/// <inheritdoc />
public override void Initialize(LayoutElementsContainer layout)
{
// No support for different collections for now
if (HasDifferentValues || HasDifferentTypes)
{
return;
}
var type = Values.Type;
var size = Count;
var argTypes = type.GetGenericArguments();
var keyType = argTypes[0];
var valueType = argTypes[1];
_canEditKeys = keyType == typeof(string) || keyType.IsPrimitive || keyType.IsEnum;
_background = FlaxEngine.GUI.Style.Current.CollectionBackgroundColor;
_readOnly = false;
_notNullItems = false;
// Try get CollectionAttribute for collection editor meta
var attributes = Values.GetAttributes();
Type overrideEditorType = null;
float spacing = 0.0f;
var collection = (CollectionAttribute)attributes?.FirstOrDefault(x => x is CollectionAttribute);
if (collection != null)
{
_readOnly = collection.ReadOnly;
_notNullItems = collection.NotNullItems;
if (collection.BackgroundColor.HasValue)
{
_background = collection.BackgroundColor.Value;
}
overrideEditorType = TypeUtils.GetType(collection.OverrideEditorTypeName).Type;
spacing = collection.Spacing;
}
// Size
if (_readOnly || !_canEditKeys)
{
layout.Label("Size", size.ToString());
}
else
{
_size = layout.IntegerValue("Size");
_size.IntValue.MinValue = 0;
_size.IntValue.MaxValue = _notNullItems ? size : ushort.MaxValue;
_size.IntValue.Value = size;
_size.IntValue.ValueChanged += OnSizeChanged;
}
// Elements
if (size > 0)
{
var panel = layout.VerticalPanel();
panel.Panel.BackgroundColor = _background;
var keysEnumerable = ((IDictionary)Values[0]).Keys.OfType <object>();
var keys = keysEnumerable as object[] ?? keysEnumerable.ToArray();
var valuesType = new ScriptType(valueType);
// Use separate layout cells for each collection items to improve layout updates for them in separation
var useSharedLayout = valueType.IsPrimitive || valueType.IsEnum;
for (int i = 0; i < size; i++)
{
if (i != 0 && spacing > 0f)
{
if (panel.Children.Count > 0 && panel.Children[panel.Children.Count - 1] is PropertiesListElement propertiesListElement)
{
if (propertiesListElement.Labels.Count > 0)
{
var label = propertiesListElement.Labels[propertiesListElement.Labels.Count - 1];
var margin = label.Margin;
margin.Bottom += spacing;
label.Margin = margin;
}
propertiesListElement.Space(spacing);
}
else
{
panel.Space(spacing);
}
}
var key = keys.ElementAt(i);
var overrideEditor = overrideEditorType != null ? (CustomEditor)Activator.CreateInstance(overrideEditorType) : null;
var property = panel.AddPropertyItem(new DictionaryItemLabel(this, key));
var itemLayout = useSharedLayout ? (LayoutElementsContainer)property : property.VerticalPanel();
itemLayout.Object(new DictionaryValueContainer(valuesType, key, Values), overrideEditor);
}
}
_elementsCount = size;
// Add/Remove buttons
if (!_readOnly && _canEditKeys)
{
var area = layout.Space(20);
var addButton = new Button(area.ContainerControl.Width - (16 + 16 + 2 + 2), 2, 16, 16)
{
Text = "+",
TooltipText = "Add new item",
AnchorPreset = AnchorPresets.TopRight,
Parent = area.ContainerControl,
Enabled = !_notNullItems,
};
addButton.Clicked += () =>
{
if (IsSetBlocked)
{
return;
}
Resize(Count + 1);
};
var removeButton = new Button(addButton.Right + 2, addButton.Y, 16, 16)
{
Text = "-",
TooltipText = "Remove last item",
AnchorPreset = AnchorPresets.TopRight,
Parent = area.ContainerControl,
Enabled = size > 0,
};
removeButton.Clicked += () =>
{
if (IsSetBlocked)
{
return;
}
Resize(Count - 1);
};
}
}