protected override void NotifyLayoutChanged(PropertyChange change)
{
if (IsActive)
{
base.NotifyLayoutChanged(change);
}
}
protected bool SetPropertyValue <T>(ref T property, T value, [CallerMemberName] string propertyName = null)
{
if (!EqualityComparer <T> .Default.Equals(property, value))
{
var propChange = new PropertyChange(this, propertyName, property, value);
property = value;
NotifyLayoutChanged(propChange);
return(true);
}
return(false);
}
protected bool SetFieldValue <T>(ref T[] field, int index, T value, string fieldName)
{
if (!EqualityComparer <T> .Default.Equals(field[index], value))
{
var propChange = new PropertyChange(this, fieldName, index, field[index], value, true);
field[index] = value;
NotifyLayoutChanged(propChange);
return(true);
}
return(false);
}
protected virtual void NotifyLayoutChanged(PropertyChange change)
{
Layout?.NotifyLayoutChanged(change);
}
//TODO: move code into each Change type class and clean-up the structure
private void ApplyPropertyChange(PropertyChange propChange, bool setNewValue)
{
var ownerType = propChange.Component?.GetType() ?? GetType();
var ownerObject = (object)propChange.Component ?? this;
var valueToSet = setNewValue ? propChange.NewValue : propChange.OldValue;
if (propChange.IsField)
{
var fi = ownerType.GetField(propChange.Property,
BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
if (propChange.Index.HasValue)
{
var arrayValue = (IList)fi.GetValue(ownerObject);
arrayValue[propChange.Index.Value] = valueToSet;
}
else
{
fi.SetValue(ownerObject, valueToSet);
}
if (ownerObject is LayoutComponent component)
{
component.OnSetFieldValue(propChange.Name, fi.GetValue(ownerObject), propChange.Index, valueToSet);
}
NotifyLayoutChanged(new PropertyChange(propChange.Component, propChange.Property,
setNewValue ? propChange.OldValue : propChange.NewValue,
setNewValue ? propChange.NewValue : propChange.OldValue,
true));
}
else
{
PropertyInfo pi = null;
bool isSubProperty = false;
if (propChange.Property.Contains("."))
{
string[] propNames = propChange.Property.Split('.');
pi = ownerType.GetProperty(propNames[0]);
ownerObject = pi.GetValue(ownerObject);
ownerType = ownerObject.GetType();
pi = ownerType.GetProperty(propNames[1]);
isSubProperty = true;
}
else
{
pi = ownerType.GetProperty(propChange.Property);
}
pi.SetValue(ownerObject, valueToSet);
if (isSubProperty)
{
NotifyLayoutChanged(new PropertyChange(propChange.Component,
propChange.Property, propChange.Index,
propChange.NewValue, propChange.OldValue,
propChange.IsField));
}
}
}
