/// <summary>
/// Returns the image of the gradient filled rounded rectangle
/// </summary>
/// <param name="rc">Desctination rectangle</param>
/// <param name="startColorValue">Starting color for gradient</param>
/// <param name="endColorValue">End color for gradient</param>
/// <param name="borderColor">The color of the border</param>
/// <param name="size">The size of the rounded corners</param>
/// <returns>Bitmap image</returns>
public static Bitmap GetGradiendRoundedRectangle(Rectangle rc, Color startColorValue, Color endColorValue, Color borderColor, Size size)
{
Bitmap outputImage = new Bitmap(rc.Width, rc.Height);
// Create temporary graphics
Graphics gx = Graphics.FromImage(outputImage);
GradientFill.Fill(
gx,
rc,
startColorValue,
endColorValue,
FillDirection.TopToBottom);
Rectangle roundedRect = rc;
roundedRect.Width--;
roundedRect.Height--;
Bitmap borderImage = ImposeRoundedRectangle(roundedRect, borderColor, size);
ImageAttributes attrib = new ImageAttributes();
attrib.SetColorKey(Color.Green, Color.Green);
gx.DrawImage(borderImage, rc, 0, 0, borderImage.Width, borderImage.Height, GraphicsUnit.Pixel, attrib);
// Clean up
attrib.Dispose();
gx.Dispose();
return(outputImage);
}
/// <summary>
/// Fills the rectagle with gradient colors
/// </summary>
/// <param name="gx">Destination graphics</param>
/// <param name="rc">Desctination rectangle</param>
/// <param name="startColorValue">Starting color for gradient</param>
/// <param name="endColorValue">End color for gradient</param>
/// <param name="fillDirection">The direction of the gradient</param>
public static void FillGradientRectangle(this Graphics gx, Rectangle rc, Color startColorValue, Color endColorValue, FillDirection fillDirection)
{
GradientFill.Fill(
gx,
rc,
startColorValue,
endColorValue,
fillDirection);
}
/// <summary>
/// Returns the rectangle filled with gradient colors
/// </summary>
/// <param name="rc">Destination rectangle</param>
/// <param name="startColorValue">Starting color for gradient</param>
/// <param name="endColorValue">End color for gradient</param>
/// <param name="fillDirection">The direction of the gradient</param>
/// <returns>Image of the rectanle</returns>
public static Bitmap GetGradientRectangle(Rectangle rc, Color startColorValue, Color endColorValue, FillDirection fillDirection)
{
Bitmap outputImage = new Bitmap(rc.Width, rc.Height);
// Create temporary graphics
Graphics gx = Graphics.FromImage(outputImage);
GradientFill.Fill(
gx,
rc,
startColorValue,
endColorValue,
fillDirection);
return(outputImage);
}
/// <summary>
/// Draws gradient filled rounded rectangle with transparency
/// </summary>
/// <param name="gx">Destination graphics</param>
/// <param name="rc">Destination rectangle</param>
/// <param name="startColorValue">Starting color for gradient</param>
/// <param name="endColorValue">End color for gradient</param>
/// <param name="borderColor">The color of the border</param>
/// <param name="size">The size of the rounded corners</param>
/// <param name="transparency">Transparency constant</param>
public static void DrawGradientRoundedRectangleAlpha(this Graphics gx, Rectangle rc, Color startColorValue, Color endColorValue, Color borderColor, Size size, byte transparency)
{
// Prepare image for gradient
Bitmap gradientImage = new Bitmap(rc.Width, rc.Height);
// Create temporary graphics
Graphics gxGradient = Graphics.FromImage(gradientImage);
// This is our rectangle
Rectangle roundedRect = new Rectangle(0, 0, rc.Width, rc.Height);
// Fill in gradient
GradientFill.Fill(
gxGradient,
roundedRect,
startColorValue,
endColorValue,
FillDirection.TopToBottom);
// Prepare the copy of the screen graphics
Bitmap tempBitmap = new Bitmap(240, 320);
Graphics tempGx = Graphics.FromImage(tempBitmap);
// Copy from the screen's graphics to the temp graphics
CopyGraphics(gx, tempGx, 240, 320);
// Draw the gradient image with transparency on the temp graphics
tempGx.DrawAlpha(gradientImage, transparency, rc.X, rc.Y);
// Cut out the transparent image
gxGradient.DrawImage(tempBitmap, new Rectangle(0, 0, rc.Width, rc.Height), rc, GraphicsUnit.Pixel);
// Prepare for imposing
roundedRect.Width--;
roundedRect.Height--;
// Impose the rounded rectangle with transparent color
Bitmap borderImage = ImposeRoundedRectangle(roundedRect, borderColor, size);
// Draw the transparent rounded rectangle
ImageAttributes attrib = new ImageAttributes();
attrib.SetColorKey(Color.Green, Color.Green);
gxGradient.DrawImage(borderImage, new Rectangle(0, 0, rc.Width, rc.Height), 0, 0, borderImage.Width, borderImage.Height, GraphicsUnit.Pixel, attrib);
// OK... now are ready to draw the final image on the original graphics
gx.DrawImageTransparent(gradientImage, rc);
// Clean up
attrib.Dispose();
tempGx.Dispose();
tempBitmap.Dispose();
gradientImage.Dispose();
gxGradient.Dispose();
}
