/*
 * Greenshot - a free and open source screenshot tool
 * Copyright (C) 2007-2020 Thomas Braun, Jens Klingen, Robin Krom
 * 
 * For more information see: http://getgreenshot.org/
 * The Greenshot project is hosted on GitHub https://github.com/greenshot/greenshot
 * 
 * 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 1 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, see <http://www.gnu.org/licenses/>.
 */

using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.Windows.Forms;
using System.Diagnostics;

namespace Greenshot
{
	public delegate void ColorPickerEventHandler(object o, ColorPickerEventArgs e);
	
	public class ColorPickerToolStripButton : ToolStripButton
	{
		private Color _color;
		public Point Offset = new Point(0,0);
		public event ColorPickerEventHandler ColorPicked;
		private readonly Greenshot.ColorDialog _cd;
		
		
		public ColorPickerToolStripButton()
		{
			_cd = Greenshot.ColorDialog.GetInstance();
			Click += ToolStripButton1Click;
		}
		
		public Color Color {
			set {_color = value;Invalidate();}
			get {return _color;}
		}
		
		protected override void OnPaint (PaintEventArgs e) {
			base.OnPaint(e);
			if(_color != null) {
				// replace transparent color with selected color
				Graphics g = e.Graphics;
				//Graphics g = Graphics.FromImage(Image);
				ColorMap[] colorMap = new ColorMap[1];
				colorMap[0] = new ColorMap
				{
					OldColor = Color.Magenta,//this.ImageTransparentColor;
					NewColor = _color
				};
				ImageAttributes attr = new ImageAttributes();
			    attr.SetRemapTable(colorMap);
			    Rectangle rect = new Rectangle(0, 0, Image.Width, Image.Height);
			  	// todo find a way to retrieve transparency offset automatically
			  	// for now, we use the public variable Offset to define this manually
			  	rect.Offset(Offset.X,Offset.Y);
			  	//Image.
			  	Debug.WriteLine("paint!"+Text+": "+_color);
			  	//ssif(color.Equals(Color.Transparent)) ((Bitmap)Image).MakeTransparent(Color.Magenta);
			    g.DrawImage(Image, rect, 0, 0, rect.Width, rect.Height, GraphicsUnit.Pixel, attr);
			    //this.Image.In
			    
			}
		}
		
		void ToolStripButton1Click(object sender, EventArgs e)
		{
			_cd.ShowDialog(Owner);
			Color = _cd.Color;
			ColorPicked?.Invoke(this, new ColorPickerEventArgs(Color));
		}
	}
	
	public class ColorPickerEventArgs : EventArgs {
		public Color Color;
		public ColorPickerEventArgs(Color color) {
			Color = color;
		}
		
	}
	
	
	
	
}