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33 lines
1.3 KiB
Plaintext
33 lines
1.3 KiB
Plaintext
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CHEMTEXT
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This library is intended to display chemical formulas and equations with
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automatically placed subscripts and superscripts.
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The procedure ChemTextOut draws the chemical text onto any canvas object
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(useful for writing event handlers for user drawn lists and grids).
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This procedure is used by the component TChemLabel to display chemical formulas
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on the forms.
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The formulas are written in a straightforward way. The "2" in H2O is automatically
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subscripted, and the + in H+ is automatically displayed as superscript. Note
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that multiple-charge ions must repeat the charge sign, i.e. the double-negatively
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charged oxygon ion must be written as O--, not as O2-.
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For chemical reactions, arrows can be entered as -->, <-- or <-->. The property
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Arrow of the TChemLabel determines whether this simple is to be replaced by
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a nice UTF8 character.
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The code is based on "chemtxt" written by Patrick Spanel
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(Patrik.Spanel@jh-inst.cas.cz). It was adapted to Lazarus and extended by
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Werner Pamler.
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The code does not work under Delphi any more.
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License:
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LGPL with linking exception (the same license used by Lazarus).
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The palette icon was painted by Roland Hahn and is not subject to any
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restrictions.
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