Class: GSuper::SuperWindow

Inherits:
Gtk::Window
  • Object
show all
Includes:
Color
Defined in:
lib/gsuper/super_window.rb

Overview

字幕ウィンドウを表わすクラス。

Constant Summary collapse

BACKGROUND_COLOR = 
Color::gdk_color([0.0, 1.0, 0.0])
BACKGROUND_ALPHA = 
0.5

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Color

gdk_alpha, gdk_color, pango_quadruple, pango_triple

Constructor Details

#initialize ⇒ SuperWindow

Returns a new instance of SuperWindow.



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# File 'lib/gsuper/super_window.rb', line 13

def initialize
  super()

  @font_name = 'Sans Bold 24'
  @text_color = Color::gdk_color([1.0, 0.5, 0.0])
  @shadow_color = Color::gdk_color([0.0, 0.0, 1.0])
  @text = ""

  @interactive = true

  self.app_paintable = true

  signal_connect('expose-event') do
    if @interactive
      exposed_interactive
    else
      exposed_noninteractive
    end
  end

  self.events = Gdk::Event::BUTTON_PRESS_MASK |
                Gdk::Event::BUTTON_RELEASE_MASK |
                Gdk::Event::POINTER_MOTION_MASK

  signal_connect('screen-changed') do 
    screen_changed
  end

  signal_connect('configure-event') do
    # p :configure
    invalidate
    set_responsive(interactive?)
    # exposeを誘発するためにfalseを返す
    false
  end

  button_pressed = false
  press_point = nil
  move = nil
  signal_connect('button-press-event') do |_, ev_button|
    button_pressed = true
    w, h = size
    if ev_button.x.between?(w - 30, w - 1) &&
       ev_button.y.between?(h - 30, h - 1)
      move = false
      press_point = [(w - ev_button.x), (h - ev_button.y)]
    else
      move = true
      press_point = [ev_button.x, ev_button.y]
    end
    # p :press
  end

  signal_connect('button-release-event') do
    button_pressed = false
    press_point = nil
    move = nil
    # p :release
  end

  signal_connect('motion-notify-event') do |_, ev_motion|
    if interactive? && button_pressed
      if move
        move(ev_motion.x_root - press_point[0], ev_motion.y_root - press_point[1])
      else
        w = ev_motion.x + press_point[0]
        h = ev_motion.y + press_point[1]
        resize([w, 100].max, [h, 100].max)
        # invalidate
        # set_responsive(true)
      end
    end
    # p :pointer_motion
  end

  # self.decorated = false

  self.set_default_size(640,480)

  @alpha_supported = false
  screen_changed

  # GDK window を作る。
  realize

  window.override_redirect = true
  set_responsive(true)
end

Instance Attribute Details

#font_name ⇒ Object

Returns the value of attribute font_name.



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# File 'lib/gsuper/super_window.rb', line 11

def font_name
  @font_name
end

#shadow_color ⇒ Object

Returns the value of attribute shadow_color.



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# File 'lib/gsuper/super_window.rb', line 11

def shadow_color
  @shadow_color
end

#text ⇒ Object

Returns the value of attribute text.



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# File 'lib/gsuper/super_window.rb', line 11

def text
  @text
end

#text_color ⇒ Object

Returns the value of attribute text_color.



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# File 'lib/gsuper/super_window.rb', line 11

def text_color
  @text_color
end

Instance Method Details

#draw_text(cr) ⇒ Object 



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# File 'lib/gsuper/super_window.rb', line 169

def draw_text(cr)
  # p [:draw_text, font_name]
  desc = Pango::FontDescription.new(font_name)

  layout = create_pango_layout
  layout.width = size[0] * Pango::SCALE
  layout.font_description = desc
  layout.text = text

  offset = shadow_offset(desc)

  cr.move_to(offset, offset)
  cr.set_source_rgba(*pango_triple(@shadow_color), 1.0)
  cr.show_pango_layout(layout)

  cr.move_to(0, 0)
  cr.set_source_rgba(*pango_triple(@text_color), 1.0)
  cr.show_pango_layout(layout)
end

#exposed_interactive ⇒ Object 



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# File 'lib/gsuper/super_window.rb', line 124

def exposed_interactive
  cr = window.create_cairo_context 

  if @alpha_supported
    cr.set_source_rgba(*pango_triple(BACKGROUND_COLOR), BACKGROUND_ALPHA)
  else
    cr.set_source_rgb(*pango_triple(BACKGROUND_COLOR))
  end

  cr.set_operator(Cairo::OPERATOR_SOURCE)
  cr.paint

  draw_text(cr)

  cr.set_source_rgb(0.5, 0.5, 0.5)
  w, h = size
  cr.fill do
    cr.rectangle(w - 30, h - 3, w, h)
    cr.rectangle(w - 3, h - 30, w, h)
  end

  cr.destroy

  return false
end

#exposed_noninteractive ⇒ Object 



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# File 'lib/gsuper/super_window.rb', line 150

def exposed_noninteractive
  cr = window.create_cairo_context 

  if @alpha_supported
    cr.set_source_rgba(0.0, 0.0, 0.0, 0.0)
  else
    cr.set_source_rgb(0.0, 0.0, 0.0)
  end

  cr.set_operator(Cairo::OPERATOR_SOURCE)
  cr.paint

  draw_text(cr)

  cr.destroy

  return false
end

#interactive=(flag) ⇒ Object 



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# File 'lib/gsuper/super_window.rb', line 207

def interactive=(flag)
  @interactive = flag
  set_responsive(flag)
  invalidate
end

#interactive? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/gsuper/super_window.rb', line 203

def interactive?
  @interactive
end

#invalidate ⇒ Object 



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# File 'lib/gsuper/super_window.rb', line 223

def invalidate
  window.invalidate(window.clip_region, true)
  window.process_updates(true)
end

#pt_to_px(point, dpi) ⇒ Object 



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# File 'lib/gsuper/super_window.rb', line 199

def pt_to_px(point, dpi)
  point / 72.0 * dpi
end

#screen_changed ⇒ Object 



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# File 'lib/gsuper/super_window.rb', line 228

def screen_changed
  colormap = self.screen.rgba_colormap
  if colormap
    # puts 'alpha channel supported'
    @alpha_supported = true
    self.colormap = colormap
  else
    STDERR.puts 'Warning: alpha channel NOT supported'
    @alpha_supported = false
    self.colormap = self.screen.rgb_colormap
  end
end

#set_responsive(responsive) ⇒ Object 



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# File 'lib/gsuper/super_window.rb', line 213

def set_responsive(responsive)
  if responsive
    width, height = size
    region = Gdk::Region.new(Gdk::Rectangle.new(0, 0, width, height))
  else
    region = Gdk::Region.new(Gdk::Rectangle.new(0, 0, 0, 0))
  end
  window.input_shape_combine_region(region, 0, 0)
end

#shadow_offset(desc) ⇒ Object

右下に二度打ちで「影」を落とす。そのオフセットは線の太さの半分にし たいとする。

Raises:

  • (TypeError) 


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# File 'lib/gsuper/super_window.rb', line 191

def shadow_offset(desc)
  raise TypeError unless desc.is_a? Pango::FontDescription
  dpi = window.screen.resolution

  font_px = pt_to_px(desc.size.fdiv(Pango::SCALE), dpi)
  return ( font_px * (1/12.0) * (desc.weight.to_i / 400.0) * (1/3.0) ).round
end