Class: Presentation

Inherits:
Object
  • Object
show all
Includes:
Soby
Defined in:
lib/soby/presentation.rb

Defined Under Namespace

Classes: MyVideo

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Soby

#create_mat4x4, #get_angle, #get_global_transform, #read_transform

Constructor Details

#initialize(app, url) ⇒ Presentation 



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# File 'lib/soby/presentation.rb', line 16

def initialize (app, url)
  @app = app
  xml = app.loadXML(url)
  @pshape = PShapeSVG.new(xml)
  @svg = Nokogiri::XML(open(url)).children[1];

  @graphics = @app.g
  build_internal

end

Instance Attribute Details

#debug ⇒ Object (readonly)

Returns the value of attribute debug.



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# File 'lib/soby/presentation.rb', line 12

def debug
  @debug
end

#geometry ⇒ Object

Returns the value of attribute geometry.



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# File 'lib/soby/presentation.rb', line 10

def geometry
  @geometry
end

#graphics ⇒ Object

Returns the value of attribute graphics.



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# File 'lib/soby/presentation.rb', line 14

def graphics
  @graphics
end

#height ⇒ Object

Returns the value of attribute height.



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# File 'lib/soby/presentation.rb', line 11

def height
  @height
end

#matrix ⇒ Object

Returns the value of attribute matrix.



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# File 'lib/soby/presentation.rb', line 11

def matrix
  @matrix
end

#nb_slides ⇒ Object (readonly)

Returns the value of attribute nb_slides.



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# File 'lib/soby/presentation.rb', line 12

def nb_slides
  @nb_slides
end

#pshape ⇒ Object

Returns the value of attribute pshape.



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# File 'lib/soby/presentation.rb', line 10

def pshape
  @pshape
end

#slides ⇒ Object

Returns the value of attribute slides.



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# File 'lib/soby/presentation.rb', line 10

def slides
  @slides
end

#svg ⇒ Object

Returns the value of attribute svg.



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# File 'lib/soby/presentation.rb', line 10

def svg
  @svg
end

#transform ⇒ Object

Returns the value of attribute transform.



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# File 'lib/soby/presentation.rb', line 10

def transform
  @transform
end

#videos ⇒ Object

Returns the value of attribute videos.



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# File 'lib/soby/presentation.rb', line 11

def videos
  @videos
end

#width ⇒ Object

Returns the value of attribute width.



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# File 'lib/soby/presentation.rb', line 11

def width
  @width
end

Instance Method Details

#add_group(group, slide) ⇒ Object 



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# File 'lib/soby/presentation.rb', line 112

def add_group(group, slide) 
  
  id = slide.title
  refid = slide.refid
  add_slide(slide) 

  # TODO: Find the bounding box of any  group..
  # TODO: Hide the whole group ?
  surf_max = 0
  biggest_rect = nil
  
  ## biggest_rect surface..
  group.css("rect").each do |rect|
    #          (group.css("rect") + group.css("image")).each do |rect|
    
    if biggest_rect == nil 
      biggest_rect = rect
    end
    
    surf_rect = rect.attributes["width"].value.to_i \
    * rect.attributes["height"].value.to_i

    if(surf_rect > surf_max) 
      biggest_rect = rect 
      surf_max = surf_rect
    end
  end  # rect.each 
  
  rect_id = biggest_rect.attributes["id"].value
  transform = get_global_transform biggest_rect
  @slides[id].set_geometry(biggest_rect, transform[0])     

  # The description (code to excute) might be in the group  and not in the rect. 
  ## TODO: check if it should really be the first ?
  desc = group.css("desc").first
  title = group.css("title").first

  if desc != nil 
    if title == nil || (title.text.match(/animation/) == nil and title.text.match(/video/) == nil)
      puts "Group Description read #{desc.text}" 
      
      @slides[id].description =  desc.text
    end
  end
  
  e = @pshape.getChild(rect_id)
  # hide the rect
  if e == nil 
    puts "Error: rect ID:  #{rect_id} not found "
  else
    @pshape.getChild(rect_id).setVisible(!@slides[id].hide)
  end 

  puts "Slide #{id} created from a group, and the rectangle: #{rect_id}"

end

#add_rect_or_image_frame(element, slide) ⇒ Object 



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# File 'lib/soby/presentation.rb', line 89

def add_rect_or_image_frame(element, slide)
  id = slide.title
  refid = slide.refid

  add_slide(slide) 

  # set the geometry &  transformation
  transform = get_global_transform element
  @slides[id].set_geometry(element, transform[0])        
  pshape_element = @pshape.getChild(refid)

  # hide the element
  if pshape_element == nil 
    puts "Error: rect or Image  ID:  #{refid} not found. CHECK THE PROCESSING VERSION."
  else
    pshape_element.setVisible(!@slides[id].hide) if element.name == "rect"
  end

  puts "Slide #{id} created from a rect : #{refid}" if element.name == "rect"
  puts "Slide #{id} created from an image: #{refid}" if element.name == "image"
end

#add_slide(new_slide) ⇒ Object 



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# File 'lib/soby/presentation.rb', line 80

def add_slide(new_slide)

  puts "Add slide, id " << new_slide.title << " numero " << new_slide.sequence
  @slides[new_slide.sequence] = new_slide
  @slides[new_slide.title] = new_slide
  @nb_slides = @nb_slides+1
end

#build_internal ⇒ Object 



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# File 'lib/soby/presentation.rb', line 31

def build_internal 

  # Create the frames.. 
  @slides = {}
  @nb_slides = 0
  @playing_videos = []

  puts "Svg null, look for the error... !"  if @svg == nil
  return if @svg == nil 

  load_frames
  load_videos
  load_animations
end

#display_videos ⇒ Object 



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# File 'lib/soby/presentation.rb', line 255

def display_videos
  if not @app.is_moving 

    slide_no = @app.current_slide_no

    # # Display the videos
    if slide_no > 0 and  @slides[slide_no].has_videos? 
      

      # draw the object
      @graphics.imageMode(Processing::App::CORNER)
      
      @slides[slide_no].videos.each do |my_video| 
        @graphics.push_matrix
        @graphics.modelview.apply(my_video.matrix)
        
        # when the video is loaded it is saved... so that the memory can
        # hopefully be freed
        @playing_videos << my_video if my_video.play 

#          my_video.video.read if my_video.video.available?           
#          my_video.video.read
        @graphics.image(my_video.video, 0, 0, my_video.width, my_video.height)

        
        @graphics.pop_matrix
      end # videos.each
      
    else  # has_videos

      ## no video, free some memory 
      @playing_videos.each do |my_video|
        puts "Saving memory. "
        my_video.video.stop
        my_video.video = nil 
        System.gc
      end
      @playing_videos =  []
    end 
  end
end

#draw ⇒ Object 



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# File 'lib/soby/presentation.rb', line 46

def draw
  @graphics.shape pshape, 0, 0
#    display_videos
end

#load_animations ⇒ Object 



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# File 'lib/soby/presentation.rb', line 213

def load_animations

  puts "Loading the animations..."

  @svg.css("*").each do |elem|

    valid = false
    elem.children.each do |child|
      valid = true if child.name == "title" && child.text.match(/animation/)
    end

    next unless valid

    id = elem.attributes["id"].value

    # Get the animation information 
    t = elem.css("desc").text.split("\n")

    # 1. which slide
    # 2. when 
    slide_id = t[0]
    anim_id = t[1].to_i

    animation = OpenStruct.new
    animation.pshape_elem = @pshape.getChild(id)

    puts "Animation found on slide #{slide_id} with element #{animation.pshape_elem}"

    if  @slides[slide_id] == nil 
      puts "Error -> The animation #{id}  is linked to the slide #{slide_id} which is not found !" 
    else 
      # add the animation
      @slides[slide_id].add_animation(anim_id, animation)
      
      # hide the group !
      animation.pshape_elem.setVisible(false) unless animation.pshape_elem == nil
      puts "Animation #{id} loaded with  #{slide_id}"
    end
  end

end

#load_frames ⇒ Object 



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# File 'lib/soby/presentation.rb', line 52

def load_frames

  puts "Loading the frames..."
  @svg.children.each do |child| 
    
    next unless child.name =~ /frame/

    ## ignore if it references nothing. 
    attr = child.attributes
    next if attr["refid"] == nil

    slide = Slide.new(child)      
    
    # get the element associated with each slide...
    @svg.search("[id=" + slide.refid + "]").each do |elem|

      case elem.name 
      when "rect", "image"
        add_rect_or_image_frame(elem, slide)
      when "g" 
        add_group(elem, slide)
      else 
        puts "Slide type not supported ! "  + elem.name
      end # end case
    end # search
  end # frame
end

#load_videos ⇒ Object 



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# File 'lib/soby/presentation.rb', line 172

def load_videos
  # Load the videos...
  puts "Loading the videos..."

  @svg.css("rect").each do |rect|

    return if rect.attributes["id"] == nil
    id = rect.attributes["id"].value       #get the id 

    title = rect.css("title")
    next if title == nil 

    is_video = title.text.match(/video/) != nil 
    next unless is_video
    
    t = rect.css("desc").text.split("\n")
    slide_id = t[0]
    path = t[1]

    puts ("Loading the video : " + path)

    # Get the transformation
    tr = get_global_transform rect 

    video = MyVideo.new(path, @slides[slide_id], tr[0], tr[1], tr[2]) 

    if  @slides[slide_id] == nil 
      puts "Error -> The video #{id}  is linked to the slide #{slide_id} which is not found !" 
    else 

      @slides[slide_id].add_video(video)
      puts "Video #{id} loaded with  #{slide_id}"
    end

    # Hide the rect, and ... TODO replace it with a special object
    #      @pshape.getChild(id).setVisible(false)
  end
end

#to_s ⇒ Object 



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# File 'lib/soby/presentation.rb', line 338

def to_s 
  "Slides #{@slides.size}" 
end