Class: Nyle::Screen

Inherits:
Gtk::DrawingArea
  • Object
show all
Defined in:
lib/nyle/screen.rb

Overview

Screen

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(width = DEFAULT_WIDTH, height = DEFAULT_HEIGHT, bgcolor: :WHITE, trace: false) ⇒ Screen

Returns a new instance of Screen.



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# File 'lib/nyle/screen.rb', line 17

def initialize(width = DEFAULT_WIDTH, height = DEFAULT_HEIGHT, bgcolor: :WHITE, trace: false)
  super()
  @width         = width
  @height        = height
  @trace         = trace
  @bgcolor       = bgcolor
  @running_count = 0
  @status        = nil

  Nyle.module_eval {
    _set_screen_size(width, height)
  }

  # Draw to 'CairoContext' of ImageSurface once, and copy to 'CairoContext' of DrawingArea
  @canvas = Cairo::ImageSurface.new(@width, @height)

  self.signal_connect(:configure_event) do |widget, event|
    ;   # For resizing and so on
  end

  self.signal_connect(:draw) do |widget, cairo_context|
    Nyle.module_eval {
      _update_mouse_state
      _update_key_state
    }
    # Draw to 'CairoContext' of ImageSurface
    Cairo::Context.new(@canvas) do |cr|
      Nyle.module_eval {
        _set_cr(cr)
      }
      unless @trace                       # If not trace, clear screen each time
        Nyle.save do
          Nyle.cr.set_operator(Cairo::Operator::CLEAR)
          Nyle.cr.paint
        end
      end
      update
      draw
    end
    # Copy to 'CairoContext' of DrawingArea
    Nyle.module_eval {
      _set_cr(cairo_context)
    }
    Nyle.cr.set_source_color(@bgcolor)
    Nyle.cr.paint
    Nyle.cr.set_source(@canvas, 0, 0)
    Nyle.cr.paint
    @running_count += 1
  end

  # Need not only :pointer_motion but also :button_press and :button_release
  self.add_events([:button_press_mask,
                   :button_release_mask,
                   :pointer_motion_mask])

  # Signal handler for mouse position
  self.signal_connect(:motion_notify_event) do |widget, event|
    Nyle.module_eval {
      _set_mouse_pos(event.x.to_i, event.y.to_i)
    }
    false
  end
end

Instance Attribute Details

#height ⇒ Object (readonly)

Returns the value of attribute height.



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# File 'lib/nyle/screen.rb', line 16

def height
  @height
end

#status ⇒ Object (readonly)

Returns the value of attribute status.



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# File 'lib/nyle/screen.rb', line 16

def status
  @status
end

#width ⇒ Object (readonly)

Returns the value of attribute width.



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# File 'lib/nyle/screen.rb', line 16

def width
  @width
end

Instance Method Details

#clear_screen ⇒ Object

Clear



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# File 'lib/nyle/screen.rb', line 82

def clear_screen
  Nyle.cr.set_operator(Cairo::Operator::CLEAR)
  Nyle.cr.paint
end

#draw ⇒ Object 



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# File 'lib/nyle/screen.rb', line 105

def draw    ; end

#resume ⇒ Object 



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# File 'lib/nyle/screen.rb', line 107

def resume  ; end

#setup ⇒ Object 



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# File 'lib/nyle/screen.rb', line 108

def setup   ; end

#show_all(title: nil, interval: nil) ⇒ Object

When single screen, create frame to show self



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# File 'lib/nyle/screen.rb', line 88

def show_all(title: nil, interval: nil)
  f = Nyle::Frame.new(@width, @height)
  f.set_current(self)
  f.show_all({title: title, interval: interval})
  f
end

#start(*args) ⇒ Object

Syntax sugar for starting Nyle aplication



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# File 'lib/nyle/screen.rb', line 96

def start(*args)
  self.setup
  self.show_all(*args)
  Nyle.main
end

#suspend ⇒ Object 



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# File 'lib/nyle/screen.rb', line 106

def suspend ; end

#update ⇒ Object

Abstract methods to be overriden



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# File 'lib/nyle/screen.rb', line 104

def update  ; end