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using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.Windows.Forms;
namespace WeifenLuo.WinFormsUI.Docking
{
public static class DrawHelper
{
public static Point RtlTransform(Control control, Point point)
{
if (control.RightToLeft != RightToLeft.Yes)
return point;
else
return new Point(control.Right - point.X, point.Y);
}
public static Rectangle RtlTransform(Control control, Rectangle rectangle)
{
if (control.RightToLeft != RightToLeft.Yes)
return rectangle;
else
return new Rectangle(control.ClientRectangle.Right - rectangle.Right, rectangle.Y, rectangle.Width, rectangle.Height);
}
public static GraphicsPath GetRoundedCornerTab(GraphicsPath graphicsPath, Rectangle rect, bool upCorner)
{
if (graphicsPath == null)
graphicsPath = new GraphicsPath();
else
graphicsPath.Reset();
int curveSize = 6;
if (upCorner)
{
graphicsPath.AddLine(rect.Left, rect.Bottom, rect.Left, rect.Top + curveSize / 2);
graphicsPath.AddArc(new Rectangle(rect.Left, rect.Top, curveSize, curveSize), 180, 90);
graphicsPath.AddLine(rect.Left + curveSize / 2, rect.Top, rect.Right - curveSize / 2, rect.Top);
graphicsPath.AddArc(new Rectangle(rect.Right - curveSize, rect.Top, curveSize, curveSize), -90, 90);
graphicsPath.AddLine(rect.Right, rect.Top + curveSize / 2, rect.Right, rect.Bottom);
}
else
{
graphicsPath.AddLine(rect.Right, rect.Top, rect.Right, rect.Bottom - curveSize / 2);
graphicsPath.AddArc(new Rectangle(rect.Right - curveSize, rect.Bottom - curveSize, curveSize, curveSize), 0, 90);
graphicsPath.AddLine(rect.Right - curveSize / 2, rect.Bottom, rect.Left + curveSize / 2, rect.Bottom);
graphicsPath.AddArc(new Rectangle(rect.Left, rect.Bottom - curveSize, curveSize, curveSize), 90, 90);
graphicsPath.AddLine(rect.Left, rect.Bottom - curveSize / 2, rect.Left, rect.Top);
}
return graphicsPath;
}
public static GraphicsPath CalculateGraphicsPathFromBitmap(Bitmap bitmap)
{
return CalculateGraphicsPathFromBitmap(bitmap, Color.Empty);
}
// From http://edu.cnzz.cn/show_3281.html
public static GraphicsPath CalculateGraphicsPathFromBitmap(Bitmap bitmap, Color colorTransparent)
{
GraphicsPath graphicsPath = new GraphicsPath();
if (colorTransparent == Color.Empty)
colorTransparent = bitmap.GetPixel(0, 0);
for(int row = 0; row < bitmap.Height; row ++)
{
int colOpaquePixel = 0;
for(int col = 0; col < bitmap.Width; col ++)
{
if(bitmap.GetPixel(col, row) != colorTransparent)
{
colOpaquePixel = col;
int colNext = col;
for(colNext = colOpaquePixel; colNext < bitmap.Width; colNext ++)
if(bitmap.GetPixel(colNext, row) == colorTransparent)
break;
graphicsPath.AddRectangle(new Rectangle(colOpaquePixel, row, colNext - colOpaquePixel, 1));
col = colNext;
}
}
}
return graphicsPath;
}
public static int Balance(int length, int margin, int input, int lower, int upper)
{
return Max(Min(input, upper - length - margin), lower + margin);
}
private static int Min(int one, int other)
{
return one > other ? other : one;
}
private static int Max(int one, int other)
{
return one < other ? other : one;
}
}
}
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