/**
* This methods takes a attribute object and overrides styles that
* are present and not null. All properties are null by default and
* will only be cascaded if is present
*/
public UIAttributes CascadeAttributes(UIAttributes cascadingAttributes)
{
return(new UIAttributes
{
TextureKey = cascadingAttributes.TextureKey ?? TextureKey,
FontKey = cascadingAttributes.FontKey ?? FontKey,
// ReSharper disable once CompareOfFloatsByEqualityOperator
FontSize = cascadingAttributes.FontSize != 1f ? cascadingAttributes.FontSize : FontSize,
X = cascadingAttributes.X != 0 ? cascadingAttributes.X : X,
Y = cascadingAttributes.Y != 0 ? cascadingAttributes.Y : Y,
OffsetX = cascadingAttributes.OffsetX != 0 ? cascadingAttributes.OffsetX : OffsetX,
OffsetY = cascadingAttributes.OffsetY != 0 ? cascadingAttributes.OffsetY : OffsetY,
Width = cascadingAttributes.Width != 0 ? cascadingAttributes.Width : Width,
Height = cascadingAttributes.Height != 0 ? cascadingAttributes.Height : Height,
Color = cascadingAttributes.Color != Color.Black ? cascadingAttributes.Color : Color,
Background = cascadingAttributes.Background != Color.Transparent ? cascadingAttributes.Background : Background,
Grow = cascadingAttributes.Grow != 1 ? cascadingAttributes.Grow : Grow,
BorderSize = cascadingAttributes.BorderSize != 0 ? cascadingAttributes.BorderSize : BorderSize,
BorderColor = cascadingAttributes.BorderColor != Color.Black ? cascadingAttributes.BorderColor : BorderColor,
Position = cascadingAttributes.Position != Position.Relative ? cascadingAttributes.Position : Position,
Sizing = cascadingAttributes.Sizing != Sizing.Proportion ? cascadingAttributes.Sizing : Sizing,
Overflow = cascadingAttributes.Overflow != Overflow.Show ? cascadingAttributes.Overflow : Overflow,
JustifyText = cascadingAttributes.JustifyText != JustifyText.Center ? cascadingAttributes.JustifyText : JustifyText,
VerticalAlignText = cascadingAttributes.VerticalAlignText != VerticalAlignText.Center ? cascadingAttributes.VerticalAlignText : VerticalAlignText,
TextWrap = cascadingAttributes.TextWrap != TextWrap.Wrap ? cascadingAttributes.TextWrap : TextWrap,
FontScaleMode = cascadingAttributes.FontScaleMode != FontScaleMode.FontSizeScale ? cascadingAttributes.FontScaleMode : FontScaleMode,
StackDirection = cascadingAttributes.StackDirection != StackDirection.None ? cascadingAttributes.StackDirection : StackDirection,
});
}
protected UIComponent(string name, bool updateable = false)
{
//Component name
Name = name;
//Indexing for drawing children
Index = 0;
NextChildIndex = 0;
//Parent and children
Parent = null;
Children = new List <UIComponent>();
//UIConstraints and attributes
Constraints = new List <UIConstraint>();
DefaultAttributes = new UIAttributes
{
TextureKey = "default",
FontKey = "default",
Grow = 1,
FontSize = 1,
Background = Color.Transparent,
Color = Color.Black,
Position = Position.Relative
};
RenderAttributes = new UIAttributes();
//Events and focus
Focusable = false;
Updateable = updateable;
EventHandlers = new Dictionary <string, Action <UIEvent> >();
}
/**
* Used to generate a UIComponent making use of all applied constraints and modifiers.
* Modifiers and constraints are applied in the same order as they are defined
*/
public void Build(UILayer layer)
{
#region Inherit/Defaults
DefaultAttributes.X = Parent?.DefaultAttributes.X ?? 0;
DefaultAttributes.Y = Parent?.DefaultAttributes.Y ?? 0;
DefaultAttributes.Width = Parent?.DefaultAttributes.Width ?? DefaultAttributes.Width;
DefaultAttributes.Height = Parent?.DefaultAttributes.Height ?? DefaultAttributes.Height;
if (DefaultAttributes.StackDirection == StackDirection.Inherit)
{
DefaultAttributes.StackDirection = Parent?.DefaultAttributes.StackDirection ?? StackDirection.None;
}
if (DefaultAttributes.Overflow == Overflow.Inherit)
{
DefaultAttributes.Overflow = Parent?.DefaultAttributes.Overflow ?? Overflow.Show;
}
if (DefaultAttributes.Sizing == Sizing.Inherit)
{
DefaultAttributes.Sizing = Parent?.DefaultAttributes.Sizing ?? Sizing.Proportion;
}
if (DefaultAttributes.Position == Position.Inherit)
{
DefaultAttributes.Position = Parent?.DefaultAttributes.Position ?? Position.Relative;
}
if (DefaultAttributes.JustifyText == JustifyText.Inherit)
{
DefaultAttributes.JustifyText = Parent?.DefaultAttributes.JustifyText ?? JustifyText.Start;
}
if (DefaultAttributes.TextWrap == TextWrap.Inherit)
{
DefaultAttributes.TextWrap = Parent?.DefaultAttributes.TextWrap ?? TextWrap.Wrap;
}
if (DefaultAttributes.FontScaleMode == FontScaleMode.Inherit)
{
DefaultAttributes.FontScaleMode = Parent?.DefaultAttributes.FontScaleMode ?? FontScaleMode.FontSizeScale;
}
if (DefaultAttributes.VerticalAlignText == VerticalAlignText.Inherit)
{
DefaultAttributes.VerticalAlignText = Parent?.DefaultAttributes.VerticalAlignText ?? VerticalAlignText.Start;
}
#endregion
#region Apply Contraints/ Build Indexes
if (EventHandlers.Any())
{
layer.AddEventComponent(this);
}
if (Focusable)
{
layer.AddTabIndexComponent(this);
}
if (Updateable)
{
layer.AddUpdateIndexComponent(this);
}
#endregion
//If the parent node is null then we stop here
if (Parent != null)
{
if (Parent.DefaultAttributes.Sizing == Sizing.Proportion)
{
#region Proportional Container Positioning
int totalProportionNumber = Parent.Children.Sum(x => x.DefaultAttributes.Grow);
int leadingProportionNumber = Parent.Children.TakeWhile(child => child.Index != Index).Sum(x => x.DefaultAttributes.Grow);
//Correctly render in the correct stack direction
switch (Parent.DefaultAttributes.StackDirection)
{
case StackDirection.Horizontal:
int oneProportionWidth = DefaultAttributes.Width / totalProportionNumber;
DefaultAttributes.X += leadingProportionNumber * oneProportionWidth;
DefaultAttributes.OffsetX = leadingProportionNumber * oneProportionWidth;
DefaultAttributes.Width = oneProportionWidth * DefaultAttributes.Grow;
break;
case StackDirection.Vertical:
int oneProportionHeight = DefaultAttributes.Height / totalProportionNumber;
DefaultAttributes.Y += leadingProportionNumber * oneProportionHeight;
DefaultAttributes.OffsetY = leadingProportionNumber * oneProportionHeight;
DefaultAttributes.Height = oneProportionHeight * DefaultAttributes.Grow;
break;
}
#endregion
}
else if (Parent.DefaultAttributes.Sizing == Sizing.Dimension)
{
#region Dimensional Container Positioning
switch (Parent.DefaultAttributes.StackDirection)
{
case StackDirection.Horizontal:
int nextWidth = Index * Parent.Children[0].DefaultAttributes.Width;
DefaultAttributes.X += nextWidth;
DefaultAttributes.OffsetX = nextWidth;
break;
case StackDirection.Vertical:
int nextHeight = Index * Parent.Children[0].DefaultAttributes.Height;
DefaultAttributes.Y += nextHeight;
DefaultAttributes.OffsetY = nextHeight;
break;
}
#endregion
}
}
foreach (UIConstraint uiConstraint in Constraints)
{
uiConstraint.Apply(this);
}
RenderAttributes = DefaultAttributes.CascadeAttributes(DefaultAttributes);
}
