CommonTools/ColorPickerCtrl/EyedropColorPicker.cs

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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Data;
using System.Text;
using System.Windows.Forms;
using System.Reflection;

namespace CommonTools
{
	class EyedropColorPicker : Control
	{
		public event EventHandler SelectedColorChanged;

		Bitmap	m_snapshot;
		Bitmap	m_icon;
		Color	m_selectedColor;
		float  m_zoom = 4;
		public int Zoom
		{
			get { return (int)m_zoom; }
			set 
			{ 
				m_zoom = value;
				RecalcSnapshotSize();
			}
		}
		public Color SelectedColor
		{
			get { return m_selectedColor; }
			set 
			{
				if (m_selectedColor == value)
					return;
			}
		}
		public EyedropColorPicker()
		{
			this.DoubleBuffered = true;
			m_icon = new Bitmap(typeof(EyedropColorPicker), "ColorPickerCtrl.Resources.eyedropper.bmp");
			m_icon.MakeTransparent(Color.Magenta);
		}
		RectangleF ImageRect
		{
			get
			{
				return Util.Rect(ClientRectangle);
			}
		}
		protected override void OnResize(EventArgs e)
		{
			base.OnResize(e);
			RecalcSnapshotSize();
		}
		void RecalcSnapshotSize()
		{
			if (m_snapshot != null)
				m_snapshot.Dispose();