Fix crash when :
1°-Open a project with terminal strip and open the terminal strip editor
2°-Close the terminal strip editor and the project (keep qelectrotech
open).
3°-redo step 1 and click on an item in the tree at left of the window,
qet crash.
Qet don't crash anymore but the terminal strip editor continue to work
with the terminal strip of the first opening (exactly the pointer of the
terminal strip) who don't exist anymore. Need more work.
Add a new class TerminalStripLayoutPatternXml used to
save / load a TerminalStripLayoutPattern class into a xml.
Also create the namespace QETSVG used to read/write some
svg element / attribute to xml. This class is used by the
class TerminalStripLayoutPatternXml.
Initially it was planned to have separate text configuration for every
terminal level. It's not useful, use same properties for every level is
sufficient and visually more consistent.
By consequent every QVector related to these properties was replaced by
a single value.
The bounding rectangle used to define the position of the terminal text
can be edited. The y position and height can now be edited. The width is
not editable because is always the width of the rectangle of the of the
terminal.
Add a little function used to convert if needed the size of a font set
in dpi to pixel. Because the conversion from pdi to pixel can't
be exactly identical, the text size in the diagram can be a little
different, in the other side the switch between screens with different
dpi is no more a problem.
TerminalStripLayoutPattern class is now a shared pointer between all
terminal strip item.
QETProject have now a new class : ProjectPropertiesHandler
the goal of this class is to manage every kind of properties used in the
project, this class will be strongly used in future.
* terminal_strip:
Terminal strip item can saved / loaded to .qet file
See previous commit...
Move terminal strip drawer class in is own file
Fix wrong use of QStringLiteral and QLatin1String
Double click a TerminalStripItem open the editor
Minor change about checkable QAction of QetDiagramEditor
Minor : corrects a minor aesthetic defect when unbridge terminals
Revamp code
Add and move terminal strip item are now managed by undo command
TerminalStripItem : Draw terminal bridge
Terminal strip item can be added to diagram
Minor : add QGIUtility namespace
