StatusBar

Development Platform:
C#

GDIUtil.cs：Code Content
							using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using UtilityLibrary.Win32;
namespace UtilityLibrary.General
{
	/// <summary>
	/// Summary description for GDIUtil.
	/// </summary>
	public class GDIUtil
	{
		#region Constructors
		// We won't instatiate any object
		private GDIUtil()
		{
			
		}
		#endregion
		#region Methods
		static  public void Draw3DRect(Graphics g, Rectangle rc, Color topLeft, Color bottomRight)
		{
			Draw3DRect(g, rc.Left, rc.Top, rc.Width, rc.Height,  topLeft, bottomRight);
		}
		static  public void Draw3DRect(Graphics g, int x, int y, int width, int height, Color topLeft, Color bottomRight)
		{
			g.FillRectangle(new SolidBrush(topLeft), x, y, width - 1, 1);
			g.FillRectangle(new SolidBrush(topLeft), x, y, 1, height - 1);
			g.FillRectangle(new SolidBrush(bottomRight), x + width, y, -1, height);
			g.FillRectangle(new SolidBrush(bottomRight), x, y + height, width, -1);
		}
		static public void StrechBitmap(Graphics gDest, Rectangle rcDest, Bitmap bitmap)
		{
			// Draw From bitmap
			IntPtr hDCTo = gDest.GetHdc();
			WindowsAPI.SetStretchBltMode(hDCTo, StrechModeFlags.HALFTONE);
			IntPtr hDCFrom = WindowsAPI.CreateCompatibleDC(hDCTo);
					
			IntPtr hOldFromBitmap = WindowsAPI.SelectObject(hDCFrom, bitmap.GetHbitmap());
			WindowsAPI.StretchBlt(hDCTo, rcDest.Left , rcDest.Top, rcDest.Width, rcDest.Height, hDCFrom, 
				0 , 0, bitmap.Width, bitmap.Height, PatBltTypes.SRCCOPY);
                
			// Cleanup
			WindowsAPI.SelectObject(hDCFrom, hOldFromBitmap);
			gDest.ReleaseHdc(hDCTo);
		}
		static public void StrechBitmap(Graphics gDest, Rectangle rcDest, Rectangle rcSource, Bitmap bitmap)
		{
			// Draw From bitmap
			IntPtr hDCTo = gDest.GetHdc();
			WindowsAPI.SetStretchBltMode(hDCTo, StrechModeFlags.COLORONCOLOR);
			IntPtr hDCFrom = WindowsAPI.CreateCompatibleDC(hDCTo);
					
			IntPtr hOldFromBitmap = WindowsAPI.SelectObject(hDCFrom, bitmap.GetHbitmap());
			WindowsAPI.StretchBlt(hDCTo, rcDest.Left , rcDest.Top, rcDest.Width, rcDest.Height, hDCFrom, 
				rcSource.Left , rcSource.Top, rcSource.Width, rcSource.Height, PatBltTypes.SRCCOPY);
                
			// Cleanup
			WindowsAPI.SelectObject(hDCFrom, hOldFromBitmap);
			WindowsAPI.DeleteDC(hDCFrom);
			gDest.ReleaseHdc(hDCTo);
		}
		static public Bitmap GetStrechedBitmap(Graphics gDest, Rectangle rcDest, Bitmap bitmap)
		{
			// Draw To bitmap
			Bitmap newBitmap = new Bitmap(rcDest.Width, rcDest.Height);
			Graphics gBitmap = Graphics.FromImage(newBitmap); 
			IntPtr hDCTo = gBitmap.GetHdc();
			WindowsAPI.SetStretchBltMode(hDCTo, StrechModeFlags.COLORONCOLOR);
			IntPtr hDCFrom = WindowsAPI.CreateCompatibleDC(hDCTo);
									
			IntPtr hOldFromBitmap = WindowsAPI.SelectObject(hDCFrom, bitmap.GetHbitmap());
			WindowsAPI.StretchBlt(hDCTo, rcDest.Left , rcDest.Top, rcDest.Width, rcDest.Height, hDCFrom, 
				0 , 0, bitmap.Width, bitmap.Height, PatBltTypes.SRCCOPY);
                
			// Cleanup
			WindowsAPI.SelectObject(hDCFrom, hOldFromBitmap);
			WindowsAPI.DeleteDC(hDCFrom);
			gBitmap.ReleaseHdc(hDCTo);
			
			return newBitmap;
		}
		static public Bitmap GetTileBitmap(Rectangle rcDest, Bitmap bitmap)
		{
			Bitmap tiledBitmap = new Bitmap(rcDest.Width, rcDest.Height);
			using ( Graphics g = Graphics.FromImage(tiledBitmap) )
			{
				for ( int i = 0; i < tiledBitmap.Width; i += bitmap.Width )
				{
					for ( int j = 0; j < tiledBitmap.Height; j += bitmap.Height )
					{
						g.DrawImage(bitmap, new Point(i, j));					
					}
				}
			}
			return tiledBitmap;
		}
		static public void BlitBitmap(Graphics gDest, Rectangle rcDest, int xSrc, int ySrc, IntPtr handleBitmap)
		{
			// Use this function when you want faster painting of a image. Specially
			// if that image is being painting many time in a short period of time
			// --like when dragging the thumb of a scrollbar and painting an image in 
			// real time-- Having the handle of the bitmap saved somewhere avoids
			// recreating the handle every time the image is drawn as GDI+ does it 
			// every time it paints the image
			IntPtr hDCTo = gDest.GetHdc();
			IntPtr hDCSrc = WindowsAPI.CreateCompatibleDC(hDCTo);
			IntPtr hOldFromBitmap = WindowsAPI.SelectObject(hDCSrc, handleBitmap);
			WindowsAPI.BitBlt(hDCTo, rcDest.Left, rcDest.Top, rcDest.Width, rcDest.Height, hDCSrc, xSrc, ySrc, PatBltTypes.SRCCOPY);
			// Cleanup
			WindowsAPI.SelectObject(hDCSrc, hOldFromBitmap);
			WindowsAPI.DeleteDC(hDCSrc);
			gDest.ReleaseHdc(hDCTo);
		}
		static public void DrawArrowGlyph(Graphics g, Rectangle rc, ArrowGlyph arrowGlyph, Brush brush)
		{
			// Draw arrow glyph with the default 
			// size of 5 pixel wide and 3 pixel high
			DrawArrowGlyph(g, rc, 5, 3, arrowGlyph, brush);
		}
		static public void DrawArrowGlyph(Graphics g, Rectangle rc, int arrowWidth, int arrowHeight, ArrowGlyph arrowGlyph, Brush brush)
		{
			// Tip: use an odd number for the arrowWidth and 
			// arrowWidth/2+1 for the arrowHeight 
			// so that the arrow gets the same pixel number
			// on the left and on the right and get symetrically painted
			
			Point[] pts = new Point[3];
			int yMiddle = rc.Top + rc.Height/2-arrowHeight/2+1;
			int xMiddle = rc.Left + rc.Width/2;
			
			if ( arrowGlyph == ArrowGlyph.Up )
			{
				pts[0] = new Point(xMiddle, yMiddle-2);
				pts[1] = new Point(xMiddle-arrowWidth/2-1, yMiddle+arrowHeight-1);
				pts[2] = new Point(xMiddle+arrowWidth/2+1,  yMiddle+arrowHeight-1);
				
			}
			else if ( arrowGlyph == ArrowGlyph.Down )
			{
				//yMiddle -= 1;
				pts[0] = new Point(xMiddle-arrowWidth/2, yMiddle);
				pts[1] = new Point(xMiddle+arrowWidth/2+1,  yMiddle);
				pts[2] = new Point(xMiddle, yMiddle+arrowHeight);
			}
			else if ( arrowGlyph == ArrowGlyph.Left )
			{
				yMiddle = rc.Top + rc.Height/2;
				pts[0] = new Point(xMiddle-arrowHeight/2,  yMiddle);
				pts[1] = new Point(pts[0].X+arrowHeight, yMiddle-arrowWidth/2-1);
				pts[2] = new Point(pts[0].X+arrowHeight,  yMiddle+arrowWidth/2+1);
			}
			else if ( arrowGlyph == ArrowGlyph.Right )
			{
				yMiddle = rc.Top + rc.Height/2;
				pts[0] = new Point(xMiddle+arrowHeight/2+1,  yMiddle);
				pts[1] = new Point(pts[0].X-arrowHeight, yMiddle-arrowWidth/2-1);
				pts[2] = new Point(pts[0].X-arrowHeight,  yMiddle+arrowWidth/2+1);
			}
			g.FillPolygon(brush, pts);
		}
		#endregion
	}
}

						