public void AddUILayer(UILayer uiLayer)
{
if (!_allUILayers.ContainsKey(uiLayer.Key))
{
_allUILayers.Add(uiLayer.Key, uiLayer);
}
}
/**
* Recursively generates the UI structure and applies the UIConstraints and modifiers
*/
public void BuildComponent(UILayer layer, UIComponent node)
{
node.ParentLayer = layer;
node.Build(layer);
foreach (UIComponent childNode in node.Children)
{
BuildComponent(layer, childNode);
}
}
/**
* 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);
}
/**
* Recursive method to draw the UI
*/
private void RenderComponents(UIComponent node, SpriteBatch graphics, UILayer layer)
{
if (node == null || node.RenderAttributes.Width < 10 || node.RenderAttributes.Height < 10)
{
return;
}
if (node.RenderAttributes.Overflow == Overflow.Hide)
{
#region graphics.Begin()
//Stop global buffer
graphics.End();
//indicate how we are redrawing the text
RasterizerState r = new RasterizerState {
ScissorTestEnable = true
};
graphics.GraphicsDevice.ScissorRectangle = new Rectangle(node.RenderAttributes.X, node.RenderAttributes.Y, node.RenderAttributes.Width, node.RenderAttributes.Height);
//Start new special buffer
graphics.Begin(SpriteSortMode.Deferred, BlendState.AlphaBlend, SamplerState.PointClamp, DepthStencilState.None, r);
#endregion
}
node.Render(graphics, _contentManager);
#region Debug Border
if (layer.Debug)
{
graphics.DrawBorder(
new Rectangle(
node.RenderAttributes.X,
node.RenderAttributes.Y,
node.RenderAttributes.Width,
node.RenderAttributes.Height),
1,
Color.Black,
_contentManager.GetTexture("default"));
}
#endregion
#region Focus Border
if (node.Focused)
{
graphics.DrawBorder(
new Rectangle(
node.RenderAttributes.X,
node.RenderAttributes.Y,
node.RenderAttributes.Width,
node.RenderAttributes.Height),
3,
Color.Red,
_contentManager.GetTexture("default"));
}
#endregion
foreach (UIComponent childNode in node.Children)
{
RenderComponents(childNode, graphics, layer);
}
if (node.RenderAttributes.Overflow == Overflow.Hide)
{
#region graphics.End()
graphics.End();
graphics.Begin(SpriteSortMode.Deferred, BlendState.AlphaBlend, SamplerState.PointClamp, DepthStencilState.None, RasterizerState.CullCounterClockwise);
#endregion
}
}
