blockdiag is a programmatic tool for generating block diagrams. You can easily write something like a screen transition diagram with a program, and you can link with Spyinx. Block diagram generation tool blockdiag

environment

OS:Mac OS X 10.9.5 Python:Ver.2.7.7

Installation procedure

Create /usr/local/Library/Formula/freetype2.rb.

require 'formula'

class Freetype2 <Formula
  url 'http://sourceforge.net/projects/freetype/files/freetype2/2.4.4/freetype-2.4.4.tar.gz/download'
  homepage 'http://freetype.sourceforge.net/index2.html'
  md5 '9273efacffb683483e58a9e113efae9f'
  version '2.4.4'

  # depends_on 'cmake'

  def install
    system "./configure", "--disable-debug", "--disable-dependency-tracking",
                          "--prefix=#{prefix}"
    # system "cmake . #{std_cmake_parameters}"
    system "make install"
  end
end

Install freetype.

$ brew install freetype2

Install PIL.

$ sudo easy_install pil

If successful, the following words will be displayed.

・ ・ ・
Installed /Library/Python/2.7/site-packages/PIL-1.1.7-py2.7-macosx-10.9-intel.egg
Processing dependencies for pil
Finished processing dependencies for pil

Install blockdiag.

$ sudo easy_install blockdiag

How to build

Create text.diag.

blockdiag {
Screen 1->Screen 2->Screen 3;
Screen 2->Screen 4->Screen 1;
}

Build test.diag

Output as png

$ blockdiag test.diag

test.png is created.

Output with SVG

$ blockdiag -Tsvg test.diag

test.svg is output

Output as PDF

$ blockdiag -Tpdf test.diag

If you get an error

If an error occurs 1

If you get the following error when installing PIL.

・ ・ ・
_imagingft.c:73:10: fatal error: 'freetype/fterrors.h' file not found
#include <freetype/fterrors.h>
         ^
1 error generated.
error: command 'cc' failed with exit status 1

Execute the following command to make a symbolic link.

$ sudo ln -s /usr/local/Cellar/freetype2/2.4.4/include/freetype2/freetype /usr/local/include/freetype

If an error occurs 2

When "The _imagingft C module is not installed" is displayed by the blockdiag command

$ blockdiag test.diag
ERROR: The _imagingft C module is not installed

(Proposal 1) Uninstall PIL once

$ sudo easy_install -m PIL
$ sudo rm -rf /Library/Python/2.7/site-packages/PIL-1.1.7-py2.7-macosx-10.9-intel.egg

Reinstall PIL

$ sudo easy_install pil

(Proposal 2) Check if Pillow is installed elsewhere

$ pip freeze

・ ・ ・
Pillow==2.5.3
・ ・ ・

Uninstall Pillow

% sudo pip uninstall pillow

If you run blockdiag in this state, you will get angry if there is no Pillow

% blockdiag test.diag                                                   
Traceback (most recent call last):
  File "/usr/local/bin/blockdiag", line 5, in <module>
    from pkg_resources import load_entry_point
  File "build/bdist.macosx-10.9-intel/egg/pkg_resources.py", line 2867, in <module>

  File "build/bdist.macosx-10.9-intel/egg/pkg_resources.py", line 432, in _build_master
    corresponding to the path entry, and they are added.  `entry` is
  File "build/bdist.macosx-10.9-intel/egg/pkg_resources.py", line 728, in require
    requirements specified when this environment was created, or False
  File "build/bdist.macosx-10.9-intel/egg/pkg_resources.py", line 622, in resolve
    shadow_set = self.__class__([])
pkg_resources.DistributionNotFound: Pillow

Install Pillow

% sudo easy_install Pillow

No more errors

$ blockdiag test.diag
$

blockdiag installation procedure