Glimmer DSL for LibUI 0.5.10 - Shape Listeners

Glimmer DSL for LibUI 0.5.10 (Fukuoka Award Winning Ruby Desktop Development GUI Library) has just been released with the following changes:

Support nesting area mouse listeners underneath shapes directly given the newly added support for the include?(x, y) method, which can be used to detect if a mouse event fired for a specific shape
examples/shape_coloring.rb
In summary, you can now use area mouse listeners within shapes directly and Glimmer DSL for LibUI will ensure that they do not fire unless the mouse x,y coordinates land within the shape regions (it does so by leveraging the Perfect Shape gem)

In fact, that has been demonstrated in the new example: Shape Coloring

# From: https://github.com/AndyObtiva/glimmer-dsl-libui#shape-coloring

require 'glimmer-dsl-libui'

class ShapeColoring
  include Glimmer::LibUI::Application

  COLOR_SELECTION = Glimmer::LibUI.interpret_color(:red)

  before_body {
    @shapes = []
  }

  body {
    window('Shape Coloring', 200, 200) {
      margined false

      grid {
        label("Click a shape to select and\nchange color via color button") {
          left 0
          top 0
          hexpand true
          halign :center
          vexpand false
        }

        color_button { |cb|
          left 0
          top 1
          hexpand true
          vexpand false

          on_changed do
            @selected_shape&.fill = cb.color
          end
        }

        area {
          left 0
          top 2
          hexpand true
          vexpand true

          rectangle(0, 0, 600, 400) { # background shape
            fill :white
          }

          @shapes << colorable(:rectangle, 20, 20, 40, 20) { |shape|
            fill :lime
          }

          @shapes << colorable(:square, 80, 20, 20) { |shape|
            fill :blue
          }

          @shapes << colorable(:circle, 75, 70, 20, 20) { |shape|
            fill :green
          }

          @shapes << colorable(:arc, 120, 70, 40, 0, 145) { |shape|
            fill :orange
          }

          @shapes << colorable(:polygon, 120, 10, 120, 50, 150, 10, 150, 50) {
            fill :cyan
          }

          @shapes << colorable(:polybezier, 20, 40,
                     30, 100, 50, 80, 80, 110,
                     40, 120, 20, 120, 30, 91) {
            fill :pink
          }
        }
      }
    }
  }

  def colorable(shape_symbol, *args, &content)
    send(shape_symbol, *args) do |shape|
      on_mouse_up do |area_mouse_event|
        old_stroke = Glimmer::LibUI.interpret_color(shape.stroke).slice(:r, :g, :b)
        @shapes.each {|sh| sh.stroke = nil}
        @selected_shape = nil
        unless old_stroke == COLOR_SELECTION
          shape.stroke = COLOR_SELECTION.merge(thickness: 2)
          @selected_shape = shape
        end
      end

      content.call(shape)
    end
  end
end

ShapeColoring.launch

Happy Glimmering!

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Glimmer DSL for LibUI 0.5.10 - Shape Listeners

Andy Maleh

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