/// <summary>
/// Applies a theme to the navigation bar. Note, this does not update the theme for the title.
/// </summary>
/// <param name="navigationBar">A navigation bar to apply the theme to.</param>
/// <param name="theme">The theme to apply to the navigation bar.</param>
public static void ApplyTheme(this UINavigationBar navigationBar, NavigationBarTheme theme)
{
UIColor backgroundColor = theme.BackgroundColor.ToUIColor();
navigationBar.BackgroundColor = backgroundColor;
navigationBar.BarTintColor = backgroundColor;
navigationBar.Translucent = theme.BackgroundColor.Alpha == 0;
navigationBar.TintColor = theme.ItemColor.ToUIColor();
if (theme.ShadowColor.Alpha > 0)
{
nfloat height = 1.0f / UIScreen.MainScreen.Scale;
UIView shadow = new UIView(new CGRect(0, navigationBar.Frame.Height, navigationBar.Frame.Width, height));
shadow.BackgroundColor = theme.ShadowColor.ToUIColor();
navigationBar.ShadowImage = null;
navigationBar.AddSubview(shadow);
}
else
{
navigationBar.ShadowImage = new UIImage();
}
UIStringAttributes attributes = new UIStringAttributes();
attributes.Font = ViewThemeExtensions.GetFont(theme.FontName, ViewFontSizes.LargeFontSize, FontStyle.Bold);
attributes.ForegroundColor = theme.FontColor.ToUIColor();
navigationBar.TitleTextAttributes = attributes;
}
/// <summary>
/// Applies a theme to the specified text view.
/// </summary>
/// <param name="field">A text view to apply the theme to.</param>
/// <param name="theme">The theme to apply to the text view.</param>
/// <param name="fontSize">The size of the font for the text field.</param>
public static void ApplyTheme(this UITextView field, TextFieldTheme theme, int fontSize)
{
field.BackgroundColor = theme.BackgroundColor.ToUIColor();
field.TintColor = theme.CursorColor.ToUIColor();
field.Font = ViewThemeExtensions.GetFont(theme.FontName, fontSize);
field.TextColor = theme.FontColor.ToUIColor();
}
/// <summary>
/// Applies a theme to the specified button.
/// </summary>
/// <param name="button">A button to apply the theme to.</param>
/// <param name="theme">The theme to apply to the button.</param>
/// <param name="image">An image for the button.</param>
/// <param name="imageInsets">Optional inset or outset margins for the rectangle around the button’s image.</param>
/// <param name="imageLeft">Optional flag to identify if the image for the button should be shown to the left of the text, otherwise to the right; the default is true.</param>
/// <param name="fontSize">The size of the font for the button text.</param>
public static void ApplyTheme(
this UIButton button,
ButtonTheme theme,
UIImage image,
UIEdgeInsets imageInsets,
bool imageLeft,
int fontSize)
{
if (theme.BorderColor.Alpha > 0)
{
button.Layer.BorderColor =
button.Enabled
? theme.BorderColor.ToCGColor()
: theme.DisabledColor.ToCGColor();
button.Layer.BorderWidth = Constants.ButtonBorderWidth;
button.Layer.CornerRadius = button.Frame.Height / 2;
}
if (image != null)
{
UIImage updatedImage = image;
if (theme.ImageTintColor.Alpha > 0)
{
if (updatedImage.RenderingMode != UIImageRenderingMode.AlwaysTemplate)
{
updatedImage = updatedImage.ImageWithRenderingMode(UIImageRenderingMode.AlwaysTemplate);
}
button.TintColor = theme.ImageTintColor.ToUIColor();
}
button.SetImage(updatedImage, UIControlState.Normal);
button.ImageEdgeInsets = imageInsets;
if (!imageLeft)
{
button.Transform = CGAffineTransform.MakeScale(-1.0f, 1.0f);
button.TitleLabel.Transform = CGAffineTransform.MakeScale(-1.0f, 1.0f);
button.ImageView.Transform = CGAffineTransform.MakeScale(-1.0f, 1.0f);
}
}
button.BackgroundColor =
button.Enabled || theme.BackgroundColor.Alpha == 0
? theme.BackgroundColor.ToUIColor()
: theme.DisabledColor.ToUIColor();
button.SetTitleColor(theme.FontColor.ToUIColor(), UIControlState.Normal);
button.SetTitleColor(theme.DisabledColor.ToUIColor(), UIControlState.Disabled);
button.Font = ViewThemeExtensions.GetFont(theme.FontName, fontSize);
}
/// <summary>
/// Applies a theme to the specified text field.
/// </summary>
/// <param name="field">A text field to apply the theme to.</param>
/// <param name="theme">The theme to apply to the text field.</param>
/// <param name="fontSize">The size of the font for the text field.</param>
public static void ApplyTheme(this UITextField field, TextFieldTheme theme, int fontSize)
{
field.BackgroundColor = theme.BackgroundColor.ToUIColor();
field.TintColor = theme.CursorColor.ToUIColor();
if (field.BorderStyle != UITextBorderStyle.None)
{
// apply the background color to the boarder to give the field a 'thicker' appearance
field.Layer.BorderColor = theme.BackgroundColor.ToCGColor();
field.Layer.BorderWidth = Constants.TextFieldBorderWidth;
}
field.Font = ViewThemeExtensions.GetFont(theme.FontName, fontSize);
field.TextColor = theme.FontColor.ToUIColor();
if (!string.IsNullOrWhiteSpace(field.Placeholder))
{
field.AttributedPlaceholder = new NSAttributedString(field.Placeholder, null, theme.PlaceHolderColor.ToUIColor());
}
}
/// <summary>
/// Applies a theme to the specified label.
/// </summary>
/// <param name="label">A label to apply the theme to.</param>
/// <param name="theme">The theme to apply to the label.</param>
/// <param name="fontSize">The size of the font for the label.</param>
public static void ApplyTheme(this UILabel label, LabelTheme theme, int fontSize)
{
label.BackgroundColor = theme.BackgroundColor.ToUIColor();
label.TextColor = theme.FontColor.ToUIColor();
label.Font = ViewThemeExtensions.GetFont(theme.FontName, fontSize).ApplyStyle(theme.FontStyle);
}