C#自繪多狀態按鈕

客官°小女子只卖身不卖艺 2022-08-25 15:49 135阅读 0赞

C\#自繪多狀態按鈕

protected override void OnPaintBackground(PaintEventArgs pea)  
\{  
Graphics grfx = pea.Graphics;  
grfx.PageUnit = GraphicsUnit.Pixel;  
  
Graphics offScreenGraphics;  
Bitmap offscreenBitmap;  
  
offscreenBitmap = new Bitmap(BackgroundBitmap.Width, BackgroundBitmap.Height);  
offScreenGraphics = Graphics.FromImage(offscreenBitmap);  
  
if (BackgroundBitmap != null)  
\{  
offScreenGraphics.DrawImage(BackgroundBitmap, 0, 0, BackgroundBitmap.Width, BackgroundBitmap.Height);  
\}  
  
DrawCloseButton(offScreenGraphics);  
DrawText(offScreenGraphics);

grfx.DrawImage(offscreenBitmap, 0, 0);  
\}  
/// <summary>  
/// Sets the 3-State Close Button bitmap, its transparency color and its coordinates  
/// </summary>  
/// <param name="strFilename">Path of the 3-state Close button Bitmap on the disk (width must a multiple of 3)</param>  
/// <param name="transparencyColor">Color of the Bitmap which won't be visible</param>  
/// <param name="position">Location of the close button on the popup</param>  
/// <returns>Nothing</returns>  
public void SetCloseBitmap(string strFilename, Color transparencyColor, Point position)  
\{  
CloseBitmap = new Bitmap(strFilename);  
CloseBitmap.MakeTransparent(transparencyColor);  
CloseBitmapSize = new Size(CloseBitmap.Width/3, CloseBitmap.Height);  
CloseBitmapLocation = position;  
\}

/// <summary>  
/// Sets the 3-State Close Button bitmap, its transparency color and its coordinates  
/// </summary>  
/// <param name="image">Image/Bitmap object which represents the 3-state Close button Bitmap (width must be a multiple of 3)</param>  
/// <param name="transparencyColor">Color of the Bitmap which won't be visible</param>  
/// /// <param name="position">Location of the close button on the popup</param>  
/// <returns>Nothing</returns>  
public void SetCloseBitmap(Image image, Color transparencyColor, Point position)  
\{  
CloseBitmap = new Bitmap(image);  
CloseBitmap.MakeTransparent(transparencyColor);  
CloseBitmapSize = new Size(CloseBitmap.Width/3, CloseBitmap.Height);  
CloseBitmapLocation = position;  
\}

protected void DrawCloseButton(Graphics grfx)  
\{  
if (CloseBitmap != null)  
\{  
Rectangle rectDest = new Rectangle(CloseBitmapLocation, CloseBitmapSize);  
Rectangle rectSrc;

if (bIsMouseOverClose)  
\{  
if (bIsMouseDown)  
rectSrc = new Rectangle(new Point(CloseBitmapSize.Width\*2, 0), CloseBitmapSize);  
else  
rectSrc = new Rectangle(new Point(CloseBitmapSize.Width, 0), CloseBitmapSize);  
\}  
else  
rectSrc = new Rectangle(new Point(0, 0), CloseBitmapSize);

grfx.DrawImage(CloseBitmap, rectDest, rectSrc, GraphicsUnit.Pixel);  
\}  
\}