using System;

using System.Collections.Generic;

using System.Text;

using System.Drawing;

using System.Windows.Forms;

using System.Reflection;

using System.ComponentModel;

namespace Aga.Controls.Tree.NodeControls

{

	public class NodeTextBox : BaseTextControl

	{

		private const int MinTextBoxWidth = 30;

		public NodeTextBox()

		{

		}

		protected override Size CalculateEditorSize(EditorContext context)

		{

			if (Parent.UseColumns)

				return context.Bounds.Size;

			else

			{

				Size size = GetLabelSize(context.CurrentNode, context.DrawContext, _label);

				int width = Math.Max(size.Width + Font.Height, MinTextBoxWidth); // reserve a place for new typed character

				return new Size(width, size.Height);

			}

		}

		public override void KeyDown(KeyEventArgs args)

		{

			if (args.KeyCode == Keys.F2 && Parent.CurrentNode != null && EditEnabled)

			{

				args.Handled = true;

				BeginEdit();

			}

		}

		protected override Control CreateEditor(TreeNodeAdv node)

		{

			TextBox textBox = CreateTextBox();

			textBox.TextAlign = TextAlign;

			textBox.Text = GetLabel(node);

			textBox.BorderStyle = BorderStyle.FixedSingle;

			textBox.TextChanged += EditorTextChanged;

			textBox.KeyDown += EditorKeyDown;

			_label = textBox.Text;

			SetEditControlProperties(textBox, node);

			return textBox;

		}

		protected virtual TextBox CreateTextBox()

		{

			return new TextBox();

		}

		protected override void DisposeEditor(Control editor)

		{

			var textBox = editor as TextBox;

			textBox.TextChanged -= EditorTextChanged;

			textBox.KeyDown -= EditorKeyDown;

		}

		private void EditorKeyDown(object sender, KeyEventArgs e)

		{

			if (e.KeyCode == Keys.Escape)

				EndEdit(false);

			else if (e.KeyCode == Keys.Enter)

				EndEdit(true);

		}

		private string _label;

		private void EditorTextChanged(object sender, EventArgs e)

		{

			var textBox = sender as TextBox;

			_label = textBox.Text;

			Parent.UpdateEditorBounds();

		}

		protected override void DoApplyChanges(TreeNodeAdv node, Control editor)

		{

			var label = (editor as TextBox).Text;

			string oldLabel = GetLabel(node);

			if (oldLabel != label)

			{

				SetLabel(node, label);

				OnLabelChanged(node.Tag, oldLabel, label);

			}

		}

		public override void Cut(Control control)

		{

			(control as TextBox).Cut();

		}

		public override void Copy(Control control)

		{

			(control as TextBox).Copy();

		}

		public override void Paste(Control control)

		{

			(control as TextBox).Paste();

		}

		public override void Delete(Control control)

		{

			var textBox = control as TextBox;

			int len = Math.Max(textBox.SelectionLength, 1);

			if (textBox.SelectionStart < textBox.Text.Length)

			{

				int start = textBox.SelectionStart;

				textBox.Text = textBox.Text.Remove(textBox.SelectionStart, len);

				textBox.SelectionStart = start;

			}

		}

		public event EventHandler<LabelEventArgs> LabelChanged;

		protected void OnLabelChanged(object subject, string oldLabel, string newLabel)

		{

			if (LabelChanged != null)

				LabelChanged(this, new LabelEventArgs(subject, oldLabel, newLabel));

		}

	}

}