Class: Canvas_Control

Inherits:
Object
  • Object
show all
Includes:
Logic_Controls
Defined in:
lib/midinous/canvas.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Logic_Controls

#check_bounds, #color_to_hex, #draw_chevron, #hex_to_color, #pos_box, #relative_pos, #round_num_to_grid, #round_to_grid, #set_point_speed, #sync_diff

Constructor Details

#initialize ⇒ Canvas_Control

Returns a new instance of Canvas_Control.



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# File 'lib/midinous/canvas.rb', line 26

def initialize
  @mouse_last_pos = nil
  @sel_box      = nil
  @selecting    = false
  @sel_white    = [0.8,0.8,0.8,0.1]  #selection box colors

  @sel_blue     = [0,0.5,1,0.5]      #selection box colors

  @point_origin = nil
  @path_origin  = nil
  @point_move   = nil
  @dragging     = false
  @diff         = [0,0]
  @nouspoints   = []
  @travelers    = []
  @starters     = []
  @repeaters    = []
  @scale        = "Chromatic"
  @root_note    = 60
  @scale_notes  = []
  @scale_posns  = []
  set_scale(@scale,@root_note)
  @tempo        = 120.000
  @midi_sync    = 0.000
  @path_sourced = false
  @attempt_path = false
  @ms_per_tick  = 125.000 #default tempo of 120bpm

  @beats        = 4 #number of beats in a whole note -- should be reasonably between 1 and 16

  @beat_note    = 4 #as a fraction of a whole note   -- should be between 2 and 16 via powers of 2

  @grid_spacing = 35
  @queued_note_plays = []
  @queued_note_stops = []
end

Instance Attribute Details

#beat_note ⇒ Object

Returns the value of attribute beat_note.



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# File 'lib/midinous/canvas.rb', line 22

def beat_note
  @beat_note
end

#beats ⇒ Object

Returns the value of attribute beats.



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# File 'lib/midinous/canvas.rb', line 22

def beats
  @beats
end

#dragging ⇒ Object (readonly)

Returns the value of attribute dragging.



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# File 'lib/midinous/canvas.rb', line 24

def dragging
  @dragging
end

#grid_spacing ⇒ Object (readonly)

Returns the value of attribute grid_spacing.



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# File 'lib/midinous/canvas.rb', line 24

def grid_spacing
  @grid_spacing
end

#midi_sync ⇒ Object (readonly)

Returns the value of attribute midi_sync.



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# File 'lib/midinous/canvas.rb', line 24

def midi_sync
  @midi_sync
end

#mouse_last_pos ⇒ Object (readonly)

Returns the value of attribute mouse_last_pos.



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# File 'lib/midinous/canvas.rb', line 24

def mouse_last_pos
  @mouse_last_pos
end

#ms_per_tick ⇒ Object (readonly)

Returns the value of attribute ms_per_tick.



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# File 'lib/midinous/canvas.rb', line 24

def ms_per_tick
  @ms_per_tick
end

#nouspoints ⇒ Object

Returns the value of attribute nouspoints.



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# File 'lib/midinous/canvas.rb', line 22

def nouspoints
  @nouspoints
end

#queued_note_plays ⇒ Object

Returns the value of attribute queued_note_plays.



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# File 'lib/midinous/canvas.rb', line 22

def queued_note_plays
  @queued_note_plays
end

#queued_note_stops ⇒ Object

Returns the value of attribute queued_note_stops.



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# File 'lib/midinous/canvas.rb', line 22

def queued_note_stops
  @queued_note_stops
end

#repeaters ⇒ Object

Returns the value of attribute repeaters.



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# File 'lib/midinous/canvas.rb', line 22

def repeaters
  @repeaters
end

#root_note ⇒ Object

Returns the value of attribute root_note.



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# File 'lib/midinous/canvas.rb', line 22

def root_note
  @root_note
end

#scale ⇒ Object

Returns the value of attribute scale.



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# File 'lib/midinous/canvas.rb', line 22

def scale
  @scale
end

#scale_posns ⇒ Object (readonly)

Returns the value of attribute scale_posns.



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# File 'lib/midinous/canvas.rb', line 24

def scale_posns
  @scale_posns
end

#start_time ⇒ Object (readonly)

Returns the value of attribute start_time.



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# File 'lib/midinous/canvas.rb', line 24

def start_time
  @start_time
end

#tempo ⇒ Object

Returns the value of attribute tempo.



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# File 'lib/midinous/canvas.rb', line 22

def tempo
  @tempo
end

#travelers ⇒ Object

Returns the value of attribute travelers.



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# File 'lib/midinous/canvas.rb', line 22

def travelers
  @travelers
end

Instance Method Details

#canvas_bg_draw(cr) ⇒ Object 



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# File 'lib/midinous/canvas.rb', line 298

def canvas_bg_draw(cr)
  # fill background with black

  cr.set_source_rgb(BLACK)
  cr.paint
  cr.set_source_rgb(BLUGR)
  x = @grid_spacing
  while x < CANVAS_SIZE
    y = @grid_spacing
    while y < CANVAS_SIZE
      cr.circle(x,y,1)
      cr.fill
      y += @grid_spacing
    end
    x += @grid_spacing
  end
  #Handle measure drawing via notches on paths instead of this, maybe

  cr.set_source_rgba(DGREY)
  x = @grid_spacing
  y = CANVAS_SIZE - @grid_spacing
  while x < CANVAS_SIZE
    cr.move_to(x,@grid_spacing)
    cr.line_to(x,CANVAS_SIZE-@grid_spacing)
    cr.set_line_width(1)
    cr.stroke
    x += @grid_spacing*@beats
  end
  y = @grid_spacing
  x = CANVAS_SIZE - @grid_spacing
  while y < CANVAS_SIZE
    cr.move_to(@grid_spacing,y)
    cr.line_to(CANVAS_SIZE-@grid_spacing,y)
    cr.set_line_width(1)
    cr.stroke
    y += @grid_spacing*@beats
  end
end

#canvas_drag(obj, event) ⇒ Object 



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# File 'lib/midinous/canvas.rb', line 251

def canvas_drag(obj,event)
  @dragging = false
  @mouse_last_pos = [event.x,event.y]
  case
    when (@selecting && @sel_box)
      @dragging = true
      @sel_box[2] = event.x
      @sel_box[3] = event.y
      obj.queue_draw
    when (@point_origin)
      @dragging = true
      @point_origin[0] = event.x
      @point_origin[1] = event.y
    when (@point_move)
      @dragging = true
      # difference in movement of the point, cumulative until mouse released

      @diff = round_to_grid([(event.x - @point_move[0]) , (event.y - @point_move[1])])
      @point_move[2] = event.x
      @point_move[3] = event.y
      obj.queue_draw
  end
end

#canvas_draw(cr) ⇒ Object 



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# File 'lib/midinous/canvas.rb', line 335

def canvas_draw(cr)
  canvas_bg_draw(cr)
  case #These draw events are for in-progress/temporary activities

  when(@sel_box)  
    width  = @sel_box[2] - @sel_box[0]
    height = @sel_box[3] - @sel_box[1]
    
    cr.set_source_rgba(@sel_blue)
    cr.rectangle(@sel_box[0],@sel_box[1],width,height)
    cr.set_line_width(2)
    cr.stroke
  when(@point_move)
    start_coord = [@point_move[0],@point_move[1]]
    end_coord   = [@point_move[2],@point_move[3]]
    start_coord = round_to_grid(start_coord)
    end_coord   = round_to_grid(end_coord)
    
    cr.move_to(start_coord[0],start_coord[1])
    cr.set_source_rgba(RED)
    cr.line_to(end_coord[0],end_coord[1])
    cr.set_line_width(2)
    cr.stroke
    cr.rounded_rectangle(end_coord[0]-10,end_coord[1]-10,20,20,2,2)
    cr.set_line_width(2)
    cr.stroke
  end
  
  #Set the scene if the current tool does not permit a style

  case Active_Tool.tool_id
  when 1
    @nouspoints, @path_sourced = Pl.cancel_path(@nouspoints) 
  when 2
    @nouspoints, @path_sourced = Pl.cancel_path(@nouspoints)
  when 3
    @nouspoints, @path_sourced = Pl.cancel_path(@nouspoints)
  when 4
    @nouspoints = Pl.cancel_selected(@nouspoints)
  end

  #Draw all the points and paths last

  @nouspoints.each        { |n| n.set_path_color }
  @nouspoints.each        { |n| n.path_draw(cr) }
  @nouspoints.each        { |n| n.caret_draw(cr) }
  @nouspoints.each        { |n| n.draw(cr) }
  
end

#canvas_generic(string) ⇒ Object

Used as a pseudo-handler between classes



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# File 'lib/midinous/canvas.rb', line 93

def canvas_generic(string) #Used as a pseudo-handler between classes

  case string
  when "path" 
    if !@nouspoints.empty? && @nouspoints.find_all(&:pathable).any?
      @nouspoints = Pl.add_path(@nouspoints)
      @nouspoints, @path_sourced = Pl.cancel_path(@nouspoints)
      UI::canvas.queue_draw
    end
  when "prop"
    @nouspoints = Pl.modify_properties(@nouspoints)
    Pl.populate_prop(@nouspoints)
    UI::canvas.queue_draw
  end
end

#canvas_grid_change(dir) ⇒ Object 



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# File 'lib/midinous/canvas.rb', line 208

def canvas_grid_change(dir)
  prev_beat_note = @beat_note
  case dir
  when "+"
    @beats += 1
    @beats = 16 if @beats > 16
  when "-"
    @beats -= 1
    @beats = 1 if @beats < 1
  when "++"
    @beat_note *= 2
    @beat_note = 16 if @beat_note > 16
  when "--"
    @beat_note /= 2
    @beat_note = 2      if @beat_note < 2
  end
  if @beat_note != prev_beat_note
    case dir
    when "++"
      @ms_per_tick /= 2
    when "--"
      @ms_per_tick *= 2
    end
  end
  UI::t_sig.text = "#{@beats}/#{@beat_note}"
  UI::canvas.queue_draw
end

#canvas_play ⇒ Object 



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# File 'lib/midinous/canvas.rb', line 108

def canvas_play
  
  if @nouspoints.find(&:traveler_start)
    @playing = true
    @nouspoints.find_all {|n| n.path_to.length > 1}.each {|p| p.path_to.each {|e| p.path_to_memory << e}}
    UI::play.sensitive = false
    UI::stop.sensitive = true
  end

  @nouspoints.find_all(&:traveler_start).each do |n|
    @starters << Starter.new(nil,n,nil)
    UI::canvas.queue_draw
    @queued_note_plays.each {|o| o.play}
    signal_chain(n,n.note)
  end
  @stored_time = Time.now.to_f*1000
  canvas_timeout(@ms_per_tick) #Start sequence

end

#canvas_press(obj, event) ⇒ Object 



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# File 'lib/midinous/canvas.rb', line 236

def canvas_press(obj,event)
  UI::logic_controls.focus = true
  case Active_Tool.tool_id
    when 1
      @sel_box   = [event.x,event.y,event.x,event.y]
      @selecting   = true
    when 2
      @point_origin = [event.x,event.y]
    when 3
      @point_move = [event.x,event.y,event.x,event.y]
    when 4
      @path_origin = [event.x,event.y]
  end
  obj.queue_draw
end

#canvas_release(obj, event) ⇒ Object 



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# File 'lib/midinous/canvas.rb', line 273

def canvas_release(obj,event)
  @dragging = false
  case Active_Tool.tool_id
    when 1
      unless !@sel_box
        @sel_box = pos_box(@sel_box)
        @nouspoints = Pl.select_points(@sel_box,@nouspoints)
        @sel_box = nil
        @selecting = false
      end
    when 2 #Add a point where/when the tool is released

      unless !@point_origin
        @nouspoints = Pl.add_point(round_to_grid(@point_origin),@nouspoints)
        @point_origin = nil
      end
    when 3 #move point(s) designated by the move stencil

      @nouspoints = Pl.move_points(@diff,@nouspoints)
      @point_move = nil
      @diff = [0,0]
    when 4 #select singular point

      @nouspoints, @path_sourced = Pl.select_path_point(@path_origin,@nouspoints,@path_sourced)
  end
  obj.queue_draw
end

#canvas_stop ⇒ Object 



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# File 'lib/midinous/canvas.rb', line 161

def canvas_stop
  @playing = false
  @starters  = []
  @repeaters = []
  @queued_note_plays = []
  @queued_note_stops = []
  @nouspoints.find_all {|n| n.path_to.length > 1}.each {|p| p.reset_path_to}
  UI::canvas.queue_draw
  @nouspoints.each do |n|
    n.playing = false
    n.repeating = false
    Pm.note_rlse(n.channel,n.note) unless n.note.to_s.include?("+") || n.note.to_s.include?("-")
  end
  @travelers.each do |t|
    Pm.note_rlse(t.dest.channel,t.played_note) unless t.played_note == nil
  end
  @travelers = []
  UI::stop.sensitive = false
  UI::play.sensitive = true
end

#canvas_timeout(ms) ⇒ Object 



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# File 'lib/midinous/canvas.rb', line 127

def canvas_timeout(ms)
  GLib::Timeout.add(ms) do
    UI::canvas.signal_emit('travel-event') unless !@playing
    false
  end
end

#canvas_travel ⇒ Object 



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# File 'lib/midinous/canvas.rb', line 134

def canvas_travel
  @queued_note_plays = []
  canvas_stop if !@playing               || 
                 (@travelers.length == 0 && 
                  @starters.length  == 0 && 
                  @repeaters.length == 0)
  
  @starters.each  {|s| s.travel}
  @travelers.each {|t| t.travel}
  @travelers.find_all(&:reached).each do |t|
    signal_chain(t.dest,t.played_note) #Pass the last played note here. Gather the played note from the first traveler creation

    t.reached = false
  end
  @repeaters.each {|r| r.repeat}
  
  @queued_note_stops.each {|n| n.stop}
  @queued_note_plays.each {|n| n.play}
  @starters.reject!(&:remove)
  @travelers.reject!(&:remove)
  @repeaters.reject!(&:remove)
  @queued_note_stops = []

  canvas_timeout(sync_diff(@stored_time))
  @stored_time += @ms_per_tick
  UI::canvas.queue_draw
end

#set_scale(scale_text, root) ⇒ Object 



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# File 'lib/midinous/canvas.rb', line 62

def set_scale(scale_text,root)
  @scale = scale_text
  @root_note = root
  scale = SCALES[scale_text]
  slen = scale.length
  @scale_notes = []
  @scale_notes << root
  
  c = 0
  note = root
  while note < 127
    note += scale[c]
    @scale_notes << note unless note > 127
    c = (c + 1) % slen
  end

  c = 0
  note = root
  while note > 0
    note -= scale.reverse[c]
    @scale_notes << note unless note < 0
    c = (c + 1) % slen
  end
  @scale_notes.sort!
  
  (0..127).each do |num|
    @scale_posns[num] = false
    @scale_posns[num] = true if @scale_notes.find {|f| f == num} != nil
  end
end

#set_tempo(tempo) ⇒ Object 



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# File 'lib/midinous/canvas.rb', line 58

def set_tempo(tempo)
  @tempo = tempo
  @ms_per_tick = (1000 * (15 / @tempo)) / (@beat_note / 4)
end

#signal_chain(point, pn) ⇒ Object

pn = played note



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# File 'lib/midinous/canvas.rb', line 182

def signal_chain(point,pn) #pn = played note

  case point.play_modes[0]
  when "robin"
    p = point.path_to.first
    if p
      @travelers << Traveler.new(point,p,pn)
      point.path_to.rotate!
    end
  when "split"
    point.path_to.each {|p| @travelers << Traveler.new(point,p,pn)}
  when "portal"
    point.path_to.each do |p|
      @starters << Starter.new(point,p,pn)
      UI::canvas.queue_draw
      #@queued_note_plays.each {|o| o.play}

      signal_chain(p,pn)
    end
  when "random"
    p = point.path_to.sample
    if p
      @travelers << Traveler.new(point,p,pn)
      point.path_to.rotate!(rand(point.path_to.length))
    end
  end
end