public static void UpdateBackground(this NSView control, Brush brush)
{
if (control == null)
{
return;
}
NSView view = ShouldUseParentView(control) ? control.Superview : control;
// Clear previous background color
if (control.Layer != null && control.Layer.Name == SolidColorBrushLayer)
{
control.Layer.BackgroundColor = NSColor.Clear.CGColor;
}
// Remove previous background gradient layer if any
RemoveBackgroundLayer(view);
if (Brush.IsNullOrEmpty(brush))
{
return;
}
control.WantsLayer = true;
control.LayerContentsRedrawPolicy = NSViewLayerContentsRedrawPolicy.BeforeViewResize;
if (brush is SolidColorBrush solidColorBrush)
{
control.Layer.Name = SolidColorBrushLayer;
var backgroundColor = solidColorBrush.Color;
if (backgroundColor == Color.Default)
{
control.Layer.BackgroundColor = NSColor.Clear.CGColor;
}
else
{
control.Layer.BackgroundColor = backgroundColor.ToCGColor();
}
}
else
{
var backgroundLayer = GetBackgroundLayer(control, brush);
if (backgroundLayer != null)
{
view.InsertBackgroundLayer(backgroundLayer, 0);
}
}
}