using System;
using System.Drawing;
using System.Linq;
using System.Windows.Forms;

using BizHawk.Client.Common;

namespace BizHawk.Client.EmuHawk
{
	public partial class TAStudio
	{
		// Input Painting
		private string _startBoolDrawColumn = string.Empty;
		private string _startFloatDrawColumn = string.Empty;
		private bool _boolPaintState;
		private float _floatPaintState;
		private bool _startMarkerDrag;
		private bool _startFrameDrag;
		private bool _frameDragState;
		private bool _supressContextMenu;
		// SuuperW: For editing analog input
		private string _floatEditColumn = string.Empty;
		private int _floatEditRow = -1;
		private string _floatTypedValue;
		private int _floatEditYPos = -1;
		// Right-click dragging
		private string[] _rightClickInput = null;
		private string[] _rightClickOverInput = null;
		private int _rightClickFrame = -1;
		private int _rightClickLastFrame = -1;
		private bool _rightClickShift, _rightClickControl;
		private bool _leftButtonHeld = false;
		private bool mouseButtonHeld
		{
			get
			{ // Need a left click
				return _rightClickFrame != -1 || _leftButtonHeld;
			}
		}

		private bool _triggerAutoRestore; // If true, autorestore will be called on mouse up
		private int? _triggerAutoRestoreFromFrame; // If set and _triggerAutoRestore is true, will call GoToFrameIfNecessary() with this value

		public static Color CurrentFrame_FrameCol = Color.FromArgb(0xCFEDFC);
		public static Color CurrentFrame_InputLog = Color.FromArgb(0xB5E7F7);

		public static Color GreenZone_FrameCol = Color.FromArgb(0xDDFFDD);
		public static Color GreenZone_Invalidated_FrameCol = Color.FromArgb(0xFFFFFF);
		public static Color GreenZone_InputLog = Color.FromArgb(0xC4F7C8);
		public static Color GreenZone_Invalidated_InputLog = Color.FromArgb(0xE0FBE0);

		public static Color LagZone_FrameCol = Color.FromArgb(0xFFDCDD);
		public static Color LagZone_Invalidated_FrameCol = Color.FromArgb(0xFFE9E9);
		public static Color LagZone_InputLog = Color.FromArgb(0xF0D0D2);
		public static Color LagZone_Invalidated_InputLog = Color.FromArgb(0xF7E5E5);

		public static Color Marker_FrameCol = Color.FromArgb(0xF7FFC9);
		public static Color AnalogEdit_Col = Color.FromArgb(0x909070); // SuuperW: When editing an analog value, it will be a gray color.

		private Emulation.Common.ControllerDefinition controllerType
		{ get { return Global.MovieSession.MovieControllerAdapter.Type; } }

		public AutoPatternBool[] BoolPatterns;
		public AutoPatternFloat[] FloatPatterns;

		#region Query callbacks

		private void TasView_QueryItemIcon(int index, InputRoll.RollColumn column, ref Bitmap bitmap)
		{
			var columnName = column.Name;

			if (columnName == MarkerColumnName)
			{
				if (index == Emulator.Frame && index == GlobalWin.MainForm.PauseOnFrame)
				{
					bitmap = TasView.HorizontalOrientation ?
						Properties.Resources.ts_v_arrow_green_blue :
						Properties.Resources.ts_h_arrow_green_blue;
				}
				else if (index == Emulator.Frame)
				{
					bitmap = TasView.HorizontalOrientation ?
						Properties.Resources.ts_v_arrow_blue :
						Properties.Resources.ts_h_arrow_blue;
				}
				else if (index == GlobalWin.MainForm.PauseOnFrame)
				{
					bitmap = TasView.HorizontalOrientation ?
						Properties.Resources.ts_v_arrow_green :
						Properties.Resources.ts_h_arrow_green;
				}
			}
		}

		private void TasView_QueryItemBkColor(int index, InputRoll.RollColumn column, ref Color color)
		{
			var columnName = column.Name;
			var record = CurrentTasMovie[index];

			if (columnName == MarkerColumnName)
			{
				if (VersionInfo.DeveloperBuild) // For debugging purposes, let's visually show the state frames
				{
					color = (record.HasState ? color = Color.FromArgb(0xEEEEEE) : Color.White);
				}

				return;
			}

			if (columnName == FrameColumnName)
			{
				if (Emulator.Frame == index)
				{
					color = CurrentFrame_FrameCol;
				}
				else if (CurrentTasMovie.Markers.IsMarker(index))
				{
					color = Marker_FrameCol;
				}
				else if (record.Lagged.HasValue)
				{
					color = record.Lagged.Value ?
						LagZone_FrameCol :
						GreenZone_FrameCol;
				}
				else if (record.WasLagged.HasValue)
				{
					color = record.WasLagged.Value ?
						LagZone_Invalidated_FrameCol :
						GreenZone_Invalidated_FrameCol;
				}
				else
				{
					color = Color.White;
				}
			}
			else
			{
				// SuuperW: Analog editing is indicated by a color change.
				if (index == _floatEditRow && columnName == _floatEditColumn)
				{
					color = AnalogEdit_Col;
					return;
				}
				if (Emulator.Frame == index)
				{
					color = CurrentFrame_InputLog;
				}
				else
				{
					if (record.Lagged.HasValue)
					{
						color = record.Lagged.Value ?
							LagZone_InputLog :
							GreenZone_InputLog;
					}
					else if (record.WasLagged.HasValue)
					{
						color = record.WasLagged.Value ?
							LagZone_Invalidated_InputLog :
							GreenZone_Invalidated_FrameCol;
					}
					else
					{
						color = Color.FromArgb(0xFFFEEE);
					}
				}
			}
		}

		private void TasView_QueryItemText(int index, InputRoll.RollColumn column, out string text)
		{
			try
			{
				text = string.Empty;
				var columnName = column.Name;

				if (columnName == MarkerColumnName)
				{
					// Do nothing
				}
				else if (columnName == FrameColumnName)
				{
					text = (index).ToString().PadLeft(CurrentTasMovie.InputLogLength.ToString().Length, '0');
				}
				else
				{
					if (index < CurrentTasMovie.InputLogLength)
						text = CurrentTasMovie.DisplayValue(index, columnName);
				}
			}
			catch (Exception ex)
			{
				text = string.Empty;
				MessageBox.Show("oops\n" + ex);
			}
		}

		// SuuperW: Used in InputRoll.cs to hide lag frames.
		private bool TasView_QueryFrameLag(int index, bool hideWasLag)
		{
			TasMovieRecord lag = CurrentTasMovie[index];
			return (lag.Lagged.HasValue && lag.Lagged.Value) || (hideWasLag && lag.WasLagged.HasValue && lag.WasLagged.Value);
		}

		#endregion

		#region Events

		private void TasView_ColumnClick(object sender, InputRoll.ColumnClickEventArgs e)
		{
			if (TasView.SelectedRows.Any())
			{
				var columnName = e.Column.Name;

				if (columnName == FrameColumnName)
				{
					CurrentTasMovie.Markers.Add(TasView.LastSelectedIndex.Value, "");
					RefreshDialog();

				}
				else if (columnName != MarkerColumnName) // TODO: what about float?
				{
					foreach (var index in TasView.SelectedRows)
					{
						CurrentTasMovie.ToggleBoolState(index, columnName);
						_triggerAutoRestore = true;
						_triggerAutoRestoreFromFrame = TasView.SelectedRows.Min();
					}

					RefreshDialog();
				}
			}
		}

		private void TasView_ColumnRightClick(object sender, InputRoll.ColumnClickEventArgs e)
		{
			e.Column.Emphasis ^= true;

			UpdateAutoFire(e.Column.Name, e.Column.Emphasis);

			RefreshTasView();
		}
		private void UpdateAutoFire()
		{
			for (int i = 2; i < TasView.AllColumns.Count; i++)
				UpdateAutoFire(TasView.AllColumns[i].Name, TasView.AllColumns[i].Emphasis);
		}
		public void UpdateAutoFire(string button, bool? isOn)
		{
			if (!isOn.HasValue) // No value means don't change whether it's on or off.
				isOn = TasView.AllColumns.Find(c => c.Name == button).Emphasis;

			int index = 0;
			if (autoHoldToolStripMenuItem.Checked) index = 1;
			if (autoFireToolStripMenuItem.Checked) index = 2;
			if (controllerType.BoolButtons.Contains(button))
			{
				if (index == 0)
					index = controllerType.BoolButtons.IndexOf(button);
				else
					index += controllerType.BoolButtons.Count - 1;
				AutoPatternBool p = BoolPatterns[index];
				Global.AutofireStickyXORAdapter.SetSticky(button, isOn.Value, p);
			}
			else
			{
				if (index == 0)
					index = controllerType.FloatControls.IndexOf(button);
				else
					index += controllerType.FloatControls.Count - 1;
				float? value = null;
				if (isOn.Value) value = 0f;
				AutoPatternFloat p = FloatPatterns[index];
				Global.AutofireStickyXORAdapter.SetFloat(button, value, p);
			}
		}

		private void TasView_ColumnReordered(object sender, InputRoll.ColumnReorderedEventArgs e)
		{
			CurrentTasMovie.FlagChanges();
		}

		private void TasView_MouseEnter(object sender, EventArgs e)
		{
			TasView.Focus();
		}

		private void TasView_MouseDown(object sender, MouseEventArgs e)
		{
			// Clicking with left while right is held or vice versa does weird stuff
			if (mouseButtonHeld)
				return;

			if (e.Button == MouseButtons.Middle)
			{
				TogglePause();
				return;
			}

			// SuuperW: Moved these.
			if (TasView.CurrentCell == null || !TasView.CurrentCell.RowIndex.HasValue || TasView.CurrentCell.Column == null)
				return;

			var frame = TasView.CurrentCell.RowIndex.Value;
			var buttonName = TasView.CurrentCell.Column.Name;


			if (e.Button == MouseButtons.Left)
			{
				_leftButtonHeld = true;
				// SuuperW: Exit float editing mode, or re-enter mouse editing
				if (_floatEditRow != -1)
				{
					if (_floatEditColumn != buttonName || _floatEditRow != frame)
					{
						_floatEditRow = -1;
						RefreshTasView();
					}
					else
					{
						_floatEditYPos = e.Y;
						_floatPaintState = CurrentTasMovie.GetFloatState(frame, buttonName);
						return;
					}
				}

				if (TasView.CurrentCell.Column.Name == MarkerColumnName)
				{
					_startMarkerDrag = true;
					GoToFrame(TasView.CurrentCell.RowIndex.Value);
				}
				else if (TasView.CurrentCell.Column.Name == FrameColumnName)
				{
					_startFrameDrag = true;
					_frameDragState = TasView.SelectedRows.Contains(frame);
				}
				else // User changed input
				{
					if (Global.MovieSession.MovieControllerAdapter.Type.BoolButtons.Contains(buttonName))
					{
						CurrentTasMovie.ChangeLog.BeginNewBatch("Paint Bool");

						CurrentTasMovie.ToggleBoolState(TasView.CurrentCell.RowIndex.Value, buttonName);
						_triggerAutoRestore = true;
						_triggerAutoRestoreFromFrame = TasView.CurrentCell.RowIndex.Value;
						RefreshDialog();

						_startBoolDrawColumn = buttonName;

						_boolPaintState = CurrentTasMovie.BoolIsPressed(frame, buttonName);
					}
					else
					{
						if (frame >= CurrentTasMovie.InputLogLength)
						{
							CurrentTasMovie.SetFloatState(frame, buttonName, 0);
							RefreshDialog();
						}

						_floatPaintState = CurrentTasMovie.GetFloatState(frame, buttonName);

						if (e.Clicks != 2)
						{
							CurrentTasMovie.ChangeLog.BeginNewBatch("Paint Float");
							_startFloatDrawColumn = buttonName;
						}
						else // Double-click enters float editing mode
						{
							if (_floatEditColumn == buttonName && _floatEditRow == frame)
								_floatEditRow = -1;
							else
							{
								CurrentTasMovie.ChangeLog.BeginNewBatch("Float Edit: " + frame);
								_floatEditColumn = buttonName;
								_floatEditRow = frame;
								_floatTypedValue = "";
								_floatEditYPos = e.Y;
								_triggerAutoRestore = true;
								_triggerAutoRestoreFromFrame = frame;
							}
							RefreshDialog();
						}
					}
				}
			}
			else if (e.Button == System.Windows.Forms.MouseButtons.Right)
			{
				if (TasView.CurrentCell.Column.Name == FrameColumnName && frame < CurrentTasMovie.InputLogLength)
				{
					_rightClickControl = (Control.ModifierKeys | Keys.Control) == Control.ModifierKeys;
					_rightClickShift = (Control.ModifierKeys | Keys.Shift) == Control.ModifierKeys;
					if (TasView.SelectedRows.Contains(frame))
					{
						_rightClickInput = new string[TasView.SelectedRows.Count()];
						_rightClickFrame = TasView.FirstSelectedIndex.Value;
						CurrentTasMovie.GetLogEntries().CopyTo(_rightClickFrame, _rightClickInput, 0, TasView.SelectedRows.Count());
						if (_rightClickControl && _rightClickShift)
							_rightClickFrame += _rightClickInput.Length;
					}
					else
					{
						_rightClickInput = new string[1];
						_rightClickInput[0] = CurrentTasMovie.GetLogEntries()[frame];
						_rightClickFrame = frame;
					}
					_rightClickLastFrame = -1;
					// TODO: Turn off ChangeLog.IsRecording and handle the GeneralUndo here.
					CurrentTasMovie.ChangeLog.BeginNewBatch("Right-Click Edit");
				}
			}
		}

		private void TasView_MouseUp(object sender, MouseEventArgs e)
		{
			if (e.Button == MouseButtons.Right && !TasView.IsPointingAtColumnHeader && !_supressContextMenu)
			{
				RightClickMenu.Show(TasView, e.X, e.Y);
			}
			else if (e.Button == MouseButtons.Left)
			{
				_startMarkerDrag = false;
				_startFrameDrag = false;
				_startBoolDrawColumn = string.Empty;
				_startFloatDrawColumn = string.Empty;
				// Exit float editing if value was changed with cursor
				if (_floatEditRow != -1 && _floatPaintState != CurrentTasMovie.GetFloatState(_floatEditRow, _floatEditColumn))
				{
					_floatEditRow = -1;
					RefreshDialog();
				}
				_floatPaintState = 0;
				_floatEditYPos = -1;
				_leftButtonHeld = false;

				if (_floatEditRow == -1)
					CurrentTasMovie.ChangeLog.EndBatch();
			}

			if (e.Button == System.Windows.Forms.MouseButtons.Right)
			{
				if (_rightClickFrame != -1)
				{
					_rightClickInput = null;
					_rightClickFrame = -1;
					CurrentTasMovie.ChangeLog.EndBatch();
				}
			}

			_supressContextMenu = false;

			DoTriggeredAutoRestoreIfNeeded();
		}

		private void TasView_MouseWheel(object sender, MouseEventArgs e)
		{
			if (TasView.RightButtonHeld && TasView.CurrentCell.RowIndex.HasValue)
			{
				_supressContextMenu = true;
				if (e.Delta < 0)
				{
					GoToNextFrame();
				}
				else
				{
					GoToPreviousFrame();
				}
			}
		}

		private void TasView_MouseDoubleClick(object sender, MouseEventArgs e)
		{
			if (e.Button == MouseButtons.Left)
			{
				var buttonName = TasView.CurrentCell.Column.Name;

				if (TasView.CurrentCell.RowIndex.HasValue &&
					buttonName == FrameColumnName)
				{
					if (Settings.EmptyMarkers)
					{
						CurrentTasMovie.Markers.Add(TasView.CurrentCell.RowIndex.Value, string.Empty);
						RefreshDialog();
					}
					else
					{
						CallAddMarkerPopUp(TasView.CurrentCell.RowIndex.Value);
					}
				}
			}
		}

		private void TasView_PointedCellChanged(object sender, InputRoll.CellEventArgs e)
		{
			// TODO: think about nullability
			// For now return if a null because this happens OnEnter which doesn't have any of the below behaviors yet?
			// Most of these are stupid but I got annoyed at null crashes
			if (e.OldCell == null || e.OldCell.Column == null || e.OldCell.RowIndex == null ||
				e.NewCell == null || e.NewCell.RowIndex == null || e.NewCell.Column == null)
			{
				return;
			}

			int startVal, endVal;
			int frame = e.NewCell.RowIndex.Value;
			if (e.OldCell.RowIndex.Value < e.NewCell.RowIndex.Value)
			{
				startVal = e.OldCell.RowIndex.Value;
				endVal = e.NewCell.RowIndex.Value;
			}
			else
			{
				startVal = e.NewCell.RowIndex.Value;
				endVal = e.OldCell.RowIndex.Value;
			}

			if (_startMarkerDrag)
			{
				if (e.NewCell.RowIndex.HasValue)
				{
					GoToFrame(e.NewCell.RowIndex.Value);
				}
			}
			else if (_startFrameDrag)
			{
				if (e.OldCell.RowIndex.HasValue && e.NewCell.RowIndex.HasValue)
				{
					for (var i = startVal; i <= endVal; i++)
					{
						TasView.SelectRow(i, _frameDragState);
					}

					RefreshTasView();
				}
			}

			else if (_rightClickFrame != -1)
			{
				_supressContextMenu = true;
				if (frame > CurrentTasMovie.InputLogLength - _rightClickInput.Length)
					frame = CurrentTasMovie.InputLogLength - _rightClickInput.Length;
				if (_rightClickShift)
				{
					if (_rightClickControl) // Insert
					{
						// If going backwards, delete!
						bool shouldInsert = true;
						if (startVal < _rightClickFrame)
						{ // Cloning to a previous frame makes no sense.
							startVal = _rightClickFrame - 1;
						}
						if (startVal < _rightClickLastFrame)
							shouldInsert = false;

						if (shouldInsert)
						{
							for (int i = startVal + 1; i <= endVal; i++)
								CurrentTasMovie.InsertInput(i, _rightClickInput[(i - _rightClickFrame) % _rightClickInput.Length]);
						}
						else
						{
							CurrentTasMovie.RemoveFrames(startVal + 1, endVal + 1);
						}

						_rightClickLastFrame = frame;
					}
					else // Overwrite
					{
						for (int i = startVal; i <= endVal; i++)
							CurrentTasMovie.SetFrame(i, _rightClickInput[(_rightClickFrame - i) % _rightClickInput.Length]);
					}
				}
				else
				{
					if (_rightClickControl)
					{
						for (int i = 0; i < _rightClickInput.Length; i++) // Re-set initial range, just to verify it's still there.
							CurrentTasMovie.SetFrame(_rightClickFrame + i, _rightClickInput[i]);

						if (_rightClickOverInput != null) // Restore overwritten input from previous movement
						{
							for (int i = 0; i < _rightClickOverInput.Length; i++)
								CurrentTasMovie.SetFrame(_rightClickLastFrame + i, _rightClickOverInput[i]);
						}
						else
							_rightClickOverInput = new string[_rightClickInput.Length];

						_rightClickLastFrame = frame; // Set new restore log
						CurrentTasMovie.GetLogEntries().CopyTo(frame, _rightClickOverInput, 0, _rightClickOverInput.Length);

						for (int i = 0; i < _rightClickInput.Length; i++) // Place copied input
							CurrentTasMovie.SetFrame(frame + i, _rightClickInput[i]);
					}
					else
					{
						int shiftBy = _rightClickFrame - frame;
						string[] shiftInput = new string[Math.Abs(shiftBy)];
						int shiftFrom = frame;
						if (shiftBy < 0)
							shiftFrom = _rightClickFrame + _rightClickInput.Length;

						CurrentTasMovie.GetLogEntries().CopyTo(shiftFrom, shiftInput, 0, shiftInput.Length);
						int shiftTo = shiftFrom + (_rightClickInput.Length * Math.Sign(shiftBy));
						for (int i = 0; i < shiftInput.Length; i++)
							CurrentTasMovie.SetFrame(shiftTo + i, shiftInput[i]);

						for (int i = 0; i < _rightClickInput.Length; i++)
							CurrentTasMovie.SetFrame(frame + i, _rightClickInput[i]);
						_rightClickFrame = frame;
					}
				}
				RefreshTasView();
			}

			else if (TasView.IsPaintDown && e.NewCell.RowIndex.HasValue && !string.IsNullOrEmpty(_startBoolDrawColumn))
			{
				if (e.OldCell.RowIndex.HasValue && e.NewCell.RowIndex.HasValue)
				{
					for (var i = startVal; i <= endVal; i++) // SuuperW: <= so that it will edit the cell you are hovering over. (Inclusive)
					{
						CurrentTasMovie.SetBoolState(i, _startBoolDrawColumn, _boolPaintState); // Notice it uses new row, old column, you can only paint across a single column
						_triggerAutoRestore = true;
						_triggerAutoRestoreFromFrame = TasView.CurrentCell.RowIndex.Value;
					}

					RefreshTasView();
				}
			}

			else if (TasView.IsPaintDown && e.NewCell.RowIndex.HasValue && !string.IsNullOrEmpty(_startFloatDrawColumn))
			{
				if (e.OldCell.RowIndex.HasValue && e.NewCell.RowIndex.HasValue)
				{
					for (var i = startVal; i <= endVal; i++) // SuuperW: <= so that it will edit the cell you are hovering over. (Inclusive)
					{
						if (i < CurrentTasMovie.InputLogLength)
						{
							CurrentTasMovie.SetFloatState(i, _startFloatDrawColumn, _floatPaintState); // Notice it uses new row, old column, you can only paint across a single column
							_triggerAutoRestore = true;
							_triggerAutoRestoreFromFrame = TasView.CurrentCell.RowIndex.Value;
						}
					}

					RefreshTasView();
				}
			}
		}

		private void TasView_MouseMove(object sender, MouseEventArgs e)
		{
			// For float editing
			int increment = (_floatEditYPos - e.Y) / 3;
			if (_floatEditYPos == -1)
				return;

			float value = _floatPaintState + increment;
			Emulation.Common.ControllerDefinition.FloatRange range = Global.MovieSession.MovieControllerAdapter.Type.FloatRanges
				[Global.MovieSession.MovieControllerAdapter.Type.FloatControls.IndexOf(_floatEditColumn)];
			// Range for N64 Y axis has max -128 and min 127. That should probably be fixed in ControllerDefinition.cs.
			// SuuperW: I really don't think changing it would break anything, but adelikat isn't so sure.
			float rMax = range.Max;
			float rMin = range.Min;
			if (rMax < rMin)
			{
				rMax = range.Min;
				rMin = range.Max;
			}
			if (value > rMax)
				value = rMax;
			else if (value < rMin)
				value = rMin;

			CurrentTasMovie.SetFloatState(_floatEditRow, _floatEditColumn, value);

			RefreshDialog();
		}

		private void TasView_SelectedIndexChanged(object sender, EventArgs e)
		{
			SetSplicer();
		}

		private void TasView_KeyDown(object sender, KeyEventArgs e)
		{
			if (e.Control && !e.Shift && !e.Alt && e.KeyCode == Keys.Left) // Ctrl + Left
			{
				GoToPreviousMarker();
			}
			else if (e.Control && !e.Shift && !e.Alt && e.KeyCode == Keys.Right) // Ctrl + Left
			{
				GoToNextMarker();
			}
			else if (e.Control && !e.Shift && !e.Alt && e.KeyCode == Keys.Up) // Ctrl + Up
			{
				GoToPreviousFrame();
			}
			else if (e.Control && !e.Shift && !e.Alt && e.KeyCode == Keys.Down) // Ctrl + Down
			{
				GoToNextFrame();
			}
			else if (e.Control && !e.Alt && e.Shift && e.KeyCode == Keys.R) // Ctrl + Shift + R
			{
				TasView.HorizontalOrientation ^= true;
			}

			// SuuperW: Float Editing
			if (_floatEditRow != -1)
			{
				float value = CurrentTasMovie.GetFloatState(_floatEditRow, _floatEditColumn);
				Emulation.Common.ControllerDefinition.FloatRange range = Global.MovieSession.MovieControllerAdapter.Type.FloatRanges
					[Global.MovieSession.MovieControllerAdapter.Type.FloatControls.IndexOf(_floatEditColumn)];
				// Range for N64 Y axis has max -128 and min 127. That should probably be fixed ControllerDefinition.cs, but I'll put a quick fix here anyway.
				float rMax = range.Max;
				float rMin = range.Min;
				if (rMax < rMin)
				{
					rMax = range.Min;
					rMin = range.Max;
				}
				if (e.KeyCode == Keys.Right)
					value = rMax;
				else if (e.KeyCode == Keys.Left)
					value = rMin;
				else if (e.KeyCode >= Keys.D0 && e.KeyCode <= Keys.D9)
					_floatTypedValue += e.KeyCode - Keys.D0;
				else if (e.KeyCode >= Keys.NumPad0 && e.KeyCode <= Keys.NumPad9)
					_floatTypedValue += e.KeyCode - Keys.NumPad0;
				else if (e.KeyCode == Keys.OemMinus)
				{
					if (_floatTypedValue.StartsWith("-"))
						_floatTypedValue = _floatTypedValue.Substring(1);
					else
						_floatTypedValue = "-" + _floatTypedValue;
				}
				else if (e.KeyCode == Keys.Back)
				{
					if (_floatTypedValue == "") // Very first key press is backspace?
						_floatTypedValue = value.ToString();
					_floatTypedValue = _floatTypedValue.Substring(0, _floatTypedValue.Length - 1);
					if (_floatTypedValue == "" || _floatTypedValue == "-")
						value = 0f;
					else
						value = Convert.ToSingle(_floatTypedValue);
				}
				else if (e.KeyCode == Keys.Escape)
				{
					if (_floatEditYPos != -1) // Cancel change from dragging cursor
					{
						_floatEditYPos = -1;
						CurrentTasMovie.SetFloatState(_floatEditRow, _floatEditColumn, _floatPaintState);
					}
					_floatEditRow = -1;
				}
				else
				{
					float changeBy = 0;
					if (e.KeyCode == Keys.Up)
						changeBy = 1; // We're assuming for now that ALL float controls should contain integers.
					else if (e.KeyCode == Keys.Down)
						changeBy = -1;
					if (e.Shift)
						changeBy *= 10;
					value += changeBy;
					if (changeBy != 0)
						_floatTypedValue = value.ToString();
				}

				if (_floatEditRow == -1)
					CurrentTasMovie.ChangeLog.EndBatch();
				else
				{
					if (_floatTypedValue == "")
					{
						value = 0f;
						CurrentTasMovie.SetFloatState(_floatEditRow, _floatEditColumn, value);
					}
					else
					{
						value = Convert.ToSingle(_floatTypedValue);
						if (value > rMax)
							value = rMax;
						else if (value < rMin)
							value = rMin;
						CurrentTasMovie.SetFloatState(_floatEditRow, _floatEditColumn, value);
					}
				}

			}

			RefreshDialog();
		}

		/// <summary>
		/// This allows arrow keys to be detected by KeyDown.
		/// </summary>
		private void TasView_PreviewKeyDown(object sender, PreviewKeyDownEventArgs e)
		{
			if (e.KeyCode == Keys.Left || e.KeyCode == Keys.Right || e.KeyCode == Keys.Up || e.KeyCode == Keys.Down)
				e.IsInputKey = true;
		}
		#endregion
	}
}