public static UIFont GetFontWithTraits(this UIFontDescriptorSymbolicTraits traits, nfloat size)
{
var desc = new UIFontDescriptor();
desc = desc.CreateWithTraits(traits);
return(UIFont.FromDescriptor(desc, size));
}
internal static bool IsBold(UIFont font)
{
UIFontDescriptor fontDescriptor = font.FontDescriptor;
UIFontDescriptorSymbolicTraits traits = fontDescriptor.SymbolicTraits;
return(traits.HasFlag(UIFontDescriptorSymbolicTraits.Bold));
}
UIFont MakeFont(string name, float fsize, UIFontDescriptorSymbolicTraits traits)
{
var desc = UIFontDescriptor.FromName(name, fsize);
desc = desc.CreateWithTraits(traits);
return(UIFont.FromDescriptor(desc, fsize));
}
void CreateNativeFont(FontFamily familyName, float emSize, FontStyle style, GraphicsUnit unit, byte gdiCharSet, bool gdiVerticalFont)
{
sizeInPoints = ConversionHelpers.GraphicsUnitConversion(unit, GraphicsUnit.Point, 96f, emSize);
bold = FontStyle.Bold == (style & FontStyle.Bold);
italic = FontStyle.Italic == (style & FontStyle.Italic);
underLine = FontStyle.Underline == (style & FontStyle.Underline);
this.size = emSize;
this.unit = unit;
var size = sizeInPoints * 96f / 72f;
UIFontDescriptorSymbolicTraits traits = 0;
if (bold)
{
traits |= UIFontDescriptorSymbolicTraits.Bold;
}
if (italic)
{
traits |= UIFontDescriptorSymbolicTraits.Italic;
}
UIFont font = null;
if (NSThread.Current.IsMainThread)
{
font = MakeFont(familyName.Name, size, traits);
}
else
{
NSThread.MainThread.InvokeOnMainThread(() => { font = MakeFont(familyName.Name, size, traits); });
}
nativeFont = font.ToCTFont();
}
/// <summary>
/// Applies a font style to the current font.
/// </summary>
/// <param name="font">A font.</param>
/// <param name="fontStyle">The font style.</param>
/// <returns>A new font with the specified style applied.</returns>
public static UIFont ApplyStyle(this UIFont font, FontStyle fontStyle)
{
if (fontStyle == FontStyle.None)
{
return(font);
}
UIFontDescriptorSymbolicTraits traits = UIFontDescriptorSymbolicTraits.ClassUnknown;
if ((fontStyle & FontStyle.Bold) == FontStyle.Bold)
{
traits = UIFontDescriptorSymbolicTraits.Bold;
}
if ((fontStyle & FontStyle.Italic) == FontStyle.Italic)
{
traits |= UIFontDescriptorSymbolicTraits.Italic;
}
UIFontDescriptor fontDescriptor = font.FontDescriptor.CreateWithTraits(traits);
if (fontDescriptor == null)
{
throw new ArgumentException("The font style (" + fontStyle + ") is not supported for font (" + font.Name + ").", nameof(fontStyle));
}
return(UIFont.FromDescriptor(fontDescriptor, 0));
}
public static UIFont WithTraits(this UIFont font, UIFontDescriptorSymbolicTraits traits)
{
// https://stackoverflow.com/questions/18862868/setting-bold-font-on-ios-uilabel/21776838#21776838
var descriptor = font.FontDescriptor.CreateWithTraits(traits);
return(UIFont.FromDescriptor(descriptor, 0));
}
public Element MakeMultilineSample(string text, UIFontDescriptorSymbolicTraits trait)
{
var font = UIFont.FromDescriptor(baseline.CreateWithTraits(trait), 0);
return(new StyledMultilineElement(text)
{
Font = font
});
}
internal static UIFont WithTraitsOfFont(this UIFont self, UIFont font)
{
UIFontDescriptor fontDescriptor = self.FontDescriptor;
UIFontDescriptorSymbolicTraits traits = fontDescriptor.SymbolicTraits;
traits = traits | font.FontDescriptor.SymbolicTraits;
UIFontDescriptor boldFontDescriptor = fontDescriptor.CreateWithTraits(traits);
return(UIFont.FromDescriptor(boldFontDescriptor, self.PointSize));
}
internal static UIFont Bold(this UIFont font)
{
UIFontDescriptor fontDescriptor = font.FontDescriptor;
UIFontDescriptorSymbolicTraits traits = fontDescriptor.SymbolicTraits;
traits = traits | UIFontDescriptorSymbolicTraits.Bold;
UIFontDescriptor boldFontDescriptor = fontDescriptor.CreateWithTraits(traits);
return(UIFont.FromDescriptor(boldFontDescriptor, font.PointSize));
}
void UpdateStyleAttributes(UIFontDescriptorSymbolicTraits fontAttr)
{
var selectionRange = Control.SelectedRange;
bool hasFlag = false;
AttributedText.EnumerateAttribute(UIStringAttributeKey.Font, selectionRange, NSAttributedStringEnumeration.LongestEffectiveRangeNotRequired, (NSObject value, NSRange range, ref bool stop) =>
{
if (value != null)
{
var font = (UIFont)value;
var descriptor = font.FontDescriptor;
if (descriptor.SymbolicTraits.HasFlag(fontAttr))
{
hasFlag = true;
AttributedText.RemoveAttribute(UIStringAttributeKey.Font, range);
var newFont = UIFont.SystemFontOfSize(font.PointSize);
if (fontAttr == UIFontDescriptorSymbolicTraits.Bold && descriptor.SymbolicTraits.HasFlag(UIFontDescriptorSymbolicTraits.Italic))
{
newFont = UIFont.ItalicSystemFontOfSize(font.PointSize);
}
else if (fontAttr == UIFontDescriptorSymbolicTraits.Italic && descriptor.SymbolicTraits.HasFlag(UIFontDescriptorSymbolicTraits.Bold))
{
newFont = UIFont.BoldSystemFontOfSize(font.PointSize);
}
AttributedText.AddAttribute(UIStringAttributeKey.Font, newFont, range);
CurrentFont = newFont;
}
}
});
if (!hasFlag)
{
AttributedText.EnumerateAttribute(UIStringAttributeKey.Font, selectionRange, NSAttributedStringEnumeration.None, (NSObject value, NSRange range, ref bool stop) =>
{
if (value != null)
{
var font = (UIFont)value;
var descriptor = font.FontDescriptor;
var traits = descriptor.SymbolicTraits;
var newTraits = (UIFontDescriptorSymbolicTraits)((uint)fontAttr + (uint)traits);
var newDescriptor = descriptor.CreateWithTraits(newTraits);
var newFont = UIFont.FromDescriptor(newDescriptor, font.PointSize);
AttributedText.RemoveAttribute(UIStringAttributeKey.Font, range);
AttributedText.AddAttribute(UIStringAttributeKey.Font, newFont, range);
CurrentFont = newFont;
}
});
}
}
public static UIFont ToFont(this Font font)
{
var nsFont = UIFont.FromName(font.Name, font.Size);
if (nsFont == null)
{
return(null);
}
if (font.Style == FontStyle.Unknown)
{
return(nsFont);
}
UIFontDescriptorSymbolicTraits trait = UIFontDescriptorSymbolicTraits.ClassUnknown;
switch (font.Style)
{
case FontStyle.Bold:
trait = UIFontDescriptorSymbolicTraits.Bold;
break;
case FontStyle.BoldItalic:
trait = UIFontDescriptorSymbolicTraits.Bold | UIFontDescriptorSymbolicTraits.Italic;
break;
case FontStyle.Italic:
trait = UIFontDescriptorSymbolicTraits.Italic;
break;
default:
trait = 0;
break;
}
using (var desc = nsFont.FontDescriptor.CreateWithTraits(trait))
{
return(UIFont.FromDescriptor(desc, font.Size));
}
}
public RadioButton_Mobile()
{
View = new UIView();
//Main statck
layer.BorderWidth = 1.5f;
layer.CornerRadius = 10;
layer.BorderColor = UIColor.FromRGB(205, 205, 205).CGColor;
Layer.AddSublayer(layer);
//inner layer
innerLayer.BorderWidth = 1.5f;
innerLayer.CornerRadius = 10;
innerLayer.BorderColor = UIColor.FromRGB(205, 205, 205).CGColor;
mainStackView.Layer.AddSublayer(innerLayer);
descriptor = new UIFontDescriptor().CreateWithFamily(amntLabl.Font.FamilyName);
traits = traits | UIFontDescriptorSymbolicTraits.Bold;
descriptor = descriptor.CreateWithTraits(traits);
//heading
hedinglbl.Text = "Complete your Payment";
hedinglbl.TextColor = UIColor.FromRGB(85, 85, 85);
hedinglbl.Font = UIFont.FromDescriptor(descriptor, 20);
mainStackView.AddSubview(hedinglbl);
//payable
payamountlabl.Text = "Total payable amount";
payamountlabl.TextColor = UIColor.Black;
mainStackView.AddSubview(payamountlabl);
//amount
amntLabl.Text = "$120";
amntLabl.TextColor = UIColor.FromRGB(0, 125, 230);
amntLabl.Font = UIFont.FromDescriptor(descriptor, 18);
mainStackView.AddSubview(amntLabl);
//amount
selcetPaylbl.Text = "Select your payment mode";
mainStackView.AddSubview(selcetPaylbl);
//RadioGroup
sfr.Axis = UILayoutConstraintAxis.Vertical;
sfr.Spacing = 20;
netBanking.SetTitle("Net banking", UIControlState.Normal);
netBanking.StateChanged += paymentMode_StateChanged;
sfr.AddArrangedSubview(netBanking);
debitCard.SetTitle("Debit card", UIControlState.Normal);
debitCard.StateChanged += paymentMode_StateChanged;
sfr.AddArrangedSubview(debitCard);
creditCard.SetTitle("Credit card", UIControlState.Normal);
creditCard.StateChanged += paymentMode_StateChanged;
sfr.AddArrangedSubview(creditCard);
mainStackView.AddSubview(sfr);
View.AddSubview(mainStackView);
button.SetTitle("Pay Now", UIControlState.Normal);
button.SetTitleColor(UIColor.LightGray, UIControlState.Disabled);
button.SetTitleColor(UIColor.White, UIControlState.Normal);
button.TouchDown += Button_Clicked;
button.BackgroundColor = UIColor.FromRGB(0, 125, 230);
button.Enabled = false;
alertView.Message = "Payment Successfull !";
alertView.AddButton("OK");
View.AddSubview(button);
AddSubview(View);
}
internal static UIFont BestFont(string family, nfloat size, bool bold = false, bool italic = false, Assembly assembly = null)
{
if (family == null)
{
family = ".AppleSystemUIFont";
}
if (family.ToLower() == "monospace")
{
family = "Menlo";
}
if (family.ToLower() == "serif")
{
family = "Times New Roman";
}
if (family.ToLower() == "sans-serif")
{
family = ".AppleSystemUIFont";
}
if (size < 0)
{
size = (nfloat)(UIFont.LabelFontSize * Math.Abs(size));
}
// is it in the cache?
var key = new FontKey(family, size, bold, italic);
Dictionary <FontKey, UIFont> dictionary = UiFontCache;
lock (dictionary)
{
if (dictionary.TryGetValue(key, out UIFont storedUiFont))
{
return(storedUiFont);
}
}
UIFont bestAttemptFont = null;
if (UIFont.FamilyNames.Contains(family))
{
// a system font
var fontNames = FontFamilies.FontsForFamily(family);
string baseFontName = null;
string reqFontName = null;
//string fallbackFontName = null;
if (fontNames != null && fontNames.Count > 0)
{
if (fontNames.Count == 1)
{
baseFontName = fontNames[0];
if (!bold && !italic)
{
reqFontName = fontNames[0];
}
}
else
{
int shortestMatchLength = int.MaxValue;
int shortestBaseLength = int.MaxValue;
foreach (var fontName in fontNames)
{
var lowerName = fontName.ToLower();
bool nameHasBold = lowerName.Contains("bold") || lowerName == "avenir-black";
bool nameHasItalic = lowerName.Contains("italic") || lowerName.Contains("oblique");
// assume the shortest name is the base font name
if (lowerName.Length < shortestBaseLength)
{
baseFontName = fontName;
shortestBaseLength = lowerName.Length;
}
// assume the shortest name with matching attributes is a match
if (nameHasBold == bold && nameHasItalic == italic && lowerName.Length < shortestMatchLength)
{
reqFontName = fontName;
shortestMatchLength = lowerName.Length;
}
if (lowerName.Contains("-regular"))
{
baseFontName = fontName;
shortestBaseLength = -1;
if (!bold && !italic)
{
reqFontName = fontName;
shortestMatchLength = -1;
break;
}
}
}
}
}
if (reqFontName != null)
{
bestAttemptFont = UIFont.FromName(reqFontName, size);
}
if (bestAttemptFont == null && baseFontName != null && !bold && !italic)
{
bestAttemptFont = UIFont.FromName(baseFontName, size);
}
}
else
{
// an embedded font or a explicitly named system font?
bestAttemptFont = EmbeddedFont(family, size, assembly);
if (bestAttemptFont == null && !family.StartsWith(".SFUI"))
{
bestAttemptFont = UIFont.FromName(family, size);
}
}
if (bestAttemptFont != null)
{
if (bold || italic)
{
if (bestAttemptFont.FontDescriptor.CreateWithTraits(
(bold ? UIFontDescriptorSymbolicTraits.Bold : UIFontDescriptorSymbolicTraits.ClassUnknown)
|
(italic ? UIFontDescriptorSymbolicTraits.Italic : UIFontDescriptorSymbolicTraits.ClassUnknown)
) is UIFontDescriptor descriptor)
{
bestAttemptFont = UIFont.FromDescriptor(descriptor, size);
}
}
// we have a match but is wasn't cached - so let's cache it for future reference
lock (dictionary)
{
if (!dictionary.TryGetValue(key, out UIFont storedUiFont))
{
// It could have been added by another thread so only add if we're really sure it's no there!
dictionary.Add(key, bestAttemptFont);
}
}
return(bestAttemptFont);
}
UIFontWeight fontWeight = UIFontWeight.Regular;
if (family.StartsWith(".SFUI"))
{
var parts = family.Split("-");
if (parts.Length > 1)
{
var weightText = parts[1];
switch (weightText)
{
case nameof(UIFontWeight.Black):
fontWeight = UIFontWeight.Black;
break;
case nameof(UIFontWeight.Bold):
fontWeight = UIFontWeight.Bold;
break;
case nameof(UIFontWeight.Heavy):
fontWeight = UIFontWeight.Heavy;
break;
case nameof(UIFontWeight.Light):
fontWeight = UIFontWeight.Light;
break;
case nameof(UIFontWeight.Medium):
fontWeight = UIFontWeight.Medium;
break;
case nameof(UIFontWeight.Regular):
fontWeight = UIFontWeight.Medium;
break;
case nameof(UIFontWeight.Semibold):
fontWeight = UIFontWeight.Semibold;
break;
case nameof(UIFontWeight.Thin):
fontWeight = UIFontWeight.Thin;
break;
case nameof(UIFontWeight.UltraLight):
fontWeight = UIFontWeight.UltraLight;
break;
default:
fontWeight = UIFontWeight.Regular;
break;
}
}
// fall back to a system font
}
// fall back to a system font
if (bold && italic || (fontWeight != UIFontWeight.Regular && (bold || italic)))
{
UIFont systemFont = UIFont.SystemFontOfSize(size, fontWeight);
UIFontDescriptorSymbolicTraits traits = (bold ? UIFontDescriptorSymbolicTraits.Bold : (UIFontDescriptorSymbolicTraits)0) | (italic ? UIFontDescriptorSymbolicTraits.Italic : (UIFontDescriptorSymbolicTraits)0);
var descriptor = systemFont.FontDescriptor.CreateWithTraits(traits);
bestAttemptFont = UIFont.FromDescriptor(descriptor, size);
}
if (bestAttemptFont == null && italic)
{
bestAttemptFont = UIFont.ItalicSystemFontOfSize(size);
}
if (bestAttemptFont == null && bold)
{
bestAttemptFont = UIFont.BoldSystemFontOfSize(size);
}
if (bestAttemptFont == null)
{
bestAttemptFont = UIFont.SystemFontOfSize(size, fontWeight);
}
return(bestAttemptFont);
}
public static UIFont WithTraits(this UIFont font, UIFontDescriptorSymbolicTraits traits)
{
var descriptor = font.FontDescriptor.CreateWithTraits(traits);
return(UIFont.FromDescriptor(descriptor, 0));
}
public virtual UIFontDescriptor FontDescriptorWithSymbolicTraits(UIFontDescriptorSymbolicTraits symbolicTraits)
{
return(default(UIFontDescriptor));
}
public Element MakeMultilineSample (string text, UIFontDescriptorSymbolicTraits trait)
{
var font = UIFont.FromDescriptor (baseline.CreateWithTraits (trait), 0);
return new StyledMultilineElement (text) { Font = font };
}
internal unsafe static XFontSource CreateFontSource(string familyName, FontResolvingOptions fontResolvingOptions, string typefaceKey)
{
if (string.IsNullOrEmpty(typefaceKey))
{
typefaceKey = XGlyphTypeface.ComputeKey(familyName, fontResolvingOptions);
}
var descriptor = UIFont.FromName(familyName, 20.0f).FontDescriptor;
UIFontDescriptorSymbolicTraits traits = 0;
if (fontResolvingOptions.IsItalic)
{
traits |= UIFontDescriptorSymbolicTraits.Italic;
}
if (fontResolvingOptions.IsBold)
{
traits |= UIFontDescriptorSymbolicTraits.Bold;
}
var uifont = UIFont.FromDescriptor(descriptor.CreateWithTraits(traits), 20.0f);
var cgFont = CGFont.CreateWithFontName(uifont.Name);
IntPtr tags = CGFontCopyTableTags(cgFont.Handle);
nint tableCount = CFArrayGetCount(tags);
nint totalSize = sizeof(FontHeader) + sizeof(TableEntry) * tableCount;
for (int index = 0; index < tableCount; ++index)
{
nint tableSize = 0;
int aTag = (int)CFArrayGetValueAtIndex(tags, index);
IntPtr tableDataRef = CGFontCopyTableForTag(cgFont.Handle, aTag);
if (tableDataRef != IntPtr.Zero)
{
tableSize = CFDataGetLength(tableDataRef);
CFRelease(tableDataRef);
}
totalSize += (tableSize + 3) & ~3;
}
var data = new byte[totalSize];
fixed(byte *dataStart = data)
{
byte *dataPtr = dataStart;
UInt16 entrySelector = 0;
UInt16 searchRange = 1;
while (searchRange < tableCount >> 1)
{
entrySelector++;
searchRange <<= 1;
}
searchRange <<= 4;
UInt16 rangeShift = (UInt16)((tableCount << 4) - searchRange);
FontHeader *offsetTable = (FontHeader *)dataPtr;
offsetTable->fVersion = (Int32)SwapBytes((UInt16)1);
offsetTable->fNumTables = SwapBytes((UInt16)tableCount);
offsetTable->fSearchRange = SwapBytes((UInt16)searchRange);
offsetTable->fEntrySelector = SwapBytes((UInt16)entrySelector);
offsetTable->fRangeShift = SwapBytes((UInt16)rangeShift);
dataPtr += sizeof(FontHeader);
TableEntry *entry = (TableEntry *)dataPtr;
dataPtr += sizeof(TableEntry) * tableCount;
for (int index = 0; index < tableCount; ++index)
{
int aTag = (int)CFArrayGetValueAtIndex(tags, index);
IntPtr tableDataRef = CGFontCopyTableForTag(cgFont.Handle, aTag);
nint tableSize = 0;
if (tableDataRef != IntPtr.Zero)
{
tableSize = CFDataGetLength(tableDataRef);
Buffer.MemoryCopy((byte *)CFDataGetBytePtr(tableDataRef), dataPtr, tableSize, tableSize);
entry->fTag = SwapBytes((UInt32)aTag);
entry->fCheckSum = SwapBytes(CalcTableCheckSum((UInt32 *)dataPtr, tableSize));
UInt32 offset = (UInt32)(dataPtr - dataStart);
entry->fOffset = SwapBytes((UInt32)offset);
entry->fLength = SwapBytes((UInt32)tableSize);
CFRelease(tableDataRef);
}
dataPtr += (tableSize + 3) & ~3;
++entry;
}
}
var fontSource = XFontSource.GetOrCreateFrom(typefaceKey, data);
return(fontSource);
}
private static UIFont StyleText(UIFont currentFont, UIFontDescriptorSymbolicTraits symbolicTraits)
{
var descriptor = currentFont.FontDescriptor.CreateWithTraits(symbolicTraits);
return(UIFont.FromDescriptor(descriptor, 0));
}
