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* Started on ACS 1996 drawing mode. Significant change (not by itself, sadly) is that MolDrawOptions::lineWidth has changed from int to double to allow for ACS requirement of 0.6px bond widths. * Wavy lines and dashed wedges. * Better dashed wedges. * Rounder wavy bonds, same as SVG. * Added FreeSans font for ACS1996 mode. * Add help functions to write enum classes to ostream. * Dashed wedge separation now 2.5px between line edges rather than line middles. Therefore wider gap between lines. * Increase offset for wavy bond. Get classes for atoms and bonds in wavy bond correct. * For SMILES input, option to force wavy and crossed bonds for unspecified stereochem. * Tidy debugging. * Extra space round atom labels. * Extra space between chars in freetype string. * Reformats. * Change double bond offset. * Improve ring double bonds. * Simple non-ring double bonds all working. * Tidy. * All double bonds seem good. * Remove redundant function. Move calcTripleBondLines into DrawMol for consistency with calcDoubleBondLines. Use doubleBondOffset for wavy lines. * Correct spacing between FT chars. * Tidying. * Use MolBlock wedging if there is any. Needs to be made an option. * If dashed wedge thick end has bonds of it, stop one dash short. * Adjust solid wedge ends to line with attached bonds. * Width of wedge ends now based on double bond separation. * Change catch_tests.cpp * Rounder waves in wavy lines. * Dashed wedges same width even if one dash less.. * Embedded Roboto-Regular font in code. * Fix docstrings. * doubleBondTerminal swapped ends. Deal with O2 - 2 terminal atoms of degree 1. * Fix terminal double bonds. * Slightly fatter truncated wedge bonds. * Fix crash on complicated double bonds. * Control more assert tests with DO_TEST_ASSERT. * Fix 2 colour solid wedges. Fix slanted wedge for morphine (test1_5). * Change definittion of multipleBondOffset to fraction of mean bond length. * Don't slant end of solid wedge to atom symbol. * Fix wiggle separation. * Fix 2-colour terminal double bonds. * Fix colours on triple bonds. * Don't attempt to draw non-existent points in triangle.. * Symmetric bond for P=O and like. * Fix query bonds. * Reformatting. * Tidy up use of font. * Add FreeSans font and license to $RDBASE/Data/Fonts. * Draw unspecified stereo as unknown. * Add check_file_hash. * Tidying. * Tidying. * Start Python wrappers. * Fix solid wedges for 3-connected atoms. * Docstrings. * Tidying. * Alter width of bond highlights in ACS 1996 mode. * Expose setACS1996Options and mean BondLength in Python. * Expose drawMolACS1996Cairo in Python. Docstrings. * Extra padding between legend and picture in flexicanvas. * Python tests. * Tidy catch tests. * Tidying. * Fix catch tests. * Fix no Freetype tests. * Draw solid wedge more sensibly.. * Fix bond end at solid wedge. * Tidy. * Fix Python Cairo build issues. * Fix wedge end shape for terminal double bonds. * Hide the joins at the bond ends. * Fix gcc pickiness. * Extra test for no atom labels. * Change where it looks for FreeSans.ttf for ACS1996 drawings. * Same number of waves for wavy bonds in SVG and Cairo. * Same number of waves for wavy bonds in SVG and Cairo. * rename unspecifiedStereoIsUnknown to markUnspecifiedStereoAsUnknown and move to MolFileStereochem.h * refactor use of iterators * py docs update * undo a bunch of bad formatting changes * remove FreeSans * get windows builds working * Fix problem with Windows build. * Changes in response to review. * Align description of unspecifiedStereoIsUnknown in C++ to match Python. * Still working on file open modes. * Took out extraneous functions for drawing in ACS1996 mode, including the one that was breaking the windows build. * Add RDKIT_MOLDRAW2D_EXPORT. * Fix expected test results. * Clarified warning. * RDKIT_MOLDRAW2D_EXPORT missing. * Windows! * Update Code/GraphMol/MolDraw2D/rxn_test1.cpp Co-authored-by: David Cosgrove <david@cozchemix.co.uk> Co-authored-by: greg landrum <greg.landrum@gmail.com>