Method: CDK::Movement#position

Defined in:
lib/cdk/mixins/movement.rb

#position(win) ⇒ Object

This allows the user to use the cursor keys to adjust the postion of the widget.



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# File 'lib/cdk/mixins/movement.rb', line 53

def position(win)
  parent = @screen.window
  orig_x = win.getbegx
  orig_y = win.getbegy
  beg_x = parent.getbegx
  beg_y = parent.getbegy
  end_x = beg_x + @screen.window.getmaxx
  end_y = beg_y + @screen.window.getmaxy

  # Let them move the widget around until they hit return.
  while !([CDK::KEY_RETURN, Ncurses::KEY_ENTER].include?(
      key = self.getch([])))
    case key
    when Ncurses::KEY_UP, '8'.ord
      if win.getbegy > beg_y
        self.move(0, -1, true, true)
      else
        CDK.Beep
      end
    when Ncurses::KEY_DOWN, '2'.ord
      if (win.getbegy + win.getmaxy) < end_y
        self.move(0, 1, true, true)
      else
        CDK.Beep
      end
    when Ncurses::KEY_LEFT, '4'.ord
      if win.getbegx > beg_x
        self.move(-1, 0, true, true)
      else
        CDK.Beep
      end
    when Ncurses::KEY_RIGHT, '6'.ord
      if (win.getbegx + win.getmaxx) < end_x
        self.move(1, 0, true, true)
      else
        CDK.Beep
      end
    when '7'.ord
      if win.getbegy > beg_y && win.getbegx > beg_x
        self.move(-1, -1, true, true)
      else
        CDK.Beep
      end
    when '9'.ord
      if (win.getbegx + win.getmaxx) < end_x && win.getbegy > beg_y
        self.move(1, -1, true, true)
      else
        CDK.Beep
      end
    when '1'.ord
      if win.getbegx > beg_x && (win.getbegy + win.getmaxy) < end_y
        self.move(-1, 1, true, true)
      else
        CDK.Beep
      end
    when '3'.ord
      if (win.getbegx + win.getmaxx) < end_x &&
          (win.getbegy + win.getmaxy) < end_y
        self.move(1, 1, true, true)
      else
        CDK.Beep
      end
    when '5'.ord
      self.move(CDK::CENTER, CDK::CENTER, false, true)
    when 't'.ord
      self.move(win.getbegx, CDK::TOP, false, true)
    when 'b'.ord
      self.move(win.getbegx, CDK::BOTTOM, false, true)
    when 'l'.ord
      self.move(CDK::LEFT, win.getbegy, false, true)
    when 'r'.ord
      self.move(CDK::RIGHT, win.getbegy, false, true)
    when 'c'.ord
      self.move(CDK::CENTER, win.getbegy, false, true)
    when 'C'.ord
      self.move(win.getbegx, CDK::CENTER, false, true)
    when CDK::REFRESH
      @screen.erase
      @screen.refresh
    when CDK::KEY_ESC
      self.move(orig_x, orig_y, false, true)
    else
      CDK.Beep
    end
  end
end