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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public class UControl : Control
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{
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public UControl()
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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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GraphicsPath m_borderPath = new GraphicsPath();
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#region 私有属性
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private Bitmap samplingImag = null;
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private Color transparent = Color.White;
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private int alpha = 50;
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private int colorThreshold = 10;
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private Bitmap _bitCache;
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#endregion
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#region 公有属性
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[Browsable(true), Category("Wen"), 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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[Browsable(true), Category("Wen"), Description("透明色"), 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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[Browsable(true), Category("Wen"), 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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[Browsable(true), Category("Wen"), 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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#endregion
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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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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);
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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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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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private bool IsLikeColor(Color color1, Color color2)
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{
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double 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
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/// <summary>
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/// 功能描述:根据角度得到坐标
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/// </summary>
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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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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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