public static void DrawBackgroundImage(Graphics g, Image backgroundImage, Color backColor, ImageLayout backgroundImageLayout, Rectangle bounds, Rectangle clipRect, Point scrollOffset, RightToLeft rightToLeft)
{
if (g == null)
{
throw new ArgumentNullException(nameof(g));
}
if (backgroundImageLayout == ImageLayout.Tile)
{
using (TextureBrush textureBrush = new TextureBrush(backgroundImage, WrapMode.Tile)) {
if (scrollOffset != Point.Empty)
{
Matrix transform = textureBrush.Transform;
transform.Translate((float)scrollOffset.X, (float)scrollOffset.Y);
textureBrush.Transform = transform;
}
g.FillRectangle(textureBrush, clipRect);
return;
}
}
Rectangle rectangle = ControlPaintWrapper.CalculateBackgroundImageRectangle(bounds, backgroundImage, backgroundImageLayout);
if (rightToLeft == RightToLeft.Yes && backgroundImageLayout == ImageLayout.None)
{
rectangle.X += clipRect.Width - rectangle.Width;
}
using (SolidBrush solidBrush = new SolidBrush(backColor)) {
g.FillRectangle(solidBrush, clipRect);
}
if (!clipRect.Contains(rectangle))
{
if (backgroundImageLayout == ImageLayout.Stretch || backgroundImageLayout == ImageLayout.Zoom)
{
rectangle.Intersect(clipRect);
g.DrawImage(backgroundImage, rectangle);
return;
}
if (backgroundImageLayout == ImageLayout.None)
{
rectangle.Offset(clipRect.Location);
Rectangle destRect = rectangle;
destRect.Intersect(clipRect);
Rectangle rectangle2 = new Rectangle(Point.Empty, destRect.Size);
g.DrawImage(backgroundImage, destRect, rectangle2.X, rectangle2.Y, rectangle2.Width, rectangle2.Height, GraphicsUnit.Pixel);
return;
}
Rectangle destRect2 = rectangle;
destRect2.Intersect(clipRect);
Rectangle rectangle3 = new Rectangle(new Point(destRect2.X - rectangle.X, destRect2.Y - rectangle.Y), destRect2.Size);
g.DrawImage(backgroundImage, destRect2, rectangle3.X, rectangle3.Y, rectangle3.Width, rectangle3.Height, GraphicsUnit.Pixel);
return;
}
else
{
ImageAttributes imageAttributes = new ImageAttributes();
imageAttributes.SetWrapMode(WrapMode.TileFlipXY);
g.DrawImage(backgroundImage, rectangle, 0, 0, backgroundImage.Width, backgroundImage.Height, GraphicsUnit.Pixel, imageAttributes);
imageAttributes.Dispose();
}
}
public static StringFormat StringFormatForAlignment(System.Drawing.ContentAlignment align)
{
return(new StringFormat
{
Alignment = ControlPaintWrapper.TranslateAlignment(align),
LineAlignment = ControlPaintWrapper.TranslateLineAlignment(align)
});
}
public static StringFormat CreateStringFormat(Control ctl, ContentAlignment textAlign, bool showEllipsis)
{
StringFormat stringFormat = ControlPaintWrapper.StringFormatForAlignment(textAlign);
if (ctl.RightToLeft == RightToLeft.Yes)
{
stringFormat.FormatFlags |= StringFormatFlags.DirectionRightToLeft;
}
if (showEllipsis)
{
stringFormat.Trimming = StringTrimming.EllipsisCharacter;
stringFormat.FormatFlags |= StringFormatFlags.LineLimit;
}
if (ctl.AutoSize)
{
stringFormat.FormatFlags |= StringFormatFlags.MeasureTrailingSpaces;
}
return(stringFormat);
}