/// <summary>
/// Convert Xamarin.Forms.TextAlignment to Mapsui/RichTextKit.Styles.Color
/// </summary>
/// <param name="textAlignment">TextAlignment in Xamarin.Forms format</param>
/// <returns>TextAlignment in Mapsui/RichTextKit format</returns>
public static Alignment ToMapsui(this Xamarin.Forms.TextAlignment textAlignment)
{
Alignment result;
switch (textAlignment)
{
case Xamarin.Forms.TextAlignment.Start:
result = Alignment.Left;
break;
case Xamarin.Forms.TextAlignment.Center:
result = Alignment.Center;
break;
case Xamarin.Forms.TextAlignment.End:
result = Alignment.Right;
break;
default:
result = Alignment.Auto;
break;
}
return(result);
}
public static UIControlContentVerticalAlignment ConvertToVerticalAlignment(Xamarin.Forms.TextAlignment alignment)
{
switch (alignment)
{
default:
case Xamarin.Forms.TextAlignment.Center: return(UIControlContentVerticalAlignment.Center);
case Xamarin.Forms.TextAlignment.Start: return(UIControlContentVerticalAlignment.Top);
case Xamarin.Forms.TextAlignment.End: return(UIControlContentVerticalAlignment.Bottom);
}
}
internal static GravityFlags ToHorizontalGravityFlags(this Xamarin.Forms.TextAlignment alignment)
{
switch (alignment)
{
case Xamarin.Forms.TextAlignment.Center:
return(GravityFlags.CenterHorizontal);
case Xamarin.Forms.TextAlignment.End:
return(GravityFlags.Right);
default:
return(GravityFlags.Left);
}
}
static GravityFlags ConvertYAlignment(Xamarin.Forms.TextAlignment yAlign)
{
switch (yAlign)
{
case Xamarin.Forms.TextAlignment.Center:
return(GravityFlags.CenterVertical);
case Xamarin.Forms.TextAlignment.End:
return(GravityFlags.Bottom);
default:
return(GravityFlags.Top);
}
}
static GravityFlags ConvertXAlignment(Xamarin.Forms.TextAlignment xAlign)
{
switch (xAlign)
{
case Xamarin.Forms.TextAlignment.Center:
return(GravityFlags.CenterHorizontal);
case Xamarin.Forms.TextAlignment.End:
return(GravityFlags.End);
default:
return(GravityFlags.Start);
}
}
public static GravityFlags ToHorizontalGravityFlags(this Xamarin.Forms.TextAlignment alignment)
{
switch (alignment)
{
case Xamarin.Forms.TextAlignment.Center:
return(GravityFlags.AxisSpecified);
case Xamarin.Forms.TextAlignment.End:
return(GravityFlags.End);
default:
return(GravityFlags.Start);
}
}
public static GravityFlags ToVerticalGravityFlags(this Xamarin.Forms.TextAlignment alignment)
{
switch (alignment)
{
case Xamarin.Forms.TextAlignment.Start:
return(GravityFlags.Top);
case Xamarin.Forms.TextAlignment.End:
return(GravityFlags.Bottom);
default:
return(GravityFlags.CenterVertical);
}
}
public static HorizontalAlignment ToContentHorizontalAlignment(this TextAlignment alignment)
{
switch (alignment)
{
case TextAlignment.Center:
return(HorizontalAlignment.Center);
case TextAlignment.End:
return(HorizontalAlignment.Right);
case TextAlignment.Start:
return(HorizontalAlignment.Left);
}
throw new InvalidOperationException(alignment.ToString());
}
public static TextAlignment ToNative(this Xamarin.Forms.TextAlignment formsTextAlignment)
{
switch (formsTextAlignment)
{
case Xamarin.Forms.TextAlignment.Center:
return(TextAlignment.Center);
case Xamarin.Forms.TextAlignment.End:
return(TextAlignment.Right);
case Xamarin.Forms.TextAlignment.Start:
return(TextAlignment.Left);
}
return(TextAlignment.Center);
}
/// <summary>
/// To the droid vertical gravity.
/// </summary>
/// <param name="alignment">The alignment.</param>
/// <returns>GravityFlags.</returns>
/// <exception cref="System.InvalidOperationException"></exception>
public static GravityFlags ToDroidVerticalGravity(this TextAlignment alignment)
{
switch (alignment)
{
case TextAlignment.Center:
return(GravityFlags.CenterVertical);
case TextAlignment.End:
return(GravityFlags.Bottom);
case TextAlignment.Start:
return(GravityFlags.Top);
}
throw new InvalidOperationException(alignment.ToString());
}
public static VerticalAlignment ToContentVerticalAlignment(this TextAlignment alignment)
{
switch (alignment)
{
case TextAlignment.Center:
return(VerticalAlignment.Center);
case TextAlignment.End:
return(VerticalAlignment.Bottom);
case TextAlignment.Start:
return(VerticalAlignment.Top);
}
throw new InvalidOperationException(alignment.ToString());
}
/// <summary>
/// To the droid horizontal gravity.
/// </summary>
/// <param name="alignment">The alignment.</param>
/// <returns>GravityFlags.</returns>
/// <exception cref="System.InvalidOperationException"></exception>
public static GravityFlags ToDroidHorizontalGravity(this TextAlignment alignment)
{
switch (alignment)
{
case TextAlignment.Center:
return(GravityFlags.CenterHorizontal);
case TextAlignment.End:
return(GravityFlags.Right);
case TextAlignment.Start:
return(GravityFlags.Left);
}
throw new InvalidOperationException(alignment.ToString());
}
/// <summary>
/// To the droid text alignment.
/// </summary>
/// <param name="alignment">The alignment.</param>
/// <returns>DroidTextAlignment.</returns>
/// <exception cref="System.InvalidOperationException"></exception>
public static DroidTextAlignment ToDroidTextAlignment(this TextAlignment alignment)
{
switch (alignment)
{
case TextAlignment.Center:
return(DroidTextAlignment.Center);
case TextAlignment.End:
return(DroidTextAlignment.ViewEnd);
case TextAlignment.Start:
return(DroidTextAlignment.ViewStart);
}
throw new InvalidOperationException(alignment.ToString());
}
public static Android.Views.TextAlignment ToUITextAlignment(Xamarin.Forms.TextAlignment alignment)
{
switch (alignment)
{
case Xamarin.Forms.TextAlignment.Start:
return(Android.Views.TextAlignment.TextStart);
case Xamarin.Forms.TextAlignment.Center:
return(Android.Views.TextAlignment.Center);
case Xamarin.Forms.TextAlignment.End:
return(Android.Views.TextAlignment.TextEnd);
default:
return(Android.Views.TextAlignment.TextStart);
}
}
public static GravityFlags ToNative(this Xamarin.Forms.TextAlignment textAlignment)
{
switch (textAlignment)
{
case Xamarin.Forms.TextAlignment.Center:
return(GravityFlags.Center);;
case Xamarin.Forms.TextAlignment.Start:
return(GravityFlags.Start);
case Xamarin.Forms.TextAlignment.End:
return(GravityFlags.End);
default:
return(GravityFlags.Start);
}
}
public void DrawText(string text, float x, float y, float width, float height, Xamarin.Forms.TextAlignment hAlignment, Xamarin.Forms.TextAlignment vAlignment)
{
if (font == null || font.NativeFont == null)
{
return;
}
var attributedString = new NSAttributedString(text, new CTStringAttributes()
{
Font = font.NativeFont, ForegroundColorFromContext = true
});
CTLine ctLine = new CTLine(attributedString);
CGSize size = new CGSize((float)ctLine.GetTypographicBounds(), font.NativeFont.CapHeightMetric + font.NativeFont.DescentMetric);
if ((hAlignment & Xamarin.Forms.TextAlignment.Center) != 0)
{
x += (width - (float)size.Width) / 2;
}
else if ((hAlignment & Xamarin.Forms.TextAlignment.End) != 0)
{
x += width - (float)size.Width;
}
if ((vAlignment & Xamarin.Forms.TextAlignment.Center) != 0)
{
y += (height - (float)size.Height) / 2;
}
else if ((vAlignment & Xamarin.Forms.TextAlignment.End) != 0)
{
y += height - (float)size.Height;
}
context.SaveState();
context.ScaleCTM(1f, -1f);
context.TextPosition = new CGPoint(x, -y - font.NativeFont.CapHeightMetric);
ctLine.Draw(context);
context.RestoreState();
ctLine.Dispose();
attributedString.Dispose();
}
public static UIControlContentHorizontalAlignment ConvertToHorizontalAlignment(Xamarin.Forms.TextAlignment alignment)
{
switch (alignment)
{
default:
case Xamarin.Forms.TextAlignment.Center: return(UIControlContentHorizontalAlignment.Center);
case Xamarin.Forms.TextAlignment.Start: return(UIControlContentHorizontalAlignment.Left);
case Xamarin.Forms.TextAlignment.End: return(UIControlContentHorizontalAlignment.Right);
}
}
internal static ATextAlignment ToTextAlignment(this TextAlignment alignment) => alignment switch
{
public void DrawText(string text, float x, float y, float width, float height, Xamarin.Forms.TextAlignment hAlignment, Xamarin.Forms.TextAlignment vAlignment)
{
CanvasTextFormat textFormat = font != null ? ((Font)font).NativeTextFormat : defaultTextFormat;
switch (hAlignment)
{
case Xamarin.Forms.TextAlignment.Start: textFormat.HorizontalAlignment = CanvasHorizontalAlignment.Left; break;
case Xamarin.Forms.TextAlignment.Center: textFormat.HorizontalAlignment = CanvasHorizontalAlignment.Center; break;
case Xamarin.Forms.TextAlignment.End: textFormat.HorizontalAlignment = CanvasHorizontalAlignment.Right; break;
}
switch (vAlignment)
{
case Xamarin.Forms.TextAlignment.Start: textFormat.VerticalAlignment = CanvasVerticalAlignment.Top; break;
case Xamarin.Forms.TextAlignment.Center: textFormat.VerticalAlignment = CanvasVerticalAlignment.Center; break;
case Xamarin.Forms.TextAlignment.End: textFormat.VerticalAlignment = CanvasVerticalAlignment.Bottom; break;
}
ds.DrawText(text, x, y, width, height, color, textFormat);
}
public void DrawText(string text, float x, float y, float width, float height, Xamarin.Forms.TextAlignment hAlignment, Xamarin.Forms.TextAlignment vAlignment)
{
Paint.FontMetrics fm = paintFill.GetFontMetrics();
float textWidth = paintFill.MeasureText(text);
float textHeight = fm.Descent - fm.Ascent;
if ((hAlignment & Xamarin.Forms.TextAlignment.Center) != 0)
{
x += (width - textWidth) / 2;
}
else if ((hAlignment & Xamarin.Forms.TextAlignment.End) != 0)
{
x += width - textWidth;
}
if ((vAlignment & Xamarin.Forms.TextAlignment.Center) != 0)
{
y += (height - textHeight) / 2;
}
else if ((vAlignment & Xamarin.Forms.TextAlignment.End) != 0)
{
y += height - textHeight;
}
canvas.DrawText(text, x, y - fm.Ascent, paintFill);
}
