// ***********************************************************************
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// Assembly : HZH_Controls
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// Created : 2019-09-28
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//
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// ***********************************************************************
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// <copyright file="UCSampling.cs">
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// Copyright by Huang Zhenghui(黄正辉) All, QQ group:568015492 QQ:623128629 Email:623128629@qq.com
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// </copyright>
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//
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// Blog: https://www.cnblogs.com/bfyx
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// GitHub：https://github.com/kwwwvagaa/NetWinformControl
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// gitee：https://gitee.com/kwwwvagaa/net_winform_custom_control.git
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//
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// If you use this code, please keep this note.
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// ***********************************************************************
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using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Drawing;
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using System.Drawing.Drawing2D;
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using System.Windows.Forms;
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namespace DPumpHydr.WinFrmUI.WenSkin.Controls
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{
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/// <summary>
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/// Class UCSampling.
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/// Implements the <see cref="UserControl" />
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/// </summary>
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/// <seealso cref="UserControl" />
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public class UCSampling : UserControl
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{
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/// <summary>
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/// The sampling imag
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/// </summary>
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private Bitmap samplingImag = null;
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/// <summary>
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/// Gets or sets the sampling imag.
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/// </summary>
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/// <value>The sampling imag.</value>
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[Browsable(true), Category("自定义属性"), Description("采样图片"), Localizable(true)]
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public Bitmap SamplingImag
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{
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get { return samplingImag; }
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set
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{
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samplingImag = value;
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ResetBorderPath();
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Invalidate();
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}
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}
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/// <summary>
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/// The transparent
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/// </summary>
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private Color? transparent = null;
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/// <summary>
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/// Gets or sets the transparent.
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/// </summary>
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/// <value>The transparent.</value>
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[Browsable(true), Category("自定义属性"), Description("透明色，如果为空，则使用0,0坐标处的颜色"), Localizable(true)]
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public Color? Transparent
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{
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get { return transparent; }
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set
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{
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transparent = value;
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ResetBorderPath();
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Invalidate();
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}
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}
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/// <summary>
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/// The alpha
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/// </summary>
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private int alpha = 50;
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/// <summary>
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/// Gets or sets the alpha.
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/// </summary>
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/// <value>The alpha.</value>
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[Browsable(true), Category("自定义属性"), Description("当作透明色的透明度，小于此透明度的颜色将被认定为透明，0-255"), Localizable(true)]
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public int Alpha
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{
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get { return alpha; }
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set
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{
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if (value < 0 || value > 255)
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return;
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alpha = value;
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ResetBorderPath();
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Invalidate();
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}
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}
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/// <summary>
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/// The color threshold
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/// </summary>
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private int colorThreshold = 10;
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/// <summary>
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/// Gets or sets the color threshold.
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/// </summary>
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/// <value>The color threshold.</value>
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[Browsable(true), Category("自定义属性"), Description("透明色颜色阀值"), Localizable(true)]
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public int ColorThreshold
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{
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get { return colorThreshold; }
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set
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{
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colorThreshold = value;
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ResetBorderPath();
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Invalidate();
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}
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}
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/// <summary>
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/// The bit cache
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/// </summary>
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private Bitmap _bitCache;
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/// <summary>
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/// Initializes a new instance of the <see cref="UCSampling"/> class.
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/// </summary>
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public UCSampling()
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{
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SetStyle(ControlStyles.AllPaintingInWmPaint, true);
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SetStyle(ControlStyles.DoubleBuffer, true);
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SetStyle(ControlStyles.ResizeRedraw, true);
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SetStyle(ControlStyles.Selectable, true);
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SetStyle(ControlStyles.SupportsTransparentBackColor, true);
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SetStyle(ControlStyles.UserPaint, true);
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SizeChanged += UCSampling_SizeChanged;
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Size = new Size(35, 35);
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}
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/// <summary>
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/// The m border path
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/// </summary>
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GraphicsPath m_borderPath = new GraphicsPath();
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/// <summary>
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/// Handles the SizeChanged event of the UCSampling control.
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/// </summary>
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/// <param name="sender">The source of the event.</param>
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/// <param name="e">The <see cref="EventArgs"/> instance containing the event data.</param>
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void UCSampling_SizeChanged(object sender, EventArgs e)
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{
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ResetBorderPath();
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}
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/// <summary>
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/// Resets the border path.
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/// </summary>
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private void ResetBorderPath()
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{
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if (samplingImag == null)
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{
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m_borderPath = ClientRectangle.CreateRoundedRectanglePath(5);
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}
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else
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{
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var bit = new Bitmap(ClientRectangle.Width, ClientRectangle.Height);
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using (var bitg = Graphics.FromImage(bit))
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{
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bitg.DrawImage(samplingImag, ClientRectangle, 0, 0, samplingImag.Width, samplingImag.Height, GraphicsUnit.Pixel);
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}
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_bitCache = bit;
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m_borderPath = new GraphicsPath();
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List<PointF> lstPoints = GetBorderPoints(bit, transparent ?? samplingImag.GetPixel(0, 0));
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m_borderPath.AddLines(lstPoints.ToArray());
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m_borderPath.CloseAllFigures();
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}
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}
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/// <summary>
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/// Gets the border points.
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/// </summary>
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/// <param name="bit">The bit.</param>
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/// <param name="transparent">The transparent.</param>
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/// <returns>List<PointF>.</returns>
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private List<PointF> GetBorderPoints(Bitmap bit, Color transparent)
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{
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float diameter = (float)Math.Sqrt(bit.Width * bit.Width + bit.Height * bit.Height);
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int intSplit = (int)(7 - (diameter - 200) / 100);
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if (intSplit < 1)
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intSplit = 1;
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List<PointF> lstPoint = new List<PointF>();
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for (int i = 0; i < 360; i += intSplit)
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{
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for (int j = (int)diameter / 2; j > 5; j--)
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{
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Point p = GetPointByAngle(i, j, new PointF(bit.Width / 2, bit.Height / 2));
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if (p.X < 0 || p.Y < 0 || p.X >= bit.Width || p.Y >= bit.Height)
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continue;
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Color _color = bit.GetPixel(p.X, p.Y);
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if (!(_color.A <= alpha || IsLikeColor(_color, transparent)))
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{
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if (!lstPoint.Contains(p))
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{
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lstPoint.Add(p);
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}
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break;
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}
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}
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}
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return lstPoint;
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}
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/// <summary>
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/// Determines whether [is like color] [the specified color1].
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/// </summary>
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/// <param name="color1">The color1.</param>
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/// <param name="color2">The color2.</param>
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/// <returns><c>true</c> if [is like color] [the specified color1]; otherwise, <c>false</c>.</returns>
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private bool IsLikeColor(Color color1, Color color2)
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{
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var cv = Math.Sqrt(Math.Pow(color1.R - color2.R, 2) + Math.Pow(color1.G - color2.G, 2) + Math.Pow(color1.B - color2.B, 2));
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if (cv <= colorThreshold)
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return true;
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else
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return false;
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}
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#region 根据角度得到坐标 English:Get coordinates from angles
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/// <summary>
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/// 功能描述:根据角度得到坐标 English:Get coordinates from angles
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/// 作 者:HZH
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/// 创建日期:2019-09-28 11:56:25
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/// 任务编号:POS
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/// </summary>
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/// <param name="angle">angle</param>
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/// <param name="radius">radius</param>
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/// <param name="origin">origin</param>
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/// <returns>返回值</returns>
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private Point GetPointByAngle(float angle, float radius, PointF origin)
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{
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float y = origin.Y + (float)Math.Sin(Math.PI * (angle / 180.00F)) * radius;
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float x = origin.X + (float)Math.Cos(Math.PI * (angle / 180.00F)) * radius;
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return new Point((int)x, (int)y);
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}
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#endregion
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/// <summary>
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/// 引发 <see cref="E:System.Windows.Forms.Control.Paint" /> 事件。
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/// </summary>
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/// <param name="e">包含事件数据的 <see cref="T:System.Windows.Forms.PaintEventArgs" />。</param>
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protected override void OnPaint(PaintEventArgs e)
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{
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base.OnPaint(e);
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e.Graphics.SetGDIHigh();
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Region = new Region(m_borderPath);
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if (_bitCache != null)
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e.Graphics.DrawImage(_bitCache, 0, 0);
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}
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}
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}
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