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using EColor = ElmSharp.Color;
namespace Xamarin.Forms.Platform.Tizen
{
public class LabelRenderer : ViewRenderer<Label, Native.Label>
{
static readonly EColor s_defaultBackgroundColor = EColor.Transparent;
static readonly EColor s_defaultForegroundColor = EColor.Black;
static readonly EColor s_defaultTextColor = s_defaultForegroundColor;
public LabelRenderer()
{
RegisterPropertyHandler(Label.TextProperty, () => Control.Text = Element.Text);
RegisterPropertyHandler(Label.TextColorProperty, UpdateTextColor);
// FontProperty change is called also for FontSizeProperty, FontFamilyProperty and FontAttributesProperty change
RegisterPropertyHandler(Label.FontProperty, UpdateFontProperties);
RegisterPropertyHandler(Label.LineBreakModeProperty, UpdateLineBreakMode);
RegisterPropertyHandler(Label.HorizontalTextAlignmentProperty, UpdateTextAlignment);
RegisterPropertyHandler(Label.VerticalTextAlignmentProperty, UpdateTextAlignment);
RegisterPropertyHandler(Label.FormattedTextProperty, UpdateFormattedText);
}
protected override void OnElementChanged(ElementChangedEventArgs<Label> e)
{
if (Control == null)
{
var label = new Native.Label(Forms.Context.MainWindow);
base.SetNativeControl(label);
}
if (e.OldElement != null)
{
}
if (e.NewElement != null)
{
}
base.OnElementChanged(e);
}
protected override Size MinimumSize()
{
return new Size(Control.MinimumWidth, Control.MinimumHeight);
}
Native.FormattedString ConvertFormattedText(FormattedString formattedString)
{
if (formattedString == null)
{
return null;
}
Native.FormattedString nativeString = new Native.FormattedString();
foreach (var span in formattedString.Spans)
{
Native.Span nativeSpan = new Native.Span();
nativeSpan.FormattedText = span.Text;
nativeSpan.FontAttributes = span.FontAttributes == FontAttributes.None ? Element.FontAttributes : span.FontAttributes;
nativeSpan.FontFamily = span.FontFamily == null ? Element.FontFamily : span.FontFamily;
nativeSpan.FontSize = span.FontSize == Device.GetNamedSize(NamedSize.Default, typeof(Label), true) ? Element.FontSize : span.FontSize;
nativeSpan.LineBreakMode = Control.LineBreakMode;
nativeSpan.HorizontalTextAlignment = Control.HorizontalTextAlignment;
if (span.ForegroundColor.IsDefault)
nativeSpan.ForegroundColor = Element.TextColor.IsDefault ? s_defaultForegroundColor : Element.TextColor.ToNative();
else
nativeSpan.ForegroundColor = span.ForegroundColor.ToNative();
if (span.BackgroundColor.IsDefault)
nativeSpan.BackgroundColor = Element.BackgroundColor.IsDefault ? s_defaultBackgroundColor : Element.BackgroundColor.ToNative();
else
nativeSpan.BackgroundColor = span.BackgroundColor.ToNative();
nativeString.Spans.Add(nativeSpan);
}
return nativeString;
}
void UpdateFormattedText()
{
if(Element.FormattedText != null)
Control.FormattedText = ConvertFormattedText(Element.FormattedText);
}
void UpdateTextColor()
{
Control.TextColor = Element.TextColor.IsDefault ? s_defaultTextColor : Element.TextColor.ToNative();
UpdateFormattedText();
}
void UpdateTextAlignment()
{
Control.HorizontalTextAlignment = Element.HorizontalTextAlignment.ToNative();
Control.VerticalTextAlignment = Element.VerticalTextAlignment.ToNative();
UpdateFormattedText();
}
void UpdateFontProperties()
{
Control.FontSize = Element.FontSize;
Control.FontAttributes = Element.FontAttributes;
Control.FontFamily = Element.FontFamily;
UpdateFormattedText();
}
void UpdateLineBreakMode()
{
Control.LineBreakMode = ConvertToNativeLineBreakMode(Element.LineBreakMode);
UpdateFormattedText();
}
Native.LineBreakMode ConvertToNativeLineBreakMode(LineBreakMode mode)
{
switch (mode)
{
case LineBreakMode.CharacterWrap:
return Native.LineBreakMode.CharacterWrap;
case LineBreakMode.HeadTruncation:
return Native.LineBreakMode.HeadTruncation;
case LineBreakMode.MiddleTruncation:
return Native.LineBreakMode.MiddleTruncation;
case LineBreakMode.NoWrap:
return Native.LineBreakMode.NoWrap;
case LineBreakMode.TailTruncation:
return Native.LineBreakMode.TailTruncation;
case LineBreakMode.WordWrap:
default:
return Native.LineBreakMode.WordWrap;
}
}
}
}
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