/// <summary>
/// Creates a new style value expression for the style key with the expression and an optional convertor and base value
/// </summary>
/// <param name="key">The style key this expression is assigned for</param>
/// <param name="expressionString">The exppresion to be evaluated at runtime</param>
/// <param name="convertor">An otpional convertor to make the result the required type</param>
/// <param name="baseValue">An optional base value that will be returned before the expression is bound</param>
public StyleValueExpression(PDFStyleKey <T> key, string expressionString, StyleValueConvertor <T> convertor, T baseValue)
: base(key, baseValue)
{
this._expressionString = expressionString ?? throw new ArgumentNullException(nameof(expressionString));
this._convertor = convertor;
this._variableProvider = null;
this._expression = null;
}
/// <summary>
/// Creates a new Border style
/// </summary>
public BorderSideStyle(Sides forSide, StyleKey forKey, PDFStyleKey <PDFColor> colorKey, PDFStyleKey <PDFUnit> widthkey, PDFStyleKey <LineType> lineStyleKey, PDFStyleKey <PDFDash> dashkey) :
base(forKey)
{
_side = forSide;
_color = colorKey;
_width = widthkey;
_line = lineStyleKey;
_dash = dashkey;
}
/// <summary>
/// Sets a value of a known type for this style item, based on the specified key.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="itembase"></param>
/// <param name="key"></param>
/// <param name="value"></param>
public static void SetValue <T>(this StyleItemBase itembase, PDFStyleKey <T> key, T value)
{
StyleValue <T> found;
if (itembase.AssertOwner().TryGetValue(key, out found))
{
found.SetValue(value);
}
else
{
found = new StyleValue <T>(key, value);
itembase.AddBaseValue(found);
}
}
/// <summary>
/// Attempts to retrieve a value of the known type from this StyleItem
/// </summary>
/// <typeparam name="T">The type of value to retrieve</typeparam>
/// <param name="itembase">This style item</param>
/// <param name="key">The style key of the value to retrieve</param>
/// <param name="found">Set to the value of any found item, or default value.</param>
/// <returns>True if the item has a reference to the value required, otherwise false.</returns>
public static bool TryGetValue <T>(this StyleItemBase itembase, PDFStyleKey <T> key, out T found)
{
StyleValue <T> exist;
if (itembase.AssertOwner().TryGetValue(key, out exist))
{
found = exist.Value;
return(true);
}
else
{
found = default(T);
return(false);
}
}
public StyleValue(PDFStyleKey <T> key, T value)
: base(key)
{
this._value = value;
}
//
// .ctor
//
#region public StyleValueExpression(PDFStyleKey<T> key, string expressionString, StyleValueConvertor<T> convertor)
/// <summary>
/// Creates a new style value expression for the style key with the expression and an optional convertor
/// </summary>
/// <param name="key">The style key this expression is assigned for</param>
/// <param name="expressionString">The exppresion to be evaluated at runtime</param>
/// <param name="convertor">An otpional convertor to make the result the required type</param>
public StyleValueExpression(PDFStyleKey <T> key, string expressionString, StyleValueConvertor <T> convertor)
: this(key, expressionString, convertor, default)
{
}