/// <summary>
/// Draws the background of the parent control giving a transparent effect
/// </summary>
/// <param name="graphics">Drawing surface</param>
/// <param name="form">Parent Container that implements <see cref="IControlBackground"/></param>
/// <param name="bounds">Bounds of the Control</param>
/// <param name="parent">Instance of the Parent Container</param>
public void DrawBackground(Graphics graphics, IControlBackground form, Rectangle bounds, Control parent)
{
if (form.BackgroundImage == null)
{
return;
}
var g = GraphicsEx.FromGraphics(graphics);
switch (form.BackgroundDrawMode)
{
case ImageDrawMode.Normal:
g.DrawImage(form.BackgroundImage, 0, 0, bounds);
break;
case ImageDrawMode.Center:
Point location = GraphicsEx.GetCenter(form.BackgroundImage.Size, parent.ClientSize);
g.DrawImage(form.BackgroundImage,
location.X,
location.Y,
new Rectangle(bounds.X,
bounds.Y,
form.BackgroundImage.Width,
form.BackgroundImage.Height));
break;
case ImageDrawMode.Stretch:
using (Image image = ImageManipulator.Stretch(form.BackgroundImage, parent.ClientSize))
g.DrawImage(image, 0, 0, bounds);
break;
default:
throw new ArgumentOutOfRangeException();
}
}
private void DrawCentered(GraphicsEx graphics)
{
Point location = GraphicsEx.GetCenter(ClientSize, Image.Size);
ImageAttributes attributes = GetImageAttributes(Image);
graphics.DrawImage(Image,
new Rectangle(location.X, location.Y, Image.Width, Image.Height),
new Rectangle(0, 0, Image.Width, Image.Height),
attributes);
}