public bool Contains(object key)
{
if (key == null)
{
throw new ArgumentNullException("key");
}
if (!(key is string || key is Type))
{
throw new ArgumentException("Key must be a string or Type");
}
if (managedDict != null && managedDict.ContainsKey(key))
{
return(true);
}
PresentationFrameworkCollection <ResourceDictionary> col = MergedDictionaries;
for (int i = col.Count - 1; i >= 0; i--)
{
ResourceDictionary rd = col[i];
if (rd.Contains(key))
{
return(true);
}
}
return(false);
}
internal override void AddStrongRef(IntPtr id, object value)
{
if (id == ResourceDictionary.MergedDictionariesProperty.Native)
{
mergedDictionaries = (PresentationFrameworkCollection <ResourceDictionary>)value;
}
else
{
base.AddStrongRef(id, value);
}
}
internal override void ClearStrongRef(IntPtr id, object value)
{
if (id == ResourceDictionary.MergedDictionariesProperty.Native)
{
mergedDictionaries = null;
}
else
{
base.ClearStrongRef(id, value);
}
}
public object this[object key] {
get {
if (!(key is string || key is Type))
{
throw new ArgumentException("Key must be a string or Type");
}
// check our cache
if (managedDict != null && managedDict.ContainsKey(key))
{
return(managedDict[key]);
}
// now iterate over the merged dictionaries
PresentationFrameworkCollection <ResourceDictionary> col = MergedDictionaries;
for (int i = col.Count - 1; i >= 0; i--)
{
ResourceDictionary rd = col[i];
if (rd.Contains(key))
{
return(rd[key]);
}
}
return(null);
}
set {
// this setter only permits string
// keys. since unmanaged needs to
// access them we send it along to
// unmanaged as well as update our
// cache.
var str_key = ToStringKey(key);
using (var val = Value.FromObject(value, true)) {
var v = val;
if (NativeMethods.resource_dictionary_set(native, str_key, ref v))
{
if (managedDict == null)
{
managedDict = new Dictionary <object, object> ();
}
managedDict.Add(str_key, value);
}
}
}
}
