A lot of changes related to latex:

- Implemented latex for functions
- Fixed Points with greek variable names
- Small changes to test1 to fit latex better
- History re/undos only redraw the graph every 4 change in order to speed up the process when re/undoing a lot of changes.
- Removing some debug related to latex
- Added latexMarkup property for domains, allowing them to be integrated into objects latex.
- Fixed issues related to derivatives and integrals on latex
- Fully fixed variable substitution for latex
- Fixed sequence crashing
- Adding getLatexLabel method for objects that have a latex label.

LogarithmPlotter/util/latex.py

@@ -38,14 +38,14 @@ class Latex(QObject):
         if not path.exists(exprpath):
             fg = color.convertTo(QColor.Rgb)
             fg = f'rgb {fg.redF()} {fg.greenF()} {fg.blueF()}'
-            preview('$$' + latexstring + '$$', viewer='file', filename=exprpath, dvioptions=[
+            preview('$${' + latexstring + '}$$', viewer='file', filename=exprpath, dvioptions=[
                 "-T", "tight", 
                 "-z", "0", 
                 "--truecolor", 
-                f"-D {font_size * 72.27 / 10}", # See https://linux.die.net/man/1/dvipng#-D for convertion
+                f"-D {int(font_size * 72.27 / 100) * 10}", # See https://linux.die.net/man/1/dvipng#-D for convertion
                 "-bg", "Transparent", 
                 "-fg", fg],
-            euler=True)
+            euler=False)
         img = QImage(exprpath);
         # Small hack, not very optimized since we load the image twice, but you can't pass a QImage to QML and expect it to be loaded
         return f'{exprpath},{img.width()},{img.height()}'