Groogy

alias Vector4f32 = Boleite::Vector4f32
alias Vector2f32 = Boleite::Vector2f32

struct SimpleVertex < Boleite::Vertex
  @pos   = Vector4f32.zero
  @color = Vector4f32.zero
  @uv    = Vector2f32.zero

  def initialize
  end

Groogy

require "crystal-clear"

class FooBar
  invariants do
    @val != nil
  end

  def initialize(@val = nil)
    @val = 5
  end

Groogy

require "boleite"
require "./ego/*"
require "./ego/serializers/*"

app = EgoApplication.new # Inherits from Boleite::Application, defines how to get the configuration
app.state_stack.push GameState.new(app)
app.run

Groogy

class Page
  # ....
  private def render_glyph_to_texture(glyph, width, height) : Nil
    bitmap = @face.value.glyph.value.bitmap  
    buffer = Bytes.new bitmap.buffer, bitmap.width * bitmap.rows
    show_pixels bitmap.buffer, bitmap.width, bitmap.rows
    @texture.update(bitmap.buffer, bitmap.width, bitmap.rows, 0, 0, 8)
  end

  def show_pixels(pixels, width, height)

Groogy

font = Boleite::Font.new app.graphics, "/usr/share/fonts/TTF/arial.ttf"
text = Boleite::Text.new font, "Hello world?\nHello new line!"
text.size = 150u32
text.default_color = Boleite::Color.blue
text.position = Boleite::Vector2f.new 10.0, 10.0
text.formatter.add /(Hello)/, Boleite::Color.green
text.formatter.add /(\!|\?)/, Boleite::Color.black

renderer.draw text

Groogy

# Papierkorb suggestion
class Foo
  include CrystalClear
  
  requires var > 5
  ensures result.query?
  assert def foo # Apply contract semantics to method
    # Code
  end
  

Groogy

class Foo
  include CrystalClear
  
  def on_contract_fail(contract, condition, method) # some args with info
    # Default behaviour but you can overide it in this method
    raise CrystalClear::ContractError.new("Failed #{self.class} #{contract} contract: #{condition}"
  end
end

Groogy

abstract class Container < Widget
  includes CrystalClear
  
  @children = [] of Widget

  requires child.parent.nil?
  ensures @children.count child == 1
  def add(child)
    @children << child
    child.parent = self

Groogy

class Boleite::GUI
  abstract class Widget
    Cute.signal mouse_enter
    Cute.signal mouse_leave
    Cute.signal mouse_over(x : Float64, y : Float64)
    Cute.signal left_click(x : Float64, y : Float64)
    Cute.signal right_click(x : Float64, y : Float64)
    Cute.signal key_pressed
    Cute.signal key_released
    Cute.signal text_entered

Groogy

class WidgetInput < InputReceiver
  def initialize(widget)
    register WidgetLeftClick ->widget.left_click.emit
  end
end