### Home Classes Methods

### In Files

- lib/RMagick.rb
- ext/RMagick/rmmain.c

### Parent

Object

### Namespace

- CLASS Magick::ImageList::Montage

### Methods

- ::new
- #*
- #<<
- #<=>
- #[]
- #[]=
- #__map__
- #__map__!
- #__respond_to__?
- #clear
- #clone
- #collect
- #collect!
- #compact
- #compact!
- #concat
- #copy
- #cur_image
- #delay=
- #delete
- #delete_at
- #delete_if
- #dup
- #eql?
- #fill
- #find_all
- #from_blob
- #indexes
- #indices
- #insert
- #inspect
- #is_an_image
- #is_an_image_array
- #iterations=
- #last
- #map!
- #marshal_dump
- #marshal_load
- #method_missing
- #new_image
- #nitems
- #partition
- #ping
- #pop
- #push
- #read
- #reject
- #reject!
- #replace
- #respond_to?
- #reverse
- #reverse!
- #reverse_each
- #scene=
- #select
- #set_current
- #shift
- #slice
- #slice!
- #ticks_per_second=
- #to_a
- #uniq
- #uniq!
- #unshift
- #values_at

### Included Modules

- Comparable
- Enumerable

### Files

- MANIFEST
- Makefile

### Class/Module Index

Quicksearch

- Magick
- Magick::DestroyedImageError
- Magick::Draw
- Magick::Enum
- Magick::FatalImageMagickError
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- Magick::IPTC::ObjectData
- Magick::IPTC::Post_ObjectData_Descriptor
- Magick::IPTC::Pre_ObjectData_Descriptor
- Magick::Image
- Magick::Image::DrawOptions
- Magick::Image::Info
- Magick::Image::PolaroidOptions
- Magick::Image::View
- Magick::Image::View::Pixels
- Magick::Image::View::Rows
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- Magick::ImageList::Montage
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- Magick::RVG::Utility::TBTextStrategy
- Magick::RVG::Utility::TextAttributes
- Magick::RVG::Utility::TextStrategy
- Magick::TextureFill
- Object

No matching classes.

# Magick::ImageList

### Attributes

scene[R]

### Public Class Methods

new(*filenames, &block) click to toggle source

Initialize new instances

    # File lib/RMagick.rb, line 1631
    def initialize(*filenames, &block)
        @images = []
        @scene = nil
        filenames.each { |f|
            Magick::Image.read(f, &block).each { |n| @images << n }
            }
        if length > 0
            @scene = length - 1     # last image in array
        end
        self
    end

### Public Instance Methods

*(n) click to toggle source

    # File lib/RMagick.rb, line 1390
    def *(n)
        unless n.kind_of? Integer
            Kernel.raise ArgumentError, "Integer required (#{n.class} given)"
        end
        current = get_current()
        ilist = self.class.new
        (@images * n).each {|image| ilist << image}
        ilist.set_current current
        return ilist
    end

<<(obj) click to toggle source

    # File lib/RMagick.rb, line 1401
    def <<(obj)
        is_an_image obj
        @images << obj
        @scene = @images.length - 1
        self
    end

<=>(other) click to toggle source

Compare ImageLists Compare each image in turn until the result of a comparison is not 0. If all comparisons return 0, then

    return if A.scene != B.scene
    return A.length <=> B.length

    # File lib/RMagick.rb, line 1413
    def <=>(other)
        unless other.kind_of? self.class
           Kernel.raise TypeError, "#{self.class} required (#{other.class} given)"
        end
        size = [self.length, other.length].min
        size.times do |x|
            r = self[x] <=> other[x]
            return r unless r == 0
        end
        if @scene.nil? && other.scene.nil?
            return 0
        elsif @scene.nil? && ! other.scene.nil?
            Kernel.raise TypeError, "cannot convert nil into #{other.scene.class}"
        elsif ! @scene.nil? && other.scene.nil?
            Kernel.raise TypeError, "cannot convert nil into #{self.scene.class}"
        end
        r = self.scene <=> other.scene
        return r unless r == 0
        return self.length <=> other.length
    end

[](*args) click to toggle source

    # File lib/RMagick.rb, line 1434
    def [](*args)
        a = @images[*args]
        if a.respond_to?(:each) then
            ilist = self.class.new
            a.each {|image| ilist << image}
            a = ilist
        end
        return a
    end

[]=(*args) click to toggle source

    # File lib/RMagick.rb, line 1444
    def []=(*args)
        obj = @images.[]=(*args)
        if obj && obj.respond_to?(:each) then
            is_an_image_array(obj)
            set_current obj.last.__id__
        elsif obj
            is_an_image(obj)
            set_current obj.__id__
        else
            set_current nil
        end
        return obj
    end

__map__(&block) click to toggle source

ImageList#map took over the "map" name. Use alternatives.

Alias for: collect
__map__!(&block) click to toggle source
Alias for: collect!
__respond_to__?(methID, priv=false) click to toggle source

Ensure respond_to? answers correctly when we are delegating to Image

Alias for: respond_to?
clear() click to toggle source

    # File lib/RMagick.rb, line 1475
    def clear
        @scene = nil
        @images.clear
    end

clone() click to toggle source

    # File lib/RMagick.rb, line 1480
    def clone
        ditto = dup
        ditto.freeze if frozen?
        return ditto
    end

collect(&block) click to toggle source

override Enumerable#collect

    # File lib/RMagick.rb, line 1487
    def collect(&block)
        current = get_current()
        a = @images.collect(&block)
        ilist = self.class.new
        a.each {|image| ilist << image}
        ilist.set_current current
        return ilist
    end

Also aliased as: __map__
collect!(&block) click to toggle source

    # File lib/RMagick.rb, line 1496
    def collect!(&block)
        @images.collect!(&block)
        is_an_image_array @images
        self
    end

Also aliased as: map!, __map__!
compact() click to toggle source

    # File lib/RMagick.rb, line 1527
    def compact
        current = get_current()
        ilist = self.class.new
        a = @images.compact
        a.each {|image| ilist << image}
        ilist.set_current current
        return ilist
    end

compact!() click to toggle source

    # File lib/RMagick.rb, line 1536
    def compact!
        current = get_current()
        a = @images.compact!    # returns nil if no changes were made
        set_current current
        return a.nil? ? nil : self
    end

concat(other) click to toggle source

    # File lib/RMagick.rb, line 1543
    def concat(other)
        is_an_image_array other
        other.each {|image| @images << image}
        @scene = length-1
        return self
    end

copy() click to toggle source

Make a deep copy

    # File lib/RMagick.rb, line 1503
    def copy
        ditto = self.class.new
        @images.each { |f| ditto << f.copy }
        ditto.scene = @scene
        ditto.taint if tainted?
        return ditto
    end

cur_image() click to toggle source

Return the current image

    # File lib/RMagick.rb, line 1512
    def cur_image
        if ! @scene
            Kernel.raise IndexError, "no images in this list"
        end
        @images[@scene]
    end

delay=(d) click to toggle source

Set same delay for all images

    # File lib/RMagick.rb, line 1551
    def delay=(d)
        if Integer(d) < 0
            raise ArgumentError, "delay must be greater than or equal to 0"
        end
        @images.each { |f| f.delay = Integer(d) }
    end

delete(obj, &block) click to toggle source

    # File lib/RMagick.rb, line 1558
    def delete(obj, &block)
        is_an_image obj
        current = get_current()
        a = @images.delete(obj, &block)
        set_current current
        return a
    end

delete_at(ndx) click to toggle source

    # File lib/RMagick.rb, line 1566
    def delete_at(ndx)
        current = get_current()
        a = @images.delete_at(ndx)
        set_current current
        return a
    end

delete_if(&block) click to toggle source

    # File lib/RMagick.rb, line 1573
    def delete_if(&block)
        current = get_current()
        @images.delete_if(&block)
        set_current current
        self
    end

dup() click to toggle source

    # File lib/RMagick.rb, line 1580
    def dup
        ditto = self.class.new
        @images.each {|img| ditto << img}
        ditto.scene = @scene
        ditto.taint if tainted?
        return ditto
    end

eql?(other) click to toggle source

    # File lib/RMagick.rb, line 1588
    def eql?(other)
      is_an_image_array other
      eql = other.eql?(@images)
      begin # "other" is another ImageList
        eql &&= @scene == other.scene
      rescue NoMethodError
        # "other" is a plain Array
      end
      return eql
    end

fill(*args, &block) click to toggle source

    # File lib/RMagick.rb, line 1599
    def fill(*args, &block)
        is_an_image args[0] unless block_given?
        current = get_current()
        @images.fill(*args, &block)
        is_an_image_array self
        set_current current
        self
    end

find_all(&block) click to toggle source

Override Enumerable's find_all

    # File lib/RMagick.rb, line 1609
    def find_all(&block)
        current = get_current()
        a = @images.find_all(&block)
        ilist = self.class.new
        a.each {|image| ilist << image}
        ilist.set_current current
        return ilist
    end

Also aliased as: select
from_blob(*blobs, &block) click to toggle source

    # File lib/RMagick.rb, line 1619
    def from_blob(*blobs, &block)
        if (blobs.length == 0)
            Kernel.raise ArgumentError, "no blobs given"
        end
        blobs.each { |b|
            Magick::Image.from_blob(b, &block).each { |n| @images << n  }
            }
        @scene = length - 1
        self
    end

indexes(*args) click to toggle source
Alias for: values_at
indices(*args) click to toggle source
Alias for: values_at
insert(index, *args) click to toggle source

    # File lib/RMagick.rb, line 1643
    def insert(index, *args)
        args.each {|image| is_an_image image}
        current = get_current()
        @images.insert(index, *args)
        set_current current
        return self
    end

inspect() click to toggle source

Call inspect for all the images

    # File lib/RMagick.rb, line 1652
    def inspect
        img = []
        @images.each {|image| img << image.inspect }
        img = "[" + img.join(",\n") + "]\nscene=#{@scene}"
    end

iterations=(n) click to toggle source

Set the number of iterations of an animated GIF

    # File lib/RMagick.rb, line 1659
    def iterations=(n)
        n = Integer(n)
        if n < 0 || n > 65535
            Kernel.raise ArgumentError, "iterations must be between 0 and 65535"
        end
        @images.each {|f| f.iterations=n}
        self
    end

last(*args) click to toggle source

    # File lib/RMagick.rb, line 1668
    def last(*args)
        if args.length == 0
          a = @images.last
        else
          a = @images.last(*args)
          ilist = self.class.new
          a.each {|img| ilist << img}
          @scene = a.length - 1
          a = ilist
        end
        return a
    end

map!(&block) click to toggle source
Alias for: collect!
marshal_dump() click to toggle source

Custom marshal/unmarshal for Ruby 1.8.

    # File lib/RMagick.rb, line 1682
    def marshal_dump()
       ary = [@scene]
       @images.each {|i| ary << Marshal.dump(i)}
       ary
    end

marshal_load(ary) click to toggle source

    # File lib/RMagick.rb, line 1688
    def marshal_load(ary)
       @scene = ary.shift
       @images = []
       ary.each {|a| @images << Marshal.load(a)}
    end

method_missing(methID, *args, &block) click to toggle source

The ImageList class supports the Magick::Image class methods by simply sending the method to the current image. If the method isn't explicitly supported, send it to the current image in the array. If there are no images, send it up the line. Catch a NameError and emit a useful message.

    # File lib/RMagick.rb, line 1698
    def method_missing(methID, *args, &block)
        begin
            if @scene
                @images[@scene].send(methID, *args, &block)
            else
                super
            end
        rescue NoMethodError
          Kernel.raise NoMethodError, "undefined method `#{methID.id2name}' for #{self.class}"
        rescue Exception
            $@.delete_if { |s| /:in `send'$/.match(s) || /:in `method_missing'$/.match(s) }
            Kernel.raise
        end
    end

new_image(cols, rows, *fill, &info_blk) click to toggle source

Create a new image and add it to the end

    # File lib/RMagick.rb, line 1714
    def new_image(cols, rows, *fill, &info_blk)
        self << Magick::Image.new(cols, rows, *fill, &info_blk)
    end

nitems() click to toggle source

    # File lib/RMagick.rb, line 1470
    def nitems()
       @images.nitems()
    end

partition(&block) click to toggle source

    # File lib/RMagick.rb, line 1718
    def partition(&block)
      a = @images.partition(&block)
      t = self.class.new
      a[0].each { |img| t << img}
      t.set_current nil
      f = self.class.new
      a[1].each { |img| f << img}
      f.set_current nil
      [t, f]
    end

ping(*files, &block) click to toggle source

Ping files and concatenate the new images

    # File lib/RMagick.rb, line 1730
    def ping(*files, &block)
        if (files.length == 0)
            Kernel.raise ArgumentError, "no files given"
        end
        files.each { |f|
            Magick::Image.ping(f, &block).each { |n| @images << n }
            }
        @scene = length - 1
        self
    end

pop() click to toggle source

    # File lib/RMagick.rb, line 1741
    def pop
        current = get_current()
        a = @images.pop       # can return nil
        set_current current
        return a
    end

push(*objs) click to toggle source

    # File lib/RMagick.rb, line 1748
    def push(*objs)
        objs.each do |image|
            is_an_image image
            @images << image
        end
        @scene = length - 1
        self
    end

read(*files, &block) click to toggle source

Read files and concatenate the new images

    # File lib/RMagick.rb, line 1758
    def read(*files, &block)
        if (files.length == 0)
            Kernel.raise ArgumentError, "no files given"
        end
        files.each { |f|
            Magick::Image.read(f, &block).each { |n| @images << n }
            }
        @scene = length - 1
        self
    end

reject(&block) click to toggle source

override Enumerable's reject

    # File lib/RMagick.rb, line 1770
    def reject(&block)
        current = get_current()
        ilist = self.class.new
        a = @images.reject(&block)
        a.each {|image| ilist << image}
        ilist.set_current current
        return ilist
    end

reject!(&block) click to toggle source

    # File lib/RMagick.rb, line 1779
    def reject!(&block)
        current = get_current()
        a = @images.reject!(&block)
        @images = a if !a.nil?
        set_current current
        return a.nil? ? nil : self
    end

replace(other) click to toggle source

    # File lib/RMagick.rb, line 1787
    def replace(other)
        is_an_image_array other
        current = get_current()
        @images.clear
        other.each {|image| @images << image}
        @scene = self.length == 0 ? nil : 0
        set_current current
        self
    end

respond_to?(methID, priv=false) click to toggle source

    # File lib/RMagick.rb, line 1799
    def respond_to?(methID, priv=false)
        return true if __respond_to__?(methID, priv)
        if @scene
            @images[@scene].respond_to?(methID, priv)
        else
            super
        end
    end

Also aliased as: __respond_to__?
reverse() click to toggle source

    # File lib/RMagick.rb, line 1808
    def reverse
        current = get_current()
        a = self.class.new
        @images.reverse_each {|image| a << image}
        a.set_current current
        return a
    end

reverse!() click to toggle source

    # File lib/RMagick.rb, line 1816
    def reverse!
        current = get_current()
        @images.reverse!
        set_current current
        self
    end

reverse_each() click to toggle source

    # File lib/RMagick.rb, line 1823
    def reverse_each
        @images.reverse_each {|image| yield(image)}
        self
    end

scene=(n) click to toggle source

Allow scene to be set to nil

    # File lib/RMagick.rb, line 1351
    def scene=(n)
        if n.nil?
            Kernel.raise IndexError, "scene number out of bounds" unless @images.length == 0
            @scene = nil
            return @scene
        elsif @images.length == 0
            Kernel.raise IndexError, "scene number out of bounds"
        end

        n = Integer(n)
        if n < 0 || n > length - 1
            Kernel.raise IndexError, "scene number out of bounds"
        end
        @scene = n
        return @scene
    end

select(&block) click to toggle source
Alias for: find_all
shift() click to toggle source

    # File lib/RMagick.rb, line 1828
    def shift
        current = get_current()
        a = @images.shift
        set_current current
        return a
    end

slice(*args) click to toggle source

    # File lib/RMagick.rb, line 1835
    def slice(*args)
        current = get_current()
        slice = @images.slice(*args)
        if slice
            ilist = self.class.new
            if slice.respond_to?(:each) then
                slice.each {|image| ilist << image}
            else
                ilist << slice
            end
        else
            ilist = nil
        end
        return ilist
    end

slice!(*args) click to toggle source

    # File lib/RMagick.rb, line 1851
    def slice!(*args)
        current = get_current()
        a = @images.slice!(*args)
        set_current current
        return a
    end

ticks_per_second=(t) click to toggle source

    # File lib/RMagick.rb, line 1858
    def ticks_per_second=(t)
        if Integer(t) < 0
            Kernel.raise ArgumentError, "ticks_per_second must be greater than or equal to 0"
        end
        @images.each { |f| f.ticks_per_second = Integer(t) }
    end

to_a() click to toggle source

    # File lib/RMagick.rb, line 1865
    def to_a
        a = Array.new
        @images.each {|image| a << image}
        return a
    end

uniq() click to toggle source

    # File lib/RMagick.rb, line 1871
    def uniq
        current = get_current()
        a = self.class.new
        @images.uniq.each {|image| a << image}
        a.set_current current
        return a
    end

uniq!(*args) click to toggle source

    # File lib/RMagick.rb, line 1879
    def uniq!(*args)
        current = get_current()
        a = @images.uniq!
        set_current current
        return a.nil? ? nil : self
    end

unshift(obj) click to toggle source

@scene -> new object

    # File lib/RMagick.rb, line 1887
    def unshift(obj)
        is_an_image obj
        @images.unshift(obj)
        @scene = 0
        self
    end

values_at(*args) click to toggle source

    # File lib/RMagick.rb, line 1894
    def values_at(*args)
        a = @images.values_at(*args)
        a = self.class.new
        @images.values_at(*args).each {|image| a << image}
        a.scene = a.length - 1
        return a
    end

Also aliased as: indexes, indices

### Protected Instance Methods

is_an_image(obj) click to toggle source

    # File lib/RMagick.rb, line 1308
    def is_an_image(obj)
        unless obj.kind_of? Magick::Image
            Kernel.raise ArgumentError, "Magick::Image required (#{obj.class} given)"
        end
        true
    end

is_an_image_array(ary) click to toggle source

Ensure array is always an array of Magick::Image objects

    # File lib/RMagick.rb, line 1316
    def is_an_image_array(ary)
        unless ary.respond_to? :each
            Kernel.raise ArgumentError, "Magick::ImageList or array of Magick::Images required (#{ary.class} given)"
        end
        ary.each { |obj| is_an_image obj }
        true
    end

set_current(current) click to toggle source

Find old current image, update scene number current is the id of the old current image.

    # File lib/RMagick.rb, line 1326
    def set_current(current)
        if length() == 0
            self.scene = nil
            return
        # Don't bother looking for current image
        elsif scene() == nil || scene() >= length()
            self.scene = length() - 1
            return
        elsif current != nil
            # Find last instance of "current" in the list.
            # If "current" isn't in the list, set current to last image.
            self.scene = length() - 1
            each_with_index do |f,i|
                if f.__id__ == current
                    self.scene = i
                end
            end
            return
        end
        self.scene = length() - 1
    end

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