			this.m_save.Index = 2;
			this.m_save.Shortcut = System.Windows.Forms.Shortcut.CtrlS;
			this.m_save.Text = "Save";
			this.m_save.Click += new System.EventHandler(this.OnSave);
			// 
			// m_quit
			// 
			this.m_quit.Index = 5;
			this.m_quit.Shortcut = System.Windows.Forms.Shortcut.CtrlQ;
			this.m_quit.Text = "Quit";
			this.m_quit.Click += new System.EventHandler(this.OnQuit);
			// 
			// m_animSpeed
			// 
			this.m_animSpeed.Location = new System.Drawing.Point(8, 96);
			this.m_animSpeed.Maximum = new System.Decimal(new int[] {
						50,
						0,
						0,
						0});
			this.m_animSpeed.Minimum = new System.Decimal(new int[] {
						1,
						0,
						0,
						0});
			this.m_animSpeed.Name = "m_animSpeed";
			this.m_animSpeed.ReadOnly = true;
			this.m_animSpeed.Size = new System.Drawing.Size(48, 20);
			this.m_animSpeed.TabIndex = 1;
			this.m_animSpeed.Value = new System.Decimal(new int[] {
						5,
						0,
						0,
						0});
			this.m_animSpeed.ValueChanged += new System.EventHandler(this.OnAnimSpeed);
			// 
			// m_animEnable
			// 
			this.m_animEnable.Location = new System.Drawing.Point(8, 24);
			this.m_animEnable.Name = "m_animEnable";
			this.m_animEnable.Size = new System.Drawing.Size(120, 16);
			this.m_animEnable.TabIndex = 0;
			this.m_animEnable.Text = "Preview Animation";
			this.m_animEnable.CheckedChanged += new System.EventHandler(this.OnAnimEnable);
			// 
			// m_animGroup
			// 
			this.m_animGroup.Controls.Add(this.m_animStretch);
			this.m_animGroup.Controls.Add(this.m_animPong);
			this.m_animGroup.Controls.Add(this.m_preview);
			this.m_animGroup.Controls.Add(this.label4);
			this.m_animGroup.Controls.Add(this.m_animSpeed);
			this.m_animGroup.Controls.Add(this.m_animEnable);
			this.m_animGroup.Location = new System.Drawing.Point(424, 208);
			this.m_animGroup.Name = "m_animGroup";
			this.m_animGroup.Size = new System.Drawing.Size(288, 128);
			this.m_animGroup.TabIndex = 2;
			this.m_animGroup.TabStop = false;
			this.m_animGroup.Text = "Animation Preview";
			// 
			// m_menu
			// 
			this.m_menu.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
						this.m_fileMenu,
						this.m_exportMenu,
						this.m_helpMenu});
			// 
			// m_timer
			// 
			this.m_timer.Tick += new System.EventHandler(this.OnTimer);
			// 
			// label4
			// 
			this.label4.Location = new System.Drawing.Point(64, 104);
			this.label4.Name = "label4";
			this.label4.Size = new System.Drawing.Size(104, 16);
			this.label4.TabIndex = 2;
			this.label4.Text = "/50 secs per frame";
			// 
			// m_animStretch
			// 
			this.m_animStretch.Location = new System.Drawing.Point(8, 72);
			this.m_animStretch.Name = "m_animStretch";
			this.m_animStretch.Size = new System.Drawing.Size(120, 16);
			this.m_animStretch.TabIndex = 5;
			this.m_animStretch.Text = "Stretch";
			this.m_animStretch.CheckedChanged += new System.EventHandler(this.OnAnimStretch);
			// 
			// label2
			// 
			this.label2.Location = new System.Drawing.Point(8, 96);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(56, 24);
			this.label2.TabIndex = 3;
			this.label2.Text = "Frame:";
			this.label2.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
			// 
			// label3
			// 
			this.label3.Location = new System.Drawing.Point(8, 160);
			this.label3.Name = "label3";
			this.label3.Size = new System.Drawing.Size(56, 24);
			this.label3.TabIndex = 8;
			this.label3.Text = "Name:";
			this.label3.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
			// 
			// m_about
			// 
			this.m_about.Index = 0;
			this.m_about.Text = "About";
			this.m_about.Click += new System.EventHandler(this.OnAbout);
			// 
			// m_addFrameAsCopy
			// 
			this.m_addFrameAsCopy.Location = new System.Drawing.Point(64, 128);
			this.m_addFrameAsCopy.Name = "m_addFrameAsCopy";
			this.m_addFrameAsCopy.Size = new System.Drawing.Size(128, 16);
			this.m_addFrameAsCopy.TabIndex = 12;
			this.m_addFrameAsCopy.Text = "New Frame as Copy";
			// 
			// m_exportMenu
			// 
			this.m_exportMenu.Index = 1;
			this.m_exportMenu.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
						this.m_exportPNG,
						this.m_exportSinglePNG});
			this.m_exportMenu.Text = "Export";
			// 
			// m_spriteName
			// 
			this.m_spriteName.CharacterCasing = System.Windows.Forms.CharacterCasing.Upper;
			this.m_spriteName.Location = new System.Drawing.Point(64, 160);
			this.m_spriteName.Name = "m_spriteName";
			this.m_spriteName.Size = new System.Drawing.Size(208, 20);
			this.m_spriteName.TabIndex = 9;
			this.m_spriteName.Text = "";
			this.m_spriteName.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.OnSpriteNameKey);
			this.m_spriteName.TextChanged += new System.EventHandler(this.OnSpriteName);
			// 
			// m_removeSprite
			// 
			this.m_removeSprite.Location = new System.Drawing.Point(200, 48);
			this.m_removeSprite.Name = "m_removeSprite";
			this.m_removeSprite.Size = new System.Drawing.Size(72, 24);
			this.m_removeSprite.TabIndex = 5;
			this.m_removeSprite.Text = "Remove";
			this.m_removeSprite.Click += new System.EventHandler(this.OnRemoveSprite);
			// 
			// m_spriteCount
			// 
			this.m_spriteCount.Location = new System.Drawing.Point(136, 40);
			this.m_spriteCount.Name = "m_spriteCount";
			this.m_spriteCount.Size = new System.Drawing.Size(56, 16);
			this.m_spriteCount.TabIndex = 10;
			this.m_spriteCount.Text = "label5";
			// 
			// m_exportSinglePNG
			// 
			this.m_exportSinglePNG.Index = 1;
			this.m_exportSinglePNG.Text = "Export to Single PNG";
			this.m_exportSinglePNG.Click += new System.EventHandler(this.OnExportSinglePNG);
			// 
			// m_addSprite
			// 
			this.m_addSprite.Location = new System.Drawing.Point(200, 16);
			this.m_addSprite.Name = "m_addSprite";
			this.m_addSprite.Size = new System.Drawing.Size(72, 24);
			this.m_addSprite.TabIndex = 4;
			this.m_addSprite.Text = "Add";
			this.m_addSprite.Click += new System.EventHandler(this.OnAddSprite);
			// 
			// m_fileMenu
			// 
			this.m_fileMenu.Index = 0;
			this.m_fileMenu.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
						this.m_new,
						this.m_open,
						this.m_save,
						this.m_saveAs,
						this.m_break1,
						this.m_quit});
			this.m_fileMenu.Text = "File";
			// 
			// m_break1
			// 
			this.m_break1.Index = 4;
			this.m_break1.Text = "-";
			// 
			// m_addFrame
			// 
			this.m_addFrame.Location = new System.Drawing.Point(200, 80);
			this.m_addFrame.Name = "m_addFrame";
			this.m_addFrame.Size = new System.Drawing.Size(72, 24);
			this.m_addFrame.TabIndex = 6;
			this.m_addFrame.Text = "Add";
			this.m_addFrame.Click += new System.EventHandler(this.OnAddFrame);
			// 
			// m_removeFrame
			// 
			this.m_removeFrame.Location = new System.Drawing.Point(200, 112);
			this.m_removeFrame.Name = "m_removeFrame";
			this.m_removeFrame.Size = new System.Drawing.Size(72, 24);
			this.m_removeFrame.TabIndex = 7;
			this.m_removeFrame.Text = "Remove";
			this.m_removeFrame.Click += new System.EventHandler(this.OnRemoveFrame);
			// 
			// m_helpMenu
			// 
			this.m_helpMenu.Index = 2;
			this.m_helpMenu.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
						this.m_about});
			this.m_helpMenu.Text = "Help";
			// 
			// label1
			// 
			this.label1.Location = new System.Drawing.Point(8, 32);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(56, 24);
			this.label1.TabIndex = 1;
			this.label1.Text = "Sprite:";
			this.label1.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
			// 
			// MainForm
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.ClientSize = new System.Drawing.Size(722, 351);
			this.Controls.Add(this.m_animGroup);
			this.Controls.Add(this.m_spriteGroup);
			this.Controls.Add(this.m_editGroup);
			this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
			this.MaximizeBox = false;
			this.Menu = this.m_menu;
			this.Name = "MainForm";
			this.Text = "Bitmap Sprite Editor";
			this.Closing += new System.ComponentModel.CancelEventHandler(this.OnClosing);
			((System.ComponentModel.ISupportInitialize)(this.m_frameNum)).EndInit();
			this.m_spriteGroup.ResumeLayout(false);
			((System.ComponentModel.ISupportInitialize)(this.m_spriteNum)).EndInit();
			((System.ComponentModel.ISupportInitialize)(this.m_animSpeed)).EndInit();
			this.m_animGroup.ResumeLayout(false);
			this.ResumeLayout(false);
		}
		#endregion

		private Sprite SelectedSprite
		{
			get
			{
				int spr=Convert.ToInt32(m_spriteNum.Value)-1;
				
				return m_sprites[spr];
			}
		}
		
		private Frame SelectedFrame
		{
			get
			{
				int frame=Convert.ToInt32(m_frameNum.Value)-1;
				
				return SelectedSprite[frame];
			}
		}
		
		private bool EditChanged
		{
			get {return m_edit.Frame!=null && m_edit.Frame.Changed;}
		}
		
		private bool ChangesAllowed
		{
			get {return (!m_sprites.Changed && !EditChanged) || Util.YesNo("Abandon changes?");}
		}

		private void UpdateInfo()
		{
			m_spriteCount.Text="of "+m_sprites.Count;
			m_frameCount.Text="of "+SelectedSprite.Count;
			m_removeSprite.Enabled=(m_sprites.Count>1);
			m_removeFrame.Enabled=(SelectedSprite.Count>1);
		}
		
		private void OnFrameResize(object sender, GfxEditor.FrameResizeEventArgs e)
		{
			foreach (Frame f in SelectedSprite)
			{
				if (f!=m_edit.Frame)
				{
					f.Resize(e.Width,e.Height);
				}
			}
		}
		
		void OnNew(object sender, System.EventArgs e)
		{
			if (ChangesAllowed)
			{
				m_sprites=new SpriteList();
				m_sprites.Add(new Sprite());
				m_sprites.Changed=false;
				m_save.Enabled=false;
				
				m_animIndex=0;
				m_animIndexInc=1;
				
				m_spriteNum.Maximum=1;
				m_frameNum.Maximum=1;
				m_spriteNum.Value=1;
				OnSpriteSelected(null,null);
			}
		}
		
		void OnOpen(object sender, System.EventArgs e)
		{
			if (ChangesAllowed)
			{
				OpenFileDialog fsel=new OpenFileDialog();
				
				fsel.FileName=m_path;
				fsel.Filter="Bitmap Sprite Files (*.bms)|*.bms|All files (*.*)|*.*";
				
				if (fsel.ShowDialog()==DialogResult.OK)
				{
					using(FileStream str=File.Open(fsel.FileName,FileMode.Open))
					{
						try
						{
							m_sprites=SpriteList.Input(str);
							str.Close();
							m_spriteNum.Value=1;
							m_spriteNum.Maximum=m_sprites.Count;
							OnSpriteSelected(null,null);
							m_path=fsel.FileName;
							m_save.Enabled=true;
						}
						catch (Exception ex)
						{
							Util.Error("Error opening " + fsel.FileName + ":\n" + ex.Message);
						}
					}
				}
			}
		}
		
		void OnSave(object sender, System.EventArgs e)
		{
			using(FileStream str=File.Open(m_path,FileMode.Create))
			{
				try
				{
					m_sprites.Output(str);
					str.Close();
				}
				catch (Exception ex)
				{
					Util.Error("Error writing " + m_path + ":\n" + ex.Message);
				}
			}
		}
		
		void OnSaveAs(object sender, System.EventArgs e)
		{
			SaveFileDialog fsel=new SaveFileDialog();
			
			fsel.FileName=m_path;
			fsel.Filter="Bitmap Sprite Files (*.bms)|*.bms|All files (*.*)|*.*";
			
			if (fsel.ShowDialog()==DialogResult.OK)
			{
				using(FileStream str=File.Open(fsel.FileName,FileMode.Create))
				{
					try
					{
						m_sprites.Output(str);
						str.Close();
						m_path=fsel.FileName;
						m_save.Enabled=true;
					}
					catch (Exception ex)
					{
						Util.Error("Error writing " + fsel.FileName + ":\n" + ex.Message);
					}
				}
			}
		}
		
		void OnQuit(object sender, System.EventArgs e)
		{
			Close();
		}
		
		void OnAbout(object sender, System.EventArgs e)
		{
			Util.About();
		}
		
		void OnExportPNG(object sender, System.EventArgs e)
		{
			try
			{
				m_sprites.Validate();
			}
			catch (ApplicationException ex)
			{
				Util.Error(ex.Message);
				return;
			}
			
			FolderBrowserDialog fsel=new FolderBrowserDialog();
			
			fsel.ShowNewFolderButton=true;
			fsel.Description="Select folder to ouput PNG files to";
			fsel.SelectedPath=m_exportPath;
			
			if (fsel.ShowDialog()==DialogResult.OK)
			{
				try
				{
					foreach(Sprite s in m_sprites)
					{
						using (Bitmap bmp=new Bitmap(s[0].Width*s.Count,s[0].Height,PixelFormat.Format32bppArgb))
						{
							using (Graphics g=Graphics.FromImage(bmp))
							{
								string fname=fsel.SelectedPath +
												Path.DirectorySeparatorChar +
													s.Name + ".png";

								int x=0;
								
								foreach (Frame f in s)
								{
									g.DrawImageUnscaled(f.Bitmap,x,0);
									x+=f.Width;
								}
								
							
								bmp.Save(fname,ImageFormat.Png);
							}
						}
					}
					
					m_exportPath=fsel.SelectedPath;
				}
				catch (Exception ex)
				{
					Util.Error("Error writing to " + fsel.SelectedPath + ":\n" + ex.Message);
				}
			}
		}

		void OnExportSinglePNG(object sender, System.EventArgs e)
		{
			SaveFileDialog fsel=new SaveFileDialog();
			
			fsel.Filter="PNG Files (*.png)|*.png|All files (*.*)|*.*";
			
			if (fsel.ShowDialog()==DialogResult.OK)
			{
				int height=0;
				int width=0;
				
				foreach (Sprite s in m_sprites)
				{
					height+=s[0].Height;
					width=Math.Max(width,s[0].Width*s.Count);
				}
				
				try
				{
					using (Bitmap bmp=new Bitmap(width,height,PixelFormat.Format32bppArgb))
					{
						using (Graphics g=Graphics.FromImage(bmp))
						{
							int y=0;
							
							foreach(Sprite s in m_sprites)
							{
								int x=0;
								
								foreach (Frame f in s)
								{
									g.DrawImageUnscaled(f.Bitmap,x,y);
									x+=f.Width;
								}
								
								y+=s[0].Height;
							}
							
							bmp.Save(fsel.FileName,ImageFormat.Png);
						}
					}
				}
				catch (Exception ex)
				{
					Util.Error("Error writing " + fsel.FileName + ":\n" + ex.Message);
				}
			}
		}
		
		void OnAddSprite(object sender, System.EventArgs e)
		{
			m_timer.Enabled=false;
			
			m_sprites.Add(new Sprite());
			m_spriteNum.Maximum=m_sprites.Count;
			UpdateInfo();

			m_animIndex=0;
			m_animIndexInc=1;
			m_timer.Enabled=m_animEnable.Checked;
		}
		
		void OnRemoveSprite(object sender, System.EventArgs e)
		{
			m_timer.Enabled=false;
			
			m_sprites.Remove(SelectedSprite);
			
			if (m_spriteNum.Value==m_sprites.Count+1)
			{
				m_spriteNum.Value--;
			}

			m_spriteNum.Maximum=m_sprites.Count;
			OnSpriteSelected(null,null);
			UpdateInfo();

			m_animIndex=0;
			m_animIndexInc=1;
			m_timer.Enabled=m_animEnable.Checked;
		}
		
		void OnAddFrame(object sender, System.EventArgs e)
		{
			m_timer.Enabled=false;

			if (m_addFrameAsCopy.Checked)
			{
				SelectedSprite.Add(new Frame(SelectedFrame));
			}
			else
			{
				SelectedSprite.Add(new Frame(SelectedFrame.Width,SelectedFrame.Height));
			}
			
			m_frameNum.Maximum=SelectedSprite.Count;
			UpdateInfo();

			m_animIndex=0;
			m_animIndexInc=1;
			m_timer.Enabled=m_animEnable.Checked;
		}
		
		void OnRemoveFrame(object sender, System.EventArgs e)
		{
			m_timer.Enabled=false;
			
			SelectedSprite.Remove(SelectedFrame);
			
			if (m_frameNum.Value==SelectedSprite.Count+1)
			{
				m_frameNum.Value--;
			}

			m_frameNum.Maximum=SelectedSprite.Count;
			OnFrameSelected(null,null);
			UpdateInfo();

			m_animIndex=0;
			m_animIndexInc=1;
			m_timer.Enabled=m_animEnable.Checked;
		}

		void OnSpriteNameKey(object sender, System.Windows.Forms.KeyPressEventArgs e)
		{
			if (!Sprite.IsValidNameChar(e.KeyChar) && e.KeyChar!='\b')
			{
				e.Handled=true;
				return;
			}
		}
		
		void OnSpriteName(object sender, System.EventArgs e)
		{
			SelectedSprite.Name=m_spriteName.Text;
		}
		
		void OnSpriteSelected(object sender, System.EventArgs e)
		{
			m_animIndex=0;
			m_animIndexInc=1;
			m_spriteName.Text=SelectedSprite.Name;
			m_frameNum.Value=1;
			m_frameNum.Maximum=SelectedSprite.Count;
			UpdateInfo();
			OnFrameSelected(null,null);
		}
		
		void OnFrameSelected(object sender, System.EventArgs e)
		{
			m_edit.Frame=SelectedFrame;
		}

		void OnTimer(object sender, System.EventArgs e)
		{
			if (m_animPong.Checked)
			{
				if (m_animIndex<=0)
				{
					m_animIndex=0;
					m_animIndexInc=1;
				}
				
				if (m_animIndex>=SelectedSprite.Count-1)
				{
					m_animIndex=SelectedSprite.Count-1;
					m_animIndexInc=-1;
				}
			}
			else
			{
				if (m_animIndex==SelectedSprite.Count)
				{
					m_animIndex=0;
				}
			}

			m_preview.Image=SelectedSprite[m_animIndex].Bitmap;

			if (m_animPong.Checked)
			{
				m_animIndex+=m_animIndexInc;
			}
			else
			{
				m_animIndex++;
			}
		}

		void OnAnimEnable(object sender, System.EventArgs e)
		{
			m_animIndex=0;
			m_animIndexInc=1;
			m_timer.Enabled=m_animEnable.Checked;
		}

		void OnAnimPingPong(object sender, System.EventArgs e)
		{
			m_animIndex=0;
			m_animIndexInc=1;
		}

		void OnAnimSpeed(object sender, System.EventArgs e)
		{
			m_timer.Interval=20*Convert.ToInt32(m_animSpeed.Value);
		}
		
		void OnAnimStretch(object sender, System.EventArgs e)
		{
			if (m_animStretch.Checked)
			{
				m_preview.SizeMode=PictureBoxSizeMode.StretchImage;
			}
			else
			{
				m_preview.SizeMode=PictureBoxSizeMode.CenterImage;
			}
		}
		
		void OnClosing(object sender, System.ComponentModel.CancelEventArgs e)
		{
			if (!ChangesAllowed)
			{
				e.Cancel=true;
			}
		}
	}
}