private void SetPlaceholder(ExtendedLabel view)
{
if (view == null)
{
return;
}
if (view.FormattedText != null)
{
this.Control.AttributedText = view.FormattedText.ToAttributed(view.Font, view.TextColor);
LayoutSubviews();
return;
}
if (!string.IsNullOrEmpty(view.Text))
{
this.UpdateUi(view);
LayoutSubviews();
return;
}
if (string.IsNullOrWhiteSpace(view.Placeholder) && view.FormattedPlaceholder == null)
{
return;
}
var formattedPlaceholder = view.FormattedPlaceholder ?? view.Placeholder;
Control.AttributedText = formattedPlaceholder.ToAttributed(view.Font, view.TextColor);
LayoutSubviews();
}
/// <summary>
/// Updates the UI.
/// </summary>
/// <param name="view">
/// The view.
/// </param>
private void UpdateUi(ExtendedLabel view)
{
// Prefer font set through Font property.
if (view.Font == Font.Default)
{
if (view.FontSize > 0)
{
this.Control.Font = UIFont.FromName(this.Control.Font.Name, (float)view.FontSize);
}
if (!string.IsNullOrEmpty(view.FontName))
{
var fontName = Path.GetFileNameWithoutExtension(view.FontName);
var font = UIFont.FromName(fontName, this.Control.Font.PointSize);
if (font != null)
{
this.Control.Font = font;
}
}
#region ======= This is for backward compatability with obsolete attrbute 'FontNameIOS' ========
if (!string.IsNullOrEmpty(view.FontNameIOS))
{
var font = UIFont.FromName(view.FontNameIOS, (view.FontSize > 0) ? (float)view.FontSize : 12.0f);
if (font != null)
{
this.Control.Font = font;
}
}
#endregion ====== End of obsolete section ==========================================================
}
//Do not create attributed string if it is not necesarry
//if (!view.IsUnderline && !view.IsStrikeThrough && !view.IsDropShadow)
//{
// return;
//}
var underline = view.IsUnderline ? NSUnderlineStyle.Single : NSUnderlineStyle.None;
var strikethrough = view.IsStrikeThrough ? NSUnderlineStyle.Single : NSUnderlineStyle.None;
NSShadow dropShadow = null;
if (view.IsDropShadow)
{
dropShadow = new NSShadow
{
ShadowColor = view.DropShadowColor.ToUIColor(),
ShadowBlurRadius = 1.4f,
ShadowOffset = new CoreGraphics.CGSize(new CoreGraphics.CGPoint(0.3f, 0.8f))
};
}
// For some reason, if we try and convert Color.Default to a UIColor, the resulting color is
// either white or transparent. The net result is the ExtendedLabel does not display.
// Only setting the control's TextColor if is not Color.Default will prevent this issue.
if (view.TextColor != Color.Default)
{
this.Control.TextColor = view.TextColor.ToUIColor();
}
this.Control.AttributedText = new NSMutableAttributedString(view.Text,
this.Control.Font,
underlineStyle: underline,
strikethroughStyle: strikethrough,
shadow: dropShadow); ;
}
/// <summary>
/// Updates the UI.
/// </summary>
/// <param name="view">
/// The view.
/// </param>
/// <param name="control">
/// The control.
/// </param>
private void UpdateUi(ExtendedLabel view, TextBlock control)
{
if (view.FontSize > 0)
control.FontSize = (float)view.FontSize;
//control.FontSize = (view.FontSize > 0) ? (float)view.FontSize : 12.0f;
////need to do this ahead of font change due to unexpected behaviour if done later.
if (view.IsStrikeThrough)
{
//isn't perfect, but it's a start
var border = new Border
{
Height = 2,
Width = Control.ActualWidth,
Background = control.Foreground,
HorizontalAlignment = HorizontalAlignment.Center
};
Canvas.SetTop(border, control.FontSize * .72);
//Canvas.SetTop(border, (this.Control.ActualHeight / 2) - 0.5);
this.Children.Add(border);
//// STILL IN DEVELOPMENT === alternative and possibly more flexible grid method - Got stuck making this controls parent the grid below
//var strikeThroughGrid = new System.Windows.Controls.Grid();
//strikeThroughGrid.VerticalAlignment = VerticalAlignment.Top;
//strikeThroughGrid.HorizontalAlignment = HorizontalAlignment.Left;
////define rows
//var colDef1 = new System.Windows.Controls.RowDefinition { Height = new System.Windows.GridLength(1, System.Windows.GridUnitType.Star) };
//var colDef2 = new System.Windows.Controls.RowDefinition { Height = new System.Windows.GridLength(1, System.Windows.GridUnitType.Star) };
//strikeThroughGrid.RowDefinitions.Add(colDef1);
//strikeThroughGrid.RowDefinitions.Add(colDef2);
////add textblock
//strikeThroughGrid.Children.Add(control);
//System.Windows.Controls.Grid.SetRowSpan(control,2);
////add border
//var strikethroughBorder = new Border{BorderThickness = new System.Windows.Thickness(0,0,0,2) , BorderBrush = control.Foreground , Padding = new System.Windows.Thickness(0,0,0,control.FontSize*0.3)};
//strikeThroughGrid.Children.Add(strikethroughBorder);
}
if (!string.IsNullOrEmpty(view.FontName))
{
string filename = view.FontName;
//if no extension given then assume and add .ttf
if (filename.LastIndexOf(".", StringComparison.Ordinal) != filename.Length - 4)
{
filename = string.Format("{0}.ttf", filename);
}
if (LocalFontFileExists(filename)) //only substitute custom font if exists
{
control.FontFamily =
new FontFamily(string.Format(@"\Assets\Fonts\{0}#{1}", filename,
string.IsNullOrEmpty(view.FriendlyFontName)
? filename.Substring(0, filename.Length - 4)
: view.FriendlyFontName));
}
}
if (view.IsUnderline)
control.TextDecorations = TextDecorations.Underline;
}
