Class: GlimR::Label

Inherits:
Image show all
Defined in:
lib/glimr/widgets/label.rb

Direct Known Subclasses

TextInput

Constant Summary

Constants included from Layoutable

GlimR::Layoutable::DIMENSIONS

Instance Attribute Summary

Attributes inherited from Image

#bound, #image

Attributes inherited from Widget

#focused, #hover

Attributes included from Layoutable

#align, #valign

Attributes inherited from Model

#geometry, #material, #shader, #texture, #transform

Attributes inherited from SceneObject

#children, #drawables, #mtime, #parent, #viewport

Attributes included from EventListener

#event_listeners, #listener_count

Instance Method Summary collapse

Methods inherited from Image

#create_colors, #create_normals, #create_texcoords, #create_vertices, #load, load, load_theme, #load_theme, #texture=, #update_geometry

Methods inherited from Widget

#activate, #blur, #click, #focus, for, #key_down, #key_up, #lock, #mouse_down, #mouse_move, #mouse_out, #mouse_over, #mouse_up, #unlock

Methods included from Layoutable

#attach, #children_change, #constant_size?, #detach, #expand!, #expand?, #expand_height, #expand_to_max_height!, #expand_to_max_width!, #expand_width, #fit_height!, #fit_to_children!, #fit_width!, #free_height, #free_width, #full_depth, #full_height, #full_width, #inner_depth, #inner_height, #inner_width, #inspect, #layout, #layoutable_children, #margin, #margin=, #max_height=, #max_width=, #min_height=, #min_width=, #padding, #padding=, #parent=, #size_changing, size_changing_accessor, #tell_children_of_size_change, #x=, #y=

Methods inherited from Model

#absolute_transform, #apply, #inspect, #pop_state, #push_state

Methods inherited from SceneObject

#<<, #absolute_geometry, #absolute_material, #absolute_shader, #absolute_texture, #absolute_transform, #absolute_transform_for_drawing, #add_drawables, #apply, #attach, #clone, #detach, #detach_self, #inspect, #pop_state, #push_state, #remove_drawables, #render, #replace_node, #root, #touch!, #visible

Methods included from EventListener

#add_event_listener, #decrement_listener_count, #dispatch_event, #event_root, #increment_listener_count, #method_missing, #multicast_event, #process_event, #remove_event_listener

Constructor Details

#initialize(a, &b) ⇒ Label

Returns a new instance of Label.



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# File 'lib/glimr/widgets/label.rb', line 34

def initialize(a,&b)
  txt = a[:text]
  a.delete(:text)
  super(a, &b)
  self.text = txt if txt
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class GlimR::EventListener

Instance Method Details

#as_alpha(pixels, alpha) ⇒ Object 



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# File 'lib/glimr/widgets/label.rb', line 109

def as_alpha(pixels, alpha)
  i = 3
  while i < pixels.size
    pixels[i] = alpha[i-1]
    i += 4
  end
  pixels
end

#default_config ⇒ Object 



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# File 'lib/glimr/widgets/label.rb', line 23

def default_config
  super.merge(
    :valign => :center,
    :align => :center,
    :font => GlimR.label_font,
    :size => GlimR.label_size,
    :width => 0, :height => 0,
    :color => GlimR.label_color
  )
end

#text=(t) ⇒ Object 



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# File 'lib/glimr/widgets/label.rb', line 41

def text= t
  @text = t.to_s
  lines = @text.split("\n")
  w,h = 0,0
 if false and MAC_OS_X
  cr = Cairo::Context.new(
    Cairo::ImageSurface.new(Cairo::FORMAT_ARGB32,0,0))
  cr.select_font_face(font, 
    Cairo::FONT_SLANT_NORMAL, 
    Cairo::FONT_WEIGHT_NORMAL)
  cr.font_size = size
  lines.each{|line|
    nw = cr.text_extents(line).x_advance
    w = nw.to_i if nw > w
  }
  h = (lines.size * (size+1)).to_i
  px = "\000"*(w*h*4)
  surf = Cairo::ImageSurface.new(
    px, Cairo::FORMAT_ARGB32, w,h, w*4)
  cr = Cairo::Context.new surf
  cr.set_source_rgba *color
  lines.each_with_index{|line,i|
    cr.save
      cr.show_text(line)
    cr.restore
    cr.rel_move_to(0, size+1)
  }
 else
  sdl_font = SDL::TTF.open(font, size)
  lines.each{|line|
    nw,nh = sdl_font.text_size(line)
    w = nw if nw > w
  }
  h = lines.size * (sdl_font.line_skip+1)
  rmask = 0xff000000
  gmask = 0x00ff0000
  bmask = 0x0000ff00
  amask = 0x000000ff
  mask = SDL::Surface.new(
      SDL::SWSURFACE|SDL::SRCALPHA,
      w, h, 32,
      amask,bmask,gmask,rmask)
  mask.fill_rect(0,0, w,h, [0,0,0,255])
  lines.each_with_index{|line,i|
    sdl_font.draw_blended_utf8(
      mask, line,
      0, i*(sdl_font.line_skip+1),
      255, 255, 255
    )
  }
  image = SDL::Surface.new(
      SDL::SWSURFACE|SDL::SRCALPHA,
      w, h, 32,
      amask,bmask,gmask,rmask)
  image.fill_rect(0,0,w,h, color.map{|i|(i*255).to_i})
  px = as_alpha(image.pixels, mask.pixels)
 end

  texture.width = w
  texture.height = h
  texture.mode = TEXTURE_2D
  texture.pixels = px
  @width = texture.width
  @height = texture.height
  @bound = texture.bound
  update_geometry
end