protected virtual void OnDrawIcon(DrawIconEventArgs args)
{
TreeViewAdv tree = args.Node.Tree;
if (tree != null)
{
tree.FireDrawControl(args);
}
if (DrawIcon != null)
{
DrawIcon(this, args);
}
}
public override void Draw(TreeNodeAdv node, DrawContext context)
{
Image image = GetIcon(node);
if (image != null)
{
Rectangle r = GetBounds(node, context);
if ( image.Width > 0 && image.Height > 0 )
{
float factor = 1.0f;
switch (_scaleMode)
{
case ImageScaleMode.Fit:
factor = -1.0f;
break;
case ImageScaleMode.ScaleDown:
factor = Math.Min((float)r.Width / (float)image.Width, (float)r.Height / (float)image.Height);
factor = Math.Min(factor, 1.0f);
break;
case ImageScaleMode.ScaleUp:
factor = Math.Min((float)r.Width / (float)image.Width, (float)r.Height / (float)image.Height);
factor = Math.Max(factor, 1.0f);
break;
case ImageScaleMode.AlwaysScale:
float fx = (float)r.Width / (float)image.Width;
float fy = (float)r.Height / (float)image.Height;
if (Math.Min(fx, fy) < 1) factor = Math.Min(fx, fy);
else if (Math.Max(fx, fy) > 1) factor = Math.Max(fx, fy);
else factor = 1.0f;
break;
default:
case ImageScaleMode.Clip:
factor = 1.0f;
break;
}
if (DrawIconMustBeFired(node))
{
DrawIconEventArgs iconDrawArgs = new DrawIconEventArgs(node, this, context);
OnDrawIcon(iconDrawArgs);
if (iconDrawArgs.IconColorMatrix != null)
{
ImageAttributes attrib = new ImageAttributes();
attrib.SetColorMatrix(iconDrawArgs.IconColorMatrix);
Rectangle destRect;
if (factor < 0.0f)
destRect = r;
else
destRect = new Rectangle(r.X, r.Y, (int)(image.Width * factor), (int)(image.Height * factor));
context.Graphics.DrawImage(image, destRect, 0, 0, image.Width, image.Height, GraphicsUnit.Pixel, attrib);
}
else
{
if (factor < 0.0f)
context.Graphics.DrawImage(image, r);
else if (factor == 1.0f)
context.Graphics.DrawImage(image, r.X, r.Y, image.Width, image.Height);
else
context.Graphics.DrawImage(image, r.X, r.Y, image.Width * factor, image.Height * factor);
}
}
else
{
if (factor < 0.0f)
context.Graphics.DrawImage(image, r);
else if (factor == 1.0f)
context.Graphics.DrawImage(image, r.X, r.Y, image.Width, image.Height);
else
context.Graphics.DrawImage(image, r.X, r.Y, image.Width * factor, image.Height * factor);
}
}
}
}
protected virtual void OnDrawIcon(DrawIconEventArgs args)
{
TreeViewAdv tree = args.Node.Tree;
if (tree != null)
tree.FireDrawControl(args);
if (DrawIcon != null)
DrawIcon(this, args);
}
public override void Draw(TreeNodeAdv node, DrawContext context)
{
Image image = GetIcon(node);
if (image != null)
{
Rectangle r = GetBounds(node, context);
if (image.Width > 0 && image.Height > 0)
{
float factor = 1.0f;
switch (_scaleMode)
{
case ImageScaleMode.Fit:
factor = -1.0f;
break;
case ImageScaleMode.ScaleDown:
factor = Math.Min((float)r.Width / (float)image.Width, (float)r.Height / (float)image.Height);
factor = Math.Min(factor, 1.0f);
break;
case ImageScaleMode.ScaleUp:
factor = Math.Min((float)r.Width / (float)image.Width, (float)r.Height / (float)image.Height);
factor = Math.Max(factor, 1.0f);
break;
case ImageScaleMode.AlwaysScale:
float fx = (float)r.Width / (float)image.Width;
float fy = (float)r.Height / (float)image.Height;
if (Math.Min(fx, fy) < 1)
{
factor = Math.Min(fx, fy);
}
else if (Math.Max(fx, fy) > 1)
{
factor = Math.Max(fx, fy);
}
else
{
factor = 1.0f;
}
break;
default:
case ImageScaleMode.Clip:
factor = 1.0f;
break;
}
if (DrawIconMustBeFired(node))
{
DrawIconEventArgs iconDrawArgs = new DrawIconEventArgs(node, this, context);
OnDrawIcon(iconDrawArgs);
if (iconDrawArgs.IconColorMatrix != null)
{
ImageAttributes attrib = new ImageAttributes();
attrib.SetColorMatrix(iconDrawArgs.IconColorMatrix);
Rectangle destRect;
if (factor < 0.0f)
{
destRect = r;
}
else
{
destRect = new Rectangle(r.X, r.Y, (int)(image.Width * factor), (int)(image.Height * factor));
}
context.Graphics.DrawImage(image, destRect, 0, 0, image.Width, image.Height, GraphicsUnit.Pixel, attrib);
}
else
{
if (factor < 0.0f)
{
context.Graphics.DrawImage(image, r);
}
else if (factor == 1.0f)
{
context.Graphics.DrawImage(image, r.X, r.Y, image.Width, image.Height);
}
else
{
context.Graphics.DrawImage(image, r.X, r.Y, image.Width * factor, image.Height * factor);
}
}
}
else
{
if (factor < 0.0f)
{
context.Graphics.DrawImage(image, r);
}
else if (factor == 1.0f)
{
context.Graphics.DrawImage(image, r.X, r.Y, image.Width, image.Height);
}
else
{
context.Graphics.DrawImage(image, r.X, r.Y, image.Width * factor, image.Height * factor);
}
}
}
}
}