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#if NETFX || NETCORE
using System;using System.Drawing;using System.Windows.Forms;using System.Runtime.InteropServices;using System.Drawing.Drawing2D;
namespace Apewer.Surface{
internal class BlockShadow : BaseForm {
#region definition
private BlockForm _parent;
#endregion
#region this
public void Constructor() { this.Optimize();
_parent.TopMost = TopMost = _parent.TopMost; _parent.BringToFront();
this.Location = new Point(_parent.Location.X - 100, _parent.Location.Y - 100); this.Width = _parent.Width + 200; this.Height = _parent.Height + 200;
this.TopMost = _parent.TopMost; this.ShowInTaskbar = false; this.FormBorderStyle = FormBorderStyle.None; this.Icon = _parent.Icon; this.ShowIcon = _parent.ShowIcon; this.Text = _parent.Text;
FormsUtility.UpdateShadow(this, ShadowImage(Width, Height)); FormsUtility.MousePenetration(this);
this.Paint += Event_This_Paint;
_parent.LocationChanged += new EventHandler(Main_LocationChanged); _parent.SizeChanged += new EventHandler(Main_SizeChanged); _parent.VisibleChanged += new EventHandler(Main_VisibleChanged); _parent.ResizeBegin += Event_Form_ResizeBegin; _parent.ResizeEnd += Event_Form_Resizeend; }
public BlockShadow(BlockForm graceForm) { _parent = graceForm; Constructor(); }
#endregion
#region base
protected override CreateParams CreateParams { get { CreateParams cParms = base.CreateParams; cParms.ExStyle |= 0x00080000; // WS_EX_LAYERED
return cParms; } }
#endregion
#region event
private void Event_This_Paint(object sender, PaintEventArgs e) { }
private void Event_Form_Resizeend(object sender, EventArgs e) { //this.Visible = true;
}
private void Event_Form_ResizeBegin(object sender, EventArgs e) { //this.Visible = false;
}
private void Main_LocationChanged(object sender, EventArgs e) { Location = new Point(_parent.Left - 100, _parent.Top - 100); }
private void Main_SizeChanged(object sender, EventArgs e) { this.Size = new Size(_parent.Width + 200, _parent.Height + 200); FormsUtility.UpdateShadow(this, ShadowImage(Width, Height)); }
private void Main_VisibleChanged(object sender, EventArgs e) { this.Visible = _parent.Visible; }
#endregion
#region shadow
private Bitmap ShadowImage(int width, int height, bool focus = true) { return ShadowImage_1(width, height, focus); }
private Bitmap ShadowImage_2(int width, int height, bool focus = true) { var bitmap = new Bitmap(width, height, System.Drawing.Imaging.PixelFormat.Format32bppArgb); var g = Graphics.FromImage(bitmap); g.Clear(Color.FromArgb(0, 0, 0, 0)); g.SmoothingMode = SmoothingMode.HighQuality; g.CompositingMode = CompositingMode.SourceCopy;
int w = _parent.Width + 200; int h = _parent.Height + 200; if ((w > Screen.PrimaryScreen.Bounds.Width) || (h > Screen.PrimaryScreen.Bounds.Height)) { //using (var vp = new Pen(bordercolor)) vg.DrawRectangle(vp, 100, 100, Width - 200, Height - 200);
g.Dispose(); return bitmap; }
for (int i = 0; i < 100; i++) { var rect = new Rectangle(i, i, w - (i * 2), h - (i * 2)); var path = FormsUtility.CreatePath(rect, 99 - i); var alpha = GetAlpha(99 - i); var pen = new Pen(Color.FromArgb(alpha, 0, 0, 0)); // var vbrush = new SolidBrush(Color.FromArgb(valpha, 0, 0, 0));
g.DrawRectangle(pen, rect); //vg.DrawPath(vpen, vpath);
//vg.FillPath(vbrush, vpath);
//vbrush.Dispose();
pen.Dispose(); path.Dispose(); }
//for (int i = 0; i < 100; i++)
//{
// var vrect = new Rectangle(i, i, 100 - i, 100 - i);
// var valpha = getalpha(99 - i);
// using (var vbrush = new SolidBrush(Color.FromArgb(valpha, 0, 0, 0)))
// {
// vg.FillPie(vbrush, vrect, 180, 90);
// vg.FillPie(vbrush, new Rectangle(0,0,100,100));
// }
//}
//using (var vbrush = new SolidBrush(Color.Transparent))
//{
// vg.FillRectangle(vbrush, new Rectangle(100, 100, vwidth - 200, vheight - 200));
//}
//using (var vbrush = new SolidBrush(Color.Transparent))
//{
// vg.FillRectangle(vbrush, new Rectangle(100, 100, vwidth - 200, vheight - 200));
//}
g.Dispose(); return bitmap; }
private Bitmap ShadowImage_1(int width, int height, bool focus = true) { var bitmap = new Bitmap(width, height, System.Drawing.Imaging.PixelFormat.Format32bppArgb); var g = Graphics.FromImage(bitmap); g.Clear(Color.FromArgb(0, 0, 0, 0));
int w = _parent.Width + 200; int h = _parent.Height + 200; if ((w > Screen.PrimaryScreen.Bounds.Width) || (h > Screen.PrimaryScreen.Bounds.Height)) { //using (var vp = new Pen(bordercolor)) vg.DrawRectangle(vp, 100, 100, Width - 200, Height - 200);
g.Dispose(); return bitmap; }
// 边角距离补偿
int cornerOffset = 2;
// 上
for (int y = 0; y <= 99; y++) { double length = 100 - y; using (var pen = new Pen(Color.FromArgb(GetAlpha(length), 0, 0, 0))) g.DrawLine(pen, 100, y, width - 101, y); }
// 下
for (int y = height - 100; y <= height - 2; y++) { double length = y - (height - 101); using (var pen = new Pen(Color.FromArgb(GetAlpha(length), 0, 0, 0))) g.DrawLine(pen, 100, y, width - 101, y); }
// 左
for (int x = 0; x <= 99; x++) { double length = 100 - x; using (var pen = new Pen(Color.FromArgb(GetAlpha(length), 0, 0, 0))) g.DrawLine(pen, x, 100, x, height - 101); }
// 右
for (int x = width - 100; x <= width - 2; x++) { double length = x - (width - 101); using (var pen = new Pen(Color.FromArgb(GetAlpha(length), 0, 0, 0))) g.DrawLine(pen, x, 100, x, height - 101); }
// 左上
for (int x = 0; x <= 99; x++) { for (int y = 0; y <= 99; y++) { double vx = 100 - x; double vy = 100 - y; double vl = Math.Sqrt((vx * vx) + (vy * vy)) + cornerOffset; bitmap.SetPixel(x, y, Color.FromArgb(GetAlpha(vl), 0, 0, 0)); } }
// 右上
for (int x = width - 100; x <= width - 1; x++) { for (int y = 0; y <= 99; y++) { double vx = 100 - (width - x); double vy = 100 - y; double vl = Math.Sqrt((vx * vx) + (vy * vy)) + cornerOffset; bitmap.SetPixel(x, y, Color.FromArgb(GetAlpha(vl), 0, 0, 0)); } }
// 左下
for (int x = 0; x <= 99; x++) { for (int y = height - 100; y <= height - 1; y++) { double vx = 100 - x; double vy = 100 - (height - y); double vl = Math.Sqrt((vx * vx) + (vy * vy)) + cornerOffset; bitmap.SetPixel(x, y, Color.FromArgb(GetAlpha(vl), 0, 0, 0)); } }
// 右下
for (int x = width - 100; x <= width - 1; x++) { for (int y = height - 100; y <= height - 1; y++) { double vx = 100 - (width - x); double vy = 100 - (height - y); double vl = Math.Sqrt((vx * vx) + (vy * vy)) + cornerOffset; bitmap.SetPixel(x, y, Color.FromArgb(GetAlpha(vl), 0, 0, 0)); } }
g.Dispose(); return bitmap; }
private static int GetAlpha(double length, bool focus = true) { // 返回值。
double alpha = 0;
// 参数。
if (length < 0) length = 0; if (length > 100) length = 100;
// 常数。
double alphaMax = 0; // 0 <= x <=255
// 过程变量。
double x = 0, y = 0, xMax = 0, yMax = 0, lMax = 0, tanMax = 0, ratio = 0; ;
// 选择方法。
int method = 1; // flat from 4
switch (method) {
case 0: // 穷举
ratio = 0.5; int vlint = (int)length; switch (vlint) { case 0: return 40; case 1: return 39; case 2: return 38; case 3: return 37; case 4: return 36; case 5: return 36; case 6: return 35; case 7: return 34; case 8: return 33; case 9: return 33; case 10: return 32; case 11: return 31; case 12: return 30; case 13: return 30; case 14: return 29; case 15: return 28; case 16: return 28; case 17: return 27; case 18: return 26; case 19: return 26; case 20: return 25; case 21: return 24; case 22: return 24; case 23: return 23; case 24: return 23; case 25: return 22; case 26: return 21; case 27: return 21; case 28: return 20; case 29: return 20; case 30: return 19; case 31: return 19; case 32: return 18; case 33: return 17; case 34: return 17; case 35: return 16; case 36: return 16; case 37: return 15; case 38: return 15; case 39: return 14; case 40: return 14; case 41: return 13; case 42: return 13; case 43: return 12; case 44: return 12; case 45: return 12; case 46: return 11; case 47: return 11; case 48: return 10; case 49: return 10; case 50: return 10; case 51: return 9; case 52: return 9; case 53: return 8; case 54: return 8; case 55: return 8; case 56: return 7; case 57: return 7; case 58: return 7; case 59: return 6; case 60: return 6; case 61: return 6; case 62: return 5; case 63: return 5; case 64: return 5; case 65: return 4; case 66: return 4; case 67: return 4; case 68: return 4; case 69: return 3; case 70: return 3; case 71: return 3; case 72: return 3; case 73: return 2; case 74: return 2; case 75: return 2; case 76: return 2; case 77: return 2; case 78: return 1; case 79: return 1; case 80: return 1; case 81: return 1; case 82: return 1; case 83: return 1; case 84: return 1; case 85: return 0; case 86: return 0; case 87: return 0; case 88: return 0; case 89: return 0; case 90: return 0; case 91: return 0; case 92: return 0; case 93: return 0; case 94: return 0; case 95: return 0; case 96: return 0; case 97: return 0; case 98: return 0; case 99: return 0; case 100: return 0; } break;
case 1: // 正比例
ratio = 0.2; alpha = (100 - length) * ratio; break;
case 2: // 正切函数
alphaMax = 55; tanMax = 0.45; // 0 < x < 0.5
alpha = (Math.Tan(Math.PI * tanMax * ((100 - length) / 100)) / Math.Tan(Math.PI * tanMax)) * alphaMax; break;
case 3: // 正弦函数
lMax = 40; if (length <= lMax) { y = (lMax - length) * (lMax - length); alphaMax = 30; xMax = Math.PI / 2; x = ((lMax - length) / lMax) * xMax; if (x < 0) x = 0; if (x > Math.PI / 2) x = Math.PI / 2; alpha = (Math.Sin(Math.PI * 1.5 + x) + 1) * alphaMax; } else alpha = 0; break;
case 4: // 平方函数
lMax = 100; if (length <= lMax) { alphaMax = 40; y = (lMax - length) * (lMax - length); alpha = (y / (lMax * lMax)) * alphaMax; } else alpha = 0; break;
case 5: // 幂函数
lMax = 40; if (length <= lMax) { alphaMax = 1; ratio = 1.1; x = lMax - length; y = Math.Pow(ratio, x); yMax = Math.Pow(ratio, lMax); alpha = (y / yMax) * alphaMax; } else alpha = 0; break;
case 6: if (length <= 40) alpha = 40 - length; else alpha = 0; break; } if (alpha < 0) alpha = 0; if (alpha > 255) alpha = 255; return (int)alpha; }
#endregion
}
}
#endif
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