Class: Hokusai::Blocks::Label

Inherits:
Hokusai::Block show all
Defined in:
ui/src/hokusai/blocks/label.rb

Instance Attribute Summary

Attributes inherited from Hokusai::Block

#node, #provides, #publisher

Instance Method Summary collapse

Methods inherited from Hokusai::Block

#children, #children?, compile, computed, computed!, #draw, #draw_with, #dump, #emit, inject, inject!, #method_missing, mount, #on_resize, provide, provides, style, styles_get, template, template_from_file, template_get, #update, use, uses

Constructor Details

#initialize(**args) ⇒ Label

Returns a new instance of Label.



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# File 'ui/src/hokusai/blocks/label.rb', line 14

def initialize(**args)
  @content_width = 0.0
  @content_height = 0.0
  @updated = false
  @last_content = nil

  super(**args)
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class Hokusai::Block

Instance Method Details

#render(canvas) ⇒ Object 



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# File 'ui/src/hokusai/blocks/label.rb', line 23

def render(canvas)
  if @last_content != content
    width, height = Hokusai.fonts.active.measure(content.to_s, size.to_i)
    node.meta.set_prop(:width, width + padding.right + padding.left)
    node.meta.set_prop(:height, height + padding.top + padding.bottom)
    emit("width_updated", width + padding.right + padding.left)

    @last_content = content
  end

  draw do
    text(content, canvas.x, canvas.y) do |command|
      command.color = color
      command.size = size
      command.padding = padding
      command.font = font unless font.nil?
    end
  end
end