Started the code for the Profile Plotting

This small patch adds a new class - ProfileGraphicsView
it's a QGraphicsView based class that will holds all
graphics-items for the plotting.

The setup is simple, just call ui->ListView->plot( dive )  ( that's
already a ProfileGraphicsView and magic will happen.

Since Im using a QGraphicsView , the size of the canvas doesn't
matter and I'm fixing it at 0,0,100,100. when a resize is done,
the resizeEvent will be called, fitting the scene's rectangle on
the view.

Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Converted the Colors.h code to Qt

The colors on colors.h were done to fill a special
struct by Subsurface - I removed that structure and
replaced the code that generated the map of colors
to a QMap. I know that this changes are not very
'welcomed', but C++ has issues on creating & initializing
complex static members, this was the best way that I could
think of.

Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Moved the plot from the cairo version to the Qt version

Started working on the Qt version of the Plot, initially
nothing is printed - but this is not a bad thing,
the program doesn't explodes too. :)

some work had to be done about the 'bool/gboolean' stuff
so I removed all gbooleans in the code that I'v encountered.

A new file was created ( profile.h ) so I could put the
signatures of helper methods that cairo used to call.

till now the code computes the max limits.
Next patch the first drawing will be made.

Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Start plotting something.

The first plotting method was removed from profile.c
to profilegraphics.cpp and some conversion ( almost 1 to 1 )
was made so that the code could work.

Since the code is big - this commit has just a part of it
working - it plots the grid. but already works for testing
the resizing of the window and Zooming ( unimplemented )

Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Plot of the Mean Deph

The mean depth now is plotted correctly.
I wanted to do more stuff on this commit, but since
it required that a few things on profile.c got moved
to profile.h, commited to not have a huge blob for review.

Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Added the code to plot the actual Graph.

This version already plots the dive-graph, with the
gradient and all that jazz. One thing that will be
easily spotted is that the size of the line is very
thick - easily changed, I'm just using the default.
As soon as everything is plotted correctly I'll
fix the lines.

Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>