void UpdateAppearance(ShellAppearance appearance)
{
var tabBarBackgroundColor = ShellRenderer.DefaultBackgroundColor;
var tabBarForegroundColor = ShellRenderer.DefaultForegroundColor;
var titleColor = ShellRenderer.DefaultTitleColor;
if (appearance != null)
{
var a = (IShellAppearanceElement)appearance;
tabBarBackgroundColor = a.EffectiveTabBarBackgroundColor.ToWindowsColor();
tabBarForegroundColor = a.EffectiveTabBarForegroundColor.ToWindowsColor();
if (!appearance.TitleColor.IsDefault())
{
titleColor = appearance.TitleColor.ToWindowsColor();
}
}
_BottomBarArea.Background = _HeaderArea.Background =
new UwpSolidColorBrush(tabBarBackgroundColor);
_Title.Foreground = new UwpSolidColorBrush(titleColor);
var tabbarForeground = new UwpSolidColorBrush(tabBarForegroundColor);
foreach (var button in _BottomBar.Children.OfType <AppBarButton>())
{
button.Foreground = tabbarForeground;
}
if (SectionRenderer is IAppearanceObserver iao)
{
iao.OnAppearanceChanged(appearance);
}
}
protected override void UpdateBackgroundColor()
{
base.UpdateBackgroundColor();
if (GetValue(BackgroundProperty) == null && Children.Count == 0)
{
// Forces the layout to take up actual space if it's otherwise empty
Background = new WSolidColorBrush(Colors.Transparent);
}
}
void MakeInputVisible(Brush?background)
{
// If we aren't input transparent, we don't need the background layer hack
RemoveBackgroundLayer();
if (background == null)
{
// We can't have a null background, because that would allow input through
// So we'll make the background color transparent (visually the same as null, but consumes input)
background = new WSolidColorBrush(UI.Colors.Transparent);
}
Background = background;
}
void UpdateAppearance(ShellAppearance appearance)
{
var tabBarBackgroundColor = ShellView.DefaultBackgroundColor;
var tabBarForegroundColor = ShellView.DefaultForegroundColor;
var titleColor = ShellView.DefaultTitleColor;
if (appearance != null)
{
var a = (IShellAppearanceElement)appearance;
if (a.EffectiveTabBarBackgroundColor != null)
{
tabBarBackgroundColor = a.EffectiveTabBarBackgroundColor.ToWindowsColor();
}
if (a.EffectiveTabBarForegroundColor != null)
{
tabBarForegroundColor = a.EffectiveTabBarForegroundColor.ToWindowsColor();
}
if (!appearance.TitleColor.IsDefault())
{
titleColor = appearance.TitleColor.ToWindowsColor();
}
}
_HeaderArea.Background = new UwpSolidColorBrush(tabBarBackgroundColor);
// Only color the bottom area if there are tabs present
if (ShellItem?.Items.Count > 1)
{
_BottomBarArea.Background =
new UwpSolidColorBrush(tabBarBackgroundColor);
}
_Title.Foreground = new UwpSolidColorBrush(titleColor);
var tabbarForeground = new UwpSolidColorBrush(tabBarForegroundColor);
foreach (var button in _BottomBar.Children.OfType <AppBarButton>())
{
button.Foreground = tabbarForeground;
}
if (SectionView is IAppearanceObserver iao)
{
iao.OnAppearanceChanged(appearance);
}
}
public object Convert(object value, Type targetType, object parameter, string language)
{
WSolidColorBrush brush = null;
var element = value as FrameworkElement;
if (element != null)
{
while (brush == null && element != null)
{
DependencyProperty property = GetBackgroundProperty(element);
if (property != null)
{
value = element.GetValue(property);
brush = value as WSolidColorBrush;
if (brush != null && brush.Color == Colors.Transparent)
{
brush = null;
}
}
element = VisualTreeHelper.GetParent(element) as FrameworkElement;
}
}
brush = value as WSolidColorBrush;
if (brush != null)
{
Maui.Graphics.Color color = brush.ToFormsColor();
double delta = Shift;
if (color.GetLuminosity() > .6)
{
delta = -Shift;
}
color = color.AddLuminosity((float)delta);
return(new WSolidColorBrush(color.ToWindowsColor()));
}
return(null);
}
