move files to ./src directory
boilerplate code of my new GocItem that is inherited from GocWidget...
implement arrow for testing... looks fine so far
remove big arrow and arcs from main canvas
include 'my-system.h'
don't move other items than GocWidget anylonger
changed formatting
populate canvas with only two systems...
energy flow is redrawn if the allocation of the associated system changes
populate canvas with three different systems. One that gets energy from the environment. One that transfers energy to the environment. One that transfers energy to another system.
add three different kinds of energy transfers (to the environment, from the environment, to another system)
add another system to canvas to illustrate a pair of systems that transfer energy between each other
add two more columns to ListStore that contain the label data
add math library
add label support. not working flawlessly yet.
make the rotation of the arrow label right
changed label
changed prototype
remove label specific code from my-system
add new GocItem that inherits from GocLine that also draws labels