Class: Umbra::Dialog

Inherits:
Object
  • Object
show all
Defined in:
lib/umbra/dialog.rb

Overview

A simple dialog box that only displays a line of text, centered. It can take an array of button labels (just strings) and display them, and return the index of the button pressed, when closed. If no buttons are supplied, an “Ok” button is displayed. Minimum requirements are ‘text` and `title`

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(config = {}, &block) ⇒ Dialog

currently color and attr for text is missing. I think it should be what window has.



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# File 'lib/umbra/dialog.rb', line 38

def initialize config={}, &block
  config.each_pair { |k,v| variable_set(k,v) }
  if block_given?
    if block.arity > 0
      yield self
    else
      self.instance_eval(&block)
    end
  end
  @title       ||= "Alert"
  @buttons     ||= ["Ok"]
end

Instance Attribute Details

#border_attr ⇒ Object

attribute of border



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# File 'lib/umbra/dialog.rb', line 33

def border_attr
  @border_attr
end

#border_color_pair ⇒ Object

color pair of border



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# File 'lib/umbra/dialog.rb', line 32

def border_color_pair
  @border_color_pair
end

#buttons ⇒ Object

button text array



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# File 'lib/umbra/dialog.rb', line 34

def buttons
  @buttons
end

#text ⇒ Object

text or message to print centered



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# File 'lib/umbra/dialog.rb', line 26

def text
  @text
end

#title ⇒ Object

title of dialog



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# File 'lib/umbra/dialog.rb', line 27

def title
  @title
end

#title_attr ⇒ Object

attribute of title



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# File 'lib/umbra/dialog.rb', line 29

def title_attr
  @title_attr
end

#title_color_pair ⇒ Object

color pair of title



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# File 'lib/umbra/dialog.rb', line 28

def title_color_pair
  @title_color_pair
end

#window_attr ⇒ Object

attribute of window



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# File 'lib/umbra/dialog.rb', line 31

def window_attr
  @window_attr
end

#window_color_pair ⇒ Object

color pair of window



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# File 'lib/umbra/dialog.rb', line 30

def window_color_pair
  @window_color_pair
end

Instance Method Details

#key(ch) ⇒ Object

convenience func to get int value of a key {{{ added 2014-05-05 instead of ?C-a.getbyte(0) use key(?C-a) or key(?a) or key(?M-x)



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# File 'lib/umbra/dialog.rb', line 128

def key ch
  ch.getbyte(0)
end

#paint_buttons(win, buttons, active_index) ⇒ Object 



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# File 'lib/umbra/dialog.rb', line 97

def paint_buttons win, buttons, active_index
  brow   = 6
  bcol   = (win.width-(buttons.size*10))/2
  origbcol = bcol
  FFI::NCurses.mvwhline(win.pointer, brow-1, 3, FFI::NCurses::ACS_HLINE, win.width-6)
  #@button_color ||= create_color_pair(COLOR_BLACK, COLOR_MAGENTA)
  @button_color ||= CP_BLACK
  active_color = create_color_pair(COLOR_BLACK, COLOR_MAGENTA)
  #active_color = create_color_pair(COLOR_MAGENTA, COLOR_BLACK)
  active_col = bcol
  buttons.each_with_index do |button, ix|
    button_attr  = NORMAL
    button_color = @button_color
    _button = "[ #{button} ]"
    if ix == active_index
      button_attr = BOLD
      button_color = active_color
      active_col = bcol
      _button = "> #{button} <"
    end
    win.printstring brow, bcol, _button, button_color, button_attr
    bcol += 10
  end
  FFI::NCurses.wmove(win.pointer, brow, active_col+2)
end

#run ⇒ Object

}}}



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# File 'lib/umbra/dialog.rb', line 131

def run
 _create_window unless @window 
  win = @window
  buttoncount = @buttons.count
  buttonindex = 0
  begin
    while (ch = win.getkey) != FFI::NCurses::KEY_RETURN
      begin
        next if ch == -1
        break if ch == 32 or key(?q) == ch
        # go to next button if right or down or TAB pressed
        if ch == FFI::NCurses::KEY_TAB or ch == FFI::NCurses::KEY_RIGHT or FFI::NCurses::KEY_DOWN
          buttonindex += 1
        elsif ch == FFI::NCurses::KEY_LEFT or FFI::NCurses::KEY_UP
          buttonindex -= 1
        else
          # should check against first char of buttons TODO
          #puts "Don't know #{ch}"
        end
        buttonindex = 0 if buttonindex > buttoncount-1
        buttonindex = buttoncount-1 if buttonindex < 0
        paint_buttons win, @buttons, buttonindex
      rescue => e
        puts e
        puts e.backtrace.join("\n")
      end
      win.wrefresh
    end
  ensure
    win.destroy
  end
  #FFI::NCurses.endwin # don't think this should be here if popped up by another window
  return buttonindex
end