Class: GlimR::TextInput

Inherits:
Label show all
Defined in:
lib/glimr/widgets/text_editor.rb

Overview

TextInput is a single-line text input widget.

Constant Summary collapse

@@xsel = 
false

Constants included from Layoutable

Layoutable::DIMENSIONS

Instance Attribute Summary collapse

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, #focus, for, #key_down, #lock, #mouse_out, #mouse_over, #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, #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) ⇒ TextInput

Returns a new instance of TextInput.



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# File 'lib/glimr/widgets/text_editor.rb', line 68

def initialize(*a,&b)
  if a[0]
    txt = a[0][:text]
    a[0].delete(:text)
  end
  super(*a, &nil)
  @texture.pixels = "\000" * (@width*@height*4)
  @texture.width = @width
  @texture.height = @height
  @bound = @texture.bound
  update_geometry
  if a[0]
    self.text = txt if txt
  end
  @cursor.height = @height - 2
  @cursor.y = 1
  @cursor.z = -0.1
  attach @cursor
  @background.set_dimensions(@width, @height)
  @background.z = -0.2
  attach @background
  if block_given?
    self.submit_handler = b
  end
end

Dynamic Method Handling

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

Instance Attribute Details

#cursor_position ⇒ Object

Returns the value of attribute cursor_position.



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# File 'lib/glimr/widgets/text_editor.rb', line 48

def cursor_position
  @cursor_position
end

#scroll_x ⇒ Object

Returns the value of attribute scroll_x.



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# File 'lib/glimr/widgets/text_editor.rb', line 46

def scroll_x
  @scroll_x
end

#scroll_y ⇒ Object (readonly)

Returns the value of attribute scroll_y.



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# File 'lib/glimr/widgets/text_editor.rb', line 46

def scroll_y
  @scroll_y
end

#selection_end ⇒ Object

Returns the value of attribute selection_end.



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# File 'lib/glimr/widgets/text_editor.rb', line 48

def selection_end
  @selection_end
end

#selection_start ⇒ Object

Returns the value of attribute selection_start.



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# File 'lib/glimr/widgets/text_editor.rb', line 48

def selection_start
  @selection_start
end

#submit_handler ⇒ Object

Returns the value of attribute submit_handler.



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# File 'lib/glimr/widgets/text_editor.rb', line 49

def submit_handler
  @submit_handler
end

Instance Method Details

#as_alpha(pixels, alpha) ⇒ Object 



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# File 'lib/glimr/widgets/text_editor.rb', line 330

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

#change! ⇒ Object 



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# File 'lib/glimr/widgets/text_editor.rb', line 251

def change!
  dispatch_event(Event.new(:change, :text => @text))
  update_on_frame
end

#clear_selection(new_cursor_position = [@selection_start, @selection_end].min) ⇒ Object 



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# File 'lib/glimr/widgets/text_editor.rb', line 226

def clear_selection(new_cursor_position=[@selection_start, @selection_end].min)
  @selecting = false
  @text_selected = false
  @cursor.use_normal
  self.cursor_position = new_cursor_position
end

#click(o, e) ⇒ Object 



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# File 'lib/glimr/widgets/text_editor.rb', line 161

def click(o,e)
  if e.button == :left
    clear_selection if @text_selected
    self.cursor_position = cursor_position_closest_to(e.rx, e.ry)
  elsif e.button == :middle and @@xsel
    x_sel = IO.popen("#@@xsel -o", "r"){|f| f.read }
    replace_selection_with x_sel
    @cursor_position += x_sel.size
  end
end

#cursor_position_closest_to(cx, cy) ⇒ Object 



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# File 'lib/glimr/widgets/text_editor.rb', line 233

def cursor_position_closest_to(cx,cy)
  index = nil
  @text_offsets.each_with_index{|(x,y), i|
    if x + scroll_x > cx
      index = [i-1, 0].max
      break
    end
  }
  index ||= @text.size
  index
end

#default_config ⇒ Object 



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# File 'lib/glimr/widgets/text_editor.rb', line 51

def default_config
  super.merge(
    :fit_children => false,
    :align => :left,
    :text => "",
    :width => 150,
    :height => 16,
    :scroll_x => 0,
    :scroll_y => 0,
    :background => StretchableImage.load_theme("text_input_bg.png"),
    :cursor => TextCursor.new,
    :cursor_position => 0,
    :selection_start => 0,
    :selection_end => 0
  )
end

#draw_text(x_offset = @scroll_x, y_offset = @scroll_y) ⇒ Object 



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# File 'lib/glimr/widgets/text_editor.rb', line 304

def draw_text x_offset=@scroll_x, y_offset=@scroll_y
  GC.disable
  w,h = @width, @height
  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])
  @sdl_font.draw_blended_utf8(
    mask, text,
    x_offset, y_offset,
    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})
  texture.pixels = as_alpha(image.pixels, mask.pixels)
  GC.enable
end

#key_up(o, e) ⇒ Object 



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# File 'lib/glimr/widgets/text_editor.rb', line 100

def key_up(o,e)
  return unless focused
  case e.key
  when :left
    clear_selection if @text_selected
    self.cursor_position -= 1
  when :right
    clear_selection if @text_selected
    self.cursor_position += 1
  when 8 # backspace
    if @text_selected
      replace_selection_with ""
    elsif self.cursor_position > 0
      @text[self.cursor_position-1] = ""
      self.text = @text
      @cursor_position -= 1
    end
  when 127 # delete
    if @text_selected
      replace_selection_with ""
    elsif self.cursor_position < @text.size
      @text[self.cursor_position] = ""
      self.text = @text
    end
  when 13 # enter
    submit
  else
    if @text_selected
      replace_selection_with e.key.chr
      cp = [@selection_start, @selection_end].min
    else
      cp = self.cursor_position
      @text.insert(cp, e.key.chr)
      self.text = @text
    end
    @cursor_position = cp + 1
  end
end

#layout ⇒ Object 



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# File 'lib/glimr/widgets/text_editor.rb', line 280

def layout
end

#mouse_down(o, e) ⇒ Object 



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# File 'lib/glimr/widgets/text_editor.rb', line 172

def mouse_down(o,e)
  if e.button == :left
    @sx, @sy = e.rx, e.ry
    @selection_start = @selection_end = cursor_position_closest_to(@sx, @sy)
  end
  super
end

#mouse_move(o, e) ⇒ Object 



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# File 'lib/glimr/widgets/text_editor.rb', line 190

def mouse_move(o,e)
  if @sx and @sy
    @selecting = true
    @sx += e.dx
    @sy += e.dy
    @selection_end = cursor_position_closest_to(@sx, @sy)
    update_selection
  end
end

#mouse_up(o, e) ⇒ Object 



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# File 'lib/glimr/widgets/text_editor.rb', line 180

def mouse_up(o,e)
  super unless @selecting
  if e.button == :left and @selecting
    @selecting = false
    @selection_end = cursor_position_closest_to(@sx, @sy)
    update_selection
  end
  @sx = @sy = false
end

#replace_selection_with(str) ⇒ Object 



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# File 'lib/glimr/widgets/text_editor.rb', line 143

def replace_selection_with str
  @text[selection_range] = str
  clear_selection
  self.text = @text
end

#selection ⇒ Object 



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# File 'lib/glimr/widgets/text_editor.rb', line 157

def selection
  @text[selection_range]
end

#selection_range ⇒ Object 



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# File 'lib/glimr/widgets/text_editor.rb', line 149

def selection_range
  if @selection_start > @selection_end
    (@selection_end...@selection_start) # up until selection start
  else
    (@selection_start..@selection_end)
  end
end

#submit ⇒ Object 



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# File 'lib/glimr/widgets/text_editor.rb', line 139

def submit
  dispatch_event(Event.new(:submit, :text => @text))
end

#text=(text) ⇒ Object 



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# File 'lib/glimr/widgets/text_editor.rb', line 245

def text= text
  @text = text
  @text_changed = true
  change!
end

#update_on_frame ⇒ Object 



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# File 'lib/glimr/widgets/text_editor.rb', line 256

def update_on_frame
  if not @updater
    @updater = on_frame(:update_text)
  end
end

#update_selection ⇒ Object 



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# File 'lib/glimr/widgets/text_editor.rb', line 200

def update_selection
  if @@xsel
    IO.popen("#@@xsel -i", "w"){|f| f.write selection }
  end
  ss = @text_offsets[@selection_start][0]
  se = @text_offsets[@selection_end][0]
  d = se - ss
  self.cursor_position = @selection_end
  ex = @cursor.x
  ew = @cursor.width
  if d > 0 # end is after beginning
    @cursor.x = [0, ex - d].max # ex - d is first character x of selection
    @cursor.width = ex + ew - @cursor.x # width is distance from right side of end char to current cursor.x
  else # end is before beginning
    # cursor.x is where it should be, width is -d
    @cursor.x = ex
    @cursor.width = [@width - ex, -d].min
  end
  @cursor.use_insert
  @text_selected = true
  dispatch_event(
    Event.new(
      :select, :selection => selection,
      :start => @selection_start, :end => @selection_end))
end

#update_text(o, e) ⇒ Object 



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# File 'lib/glimr/widgets/text_editor.rb', line 283

def update_text(o,e)
  if @text_changed
    @text_offsets = false
    @text_changed = false
  end
  update_text_offsets
  self.cursor_position = self.cursor_position
  update_selection if @selecting
  draw_text
  touch!
  remove_event_listener(:frame, @updater)
  @updater = false
end

#update_text_offsets ⇒ Object 



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# File 'lib/glimr/widgets/text_editor.rb', line 297

def update_text_offsets
  @sdl_font = SDL::TTF.open(font, size)
  @text_offsets ||= (0..text.size).map{|i|
    @sdl_font.text_size(text[0,i])
  }
end